Fix delimiter highlighting in Firefox #27

input:first-line doesn't work in Firefox.
So, we use input background instead

.eslintrc.js

@@ -12,13 +12,14 @@ module.exports = {
   },
   rules: {
     'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
-    'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off'
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
+    'no-case-declarations': 'off'
   },
   overrides: [
     {
       files: [
         '**/__tests__/*.{j,t}s?(x)',
-        '**/tests/unit/**/*.spec.{j,t}s?(x)'
+        '**/tests/**/*.spec.{j,t}s?(x)'
       ],
       env: {
         mocha: true

.github/workflows/test.yml

@@ -0,0 +1,30 @@
+name: Run tests
+on:
+  workflow_dispatch:
+  push:
+    branches:
+    - 'master'
+
+jobs:
+  test:
+    name: Run tests
+    runs-on: ubuntu-latest    
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: 10.x
+    - name: Install chromium
+      run:  
+        sudo DEBIAN_FRONTEND=noninteractive apt-get update && 
+        sudo DEBIAN_FRONTEND=noninteractive apt-get install -y chromium-browser
+
+    - name: Install the project
+      run: npm install
+
+    - name: Run lint
+      run: npm run lint
+
+    - name: Run karma tests
+      run: npm run test

README.md

@@ -4,22 +4,167 @@
 
 # sqliteviz
 
-**Note: This is a work-in-progress project.**
+Sqliteviz is a single-page application for fully client-side visualisation of SQLite databases or CSV.
 
-Sqliteviz is a single-page application for fully client-side visualisation of SQLite databases.
+## Get started
+
+The latest release of sqliteviz is running on [Github pages][6]. The simplest way to start is to use sqliteviz there.
+
+### Choose a databese or CSV file
+
+You can choose a database or CSV file right on the welcom page (fig. 1). The supported file extentions: `.csv`, `.db`,`.sqlite` and `.sqlite3`.
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_welcome.png" width="400"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 1: Welcome page
+  </sub>
+</p>
+
+If you choose a CSV file it will be parsed. Then sqliteviz creates a new database with data from the CSV in `csv_import` table. You can change parsing settings in the dialog which is shown automatically if you choose a CSV file (fig. 2).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_csv.png" width="650"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 2: Import CSV dialog
+  </sub>
+</p>
+
+Choosing a database or CSV file is not a mandatory step. You can skip it and manipulate queries in sqliteviz without a database. Choose a database or CSV later in the left panel of the `Editor` when it's time to run a query (fig. 3).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_editor.png" width="650"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 3: Editor (neither database nor CSV is chosen) 
+  </sub>
+</p>
+
+After chosing a database or CSV you can browse tables, columns and their types in the left panel of the `Editor` (fig. 4).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_editor_with_db.png" width="650"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 4: Editor (database is chosen)
+  </sub>
+</p>
+
+### Create a query
+
+#### Open a new tab
+
+Press `Create` button in the top toolbar or use `Ctrl+b`(`Cmd+b` for MacOS) keyboard shortcut to open a new tab for a query. The tab consists of two parts: a query text editor on the top and a result panel on the bottom.
+
+In the query text editor part you can specify a `SELECT` statement for getting data.
+
+The result panel has two modes: table view (fig. 4, fig. 5) and chart view (fig. 3). In the table view you can see the result of query running (fig. 5). In the chart view there is a chart editor component which allows to build a visialization from the result set.
+
+#### Run a query
+
+Press `Run` button in the top toolbar or use `Ctrl+r` or `Ctrl+Enter`(`Cmd+r` or `Cmd+Enter` for MacOS) keyboard shortcut to execute a query in the current opened tab.
+
+> **Note:**  Running is not available if neither a database nor CSV was chosen or a query for the current tab is not specified.
+
+The query result will be displayed in the result panel in table mode (fig. 5).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_result.png" width="650"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 5: Query results
+  </sub>
+</p>
+
+#### Create a chart
+
+After running a query you can switch result panel to the chart mode and create a chart with a `react-chart-editor` component. The same component with some additional features is used in Plotly Chart Studio. Explore its [documentation][7] to learn how to build charts with `react-chart-editor`.
+
+### Save a query
+
+Press `Save` button in the top toolbar or use `Ctrl+s`(`Cmd+s` for MacOS) keyboard shortcut to save a query in the current opened tab to local storage of your browser.
+
+After that the query will be in the list on `My queries` page.
+
+> **Note:**  Only the text of the query and chart settings will be saved. The result of the query execution won't be saved.
+
+## Working with saved queries
+
+You can find all queries that you saved in `My queries` (fig. 6).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_my_queries.png" width="600"/>
+</p>
+
+<p align="center">
+  <sub>
+    Fig. 6: My queries
+  </sub>
+</p>
+
+To manipulate one query hover the cursor over the row with the query and choose the action:
+
+* <img src="src/assets/images/rename.svg"/> - rename a query
+* <img src="src/assets/images/copy.svg"/> - duplicate a query
+* <img src="src/assets/images/file-export.svg"/> - export a query to json file
+* <img src="src/assets/images/delete.svg"/> - delete a query
+
+To edit the text of a query or its chart settings click on the respective row. You will be redirected to `Editor` where the chosen query will be opened in a tab.
+
+> **Note:** After opening a query there will be no chart for it even if you specified it and saved. That is so because there is no data to build the chart. Run the query and all saved chart settings will be applied.
+
+You can also delete or export to file a group of queries. Select queries with checkboxes and press `Delete`/`Export` button above the grid (fig. 7).
+
+<p align="center">
+   <img class="figure" src="src/assets/images/Screenshot_group.png" width="600"/> 
+</p>
+
+
+<p align="center">
+  <sub>
+    Fig. 7: My queries: a group of queries is selected
+   </sub>
+</p>
+
+> **Note:** Some operations are not available for predefined queries (see below).
+
+## Import queries
+
+Click `Import` button on `My queries` page to import queries from JSON file generated by export.
+
+## Predefined queries
+
+If you run sqliteviz on your own server you can specify predefined queries. These queries will be in `My queries` list for all users working with sqliteviz on your server.
+
+To create a list of predefined queries choose queries in `My queries` list and export them to `queries.json`. Then place this file on the server in the same directory as `index.html`.
+
+A user can't edit, rename or delete a predefined query. The rest operations are available.
+
+## Motivation
 It's a kind of middleground between [Plotly Falcon][1] and [Redash][2].
-It is built on top of [react-chart-editor][3] and [sql.js][4] in [Vue.js][5]. 
 
-## Features
-
-1. Ad-hoc and prepared visualisation of a SQLite database using flexibility
-   of SQL and richness of Plotly's `react-chart-editor` 
-2. Visualisation pallete, SQL and chart definitions, kept in local
-   storage with import/export
-3. Integration-side provided pallete
+## Components
+It is built on top of [react-chart-editor][3], [sql.js][4] and [Vue-Codemirror][8] in [Vue.js][5]. CSV parsing is performed with [Papa Parse][9].
 
 [1]: https://github.com/plotly/falcon
 [2]: https://github.com/getredash/redash
 [3]: https://github.com/plotly/react-chart-editor
 [4]: https://github.com/sql-js/sql.js
 [5]: https://github.com/vuejs/vue
+[6]: https://lana-k.github.io/sqliteviz
+[7]: https://plotly.com/chart-studio-help/tutorials/#basic
+[8]: https://github.com/surmon-china/vue-codemirror#readme
+[9]: https://www.papaparse.com/
+

karma.conf.js

@@ -1,31 +1,26 @@
 // Karma configuration
-"use strict";
-const path = require("path");
-const VueLoaderPlugin = require("vue-loader/lib/plugin");
+'use strict'
+const path = require('path')
+const VueLoaderPlugin = require('vue-loader/lib/plugin')
 
-function resolve(dir) {
-  return path.join(__dirname, dir);
+function resolve (dir) {
+  return path.join(__dirname, dir)
 }
 
-module.exports = function(config) {
+module.exports = function (config) {
   config.set({
     // base path that will be used to resolve all patterns (eg. files, exclude)
-    basePath: "",
+    basePath: '',
 
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
-    frameworks: ["mocha", "sinon-chai"],
+    frameworks: ['mocha', 'sinon-chai'],
 
     // list of files / patterns to load in the browser
     files: [
-      "tests/unit/*.spec.js",
-      { pattern: 'node_modules/sql.js/dist/sql-wasm.wasm',
-        watched: false,
-        included: false,
-        served: true,
-        nocache: false
-      },
-      { pattern: 'node_modules/sql.js/dist/worker.sql-wasm.js',
+      './karma.files.js',
+      {
+        pattern: 'node_modules/sql.js/dist/sql-wasm.wasm',
         watched: false,
         included: false,
         served: true,
@@ -39,29 +34,29 @@ module.exports = function(config) {
     // preprocess matching files before serving them to the browser
     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
     preprocessors: {
-      "tests/unit/*.spec.js": ["webpack"]
+      './karma.files.js': ['webpack']
     },
 
     // test results reporter to use
     // possible values: 'dots', 'progress'
     // available reporters: https://npmjs.org/browse/keyword/karma-reporter
-    reporters: ["spec", "coverage"],
+    reporters: ['spec', 'coverage'],
 
     coverageReporter: {
-      dir: "coverage",
-      reporters: [{ type: "lcov", subdir: "." }, { type: "text-summary" }]
+      dir: 'coverage',
+      reporters: [{ type: 'lcov', subdir: '.' }, { type: 'text-summary' }]
     },
 
     // !!DONOT delete this reporter, or vue-cli-addon-ui-karma doesnot work
     jsonResultReporter: {
-      outputFile: "report/karma-result.json",
+      outputFile: 'report/karma-result.json',
       isSynchronous: true
     },
 
     junitReporter: {
-      outputDir: "report", // results will be saved as $outputDir/$browserName.xml
+      outputDir: 'report', // results will be saved as $outputDir/$browserName.xml
       outputFile: undefined, // if included, results will be saved as $outputDir/$browserName/$outputFile
-      suite: "", // suite will become the package name attribute in xml testsuite element
+      suite: '', // suite will become the package name attribute in xml testsuite element
       useBrowserName: true, // add browser name to report and classes names
       nameFormatter: undefined, // function (browser, result) to customize the name attribute in xml testcase element
       classNameFormatter: undefined, // function (browser, result) to customize the classname attribute in xml testcase element
@@ -79,11 +74,11 @@ module.exports = function(config) {
     logLevel: config.LOG_INFO,
 
     // enable / disable watching file and executing tests whenever any file changes
-    autoWatch: true,
+    autoWatch: false,
 
     // start these browsers
     // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: ["ChromiumHeadless"],
+    browsers: ['ChromiumHeadless'],
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
@@ -98,16 +93,16 @@ module.exports = function(config) {
     },
     browserConsoleLogOptions: {
       terminal: true,
-      level: ""
+      level: ''
     },
     webpack: {
-      mode: "development",
-      entry: "./src/main.js",
+      mode: 'development',
+      entry: './src/main.js',
       resolve: {
-        extensions: [".js", ".vue", ".json"],
+        extensions: ['.js', '.vue', '.json'],
         alias: {
-          vue$: "vue/dist/vue.esm.js",
-          "@": resolve("src")
+          vue$: 'vue/dist/vue.esm.js',
+          '@': resolve('src')
         }
       },
       module: {
@@ -117,46 +112,57 @@ module.exports = function(config) {
             exclude: /(node_modules|bower_components)/,
             use: [
               {
-                loader: "babel-loader"
-              },
+                loader: 'babel-loader'
+              }
+            ]
+          },
+          {
+            test: /\.js$/,
+            include: /src/,
+            exclude: /(node_modules|bower_components|\.spec\.js$)/,
+            use: [
               {
-                loader: "istanbul-instrumenter-loader",
+                loader: 'istanbul-instrumenter-loader',
                 options: {
                   esModules: true
                 }
               }
             ]
           },
+          {
+            test: /\.worker\.js$/,
+            loader: 'worker-loader'
+          },
           {
             test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
-            loader: "url-loader"
+            loader: 'url-loader'
           },
           {
             test: /\.vue$/,
-            loader: "vue-loader",
+            loader: 'vue-loader',
             options: {
               loaders: {
-                js: "babel-loader"
+                js: 'babel-loader'
               },
               postLoaders: {
-                js: "istanbul-instrumenter-loader?esModules=true"
+                js: 'istanbul-instrumenter-loader?esModules=true'
               }
             }
           },
           {
             test: /\.css$/,
-            use: ["vue-style-loader", "css-loader"]
+            use: ['vue-style-loader', 'css-loader']
           },
           {
             test: /\.scss$/,
-            use: ["vue-style-loader", "css-loader", "sass-loader"]
+            use: ['vue-style-loader', 'css-loader', 'sass-loader']
           },
           {
             test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
-            loader: "url-loader",
+            loader: 'url-loader',
             options: {
               limit: 10000,
-              name: resolve("fonts/[name].[hash:7].[ext]")
+              name: resolve('fonts/[name].[hash:7].[ext]')
             }
           }
         ]
@@ -166,8 +172,16 @@ module.exports = function(config) {
         fs: 'empty'
       }
     },
+    webpackMiddleware: {
+      watchOptions: {
+        ignored: /node_modules/
+      }
+    },
     proxies: {
-      "/js/": "/base/node_modules/sql.js/dist/"
+      '/_karma_webpack_/sql-wasm.wasm': '/base/node_modules/sql.js/dist/sql-wasm.wasm',
+      '/base/sql-wasm.wasm': '/base/node_modules/sql.js/dist/sql-wasm.wasm'
     }
-  });
-};
+  })
+  // Fix the timezone
+  process.env.TZ = 'Europe/Amsterdam'
+}

karma.files.js

@@ -0,0 +1,21 @@
+import Vue from 'vue'
+import { VuePlugin } from 'vuera'
+import VModal from 'vue-js-modal'
+
+Vue.use(VuePlugin)
+Vue.use(VModal)
+Vue.config.productionTip = false
+
+// require all test files (files that ends with .spec.js)
+const testsContext = require.context('./tests', true, /\.spec.js$/)
+
+// Read more about why we need to call testContext:
+// https://www.npmjs.com/package/require-context#context-api
+testsContext.keys().forEach(testsContext)
+
+// require all src files except main.js and router/index.js for coverage.
+// you can also change this to match only the subset of files that
+// you want coverage for.
+// We don't include router/index.js to avoid installing VueRouter globally in tests
+const srcContext = require.context('./src', true, /^\.\/(?!(main|(router(\/)?(index)?))(\.js)?$)/)
+srcContext.keys().forEach(srcContext)

package-lock.json

@@ -1,19 +1,21 @@
 {
   "name": "sqliteviz",
-  "version": "0.6.0",
+  "version": "1.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "sqliteviz",
-      "version": "0.6.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "dependencies": {
         "codemirror": "^5.57.0",
         "core-js": "^3.6.5",
         "debounce": "^1.2.0",
         "nanoid": "^3.1.12",
+        "papaparse": "^5.3.0",
         "plotly.js": "^1.57.1",
+        "promise-worker": "^2.0.1",
         "react": "^16.13.1",
         "react-chart-editor": "^0.42.0",
         "react-dom": "^16.13.1",
@@ -34,9 +36,10 @@
         "@vue/cli-plugin-vuex": "^4.4.0",
         "@vue/cli-service": "^4.4.0",
         "@vue/eslint-config-standard": "^5.1.2",
-        "@vue/test-utils": "^1.0.3",
+        "@vue/test-utils": "^1.1.2",
         "babel-eslint": "^10.1.0",
         "chai": "^4.1.2",
+        "chai-as-promised": "^7.1.1",
         "eslint": "^6.7.2",
         "eslint-plugin-import": "^2.20.2",
         "eslint-plugin-node": "^11.1.0",
@@ -46,7 +49,8 @@
         "karma": "^3.1.4",
         "karma-webpack": "^4.0.2",
         "vue-cli-plugin-ui-karma": "^0.2.5",
-        "vue-template-compiler": "^2.6.11"
+        "vue-template-compiler": "^2.6.11",
+        "worker-loader": "^3.0.8"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -1559,9 +1563,9 @@
       }
     },
     "node_modules/@types/json-schema": {
-      "version": "7.0.5",
-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.5.tgz",
-      "integrity": "sha512-7+2BITlgjgDhH0vvwZU/HZJVyk+2XUlvxXe8dFMedNX/aMkaOq++rMAFXc0tM7ij15QaWlbdQASBR9dihi+bDQ==",
+      "version": "7.0.7",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.7.tgz",
+      "integrity": "sha512-cxWFQVseBm6O9Gbw1IWb8r6OS4OhSt3hPZLkFApLjM8TEXROBuQGLAH2i2gZpcXdLBIrpXuTDhH7Vbm1iXmNGA==",
       "dev": true
     },
     "node_modules/@types/json5": {
@@ -2166,14 +2170,18 @@
       }
     },
     "node_modules/@vue/test-utils": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@vue/test-utils/-/test-utils-1.0.3.tgz",
-      "integrity": "sha512-mmsKXZSGfvd0bH05l4SNuczZ2MqlJH2DWhiul5wJXFxbf/gRRd2UL4QZgozEMQ30mRi9i4/+p4JJat8S4Js64Q==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@vue/test-utils/-/test-utils-1.1.2.tgz",
+      "integrity": "sha512-utbIL7zn9c+SjhybPwh48lpWCiluFCbP1yyRNAy1fQsw/6hiNFioaWy05FoVAFIZXC5WwBf+5r4ypfM1j/nI4A==",
       "dev": true,
       "dependencies": {
         "dom-event-types": "^1.0.0",
         "lodash": "^4.17.15",
         "pretty": "^2.0.0"
+      },
+      "peerDependencies": {
+        "vue": "2.x",
+        "vue-template-compiler": "^2.x"
       }
     },
     "node_modules/@vue/web-component-wrapper": {
@@ -2506,15 +2514,19 @@
       }
     },
     "node_modules/ajv": {
-      "version": "6.12.3",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
-      "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "dev": true,
       "dependencies": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
         "json-schema-traverse": "^0.4.1",
         "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
       }
     },
     "node_modules/ajv-errors": {
@@ -2524,10 +2536,13 @@
       "dev": true
     },
     "node_modules/ajv-keywords": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.5.1.tgz",
-      "integrity": "sha512-KWcq3xN8fDjSB+IMoh2VaXVhRI0BBGxoYp3rx7Pkb6z0cFjYR9Q9l4yZqqals0/zsioCmocC5H6UvsGD4MoIBA==",
-      "dev": true
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.5.2.tgz",
+      "integrity": "sha512-5p6WTN0DdTGVQk6VjcEju19IgaHudalcfabD7yhDGeA6bcQnmL+CpveLJq/3hvfwd1aof6L386Ougkx6RfyMIQ==",
+      "dev": true,
+      "peerDependencies": {
+        "ajv": "^6.9.1"
+      }
     },
     "node_modules/align-text": {
       "version": "0.1.4",
@@ -4292,6 +4307,18 @@
         "node": ">=4"
       }
     },
+    "node_modules/chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "dependencies": {
+        "check-error": "^1.0.2"
+      },
+      "peerDependencies": {
+        "chai": ">= 2.1.2 < 5"
+      }
+    },
     "node_modules/chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -14822,6 +14849,11 @@
       "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
       "dev": true
     },
+    "node_modules/papaparse": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/papaparse/-/papaparse-5.3.0.tgz",
+      "integrity": "sha512-Lb7jN/4bTpiuGPrYy4tkKoUS8sTki8zacB5ke1p5zolhcSE4TlWgrlsxjrDTbG/dFVh07ck7X36hUf/b5V68pg=="
+    },
     "node_modules/parallel-transform": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/parallel-transform/-/parallel-transform-1.2.0.tgz",
@@ -16283,6 +16315,11 @@
       "integrity": "sha1-mEcocL8igTL8vdhoEputEsPAKeM=",
       "dev": true
     },
+    "node_modules/promise-worker": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/promise-worker/-/promise-worker-2.0.1.tgz",
+      "integrity": "sha512-jR7vHqMEwWJ15i9vA3qyCKwRHihyLJp1sAa3RyY5F35m3u5s2lQUfq0nzVjbA8Xc7+3mL3Y9+9MHBO9UFRpFxA=="
+    },
     "node_modules/prop-types": {
       "version": "15.7.2",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
@@ -21995,6 +22032,58 @@
         "errno": "~0.1.7"
       }
     },
+    "node_modules/worker-loader": {
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/worker-loader/-/worker-loader-3.0.8.tgz",
+      "integrity": "sha512-XQyQkIFeRVC7f7uRhFdNMe/iJOdO6zxAaR3EWbDp45v3mDhrTi+++oswKNxShUNjPC/1xUp5DB29YKLhFo129g==",
+      "dev": true,
+      "dependencies": {
+        "loader-utils": "^2.0.0",
+        "schema-utils": "^3.0.0"
+      },
+      "engines": {
+        "node": ">= 10.13.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/webpack"
+      },
+      "peerDependencies": {
+        "webpack": "^4.0.0 || ^5.0.0"
+      }
+    },
+    "node_modules/worker-loader/node_modules/loader-utils": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.0.tgz",
+      "integrity": "sha512-rP4F0h2RaWSvPEkD7BLDFQnvSf+nK+wr3ESUjNTyAGobqrijmW92zc+SO6d4p4B1wh7+B/Jg1mkQe5NYUEHtHQ==",
+      "dev": true,
+      "dependencies": {
+        "big.js": "^5.2.2",
+        "emojis-list": "^3.0.0",
+        "json5": "^2.1.2"
+      },
+      "engines": {
+        "node": ">=8.9.0"
+      }
+    },
+    "node_modules/worker-loader/node_modules/schema-utils": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.0.0.tgz",
+      "integrity": "sha512-6D82/xSzO094ajanoOSbe4YvXWMfn2A//8Y1+MUqFAJul5Bs+yn36xbK9OtNDcRVSBJ9jjeoXftM6CfztsjOAA==",
+      "dev": true,
+      "dependencies": {
+        "@types/json-schema": "^7.0.6",
+        "ajv": "^6.12.5",
+        "ajv-keywords": "^3.5.2"
+      },
+      "engines": {
+        "node": ">= 10.13.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/webpack"
+      }
+    },
     "node_modules/world-calendars": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/world-calendars/-/world-calendars-1.0.3.tgz",
@@ -23748,9 +23837,9 @@
       }
     },
     "@types/json-schema": {
-      "version": "7.0.5",
-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.5.tgz",
-      "integrity": "sha512-7+2BITlgjgDhH0vvwZU/HZJVyk+2XUlvxXe8dFMedNX/aMkaOq++rMAFXc0tM7ij15QaWlbdQASBR9dihi+bDQ==",
+      "version": "7.0.7",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.7.tgz",
+      "integrity": "sha512-cxWFQVseBm6O9Gbw1IWb8r6OS4OhSt3hPZLkFApLjM8TEXROBuQGLAH2i2gZpcXdLBIrpXuTDhH7Vbm1iXmNGA==",
       "dev": true
     },
     "@types/json5": {
@@ -24288,9 +24377,9 @@
       "dev": true
     },
     "@vue/test-utils": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@vue/test-utils/-/test-utils-1.0.3.tgz",
-      "integrity": "sha512-mmsKXZSGfvd0bH05l4SNuczZ2MqlJH2DWhiul5wJXFxbf/gRRd2UL4QZgozEMQ30mRi9i4/+p4JJat8S4Js64Q==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@vue/test-utils/-/test-utils-1.1.2.tgz",
+      "integrity": "sha512-utbIL7zn9c+SjhybPwh48lpWCiluFCbP1yyRNAy1fQsw/6hiNFioaWy05FoVAFIZXC5WwBf+5r4ypfM1j/nI4A==",
       "dev": true,
       "requires": {
         "dom-event-types": "^1.0.0",
@@ -24609,9 +24698,9 @@
       }
     },
     "ajv": {
-      "version": "6.12.3",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
-      "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "dev": true,
       "requires": {
         "fast-deep-equal": "^3.1.1",
@@ -24627,10 +24716,11 @@
       "dev": true
     },
     "ajv-keywords": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.5.1.tgz",
-      "integrity": "sha512-KWcq3xN8fDjSB+IMoh2VaXVhRI0BBGxoYp3rx7Pkb6z0cFjYR9Q9l4yZqqals0/zsioCmocC5H6UvsGD4MoIBA==",
-      "dev": true
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.5.2.tgz",
+      "integrity": "sha512-5p6WTN0DdTGVQk6VjcEju19IgaHudalcfabD7yhDGeA6bcQnmL+CpveLJq/3hvfwd1aof6L386Ougkx6RfyMIQ==",
+      "dev": true,
+      "requires": {}
     },
     "align-text": {
       "version": "0.1.4",
@@ -26180,6 +26270,15 @@
         "type-detect": "^4.0.5"
       }
     },
+    "chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "requires": {
+        "check-error": "^1.0.2"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -35225,6 +35324,11 @@
       "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
       "dev": true
     },
+    "papaparse": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/papaparse/-/papaparse-5.3.0.tgz",
+      "integrity": "sha512-Lb7jN/4bTpiuGPrYy4tkKoUS8sTki8zacB5ke1p5zolhcSE4TlWgrlsxjrDTbG/dFVh07ck7X36hUf/b5V68pg=="
+    },
     "parallel-transform": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/parallel-transform/-/parallel-transform-1.2.0.tgz",
@@ -36512,6 +36616,11 @@
       "integrity": "sha1-mEcocL8igTL8vdhoEputEsPAKeM=",
       "dev": true
     },
+    "promise-worker": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/promise-worker/-/promise-worker-2.0.1.tgz",
+      "integrity": "sha512-jR7vHqMEwWJ15i9vA3qyCKwRHihyLJp1sAa3RyY5F35m3u5s2lQUfq0nzVjbA8Xc7+3mL3Y9+9MHBO9UFRpFxA=="
+    },
     "prop-types": {
       "version": "15.7.2",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
@@ -41538,6 +41647,40 @@
         "errno": "~0.1.7"
       }
     },
+    "worker-loader": {
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/worker-loader/-/worker-loader-3.0.8.tgz",
+      "integrity": "sha512-XQyQkIFeRVC7f7uRhFdNMe/iJOdO6zxAaR3EWbDp45v3mDhrTi+++oswKNxShUNjPC/1xUp5DB29YKLhFo129g==",
+      "dev": true,
+      "requires": {
+        "loader-utils": "^2.0.0",
+        "schema-utils": "^3.0.0"
+      },
+      "dependencies": {
+        "loader-utils": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.0.tgz",
+          "integrity": "sha512-rP4F0h2RaWSvPEkD7BLDFQnvSf+nK+wr3ESUjNTyAGobqrijmW92zc+SO6d4p4B1wh7+B/Jg1mkQe5NYUEHtHQ==",
+          "dev": true,
+          "requires": {
+            "big.js": "^5.2.2",
+            "emojis-list": "^3.0.0",
+            "json5": "^2.1.2"
+          }
+        },
+        "schema-utils": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.0.0.tgz",
+          "integrity": "sha512-6D82/xSzO094ajanoOSbe4YvXWMfn2A//8Y1+MUqFAJul5Bs+yn36xbK9OtNDcRVSBJ9jjeoXftM6CfztsjOAA==",
+          "dev": true,
+          "requires": {
+            "@types/json-schema": "^7.0.6",
+            "ajv": "^6.12.5",
+            "ajv-keywords": "^3.5.2"
+          }
+        }
+      }
+    },
     "world-calendars": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/world-calendars/-/world-calendars-1.0.3.tgz",

package.json

@@ -1,12 +1,12 @@
 {
   "name": "sqliteviz",
-  "version": "0.7.0",
+  "version": "1.0.0",
   "license": "Apache-2.0",
   "private": true,
   "scripts": {
     "serve": "vue-cli-service serve",
     "build": "NODE_OPTIONS=--max_old_space_size=4096 vue-cli-service build",
-    "test:unit": "vue-cli-service test:unit",
+    "test": "vue-cli-service karma",
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
@@ -14,7 +14,9 @@
     "core-js": "^3.6.5",
     "debounce": "^1.2.0",
     "nanoid": "^3.1.12",
+    "papaparse": "^5.3.0",
     "plotly.js": "^1.57.1",
+    "promise-worker": "^2.0.1",
     "react": "^16.13.1",
     "react-chart-editor": "^0.42.0",
     "react-dom": "^16.13.1",
@@ -35,9 +37,10 @@
     "@vue/cli-plugin-vuex": "^4.4.0",
     "@vue/cli-service": "^4.4.0",
     "@vue/eslint-config-standard": "^5.1.2",
-    "@vue/test-utils": "^1.0.3",
+    "@vue/test-utils": "^1.1.2",
     "babel-eslint": "^10.1.0",
     "chai": "^4.1.2",
+    "chai-as-promised": "^7.1.1",
     "eslint": "^6.7.2",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-node": "^11.1.0",
@@ -47,6 +50,7 @@
     "karma": "^3.1.4",
     "karma-webpack": "^4.0.2",
     "vue-cli-plugin-ui-karma": "^0.2.5",
-    "vue-template-compiler": "^2.6.11"
+    "vue-template-compiler": "^2.6.11",
+    "worker-loader": "^3.0.8"
   }
 }

public/queries.json

@@ -0,0 +1 @@
+[]

src/App.vue

@@ -5,11 +5,58 @@
 </template>
 
 <style>
-#app {
-  font-family: Open-Sans, Helvetica, Arial, sans-serif;
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-Regular.woff2");
+  font-weight: 400;
+  font-style: normal;
+}
+
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-SemiBold.woff2");
+  font-weight: 600;
+  font-style: normal;
+}
+
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-Bold.woff2");
+  font-weight: 700;
+  font-style: normal;
+}
+
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-Italic.woff2");
+  font-weight: 400;
+  font-style: italic;
+}
+
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-SemiBoldItalic.woff2");
+  font-weight: 600;
+  font-style: italic;
+}
+
+@font-face {
+  font-family: "Open Sans";
+  src: url("~@/assets/fonts/OpenSans-BoldItalic.woff2");
+  font-weight: 700;
+  font-style: italic;
+}
+
+#app,
+input,
+label,
+button,
+.plotly_editor * {
+  font-family: "Open Sans", Helvetica, Arial, sans-serif;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
+
 body {
   margin: 0;
 }

src/ascii.js

@@ -0,0 +1,130 @@
+export default {
+  0: { name: 'null character' },
+  1: { name: 'start of header' },
+  2: { name: 'start of text' },
+  3: { name: 'end of text' },
+  4: { name: 'end of transmission' },
+  5: { name: 'enquiry' },
+  6: { name: 'acknowledge' },
+  7: { name: 'bell (ring)' },
+  8: { name: 'backspace' },
+  9: { name: 'horizontal tab' },
+  10: { name: 'line feed' },
+  11: { name: 'vertical tab' },
+  12: { name: 'form feed' },
+  13: { name: 'carriage return' },
+  14: { name: 'shift out' },
+  15: { name: 'shift in' },
+  16: { name: 'data link escape' },
+  17: { name: 'device control 1' },
+  18: { name: 'device control 2' },
+  19: { name: 'device control 3' },
+  20: { name: 'device control 4' },
+  21: { name: 'negative acknowledge' },
+  22: { name: 'synchronize' },
+  23: { name: 'end transmission block' },
+  24: { name: 'cancel' },
+  25: { name: 'end of medium' },
+  26: { name: 'substitute' },
+  27: { name: 'escape' },
+  28: { name: 'file separator' },
+  29: { name: 'group separator' },
+  30: { name: 'record separator' },
+  31: { name: 'unit separator' },
+  32: { name: 'space' },
+  33: { name: 'exclamation mark' },
+  34: { name: 'quotation mark' },
+  35: { name: 'number sign' },
+  36: { name: 'dollar sign' },
+  37: { name: 'percent sign' },
+  38: { name: 'ampersand' },
+  39: { name: 'apostrophe' },
+  40: { name: 'left parenthesis' },
+  41: { name: 'right parenthesis' },
+  42: { name: 'asterisk' },
+  43: { name: 'plus sign' },
+  44: { name: 'comma' },
+  45: { name: 'hyphen' },
+  46: { name: 'period' },
+  47: { name: 'slash' },
+  48: { name: 'digit 0' },
+  49: { name: 'digit 1' },
+  50: { name: 'digit 2' },
+  51: { name: 'digit 3' },
+  52: { name: 'digit 4' },
+  53: { name: 'digit 5' },
+  54: { name: 'digit 6' },
+  55: { name: 'digit 7' },
+  56: { name: 'digit 8' },
+  57: { name: 'digit 9' },
+  58: { name: 'colon' },
+  59: { name: 'semicolon' },
+  60: { name: 'less-than' },
+  61: { name: 'equals-to' },
+  62: { name: 'greater-than' },
+  63: { name: 'question mark' },
+  64: { name: 'at sign' },
+  65: { name: 'uppercase A' },
+  66: { name: 'uppercase B' },
+  67: { name: 'uppercase C' },
+  68: { name: 'uppercase D' },
+  69: { name: 'uppercase E' },
+  70: { name: 'uppercase F' },
+  71: { name: 'uppercase G' },
+  72: { name: 'uppercase H' },
+  73: { name: 'uppercase I' },
+  74: { name: 'uppercase J' },
+  75: { name: 'uppercase K' },
+  76: { name: 'uppercase L' },
+  77: { name: 'uppercase M' },
+  78: { name: 'uppercase N' },
+  79: { name: 'uppercase O' },
+  80: { name: 'uppercase P' },
+  81: { name: 'uppercase Q' },
+  82: { name: 'uppercase R' },
+  83: { name: 'uppercase S' },
+  84: { name: 'uppercase T' },
+  85: { name: 'uppercase U' },
+  86: { name: 'uppercase V' },
+  87: { name: 'uppercase W' },
+  88: { name: 'uppercase X' },
+  89: { name: 'uppercase Y' },
+  90: { name: 'uppercase Z' },
+  91: { name: 'left square bracket' },
+  92: { name: 'backslash' },
+  93: { name: 'right square bracket' },
+  94: { name: 'caret' },
+  95: { name: 'underscore' },
+  96: { name: 'grave accent' },
+  97: { name: 'lowercase a' },
+  98: { name: 'lowercase b' },
+  99: { name: 'lowercase c' },
+  100: { name: 'lowercase d' },
+  101: { name: 'lowercase e' },
+  102: { name: 'lowercase f' },
+  103: { name: 'lowercase g' },
+  104: { name: 'lowercase h' },
+  105: { name: 'lowercase i' },
+  106: { name: 'lowercase j' },
+  107: { name: 'lowercase k' },
+  108: { name: 'lowercase l' },
+  109: { name: 'lowercase m' },
+  110: { name: 'lowercase n' },
+  111: { name: 'lowercase o' },
+  112: { name: 'lowercase p' },
+  113: { name: 'lowercase q' },
+  114: { name: 'lowercase r' },
+  115: { name: 'lowercase s' },
+  116: { name: 'lowercase t' },
+  117: { name: 'lowercase u' },
+  118: { name: 'lowercase v' },
+  119: { name: 'lowercase w' },
+  120: { name: 'lowercase x' },
+  121: { name: 'lowercase y' },
+  122: { name: 'lowercase z' },
+  123: { name: 'left curly brace' },
+  124: { name: 'vertical bar' },
+  125: { name: 'right curly brace' },
+  126: { name: 'tilde' },
+  127: { name: 'delete (rubout)' }
+}

src/assets/images/body.svg

@@ -0,0 +1,9 @@
+<svg width="74" height="96" viewBox="0 0 74 96" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M42 4L28.8857 0C7.43729 16.4512 1.84318e-05 61.7961 0 96H74C71.7416 62.1085 57.5 24 42 4Z" fill="#C8D4E3"/>
+<mask id="mask0" mask-type="alpha" maskUnits="userSpaceOnUse" x="0" y="0" width="74" height="96">
+<path d="M42 4L28.8857 0C7.43729 16.4512 1.84318e-05 61.7961 0 96H74C71.7416 62.1085 57.5 24 42 4Z" fill="#C8D4E3"/>
+</mask>
+<g mask="url(#mask0)">
+<path d="M32.0001 60.5C38.5001 73 63.5001 76.4999 73.4999 73C73.4999 73 75.7992 60.7994 75.5 60.5002C69.7339 54.7338 43.0003 57.9998 32.0001 60.5Z" fill="#A2B1C6"/>
+</g>
+</svg>

src/assets/images/bottom.svg

@@ -0,0 +1,32 @@
+<svg width="450" height="167" viewBox="0 0 450 167" fill="none" xmlns="http://www.w3.org/2000/svg">
+<mask id="mask0" mask-type="alpha" maskUnits="userSpaceOnUse" x="0" y="0" width="450" height="167">
+<rect width="450" height="167" fill="#C4C4C4"/>
+</mask>
+<g mask="url(#mask0)">
+<path d="M128.207 -169.007C70.1972 -180.849 18.745 -140.11 4.31985 -78.3322C-10.1054 -16.5539 14.3337 15.3318 37.3218 55.1891C72.3784 115.971 181.551 170.237 265.083 166.789C337.517 163.8 389.028 145.514 425.936 77.1107C489.378 -40.4679 417.444 -117.093 325.527 -102.745C214.571 -85.424 213.629 -151.57 128.207 -169.007Z" fill="#DFE8F3"/>
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+<path d="M103.262 130.726H113.253V149.708H103.262V130.726Z" fill="#F3C6BF"/>
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+</g>
+</svg>

src/assets/images/checkbox_checked_disabled.svg

@@ -0,0 +1,17 @@
+<svg width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect x="0.5" y="0.5" width="17" height="17" rx="2.5" fill="#DFE8F3" stroke="#C8D4E3"/>
+<g filter="url(#filter0_d)">
+<path d="M15.75 5.25L6.75 14.25L2.625 10.125L3.6825 9.0675L6.75 12.1275L14.6925 4.1925L15.75 5.25Z" fill="#A2B1C6"/>
+</g>
+<defs>
+<filter id="filter0_d" x="0.625" y="3.1925" width="17.125" height="14.0575" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0"/>
+<feOffset dy="1"/>
+<feGaussianBlur stdDeviation="1"/>
+<feColorMatrix type="matrix" values="0 0 0 0 0.164706 0 0 0 0 0.247059 0 0 0 0 0.372549 0 0 0 0.2 0"/>
+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow"/>
+<feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow" result="shape"/>
+</filter>
+</defs>
+</svg>

src/assets/images/error.svg

@@ -0,0 +1,5 @@
+<svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M9.99984 16.6667C6.32484 16.6667 3.33317 13.675 3.33317 10C3.33317 6.32502 6.32484 3.33335 9.99984 3.33335C13.6748 3.33335 16.6665 6.32502 16.6665 10C16.6665 13.675 13.6748 16.6667 9.99984 16.6667ZM9.99984 1.66669C8.90549 1.66669 7.82186 1.88224 6.81081 2.30102C5.79976 2.71981 4.8811 3.33364 4.10728 4.10746C2.54448 5.67027 1.6665 7.78988 1.6665 10C1.6665 12.2102 2.54448 14.3298 4.10728 15.8926C4.8811 16.6664 5.79976 17.2802 6.81081 17.699C7.82186 18.1178 8.90549 18.3334 9.99984 18.3334C12.21 18.3334 14.3296 17.4554 15.8924 15.8926C17.4552 14.3298 18.3332 12.2102 18.3332 10C18.3332 8.90567 18.1176 7.82204 17.6988 6.81099C17.28 5.79995 16.6662 4.88129 15.8924 4.10746C15.1186 3.33364 14.1999 2.71981 13.1889 2.30102C12.1778 1.88224 11.0942 1.66669 9.99984 1.66669Z" fill="#EF553B"/>
+<rect x="6.36768" y="7.54855" width="1.67" height="8.60363" transform="rotate(-45 6.36768 7.54855)" fill="#EF553B"/>
+<rect x="12.4517" y="6.36771" width="1.67" height="8.60363" transform="rotate(45 12.4517 6.36771)" fill="#EF553B"/>
+</svg>

src/assets/images/leftArm.svg

@@ -0,0 +1,4 @@
+<svg width="114" height="90" viewBox="0 0 114 90" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M96.3828 1.93895C91.4244 0.092814 86.6022 5.62505 85.858 10.6816L97.2851 15.549C100.194 10.5856 101.341 3.78508 96.3828 1.93895Z" fill="#F3C6BF"/>
+<path d="M84.9775 9.12413C75.0653 35.2035 30.7179 46.7359 21.4106 37.7265L14.5359 79.4857C67.7607 86.4912 91.9264 55.4111 99.0973 14.7138L84.9775 9.12413Z" fill="#A2B1C6"/>
+</svg>

src/assets/images/rightArm.svg

@@ -0,0 +1,4 @@
+<svg width="106" height="56" viewBox="0 0 106 56" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M104.252 1.40855C100.262 -2.0494 93.7773 1.40854 91.2832 5.85426L100.262 14.3939C104.751 10.7941 108.243 4.86646 104.252 1.40855Z" fill="#F3C6BF"/>
+<path d="M91.0123 4.37207C72.4568 25.1704 30.4279 22.9263 19.9527 4.37207L0 44.6615C38.409 69.8547 86.7944 50.0954 102.258 14.5286L91.0123 4.37207Z" fill="#C8D4E3"/>
+</svg>

src/assets/images/success.svg

@@ -0,0 +1,5 @@
+<svg width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M10.4998 16.6667C6.82484 16.6667 3.83317 13.675 3.83317 10C3.83317 6.32502 6.82484 3.33335 10.4998 3.33335C14.1748 3.33335 17.1665 6.32502 17.1665 10C17.1665 13.675 14.1748 16.6667 10.4998 16.6667ZM10.4998 1.66669C9.40549 1.66669 8.32186 1.88224 7.31081 2.30102C6.29976 2.71981 5.3811 3.33364 4.60728 4.10746C3.04448 5.67027 2.1665 7.78988 2.1665 10C2.1665 12.2102 3.04448 14.3298 4.60728 15.8926C5.3811 16.6664 6.29976 17.2802 7.31081 17.699C8.32186 18.1178 9.40549 18.3334 10.4998 18.3334C12.71 18.3334 14.8296 17.4554 16.3924 15.8926C17.9552 14.3298 18.8332 12.2102 18.8332 10C18.8332 8.90567 18.6176 7.82204 18.1988 6.81099C17.78 5.79995 17.1662 4.88129 16.3924 4.10746C15.6186 3.33364 14.6999 2.71981 13.6889 2.30102C12.6778 1.88224 11.5942 1.66669 10.4998 1.66669Z" fill="#00CC96"/>
+<rect x="6.09717" y="10.2771" width="1.67" height="4.345" transform="rotate(-45 6.09717 10.2771)" fill="#00CC96"/>
+<rect x="13.752" y="6.97589" width="1.67" height="7.74359" transform="rotate(45 13.752 6.97589)" fill="#00CC96"/>
+</svg>

src/assets/images/top.svg

@@ -0,0 +1,14 @@
+<svg width="450" height="175" viewBox="0 0 450 175" fill="none" xmlns="http://www.w3.org/2000/svg">
+<mask id="mask0" mask-type="alpha" maskUnits="userSpaceOnUse" x="0" y="0" width="450" height="175">
+<rect width="450" height="175" fill="#C4C4C4"/>
+</mask>
+<g mask="url(#mask0)">
+<path d="M128.207 1.99272C70.1972 -9.84897 18.745 30.8895 4.31985 92.6678C-10.1054 154.446 14.3337 186.332 37.3218 226.189C72.3784 286.971 181.551 341.237 265.083 337.789C337.517 334.8 389.028 316.514 425.936 248.111C489.378 130.532 417.444 53.9065 325.527 68.2551C214.571 85.576 213.629 19.4302 128.207 1.99272Z" fill="#DFE8F3"/>
+<path d="M156.284 169.426C158.158 167.553 160.699 166.5 163.349 166.5H331.911C334.561 166.5 337.102 167.553 338.976 169.426L346.041 176.491H149.22L156.284 169.426Z" fill="#C8D4E3"/>
+<path d="M174.099 170.258C174.283 170.09 174.524 169.997 174.773 169.997H318.49C318.739 169.997 318.98 170.09 319.164 170.258V170.258C319.837 170.874 319.402 171.995 318.49 171.995H174.773C173.861 171.995 173.426 170.874 174.099 170.258V170.258Z" fill="#506784"/>
+<path d="M94.227 87.881C94.3962 80.1988 92.5048 65.0608 83.5857 65.9664C83.5857 65.9664 70.5776 76.0877 75.6391 83.6188C80.7005 91.1498 93.4677 94.5083 94.227 87.881Z" fill="#F3C6BF"/>
+<path d="M89.275 91.3105L88 98C85.5023 99.4986 76.5531 99.0196 74.5 95C74.5 95 76.8298 89.9135 77.8446 84.9226L89.275 91.3105Z" fill="#F3C6BF"/>
+<path d="M92.2719 67.1161C92.2719 72.7689 84.2242 68.8872 82.3423 72.9126C80.4605 76.9379 77.3952 86.9208 77.3952 86.9208C72.6323 84.7414 66.7273 69.33 73.2936 65.1034C79.3506 61.2047 92.2719 63.0102 92.2719 67.1161Z" fill="#506784"/>
+<path d="M79.7654 83.9628C75.1522 80.7269 76.371 75.1343 79.7562 76.9534C85.1994 79.8785 81.2934 82.9808 79.7654 83.9628Z" fill="#F3C6BF"/>
+</g>
+</svg>

src/assets/styles/buttons.css

@@ -5,7 +5,6 @@ button {
   font-size: 14px;
   font-weight: 600;
   cursor: pointer;
-  font-family: Open-Sans, Helvetica, Arial, sans-serif;
 }
 
 button:focus {
@@ -28,14 +27,6 @@ button.primary:hover {
   text-shadow: var(--shadow);
 }
 
-button.primary:disabled {
-  background: var(--color-bg-light-2);
-  border: 1px solid var(--color-border);
-  color: var(--color-text-light-2);
-  text-shadow: none;
-  cursor: default;
-}
-
 button.secondary {
   background: white;
   border: 1px solid var(--color-border);
@@ -60,5 +51,13 @@ button.toolbar:hover {
   color: var(--color-accent);
 }
 
+button.primary:disabled,
+button.secondary:disabled {
+  background: var(--color-bg-light-2);
+  border: 1px solid var(--color-border);
+  color: var(--color-text-light-2);
+  text-shadow: none;
+  cursor: default;
+}
 
 

src/assets/styles/tooltips.css

@@ -1,9 +1,8 @@
 .icon-tooltip {
-  visibility: hidden;
   background-color: rgba(80, 103, 132, 0.85);
   color: #fff;
   text-align: center;
-  font-size: 11px;
+  font-size: 12px;
   padding: 0 6px;
   line-height: 19px;;
   position: fixed;

src/assets/styles/variables.css

@@ -20,6 +20,7 @@
   --color-bg-light-3: var(--color-gray-light-5);
   --color-bg-dark: var(--color-gray-dark);
   --color-bg-warning: var(--color-yellow);
+  --color-danger: var(--color-red);
   --color-accent: var(--color-blue-medium);
   --color-accent-shade: var(--color-blue-dark);
   --color-border-light: var(--color-gray-light-2);
@@ -39,5 +40,9 @@
   --border-radius-small: 2px;
 }
 
+.plotly-editor--theme-provider {
+  --sidebar-width: 112px;
+}
+
 
 

src/chart.js

@@ -0,0 +1,40 @@
+import dereference from 'react-chart-editor/lib/lib/dereference'
+
+export function getDataSourcesFromSqlResult (sqlResult) {
+  if (!sqlResult) {
+    return {}
+  }
+  const dataSorces = {}
+  const matrix = sqlResult.values
+  const [row] = matrix
+  const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
+  sqlResult.columns.forEach((column, index) => {
+    dataSorces[column] = transposedMatrix[index]
+  })
+  return dataSorces
+}
+
+export function getOptionsFromDataSources (dataSources) {
+  return Object.keys(dataSources).map(name => ({
+    value: name,
+    label: name
+  }))
+}
+
+export function getChartStateForSave (state, dataSources) {
+  // we don't need to save the data, only settings
+  // so we modify state.data using dereference
+  const stateCopy = JSON.parse(JSON.stringify(state))
+  const emptySources = {}
+  for (const key in dataSources) {
+    emptySources[key] = []
+  }
+  dereference(stateCopy.data, emptySources)
+  return stateCopy
+}
+
+export default {
+  getDataSourcesFromSqlResult,
+  getOptionsFromDataSources,
+  getChartStateForSave
+}

src/components/Chart.vue

@@ -12,10 +12,12 @@
     :dataSourceOptions="dataSourceOptions"
     :plotly="plotly"
     @onUpdate="update"
+    @onRender="go"
     :useResizeHandler="true"
     :debug="true"
     :advancedTraceTypeSelector="true"
     class="chart"
+    ref="plotlyEditor"
     :style="{ height: !sqlResult ? 'calc(100% - 40px)' : '100%' }"
   />
 </div>
@@ -26,6 +28,7 @@ import plotly from 'plotly.js/dist/plotly'
 import 'react-chart-editor/lib/react-chart-editor.min.css'
 
 import PlotlyEditor from 'react-chart-editor'
+import chart from '@/chart'
 import dereference from 'react-chart-editor/lib/lib/dereference'
 
 export default {
@@ -46,23 +49,10 @@ export default {
   },
   computed: {
     dataSources () {
-      if (!this.sqlResult) {
-        return {}
-      }
-      const dataSorces = {}
-      const matrix = this.sqlResult.values
-      const [row] = matrix
-      const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
-      this.sqlResult.columns.forEach((column, index) => {
-        dataSorces[column] = transposedMatrix[index]
-      })
-      return dataSorces
+      return chart.getDataSourcesFromSqlResult(this.sqlResult)
     },
     dataSourceOptions () {
-      return Object.keys(this.dataSources).map(name => ({
-        value: name,
-        label: name
-      }))
+      return chart.getOptionsFromDataSources(this.dataSources)
     }
   },
   watch: {
@@ -73,20 +63,15 @@ export default {
     }
   },
   methods: {
+    go (data, layout, frames) {
+      // TODO: check changes and enable Save button if needed
+    },
     update (data, layout, frames) {
       this.state = { data, layout, frames }
       this.$emit('update')
     },
-    getChartSatateForSave () {
-      // we don't need to save the data, only settings
-      // so we modify state.data using dereference
-      const stateCopy = JSON.parse(JSON.stringify(this.state))
-      const emptySources = {}
-      for (const key in this.dataSources) {
-        emptySources[key] = []
-      }
-      dereference(stateCopy.data, emptySources)
-      return stateCopy
+    getChartStateForSave () {
+      return chart.getChartStateForSave(this.state, this.dataSources)
     }
   }
 }

src/components/CheckBox.vue

@@ -1,20 +1,26 @@
 <template>
-  <div class="checkbox-container" @click.stop="onClick">
+  <div
+    :class="['checkbox-container', { 'checked': checked }, {'disabled': disabled}]"
+    @click.stop="onClick"
+  >
     <div v-show="!checked" class="unchecked" />
     <img
-      v-show="checked && theme === 'accent'"
-      :src="require('@/assets/images/checkbox_checked.svg')"
+      v-show="checked && !disabled"
+      :src="theme === 'light'
+        ? require('@/assets/images/checkbox_checked_light.svg')
+        : require('@/assets/images/checkbox_checked.svg')"
     />
     <img
-      v-show="checked && theme === 'light'"
-      :src="require('@/assets/images/checkbox_checked_light.svg')"
+      v-show="checked && disabled"
+      :src="require('@/assets/images/checkbox_checked_disabled.svg')"
     />
+    <span v-if="label" class="label">{{ label }}</span>
   </div>
 </template>
 
 <script>
 export default {
-  name: 'checkBox',
+  name: 'CheckBox',
   props: {
     theme: {
       type: String,
@@ -28,6 +34,16 @@ export default {
       type: Boolean,
       required: false,
       default: false
+    },
+    label: {
+      type: String,
+      required: false,
+      default: ''
+    },
+    disabled: {
+      type: Boolean,
+      required: false,
+      default: false
     }
   },
   data () {
@@ -37,8 +53,10 @@ export default {
   },
   methods: {
     onClick () {
-      this.checked = !this.checked
-      this.$emit('click', this.checked)
+      if (!this.disabled) {
+        this.checked = !this.checked
+        this.$emit('click', this.checked)
+      }
     }
   }
 }
@@ -46,7 +64,7 @@ export default {
 
 <style scoped>
 .checkbox-container {
-  display: inline-block;
+  display: inline-flex;
   cursor: pointer;
 }
 .unchecked {
@@ -64,4 +82,24 @@ export default {
 img {
     display: block;
 }
+.label {
+  margin-left: 6px;
+  color: var(--color-text-base);
+}
+.checked .label {
+  color: var(--color-text-active);
+}
+
+.disabled.checkbox-container {
+  cursor: default;
+}
+
+.disabled .label {
+  color: var(--color-text-light-2);
+}
+
+.disabled .unchecked,
+.disabled .unchecked:hover {
+  background-color:  var(--color-bg-light-2);
+}
 </style>

src/components/DbUpload.vue

@@ -1,199 +0,0 @@
-<template>
-  <div class="db-upload-container">
-    <label for="assetsFieldHandle">
-      <div
-        class="drop-area"
-        @dragover.prevent="state = 'dragover'"
-        @dragleave.prevent="state=''"
-        @drop.prevent="drop"
-      >
-        <input
-          type="file"
-          id="assetsFieldHandle"
-          @change="loadDb"
-          ref="file"
-          accept=".db,.sqlite,.sqlite3"
-        />
-        <div class="text">
-          Drop the database file here or click to choose a file from your computer.
-        </div>
-      </div>
-    </label>
-    <div v-if="illustrated" id="img-container">
-      <img id="drop-file-top-img" :src="require('@/assets/images/dropFileTop.png')" />
-      <img
-        id="left-arm-img"
-        :class="{'swing': state === 'dragover'}"
-        :src="require('@/assets/images/leftArm.png')"
-      />
-      <img
-        id="file-img"
-        ref="fileImg"
-        :class="{
-          'swing': state === 'dragover',
-          'fly': state === 'drop'
-        }"
-        :src="require('@/assets/images/file.png')"
-      />
-      <img id="drop-file-bottom-img" :src="require('@/assets/images/dropFileBottom.png')" />
-      <img id="body-img" :src="require('@/assets/images/body.png')" />
-      <img
-        id="right-arm-img"
-        :class="{'swing': state === 'dragover'}"
-        :src="require('@/assets/images/rightArm.png')"
-      />
-    </div>
-    <div id="error" class="error"></div>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'DbUpload',
-  props: {
-    illustrated: {
-      type: Boolean,
-      required: false,
-      default: false
-    }
-  },
-  data () {
-    return {
-      state: '',
-      animationPromise: Promise.resolve()
-    }
-  },
-  mounted () {
-    if (this.illustrated) {
-      this.animationPromise = new Promise((resolve) => {
-        this.$refs.fileImg.addEventListener('animationend', event => {
-          if (event.animationName.startsWith('fly')) {
-            resolve()
-          }
-        })
-      })
-    }
-  },
-  methods: {
-    loadDb () {
-      this.state = 'drop'
-      return Promise.all([this.$db.loadDb(this.$refs.file.files[0]), this.animationPromise])
-        .then(([schema]) => {
-          this.$store.commit('saveSchema', schema)
-          if (this.$route.path !== '/editor') {
-            this.$router.push('/editor')
-          }
-        })
-    },
-    drop (event) {
-      this.$refs.file.files = event.dataTransfer.files
-      this.loadDb()
-    }
-  }
-}
-</script>
-
-<style scoped>
-label {
-  display: inline-block;
-  border: 1px dashed var(--color-border);
-  padding: 8px;
-  border-radius: var(--border-radius-big);
-  height: 100%;
-  width: 100%;
-  box-sizing: border-box;
-}
-
-.drop-area {
-  background-color: var(--color-bg-light-3);
-  border-radius: var(--border-radius-big);
-  color: var(--color-text-base);
-  font-size: 13px;
-  text-align: center;
-  box-sizing: border-box;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  height: 100%;
-}
-
-input {
-  display: none;
-}
-
-#img-container {
-  position: absolute;
-  top: calc(50% - 120px);
-  left: 50%;
-  transform: translate(-50%, -50%);
-  width: 450px;
-  height: 338px;
-  pointer-events: none;
-}
-#drop-file-top-img {
-  width: 450px;
-  height: 171px;
-  position: absolute;
-  top: 0;
-  left: 0;
-}
-#drop-file-bottom-img {
-  width: 450px;
-  height: 167px;
-  position: absolute;
-  bottom: 0;
-  left: 0;
-}
-#body-img {
-  width: 74px;
-  position: absolute;
-  top: 94.05px;
-  left: 46px;
-}
-#right-arm-img {
-  width: 106px;
-  position: absolute;
-  top: 110.05px;
-  left: 78px;
-}
-#left-arm-img {
-  width: 114px;
-  position: absolute;
-  top: 69.05px;
-  left: 69px;
-}
-#file-img {
-  width: 125px;
-  position: absolute;
-  top: 15.66px;
-  left: 152px;
-}
-
-.swing {
-  animation: swing ease-in-out 0.6s infinite alternate;
-}
-#left-arm-img.swing {
-  transform-origin: 9px 83px;
-}
-#right-arm-img.swing {
-  transform-origin: 0 56px;
-}
-#file-img.swing {
-   transform-origin: -74px 139px;
-}
-@keyframes swing {
-  0% { transform: rotate(0deg); }
-  100% { transform: rotate(-7deg); }
-}
-
-#file-img.fly {
-  animation: fly ease-in-out 1s 1 normal;
-  transform-origin: center center;
-  top: 183px;
-  left: 225px;
-  transition: top 1s ease-in-out, left 1s ease-in-out;
-}
-@keyframes fly {
-  100% { transform: rotate(360deg) scale(0.5); }
-}
-</style>

src/components/DbUploader.vue

@@ -0,0 +1,528 @@
+<template>
+  <div class="db-uploader-container">
+    <change-db-icon v-if="type === 'small'" @click.native="browse"/>
+    <div v-if="['regular', 'illustrated'].includes(type)" class="drop-area-container">
+      <div
+        class="drop-area"
+        @dragover.prevent="state = 'dragover'"
+        @dragleave.prevent="state=''"
+        @drop.prevent="drop"
+        @click="browse"
+      >
+        <div class="text">
+          Drop the database or CSV file here or click to choose a file from your computer.
+        </div>
+      </div>
+    </div>
+    <div v-if="type === 'illustrated'" id="img-container">
+      <img id="drop-file-top-img" :src="require('@/assets/images/top.svg')" />
+      <img
+        id="left-arm-img"
+        :class="{'swing': state === 'dragover'}"
+        :src="require('@/assets/images/leftArm.svg')"
+      />
+      <img
+        id="file-img"
+        ref="fileImg"
+        :class="{
+          'swing': state === 'dragover',
+          'fly': state === 'drop'
+        }"
+        :src="require('@/assets/images/file.png')"
+      />
+      <img id="drop-file-bottom-img" :src="require('@/assets/images/bottom.svg')" />
+      <img id="body-img" :src="require('@/assets/images/body.svg')" />
+      <img
+        id="right-arm-img"
+        :class="{'swing': state === 'dragover'}"
+        :src="require('@/assets/images/rightArm.svg')"
+      />
+    </div>
+    <div id="error" class="error"></div>
+
+    <!--Parse csv dialog  -->
+    <modal name="parse" classes="dialog" height="auto" width="60%" :clickToClose="false">
+      <div class="dialog-header">
+        Import CSV
+        <close-icon @click="cancelCsvImport" :disabled="disableDialog"/>
+      </div>
+      <div class="dialog-body">
+        <div class="chars">
+          <delimiter-selector
+            v-model="delimiter"
+            width="210px"
+            class="char-input"
+            @input="previewCSV"
+            :disabled="disableDialog"
+          />
+          <text-field
+            label="Quote char"
+            hint="The character used to quote fields."
+            v-model="quoteChar"
+            width="93px"
+            :disabled="disableDialog"
+            class="char-input"
+            id="quote-char"
+          />
+          <text-field
+            label="Escape char"
+            hint='The character used to escape the quote character within a field (e.g. "column with ""quotes"" in text").'
+            max-hint-width="242px"
+            v-model="escapeChar"
+            width="93px"
+            :disabled="disableDialog"
+            class="char-input"
+            id="escape-char"
+          />
+        </div>
+        <check-box
+          @click="header = $event"
+          :init="true"
+          label="Use first row as column headers"
+          :disabled="disableDialog"
+        />
+        <sql-table
+          v-if="previewData"
+          :data-set="previewData"
+          height="160"
+          class="preview-table"
+          :preview="true"
+        />
+        <div v-if="!previewData" class="no-data">No data</div>
+        <logs
+          class="import-csv-errors"
+          :messages="importCsvMessages"
+        />
+      </div>
+      <div class="dialog-buttons-container">
+        <button
+          class="secondary"
+          :disabled="disableDialog"
+          @click="cancelCsvImport"
+          id="csv-cancel"
+        >
+          Cancel
+        </button>
+        <button
+          v-show="!importCsvCompleted"
+          class="primary"
+          :disabled="disableDialog"
+          @click="loadFromCsv(file)"
+          id="csv-import"
+        >
+          Import
+        </button>
+        <button
+          v-show="importCsvCompleted"
+          class="primary"
+          :disabled="disableDialog"
+          @click="finish"
+          id="csv-finish"
+        >
+          Finish
+        </button>
+      </div>
+    </modal>
+  </div>
+</template>
+
+<script>
+import fu from '@/file.utils'
+import csv from '@/csv'
+import CloseIcon from '@/components/svg/close'
+import TextField from '@/components/TextField'
+import DelimiterSelector from '@/components/DelimiterSelector'
+import CheckBox from '@/components/CheckBox'
+import SqlTable from '@/components/SqlTable'
+import Logs from '@/components/Logs'
+import ChangeDbIcon from '@/components/svg/changeDb'
+import time from '@/time'
+import database from '@/database'
+
+export default {
+  name: 'DbUploader',
+  props: {
+    type: {
+      type: String,
+      required: false,
+      default: 'regular',
+      validator: (value) => {
+        return ['regular', 'illustrated', 'small'].includes(value)
+      }
+    }
+  },
+  components: {
+    ChangeDbIcon,
+    TextField,
+    DelimiterSelector,
+    CloseIcon,
+    CheckBox,
+    SqlTable,
+    Logs
+  },
+  data () {
+    return {
+      state: '',
+      animationPromise: Promise.resolve(),
+      file: null,
+      schema: null,
+      delimiter: '',
+      quoteChar: '"',
+      escapeChar: '"',
+      header: true,
+      previewData: null,
+      importCsvMessages: [],
+      disableDialog: false,
+      importCsvCompleted: false,
+      newDb: null
+    }
+  },
+  mounted () {
+    if (this.type === 'illustrated') {
+      this.animationPromise = new Promise((resolve) => {
+        this.$refs.fileImg.addEventListener('animationend', event => {
+          if (event.animationName.startsWith('fly')) {
+            resolve()
+          }
+        })
+      })
+    }
+  },
+  watch: {
+    quoteChar () {
+      this.previewCSV()
+    },
+
+    escapeChar () {
+      this.previewCSV()
+    },
+
+    header () {
+      this.previewCSV()
+    }
+  },
+  methods: {
+    cancelCsvImport () {
+      if (!this.disableDialog) {
+        this.$modal.hide('parse')
+        if (this.newDb) {
+          this.newDb.shutDown()
+          this.newDb = null
+        }
+      }
+    },
+
+    async finish () {
+      this.$store.commit('setDb', this.newDb)
+      this.$store.commit('saveSchema', this.schema)
+      if (this.importCsvCompleted) {
+        this.$modal.hide('parse')
+        const tabId = await this.$store.dispatch('addTab', { query: 'select * from csv_import' })
+        this.$store.commit('setCurrentTabId', tabId)
+      }
+      if (this.$route.path !== '/editor') {
+        this.$router.push('/editor')
+      }
+    },
+
+    async previewCSV () {
+      this.importCsvCompleted = false
+      const config = {
+        preview: 3,
+        quoteChar: this.quoteChar || '"',
+        escapeChar: this.escapeChar,
+        header: this.header,
+        delimiter: this.delimiter
+      }
+      try {
+        const start = new Date()
+        const parseResult = await csv.parse(this.file, config)
+        const end = new Date()
+        this.previewData = parseResult.data
+        this.delimiter = parseResult.delimiter
+
+        // In parseResult.messages we can get parse errors
+        this.importCsvMessages = parseResult.messages || []
+
+        if (!parseResult.hasErrors) {
+          this.importCsvMessages.push({
+            message: `Preview parsing is completed in ${time.getPeriod(start, end)}.`,
+            type: 'success'
+          })
+        }
+      } catch (err) {
+        this.importCsvMessages = [{
+          message: err,
+          type: 'error'
+        }]
+      }
+    },
+
+    loadDb (file) {
+      this.newDb = database.getNewDatabase()
+      return Promise.all([this.newDb.loadDb(file), this.animationPromise])
+        .then(([schema]) => {
+          this.schema = schema
+          this.finish()
+        })
+    },
+
+    async loadFromCsv (file) {
+      this.disableDialog = true
+      const config = {
+        quoteChar: this.quoteChar || '"',
+        escapeChar: this.escapeChar,
+        header: this.header,
+        delimiter: this.delimiter
+      }
+      const parseCsvMsg = {
+        message: 'Parsing CSV...',
+        type: 'info'
+      }
+      this.importCsvMessages.push(parseCsvMsg)
+      const parseCsvLoadingIndicator = setTimeout(() => { parseCsvMsg.type = 'loading' }, 1000)
+
+      const importMsg = {
+        message: 'Importing CSV into a SQLite database...',
+        type: 'info'
+      }
+      let importLoadingIndicator = null
+
+      const updateProgress = progress => {
+        this.$set(importMsg, 'progress', progress)
+      }
+      this.newDb = database.getNewDatabase()
+      const progressCounterId = this.newDb.createProgressCounter(updateProgress)
+
+      try {
+        let start = new Date()
+        const parseResult = await csv.parse(this.file, config)
+        let end = new Date()
+
+        if (!parseResult.hasErrors) {
+          const rowCount = parseResult.data.values.length
+          let period = time.getPeriod(start, end)
+          parseCsvMsg.type = 'success'
+
+          if (parseResult.messages.length > 0) {
+            this.importCsvMessages = this.importCsvMessages.concat(parseResult.messages)
+            parseCsvMsg.message = `${rowCount} rows are parsed in ${period}.`
+          } else {
+            // Inform about csv parsing success
+            parseCsvMsg.message = `${rowCount} rows are parsed successfully in ${period}.`
+          }
+
+          // Loading indicator for csv parsing is not needed anymore
+          clearTimeout(parseCsvLoadingIndicator)
+
+          // Add info about import start
+          this.importCsvMessages.push(importMsg)
+
+          // Show import progress after 1 second
+          importLoadingIndicator = setTimeout(() => {
+            importMsg.type = 'loading'
+          }, 1000)
+
+          // Create db with csv table and get schema
+          start = new Date()
+          this.schema = await this.newDb.createDb(file.name, parseResult.data, progressCounterId)
+          end = new Date()
+
+          // Inform about import success
+          period = time.getPeriod(start, end)
+          importMsg.message = `Importing CSV into a SQLite database is completed in ${period}.`
+          importMsg.type = 'success'
+
+          // Loading indicator for import is not needed anymore
+          clearTimeout(importLoadingIndicator)
+
+          this.importCsvCompleted = true
+        } else {
+          parseCsvMsg.message = 'Parsing ended with errors.'
+          parseCsvMsg.type = 'info'
+          this.importCsvMessages = this.importCsvMessages.concat(parseResult.messages)
+        }
+      } catch (err) {
+        if (parseCsvMsg.type === 'loading') {
+          parseCsvMsg.type = 'info'
+        }
+
+        if (importMsg.type === 'loading') {
+          importMsg.type = 'info'
+        }
+
+        this.importCsvMessages.push({
+          message: err,
+          type: 'error'
+        })
+      }
+
+      clearTimeout(parseCsvLoadingIndicator)
+      clearTimeout(importLoadingIndicator)
+      this.newDb.deleteProgressCounter(progressCounterId)
+      this.disableDialog = false
+    },
+
+    async checkFile (file) {
+      this.state = 'drop'
+      if (file.type === 'text/csv') {
+        this.file = file
+        this.header = true
+        this.quoteChar = '"'
+        this.escapeChar = '"'
+        this.delimiter = ''
+        return Promise.all([this.previewCSV(), this.animationPromise])
+          .then(() => {
+            this.$modal.show('parse')
+          })
+      } else {
+        this.loadDb(file)
+      }
+    },
+    browse () {
+      fu.getFileFromUser('.db,.sqlite,.sqlite3,.csv')
+        .then(this.checkFile)
+    },
+
+    drop (event) {
+      this.checkFile(event.dataTransfer.files[0])
+    }
+  }
+}
+</script>
+
+<style scoped>
+.db-uploader-container {
+  position: relative;
+}
+.drop-area-container {
+  display: inline-block;
+  border: 1px dashed var(--color-border);
+  padding: 8px;
+  border-radius: var(--border-radius-big);
+  height: 100%;
+  width: 100%;
+  box-sizing: border-box;
+}
+
+.drop-area {
+  background-color: var(--color-bg-light-3);
+  border-radius: var(--border-radius-big);
+  color: var(--color-text-base);
+  font-size: 13px;
+  text-align: center;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+}
+
+#img-container {
+  position: absolute;
+  top: 54px;
+  left: 50%;
+  transform: translate(-50%, 0);
+  width: 450px;
+  height: 338px;
+  pointer-events: none;
+}
+
+#drop-file-top-img {
+  width: 450px;
+  height: 175px;
+  position: absolute;
+  top: 0;
+  left: 0;
+}
+#drop-file-bottom-img {
+  width: 450px;
+  height: 167px;
+  position: absolute;
+  bottom: 0;
+  left: 0;
+}
+#body-img {
+  width: 74px;
+  position: absolute;
+  top: 94.05px;
+  left: 46px;
+}
+#right-arm-img {
+  width: 106px;
+  position: absolute;
+  top: 110.05px;
+  left: 78px;
+}
+#left-arm-img {
+  width: 114px;
+  position: absolute;
+  top: 69.05px;
+  left: 69px;
+}
+#file-img {
+  width: 125px;
+  position: absolute;
+  top: 15.66px;
+  left: 152px;
+}
+
+.swing {
+  animation: swing ease-in-out 0.6s infinite alternate;
+}
+#left-arm-img.swing {
+  transform-origin: 9px 83px;
+}
+#right-arm-img.swing {
+  transform-origin: 0 56px;
+}
+#file-img.swing {
+   transform-origin: -74px 139px;
+}
+@keyframes swing {
+  0% { transform: rotate(0deg); }
+  100% { transform: rotate(-7deg); }
+}
+
+#file-img.fly {
+  animation: fly ease-in-out 1s 1 normal;
+  transform-origin: center center;
+  top: 183px;
+  left: 225px;
+  transition: top 1s ease-in-out, left 1s ease-in-out;
+}
+@keyframes fly {
+  100% { transform: rotate(360deg) scale(0.5); }
+}
+/* Parse CSV dialog */
+.chars {
+  display: flex;
+  align-items: flex-end;
+  margin-bottom: 20px;
+}
+.char-input {
+  margin-right: 44px;
+}
+.preview-table {
+  margin-top: 32px;
+}
+
+.import-csv-errors {
+  height: 160px;
+  margin-top: 32px;
+}
+.no-data {
+  margin-top: 32px;
+  background-color: white;
+  border-radius: 5px;
+  position: relative;
+  border: 1px solid var(--color-border-light);
+  box-sizing: border-box;
+  height: 160px;
+  font-size: 13px;
+  color: var(--color-text-base);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+</style>

src/components/DelimiterSelector.vue

@@ -0,0 +1,204 @@
+<template>
+  <div :class="{ 'disabled': disabled }">
+    <div class="text-field-label">Delimiter</div>
+    <div
+      class="delimiter-selector-container"
+      :style="{ width: width }"
+      @click="onContainerClick"
+    >
+      <div class="value">
+        <input
+          :class="{ 'filled': filled }"
+          ref="delimiterInput"
+          type="text"
+          maxlength="1"
+          v-model="inputValue"
+          @click.stop
+          :disabled="disabled"
+        />
+        <div class="name">{{ getSymbolName(value) }}</div>
+      </div>
+      <div class="controls" @click.stop>
+        <clear-icon @click.native="clear" :disabled="disabled"/>
+        <drop-down-chevron
+          :disabled="disabled"
+          @click.native="!disabled && (showOptions = !showOptions)"
+        />
+      </div>
+    </div>
+    <div v-show="showOptions" class="options" :style="{ width: width }">
+      <div
+        v-for="(option, index) in options"
+        :key="index"
+        @click="chooseOption(option)"
+        class="option"
+      >
+        <pre>{{option}}</pre><div>{{ getSymbolName(option) }}</div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+import ascii from '@/ascii'
+import DropDownChevron from '@/components/svg/dropDownChevron'
+import ClearIcon from '@/components/svg/clear'
+
+export default {
+  name: 'DelimiterSelector',
+  props: ['value', 'width', 'disabled'],
+  components: { DropDownChevron, ClearIcon },
+  data () {
+    return {
+      showOptions: false,
+      options: [',', '\t', ' ', '|', ';', '\u001F', '\u001E'],
+      filled: false,
+      inputValue: ''
+    }
+  },
+  watch: {
+    inputValue () {
+      if (this.inputValue) {
+        this.filled = true
+        if (this.inputValue !== this.value) {
+          this.$emit('input', this.inputValue)
+        }
+      } else {
+        this.filled = false
+      }
+    }
+  },
+  created () {
+    this.inputValue = this.value
+  },
+  methods: {
+    getSymbolName (str) {
+      if (!str) {
+        return ''
+      }
+      return ascii[str.charCodeAt(0).toString()].name
+    },
+    chooseOption (option) {
+      this.inputValue = option
+      this.showOptions = false
+    },
+    onContainerClick (event) {
+      this.$refs.delimiterInput.focus()
+    },
+
+    clear () {
+      if (!this.disabled) {
+        this.inputValue = ''
+        this.$refs.delimiterInput.focus()
+      }
+    }
+  }
+}
+</script>
+
+<style scoped>
+.delimiter-selector-container {
+  background: var(--color-white);
+  border: 1px solid var(--color-border);
+  border-radius: var(--border-radius-medium-2);
+  height: 36px;
+  padding: 0 8px;
+  font-size: 12px;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.value {
+  display: flex;
+  align-items: center;
+}
+
+.value .name {
+  color: var(--color-text-light-2);
+  cursor: default;
+  margin-left: 4px;
+}
+
+.controls {
+  display: flex;
+  align-items: center;
+}
+
+.options {
+  background: var(--color-white);
+  border: 1px solid var(--color-border);
+  border-width: 0 1px 1px 1px;
+  color: var(--color-text-base);
+  border-radius: var(--border-radius-medium-2);
+  font-size: 12px;
+  box-sizing: border-box;
+  position: absolute;
+  z-index: 2;
+}
+
+.option {
+  display: flex;
+  align-items: center;
+  height: 24px;
+  padding: 0 6px;
+}
+
+.option:hover {
+  background-color: var(--color-bg-light);
+  color: var(--color-text-active);
+  cursor: pointer;
+}
+
+.option pre {
+  background-color: var(--color-bg-warning);
+  line-height: 20px;
+  margin-right: 6px;
+  tab-size: 1;
+  font-family: monospace;
+  width: 16px;
+  text-align: center;
+}
+
+input {
+  background: var(--color-white);
+  border: none;
+  color: var(--color-text-base);
+  height: 20px;
+  font-family: monospace;
+  font-size: 12px;
+  box-sizing: border-box;
+  width: 16px;
+  text-align: center;
+}
+
+input.filled {
+  background: var(--color-bg-warning);
+}
+
+input:focus {
+  outline: none;
+}
+
+input:disabled {
+  background: var(--color-bg-light);
+  color: var(--color-text-light-2);
+  cursor: default;
+}
+
+.text-field-label {
+  font-size: 12px;
+  color: var(--color-text-base);
+  padding-left: 8px;
+  margin-bottom: 2px;
+}
+
+.disabled .text-field-label {
+  color: var(--color-text-light-2);
+}
+
+.disabled .delimiter-selector-container {
+  background: var(--color-bg-light);
+}
+</style>

src/components/LoadingIndicator.vue

@@ -0,0 +1,92 @@
+<template>
+  <svg :class="['svg-container', animationClass ]" height="20" width="20" viewBox="0 0 20 20">
+    <circle
+      class="loader-svg bg"
+      cx="10"
+      cy="10"
+      r="8"
+    />
+    <circle
+      class="loader-svg front"
+      :style="{ strokeDasharray: circleProgress }"
+      cx="10"
+      cy="10"
+      r="8"
+    />
+  </svg>
+</template>
+
+<script>
+export default {
+  name: 'LoadingIndicator',
+  props: ['progress'],
+  computed: {
+    circleProgress () {
+      const dash = (50.24 * this.progress) / 100
+      const space = 50.24 - dash
+      return `${dash}, ${space}`
+    },
+    animationClass () {
+      return this.progress === undefined ? 'loading' : 'progress'
+    }
+  }
+}
+</script>
+
+<style scoped>
+.loader-svg {
+  position: absolute;
+  left: 0; right: 0; top: 0; bottom: 0;
+  fill: none;
+  stroke-width: 2px;
+  stroke-linecap: round;
+  stroke: var(--color-accent);
+}
+
+.loader-svg.bg {
+  stroke: var(--color-gray-light-3);
+}
+
+.loading .loader-svg.front {
+  stroke-dasharray: 40.24;
+  animation: fill-animation-loading 1s cubic-bezier(1,1,1,1) 0s infinite;
+}
+
+@keyframes fill-animation-loading {
+  0% {
+    stroke-dasharray: 10 40.24;
+    stroke-dashoffset: 0;
+  }
+  50% {
+    stroke-dasharray: 25.12;
+    stroke-dashoffset: 25.12;
+  }
+  100% {
+    stroke-dasharray: 10 40.24 ;
+    stroke-dashoffset: 50.24;
+  }
+}
+
+.progress .loader-svg.front {
+  stroke-dashoffset: 12.56;
+  transition: stroke-dasharray 0.2s;
+}
+
+.progress .loader-svg.bg {
+  animation: bg-animation 1.5s cubic-bezier(1,1,1,1) 0s infinite;
+}
+
+@keyframes bg-animation{
+  0% {
+    r: 8;
+  }
+  50% {
+    stroke: var(--color-gray-light-2);
+    r: 9;
+  }
+  100% {
+   r: 8;
+  }
+}
+
+</style>

src/components/Logs.vue

@@ -0,0 +1,84 @@
+<template>
+  <div class="logs-container" ref="logsContainer">
+    <div v-for="(msg, index) in messages" :key="index" class="msg">
+      <img v-if="msg.type === 'error'" :src="require('@/assets/images/error.svg')">
+      <img v-if="msg.type === 'info'" :src="require('@/assets/images/info.svg')" width="20px">
+      <img v-if="msg.type === 'success'" :src="require('@/assets/images/success.svg')">
+      <loading-indicator v-if="msg.type === 'loading'" :progress="msg.progress" />
+      <span class="msg-text">{{ serializeMessage(msg) }}</span>
+    </div>
+  </div>
+</template>
+
+<script>
+import LoadingIndicator from '@/components/LoadingIndicator'
+
+export default {
+  name: 'logs',
+  props: ['messages'],
+  components: { LoadingIndicator },
+  watch: {
+    'messages.length': 'scrollToBottom'
+  },
+  mounted () {
+    this.scrollToBottom()
+  },
+  methods: {
+    async scrollToBottom () {
+      const container = this.$refs.logsContainer
+      if (container) {
+        await this.$nextTick()
+        container.scrollTop = container.scrollHeight
+      }
+    },
+
+    serializeMessage (msg) {
+      let result = ''
+      if (msg.row !== null && msg.row !== undefined) {
+        if (msg.type === 'error') {
+          result += `Error in row ${msg.row}. `
+        } else {
+          result += `Information about row ${msg.row}. `
+        }
+      }
+
+      result += msg.message
+      if (!(/(\.|!|\?)$/.test(result))) {
+        result += '.'
+      }
+
+      if (msg.hint) {
+        result += ` ${msg.hint}`
+      }
+      return result
+    }
+  }
+}
+</script>
+
+<style scoped>
+.logs-container {
+  background-color: var(--color-white);
+  padding: 0 5px;
+  border-radius: 5px;
+  border: 1px solid var(--color-border-light);
+  box-sizing: border-box;
+  overflow-y: scroll;
+}
+.msg {
+  padding: 16px 7px;
+  border-bottom: 1px solid var(--color-border-light);
+  display: flex;
+  align-items: flex-start;
+  font-family: monospace;
+}
+
+.msg:last-child {
+  border-bottom: none;
+}
+
+.msg-text {
+  margin-left: 6px;
+  margin-top: 2px;
+}
+</style>

src/components/MainMenu.vue

@@ -6,29 +6,37 @@
     </div>
     <div>
       <button
-        v-if="currentQuery"
+        id="run-btn"
+        v-if="currentQuery && $route.path === '/editor'"
         class="primary"
-        :disabled="currentQuery && (!$store.state.schema || !currentQuery.query)"
+        :disabled="runDisabled"
         @click="currentQuery.execute"
       >
         Run
       </button>
       <button
-        v-if="currentQuery"
+        id="save-btn"
+        v-show="currentQuery && $route.path === '/editor'"
         class="primary"
-        :disabled="currentQuery && !currentQuery.isUnsaved"
+        :disabled="!isUnsaved"
         @click="checkQueryBeforeSave"
       >
         Save
       </button>
-      <button class="primary" @click="createNewQuery">Create</button>
+      <button
+        id="create-btn"
+        class="primary"
+        @click="createNewQuery"
+      >
+        Create
+      </button>
     </div>
 
     <!--Save Query dialog  -->
     <modal name="save" classes="dialog" height="auto">
       <div class="dialog-header">
         Save query
-        <close-icon @click="$modal.hide('save')"/>
+        <close-icon @click="cancelSave"/>
       </div>
       <div class="dialog-body">
         <div v-show="isPredefined" id="save-note">
@@ -44,7 +52,7 @@
         />
       </div>
       <div class="dialog-buttons-container">
-        <button class="secondary" @click="$modal.hide('save')">Cancel</button>
+        <button class="secondary" @click="cancelSave">Cancel</button>
         <button class="primary" @click="saveQuery">Save</button>
       </div>
     </modal>
@@ -52,9 +60,9 @@
 </template>
 
 <script>
-import { nanoid } from 'nanoid'
 import TextField from '@/components/TextField'
 import CloseIcon from '@/components/svg/close'
+import storedQueries from '@/storedQueries'
 
 export default {
   name: 'MainMenu',
@@ -72,72 +80,69 @@ export default {
     currentQuery () {
       return this.$store.state.currentTab
     },
+    isUnsaved () {
+      if (!this.currentQuery) {
+        return false
+      }
+      const tabIndex = this.currentQuery.tabIndex
+      const tab = this.$store.state.tabs[tabIndex]
+      return tab && tab.isUnsaved
+    },
     isPredefined () {
       if (this.currentQuery) {
         return this.currentQuery.isPredefined
       } else {
         return false
       }
+    },
+    runDisabled () {
+      return this.currentQuery && (!this.$store.state.schema || !this.currentQuery.query)
     }
   },
   created () {
     this.$root.$on('createNewQuery', this.createNewQuery)
+    this.$root.$on('saveQuery', this.checkQueryBeforeSave)
+    document.addEventListener('keydown', this._keyListener)
+  },
+  beforeDestroy () {
+    document.removeEventListener('keydown', this._keyListener)
   },
   methods: {
     createNewQuery () {
-      const tab = {
-        id: nanoid(),
-        name: null,
-        tempName: this.$store.state.untitledLastIndex
-          ? `Untitled ${this.$store.state.untitledLastIndex}`
-          : 'Untitled',
-        isUnsaved: true
-      }
-      this.$store.commit('addTab', tab)
-      this.$store.commit('setCurrentTabId', tab.id)
+      this.$store.dispatch('addTab').then(id => {
+        this.$store.commit('setCurrentTabId', id)
+        if (this.$route.path !== '/editor') {
+          this.$router.push('/editor')
+        }
+      })
+    },
+    cancelSave () {
+      this.$modal.hide('save')
+      this.$root.$off('querySaved')
     },
     checkQueryBeforeSave () {
       this.errorMsg = null
-      const isFromScratch = !this.currentQuery.initName
+      this.name = ''
 
-      if (isFromScratch || this.isPredefined) {
-        this.name = ''
+      if (storedQueries.isTabNeedName(this.currentQuery)) {
         this.$modal.show('save')
       } else {
         this.saveQuery()
       }
     },
     saveQuery () {
-      const isFromScratch = !this.currentQuery.initName
-      if ((isFromScratch || this.isPredefined) && !this.name) {
+      const isNeedName = storedQueries.isTabNeedName(this.currentQuery)
+      if (isNeedName && !this.name) {
         this.errorMsg = 'Query name can\'t be empty'
         return
       }
       const dataSet = this.currentQuery.result
       const tabView = this.currentQuery.view
-      // Prepare query
-      const value = {
-        id: this.isPredefined ? nanoid() : this.currentQuery.id,
-        query: this.currentQuery.query,
-        chart: this.currentQuery.getChartSatateForSave(),
-        name: (!this.isPredefined && this.currentQuery.initName) || this.name,
-        createdAt: new Date()
-      }
 
       // Save query
-      let myQueries = JSON.parse(localStorage.getItem('myQueries'))
-      if (!myQueries) {
-        myQueries = [value]
-      } else if (isFromScratch || this.isPredefined) {
-        myQueries.push(value)
-      } else {
-        const queryIndex = myQueries.findIndex(query => query.id === this.currentQuery.id)
-        value.createdAt = myQueries[queryIndex].createdAt
-        myQueries[queryIndex] = value
-      }
-      localStorage.setItem('myQueries', JSON.stringify(myQueries))
+      const value = storedQueries.save(this.currentQuery, this.name)
 
-      // Update tab
+      // Update tab in store
       this.$store.commit('updateTab', {
         index: this.currentQuery.tabIndex,
         name: value.name,
@@ -159,6 +164,35 @@ export default {
 
       // Hide dialog
       this.$modal.hide('save')
+
+      // Signal about saving
+      this.$root.$emit('querySaved')
+    },
+    _keyListener (e) {
+      if (this.$route.path === '/editor') {
+        // Run query Ctrl+R or Ctrl+Enter
+        if ((e.key === 'r' || e.key === 'Enter') && (e.ctrlKey || e.metaKey)) {
+          e.preventDefault()
+          if (!this.runDisabled) {
+            this.currentQuery.execute()
+          }
+          return
+        }
+
+        // Save query Ctrl+S
+        if (e.key === 's' && (e.ctrlKey || e.metaKey)) {
+          e.preventDefault()
+          if (this.isUnsaved) {
+            this.checkQueryBeforeSave()
+          }
+          return
+        }
+      }
+      // New (blank) query Ctrl+B
+      if (e.key === 'b' && (e.ctrlKey || e.metaKey)) {
+        e.preventDefault()
+        this.createNewQuery()
+      }
     }
   }
 }

src/components/Schema.vue

@@ -5,30 +5,12 @@
     </div>
     <div id="db">
       <div @click="schemaVisible = !schemaVisible" class="db-name">
-        <svg
-          :style="{ transform: schemaVisible ? 'rotate(90deg)' : 'rotate(0)' }"
-          class="chevron-icon"
-          width="9"
-          height="9"
-          viewBox="0 0 8 12"
-          fill="none"
-          xmlns="http://www.w3.org/2000/svg"
-        >
-          <path
-            d="M0.721924 9.93097L4.85292 5.79997L0.721924 1.66897L1.99992 0.399973L7.39992 5.79997L1.99992 11.2L0.721924 9.93097Z"
-            :fill="schemaVisible ? '#506784' : 'rgba(80, 103, 132, 0.5)'"
-          />
-        </svg>
+        <tree-chevron :expanded="schemaVisible"/>
         {{ dbName }}
       </div>
-      <div class="db-edit">
-        <input type="file" id="actual-btn"  ref="dbfile" hidden @change="changeDb"/>
-        <label for="actual-btn">
-          <change-db-icon />
-        </label>
-      </div>
+        <db-uploader id="db-edit" type="small" />
     </div>
-    <div v-if="schemaVisible" class="schema">
+    <div v-show="schemaVisible" class="schema">
       <table-description
         v-for="table in schema"
         :key="table.name"
@@ -42,14 +24,16 @@
 <script>
 import TableDescription from '@/components/TableDescription'
 import TextField from '@/components/TextField'
-import ChangeDbIcon from '@/components/svg/changeDb'
+import TreeChevron from '@/components/svg/treeChevron'
+import DbUploader from '@/components/DbUploader'
 
 export default {
   name: 'Schema',
   components: {
     TableDescription,
     TextField,
-    ChangeDbIcon
+    TreeChevron,
+    DbUploader
   },
   data () {
     return {
@@ -66,20 +50,12 @@ export default {
       return !this.filter
         ? this.$store.state.schema
         : this.$store.state.schema.filter(
-          table => table[0].toUpperCase().indexOf(this.filter.toUpperCase()) !== -1
+          table => table.name.toUpperCase().indexOf(this.filter.toUpperCase()) !== -1
         )
     },
     dbName () {
       return this.$store.state.dbName
     }
-  },
-  methods: {
-    changeDb () {
-      this.$db.loadDb(this.$refs.dbfile.files[0])
-        .then((schema) => {
-          this.$store.commit('saveSchema', schema)
-        })
-    }
   }
 }
 </script>
@@ -120,12 +96,9 @@ export default {
 .db-name {
   cursor: pointer;
 }
->>> .chevron-icon {
-  -webkit-transition: transform .15s ease-in-out;
-  transition: transform .15s ease-in-out;
-}
+
 .db-name:hover .chevron-icon path,
 >>> .table-name:hover .chevron-icon path {
-  fill: #506784;
+  fill: var(--color-gray-dark);
 }
 </style>

src/components/Splitpanes.vue

@@ -3,13 +3,13 @@
     ref="container"
     :class="[
       'splitpanes',
-      `splitpanes--${horizontal ? 'horizontal' : 'vertical'}`,
-      { 'splitpanes--dragging': touch.dragging }
+      `splitpanes-${horizontal ? 'horizontal' : 'vertical'}`,
+      { 'splitpanes-dragging': dragging }
     ]"
   >
     <div class="movable-splitter" ref="movableSplitter" :style="movableSplitterStyle" />
     <div
-      class="splitpanes__pane"
+      class="splitpanes-pane"
       ref="left"
       :size="paneBefore.size"
       max-size="30"
@@ -19,20 +19,20 @@
     </div>
     <!-- Splitter start-->
     <div
-      class="splitpanes__splitter"
-      @mousedown="onMouseDown"
-      @touchstart="onMouseDown"
+      class="splitpanes-splitter"
+      @mousedown="bindEvents"
+      @touchstart="bindEvents"
     >
       <div
         :class="[
           'toggle-btns',
-          {'both': after.max === 100 && before.max === 100 && after.size > 0 && before.size > 0}
+          {'both': after.max === 100 && before.max === 100 && paneAfter.size > 0 && paneBefore.size > 0}
         ]"
       >
         <div
-          v-if="after.max === 100  && after.size > 0"
+          v-if="after.max === 100 && paneAfter.size > 0"
           class="toggle-btn"
-          @click="togglePane('before')"
+          @click="togglePane(paneBefore)"
         >
           <img
             class="direction-icon"
@@ -41,9 +41,9 @@
           >
         </div>
         <div
-          v-if="before.max === 100 && before.size > 0"
+          v-if="before.max === 100 && paneBefore.size > 0"
           class="toggle-btn"
-          @click="togglePane('after')"
+          @click="togglePane(paneAfter)"
         >
           <img
             class="direction-icon"
@@ -55,7 +55,7 @@
     </div>
     <!-- splitter end -->
     <div
-      class="splitpanes__pane"
+      class="splitpanes-pane"
       ref="right"
       :style="styles.after"
     >
@@ -65,6 +65,7 @@
 </template>
 
 <script>
+import splitter from '@/splitter'
 
 export default {
   name: 'Splitpanes',
@@ -82,10 +83,7 @@ export default {
         before: this.before.size,
         after: this.after.size
       },
-      touch: {
-        mouseDown: false,
-        dragging: false
-      },
+      dragging: false,
       movableSplitter: {
         top: 0,
         left: 0,
@@ -108,38 +106,42 @@ export default {
     },
     directionBeforeIconStyle () {
       const expanded = this.paneBefore.size !== 0
-      const translation = 'translate(-50%, -50%)'
+      const translation = 'translate(-50%, -50%) '
+      let rotation = ''
+
       if (this.horizontal) {
-        return {
-          transform: `${translation} ${expanded ? 'rotate(90deg)' : 'rotate(-90deg)'}`
-        }
+        rotation = expanded ? 'rotate(90deg)' : 'rotate(-90deg)'
       } else {
-        return {
-          transform: `${translation} ${expanded ? 'rotate(0deg)' : 'rotate(180deg)'}`
-        }
+        rotation = expanded ? 'rotate(0deg)' : 'rotate(180deg)'
+      }
+
+      return {
+        transform: translation + rotation
       }
     },
     directionAfterIconStyle () {
       const expanded = this.paneAfter.size !== 0
       const translation = 'translate(-50%, -50%)'
+      let rotation = ''
+
       if (this.horizontal) {
-        return {
-          transform: `${translation} ${expanded ? 'rotate(-90deg)' : 'rotate(90deg)'}`
-        }
+        rotation = expanded ? 'rotate(-90deg)' : 'rotate(90deg)'
       } else {
-        return {
-          transform: `${translation} ${expanded ? 'rotate(180deg)' : 'rotate(0deg)'}`
-        }
+        rotation = expanded ? 'rotate(180deg)' : 'rotate(0deg)'
+      }
+
+      return {
+        transform: translation + rotation
       }
     }
   },
 
   methods: {
     bindEvents () {
+      // Passive: false to prevent scrolling while touch dragging.
       document.addEventListener('mousemove', this.onMouseMove, { passive: false })
       document.addEventListener('mouseup', this.onMouseUp)
 
-      // Passive: false to prevent scrolling while touch dragging.
       if ('ontouchstart' in window) {
         document.addEventListener('touchmove', this.onMouseMove, { passive: false })
         document.addEventListener('touchend', this.onMouseUp)
@@ -156,24 +158,15 @@ export default {
       }
     },
 
-    onMouseDown () {
-      this.bindEvents()
-      this.touch.mouseDown = true
-    },
-
     onMouseMove (event) {
-      if (this.touch.mouseDown) {
-        // Prevent scrolling while touch dragging (only works with an active event, eg. passive: false).
-        event.preventDefault()
-        this.touch.dragging = true
-        this.$set(this.movableSplitter, 'visibility', 'visible')
-        this.moveSplitter(event)
-      }
+      event.preventDefault()
+      this.dragging = true
+      this.movableSplitter.visibility = 'visible'
+      this.moveSplitter(event)
     },
 
     onMouseUp () {
-      this.touch.mouseDown = false
-      if (this.touch.dragging) {
+      if (this.dragging) {
         const dragPercentage = this.horizontal
           ? this.movableSplitter.top
           : this.movableSplitter.left
@@ -186,65 +179,31 @@ export default {
           left: 0,
           visibility: 'hidden'
         }
+
+        this.dragging = false
       }
 
-      // Keep dragging flag until click event is finished (click happens immediately after mouseup)
-      // in order to prevent emitting `splitter-click` event if splitter was dragged.
-      setTimeout(() => {
-        this.touch.dragging = false
-        this.unbindEvents()
-      }, 100)
-    },
-
-    // Get the cursor position relative to the splitpane container.
-    getCurrentMouseDrag (event) {
-      const rect = this.container.getBoundingClientRect()
-      const { clientX, clientY } = ('ontouchstart' in window && event.touches)
-        ? event.touches[0]
-        : event
-      return {
-        x: clientX - rect.left,
-        y: clientY - rect.top
-      }
-    },
-
-    // Returns the drag percentage of the splitter relative to the 2 panes it's inbetween.
-    // if the sum of size of the 2 cells is 60%, the dragPercentage range will be 0 to 100% of this 60%.
-    getCurrentDragPercentage (drag) {
-      drag = drag[this.horizontal ? 'y' : 'x']
-      // In the code bellow 'size' refers to 'width' for vertical and 'height' for horizontal layout.
-      const containerSize = this.container[this.horizontal ? 'clientHeight' : 'clientWidth']
-      return drag * 100 / containerSize
+      this.unbindEvents()
     },
 
     moveSplitter (event) {
-      const dragPercentage = this.getCurrentDragPercentage(this.getCurrentMouseDrag(event))
-      const paneBefore = this.paneBefore
-      const paneAfter = this.paneAfter
-
-      const paneBeforeMaxReached = paneBefore.max < 100 && (dragPercentage >= paneBefore.max)
-      const paneAfterMaxReached = paneAfter.max < 100 && (dragPercentage <= 100 - paneAfter.max)
-
-      const dir = this.horizontal ? 'top' : 'left'
-
-      // Prevent dragging beyond pane max.
-      if (paneBeforeMaxReached || paneAfterMaxReached) {
-        if (paneBeforeMaxReached) {
-          this.$set(this.movableSplitter, dir, paneBefore.max)
-        } else {
-          this.$set(this.movableSplitter, dir, Math.max(100 - paneAfter.max, 0))
-        }
-      } else {
-        this.$set(this.movableSplitter, dir, Math.min(Math.max(dragPercentage, 0), paneBefore.max))
+      const splitterInfo = {
+        container: this.container,
+        paneBeforeMax: this.paneBefore.max,
+        paneAfterMax: this.paneAfter.max,
+        isHorisontal: this.horizontal
       }
+      const offset = splitter.calculateOffset(event, splitterInfo)
+      const dir = this.horizontal ? 'top' : 'left'
+      this.movableSplitter[dir] = offset
     },
-    togglePane (toggledPane) {
-      const pane = toggledPane === 'before' ? this.paneBefore : this.paneAfter
+
+    togglePane (pane) {
       if (pane.size > 0) {
         this.beforeMinimising.before = this.paneBefore.size
         this.beforeMinimising.after = this.paneAfter.size
         pane.size = 0
-        const otherPane = toggledPane === 'before' ? this.paneAfter : this.paneBefore
+        const otherPane = pane === this.paneBefore ? this.paneAfter : this.paneBefore
         otherPane.size = 100 - pane.size
       } else {
         this.paneBefore.size = this.beforeMinimising.before
@@ -265,11 +224,11 @@ export default {
   position: relative;
 }
 
-.splitpanes--vertical {flex-direction: row;}
-.splitpanes--horizontal {flex-direction: column;}
-.splitpanes--dragging * {user-select: none;}
+.splitpanes-vertical {flex-direction: row;}
+.splitpanes-horizontal {flex-direction: column;}
+.splitpanes-dragging * {user-select: none;}
 
-.splitpanes__pane {
+.splitpanes-pane {
   width: 100%;
   height: 100%;
   overflow: auto;
@@ -277,16 +236,16 @@ export default {
 
 /* Splitter */
 
-.splitpanes--vertical > .splitpanes__splitter,
-.splitpanes--vertical.splitpanes--dragging {
+.splitpanes-vertical > .splitpanes-splitter,
+.splitpanes-vertical.splitpanes-dragging {
   cursor: col-resize;
 }
-.splitpanes--horizontal > .splitpanes__splitter,
-.splitpanes--horizontal.splitpanes--dragging {
+.splitpanes-horizontal > .splitpanes-splitter,
+.splitpanes-horizontal.splitpanes-dragging {
   cursor: row-resize;
 }
 
-.splitpanes__splitter {
+.splitpanes-splitter {
   touch-action: none;
   background-color: var(--color-bg-light);
   box-sizing: border-box;
@@ -295,12 +254,12 @@ export default {
   z-index: 1;
 }
 
-.splitpanes--horizontal > .splitpanes__splitter {
+.splitpanes-horizontal > .splitpanes-splitter {
   border-top: 1px solid var(--color-border-light);
   border-bottom: 1px solid var(--color-border-light);
 }
 
-.splitpanes--vertical > .splitpanes__splitter {
+.splitpanes-vertical > .splitpanes-splitter {
   border-left: 1px solid var(--color-border-light);
   border-right: 1px solid var(--color-border-light);
 }
@@ -310,15 +269,15 @@ export default {
   background-color:rgba(162, 177, 198, 0.5);
 }
 
-.splitpanes--vertical > .splitpanes__splitter,
-.splitpanes--vertical > .movable-splitter {
+.splitpanes-vertical > .splitpanes-splitter,
+.splitpanes-vertical > .movable-splitter {
   width: 8px;
   z-index: 5;
   height: 100%
 }
 
-.splitpanes--horizontal > .splitpanes__splitter,
-.splitpanes--horizontal > .movable-splitter {
+.splitpanes-horizontal > .splitpanes-splitter,
+.splitpanes-horizontal > .movable-splitter {
   height: 8px;
   width: 100%;
   z-index: 5;
@@ -332,11 +291,11 @@ export default {
   display: flex;
 }
 
-.splitpanes--vertical > .splitpanes__splitter .toggle-btns {
+.splitpanes-vertical > .splitpanes-splitter .toggle-btns {
   flex-direction: column;
 }
 
-.splitpanes--horizontal > .splitpanes__splitter .toggle-btns {
+.splitpanes-horizontal > .splitpanes-splitter .toggle-btns {
   flex-direction: row;
 }
 
@@ -349,12 +308,12 @@ export default {
   cursor: pointer;
 }
 
-.splitpanes--vertical > .splitpanes__splitter .toggle-btn {
+.splitpanes-vertical > .splitpanes-splitter .toggle-btn {
   height: 49px;
   width: 8px;
 }
 
-.splitpanes--horizontal > .splitpanes__splitter .toggle-btn {
+.splitpanes-horizontal > .splitpanes-splitter .toggle-btn {
   width: 49px;
   height: 8px;
 }
@@ -365,20 +324,20 @@ export default {
   left: 50%;
 }
 
-.splitpanes--horizontal > .splitpanes__splitter .toggle-btns.both .toggle-btn:first-child {
+.splitpanes-horizontal > .splitpanes-splitter .toggle-btns.both .toggle-btn:first-child {
   border-radius: var(--border-radius-small) 0 0 var(--border-radius-small);
 }
 
-.splitpanes--horizontal > .splitpanes__splitter .toggle-btns.both .toggle-btn:last-child {
+.splitpanes-horizontal > .splitpanes-splitter .toggle-btns.both .toggle-btn:last-child {
   border-radius: 0 var(--border-radius-small) var(--border-radius-small) 0;
   margin-left: -1px;
 }
 
-.splitpanes--vertical > .splitpanes__splitter .toggle-btns.both .toggle-btn:first-child {
+.splitpanes-vertical > .splitpanes-splitter .toggle-btns.both .toggle-btn:first-child {
   border-radius: var(--border-radius-small) var(--border-radius-small) 0 0;
 }
 
-.splitpanes--vertical > .splitpanes__splitter .toggle-btns.both .toggle-btn:last-child {
+.splitpanes-vertical > .splitpanes-splitter .toggle-btns.both .toggle-btn:last-child {
   border-radius: 0 0 var(--border-radius-small) var(--border-radius-small);
   margin-top: -1px;
 }

src/components/SqlEditor.vue

@@ -1,38 +1,22 @@
 <template>
   <div class="codemirror-container">
-    <codemirror v-model="query" :options="cmOptions" @changes="onCmChange" />
+    <codemirror v-model="query" :options="cmOptions" @changes="onChange" />
   </div>
 </template>
 
 <script>
-import CM from 'codemirror'
+import hint from '@/hint'
 import { codemirror } from 'vue-codemirror'
 import 'codemirror/lib/codemirror.css'
 import 'codemirror/mode/sql/sql.js'
 import 'codemirror/theme/neo.css'
-import 'codemirror/addon/hint/show-hint.js'
 import 'codemirror/addon/hint/show-hint.css'
-import 'codemirror/addon/hint/sql-hint.js'
-import { debounce } from 'debounce'
-
-const sqlHint = CM.hint.sql
-CM.hint.sql = (cm, options) => {
-  const token = cm.getTokenAt(cm.getCursor()).string.toUpperCase()
-  const result = sqlHint(cm, options)
-  // Don't show the hint if there is only one option
-  // and the token is already completed with this option
-  if (result.list.length === 1 && result.list[0].text.toUpperCase() === token) {
-    result.list = []
-  }
-  return result
-}
+import 'codemirror/addon/display/autorefresh.js'
 
 export default {
   name: 'SqlEditor',
   props: ['value'],
-  components: {
-    codemirror
-  },
+  components: { codemirror },
   data () {
     return {
       query: this.value,
@@ -42,44 +26,19 @@ export default {
         mode: 'text/x-mysql',
         theme: 'neo',
         lineNumbers: true,
-        line: true
+        line: true,
+        autofocus: true,
+        autoRefresh: true
       }
     }
   },
-  computed: {
-    tables () {
-      const tables = {}
-      if (this.$store.state.schema) {
-        this.$store.state.schema.forEach(table => {
-          tables[table.name] = table.columns.map(column => column.name)
-        })
-      }
-      return tables
-    }
-  },
   watch: {
     query () {
       this.$emit('input', this.query)
     }
   },
   methods: {
-    onCmChange: debounce(function (editor) {
-      // Don't show autocomplete after a space or semicolon or in string literals
-      const ch = editor.getTokenAt(editor.getCursor()).string.slice(-1)
-      const tokenType = editor.getTokenAt(editor.getCursor()).type
-      if (tokenType === 'string' || !ch || ch === ' ' || ch === ';') {
-        return
-      }
-
-      const hintOptions = {
-        tables: this.tables,
-        completeSingle: false,
-        completeOnSingleClick: true,
-        alignWithWord: false
-      }
-
-      CM.showHint(editor, CM.hint.sql, hintOptions)
-    }, 400)
+    onChange: hint.show
   }
 }
 </script>

src/components/SqlTable.vue

@@ -40,6 +40,7 @@
     <div class="table-footer">
       <div class="table-footer-count">
         {{ dataSet.values.length}} {{dataSet.values.length === 1 ? 'row' : 'rows'}} retrieved
+        <span v-if="preview">for preview</span>
       </div>
       <pager v-show="pageCount > 1" :page-count="pageCount" v-model="currentPage" />
     </div>
@@ -52,7 +53,7 @@ import Pager from '@/components/Pager'
 export default {
   name: 'SqlTable',
   components: { Pager },
-  props: ['dataSet', 'height'],
+  props: ['dataSet', 'height', 'preview'],
   data () {
     return {
       header: null,
@@ -89,9 +90,6 @@ export default {
     },
     onScrollTable () {
       this.$refs['header-container'].scrollLeft = this.$refs['table-container'].scrollLeft
-    },
-    functionName () {
-
     }
   },
   mounted () {

src/components/Tab.vue

@@ -15,13 +15,19 @@
         <div id="bottomPane" ref="bottomPane">
           <view-switcher :view.sync="view" />
           <div v-show="view === 'table'" class="table-view">
-            <div v-show="result === null && !isGettingResults && !error" class="table-preview">
+            <div
+              v-show="result === null && !isGettingResults && !error"
+              class="table-preview result-before"
+            >
               Run your query and get results here
             </div>
-            <div v-show="isGettingResults" class="table-preview">
+            <div v-show="isGettingResults" class="table-preview result-in-progress">
               Fetching results...
             </div>
-            <div v-show="result === undefined && !isGettingResults && !error" class="table-preview">
+            <div
+              v-show="result === undefined && !isGettingResults && !error"
+              class="table-preview result-empty"
+            >
               No rows retrieved according to your query
             </div>
             <div v-show="error" class="table-preview error">
@@ -34,7 +40,7 @@
             :sql-result="result"
             :init-chart="initChart"
             ref="chart"
-            @update="isUnsaved = true"
+            @update="$store.commit('updateTab', { index: tabIndex, isUnsaved: true })"
           />
         </div>
       </template>
@@ -65,7 +71,6 @@ export default {
       result: null,
       view: 'table',
       tableViewHeight: 0,
-      isUnsaved: !this.initName,
       isGettingResults: false,
       error: null,
       resizeObserver: null
@@ -94,29 +99,21 @@ export default {
       }
     },
     query () {
-      this.isUnsaved = true
-    },
-    isUnsaved () {
-      this.$store.commit('updateTabState', { index: this.tabIndex, newValue: this.isUnsaved })
+      this.$store.commit('updateTab', { index: this.tabIndex, isUnsaved: true })
     }
   },
   methods: {
     // Run a command in the database
-    execute () {
-      // this.$refs.output.textContent = 'Fetching results...' */
+    async execute () {
       this.isGettingResults = true
       this.result = null
       this.error = null
-      this.$db.execute(this.query + ';')
-        .then(result => {
-          this.result = result
-        })
-        .catch(err => {
-          this.error = err
-        })
-        .finally(() => {
-          this.isGettingResults = false
-        })
+      try {
+        this.result = await this.$store.state.db.execute(this.query + ';')
+      } catch (err) {
+        this.error = err
+      }
+      this.isGettingResults = false
     },
     handleResize () {
       if (this.view === 'chart') {
@@ -137,9 +134,6 @@ export default {
       // 40 - height of table header
       const freeSpace = bottomPane.offsetHeight - 88 - 42 - 30 - 5 - 40
       this.tableViewHeight = freeSpace - (freeSpace % 40)
-    },
-    getChartSatateForSave () {
-      return this.$refs.chart.getChartSatateForSave()
     }
   }
 }

src/components/TableDescription.vue

@@ -1,20 +1,7 @@
 <template>
   <div>
     <div @click="colVisible = !colVisible" class="table-name">
-      <svg
-        :style="{transform: colVisible ? 'rotate(90deg)' : 'rotate(0)'}"
-        class="chevron-icon"
-        width="9"
-        height="9"
-        viewBox="0 0 8 12"
-        fill="none"
-        xmlns="http://www.w3.org/2000/svg"
-      >
-        <path
-          d="M0.721924 9.93097L4.85292 5.79997L0.721924 1.66897L1.99992 0.399973L7.39992 5.79997L1.99992 11.2L0.721924 9.93097Z"
-          :fill="colVisible ? '#506784' : 'rgba(80, 103, 132, 0.5)'"
-        />
-      </svg>
+      <tree-chevron :expanded="colVisible"/>
       {{ name }}
     </div>
     <div v-show="colVisible" class="columns">
@@ -27,9 +14,11 @@
 </template>
 
 <script>
+import TreeChevron from '@/components/svg/treeChevron'
 
 export default {
   name: 'TableDescription',
+  components: { TreeChevron },
   props: ['name', 'columns'],
   data () {
     return {

src/components/Tabs.vue

@@ -1,31 +1,19 @@
 <template>
-   <div id="tabs-container">
-    <div id="tabs__header" v-if="tabs.length > 0">
+   <div id="tabs">
+    <div id="tabs-header" v-if="tabs.length > 0">
       <div
         v-for="(tab, index) in tabs"
         :key="index"
         @click="selectTab(tab.id)"
-        :class="[{'tab__selected': (tab.id === selectedIndex)}, 'tab']"
+        :class="[{'tab-selected': (tab.id === selectedIndex)}, 'tab']"
       >
         <div class="tab-name">
-          <span v-show="tab.isUnsaved">*</span>
+          <span v-show="tab.isUnsaved" class="star">*</span>
           <span v-if="tab.name">{{ tab.name }}</span>
           <span v-else class="tab-untitled">{{ tab.tempName }}</span>
         </div>
         <div>
-          <svg
-            class="close-icon"
-            @click.stop="closeTab(index)"
-            width="10"
-            height="10"
-            viewBox="0 0 14 14"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              d="M14 1.41L12.59 0L7 5.59L1.41 0L0 1.41L5.59 7L0 12.59L1.41 14L7 8.41L12.59 14L14 12.59L8.41 7L14 1.41Z"
-              fill="#A2B1C6"/>
-          </svg>
+          <close-icon class="close-icon" :size="10" @click="beforeCloseTab(index)"/>
         </div>
       </div>
     </div>
@@ -39,23 +27,52 @@
       :is-predefined="tab.isPredefined"
       :tab-index="index"
     />
-    <div v-if="tabs.length === 0" id="start-guide">
+    <div v-show="tabs.length === 0" id="start-guide">
       <span class="link" @click="$root.$emit('createNewQuery')">Create</span>
       a new query from scratch or open the one from
       <router-link class="link" to="/my-queries">My queries</router-link>
     </div>
+
+    <!--Close tab warning dialog  -->
+    <modal name="close-warn" classes="dialog" height="auto">
+      <div class="dialog-header">
+        Close tab {{
+          closingTabIndex !== null
+          ? (tabs[closingTabIndex].name || `[${tabs[closingTabIndex].tempName}]`)
+          : ''
+        }}
+        <close-icon @click="$modal.hide('close-warn')"/>
+      </div>
+      <div class="dialog-body">
+        You have unsaved changes. Save changes in {{
+          closingTabIndex !== null
+          ? (tabs[closingTabIndex].name || `[${tabs[closingTabIndex].tempName}]`)
+          : ''
+        }} before closing?
+      </div>
+      <div class="dialog-buttons-container">
+        <button class="secondary" @click="closeTab(closingTabIndex)">
+          Close without saving
+        </button>
+        <button class="secondary" @click="$modal.hide('close-warn')">Cancel</button>
+        <button class="primary" @click="saveAndClose(closingTabIndex)">Save and close</button>
+      </div>
+    </modal>
   </div>
 </template>
 
 <script>
 import Tab from '@/components/Tab'
+import CloseIcon from '@/components/svg/close'
 
 export default {
   components: {
-    Tab
+    Tab,
+    CloseIcon
   },
   data () {
     return {
+      closingTabIndex: null
     }
   },
   computed: {
@@ -66,30 +83,60 @@ export default {
       return this.$store.state.currentTabId
     }
   },
+  created () {
+    window.addEventListener('beforeunload', this.leavingSqliteviz)
+  },
   methods: {
+    leavingSqliteviz (event) {
+      if (this.tabs.some(tab => tab.isUnsaved)) {
+        event.preventDefault()
+        event.returnValue = ''
+      }
+    },
     selectTab (id) {
       this.$store.commit('setCurrentTabId', id)
     },
+    beforeCloseTab (index) {
+      this.closingTabIndex = index
+      if (this.tabs[index].isUnsaved) {
+        this.$modal.show('close-warn')
+      } else {
+        this.closeTab(index)
+      }
+    },
     closeTab (index) {
+      this.$modal.hide('close-warn')
+      this.closingTabIndex = null
       this.$store.commit('deleteTab', index)
+    },
+    saveAndClose (index) {
+      this.$root.$on('querySaved', () => {
+        this.closeTab(index)
+        this.$root.$off('querySaved')
+      })
+      this.selectTab(this.tabs[index].id)
+      this.$modal.hide('close-warn')
+      this.$nextTick(() => {
+        this.$root.$emit('saveQuery')
+      })
     }
   }
 }
 </script>
 
 <style>
-#tabs-container {
+#tabs {
   position: relative;
   height: 100%;
   background-color: var(--color-bg-light);
 }
-#tabs__header {
+#tabs-header {
   display: flex;
   margin: 0;
   max-width: 100%;
   overflow: hidden;
 }
-#tabs__header .tab {
+#tabs-header .tab {
   height: 36px;
   background-color: var(--color-bg-light);
   border-right: 1px solid var(--color-border-light);
@@ -105,24 +152,24 @@ export default {
   flex-shrink: 1;
   min-width: 0;
 }
-#tabs__header .tab-name {
+#tabs-header .tab-name {
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
   flex-shrink: 1;
 }
 
-#tabs__header div:hover {
+#tabs-header div:hover {
   cursor: pointer;
 }
 
-#tabs__header .tab__selected {
+#tabs-header .tab-selected {
   color: var(--color-text-active);
   font-weight: 600;
   border-bottom: none;
   background-color: var(--color-white);
 }
-#tabs__header .tab__selected:hover {
+#tabs-header .tab-selected:hover {
     cursor: default;
 }
 
@@ -130,10 +177,6 @@ export default {
   margin-left: 5px;
 }
 
-.close-icon:hover path {
-  fill: var(--color-text-base);
-  cursor: pointer;
-}
 #start-guide {
   position: absolute;
   top: 50%;

src/components/TextField.vue

@@ -1,22 +1,28 @@
 <template>
   <div>
-    <div :class="['text-field-label', { error: errorMsg }]">{{ label }}</div>
+    <div :class="['text-field-label', { error: errorMsg }, {'disabled': disabled}]">
+      {{ label }}
+      <hint-icon class="hint" v-if="hint" :hint="hint" :max-width="maxHintWidth || '149px'"/>
+    </div>
     <input
       type="text"
       :placeholder="placeholder"
       :class="{ error: errorMsg }"
       :style="{ width: width }"
       :value="value"
+      :disabled="disabled"
       @input="$emit('input',  $event.target.value)"
     />
-    <div class="text-field-error">{{ errorMsg }}</div>
+    <div v-show="errorMsg" class="text-field-error">{{ errorMsg }}</div>
   </div>
 </template>
 
 <script>
+import HintIcon from '@/components/svg/hint'
 export default {
   name: 'textField',
-  props: ['placeholder', 'label', 'errorMsg', 'value', 'width']
+  props: ['placeholder', 'label', 'errorMsg', 'value', 'width', 'hint', 'maxHintWidth', 'disabled'],
+  components: { HintIcon }
 }
 </script>
 
@@ -30,6 +36,7 @@ input {
   padding: 0 8px;
   font-size: 13px;
   box-sizing: border-box;
+  display: block;
 }
 
 input::placeholder {
@@ -40,24 +47,44 @@ input:focus {
   outline: none;
 }
 
+input:disabled {
+  background: var(--color-bg-light);
+  color: var(--color-text-light-2);
+  cursor: default;
+}
+
 input.error {
   border-color: var(--color-text-error);
 }
+
 .text-field-label {
   font-size: 12px;
   color: var(--color-text-base);
   padding-left: 8px;
   margin-bottom: 2px;
+  display: inline-block;
+  position: relative;
+}
+
+.text-field-label .hint{
+  position: absolute;
+  top: -2px;
+  right: -22px;
 }
 
 .text-field-label.error {
   color: var(--color-text-error);
 }
 
+.text-field-label.disabled {
+  color: var(--color-text-light-2);
+}
+
 .text-field-error {
   color: var(--color-text-error);
   font-size: 12px;
   padding-left: 8px;
   margin-top: 2px;
+  position: absolute;
 }
 </style>

src/components/svg/changeDb.vue

@@ -8,7 +8,7 @@
     fill="none"
     xmlns="http://www.w3.org/2000/svg"
     @mouseover="showTooltip"
-    @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+    @mouseout="hideTooltip"
   >
     <path
       d="M3 10.5V12.75C3 14.25 5.2875 15.54 8.25 15.75V13.5825L8.3475 13.5C5.34 13.32 3 12.045 3 10.5ZM9 9.75C5.685 9.75 3 8.4075 3 6.75V9C3 10.6575 5.685 12 9 12C9.2925 12 9.5775 12 9.87 12L12.75 9.09C11.55 9.54 10.2825 9.75 9 9.75ZM9 2.25C5.685 2.25 3 3.5925 3 5.25C3 6.9075 5.685 8.25 9 8.25C12.315 8.25 15 6.9075 15 5.25C15 3.5925 12.315 2.25 9 2.25ZM15.75 8.3475C15.6375 8.3475 15.5325 8.3925 15.4575 8.475L14.7075 9.225L16.245 10.725L16.995 9.975C17.1525 9.825 17.16 9.57 16.995 9.3975L16.065 8.475C15.99 8.3925 15.885 8.3475 15.78 8.3475H15.75ZM14.28 9.66L9.75 14.205V15.75H11.295L15.84 11.1975L14.28 9.66Z"

src/components/svg/clear.vue

@@ -0,0 +1,41 @@
+<template>
+  <svg
+    :class="['clear-icon', {'disabled': disabled}]"
+    width="20"
+    height="20"
+    viewBox="0 0 20 20"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path
+      d="M14.3481 14.849C13.8791 15.318 13.1191 15.318 12.6511 14.849L10.0001 11.819L7.34907 14.848C6.88007 15.317 6.12007 15.317 5.65207 14.848C5.18307 14.379 5.18307 13.619 5.65207 13.151L8.41007 10.001L5.65107 6.84898C5.18207 6.37998 5.18207 5.62098 5.65107 5.15198C6.12007 4.68298 6.87907 4.68298 7.34807 5.15198L10.0001 8.18298L12.6511 5.15198C13.1201 4.68298 13.8791 4.68298 14.3481 5.15198C14.8171 5.62098 14.8171 6.38098 14.3481 6.84898L11.5901 10.001L14.3481 13.151C14.8171 13.62 14.8171 14.38 14.3481 14.849V14.849Z"
+      fill="#C8D4E3"
+    />
+  </svg>
+</template>
+
+<script>
+
+export default {
+  name: 'ClearIcon',
+  props: ['disabled']
+}
+</script>
+
+<style scoped>
+.clear-icon {
+  cursor: pointer;
+}
+
+.clear-icon:hover path {
+  fill: var(--color-danger);
+}
+
+.disabled.clear-icon {
+  cursor: default;
+}
+
+.disabled.clear-icon:hover path {
+  fill: #C8D4E3;
+}
+</style>

src/components/svg/close.vue

@@ -1,12 +1,35 @@
 <template>
-  <svg @click.stop="$emit('click')" class="icon" width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">
-    <path d="M14 1.41L12.59 0L7 5.59L1.41 0L0 1.41L5.59 7L0 12.59L1.41 14L7 8.41L12.59 14L14 12.59L8.41 7L14 1.41Z" fill="#A2B1C6"/>
+  <svg
+    @click.stop="$emit('click')"
+    :class="['icon', {'disabled': disabled }]"
+    :width="size"
+    :height="size"
+    viewBox="0 0 14 14"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path
+      d="M14 1.41L12.59 0L7 5.59L1.41 0L0 1.41L5.59 7L0 12.59L1.41 14L7 8.41L12.59 14L14 12.59L8.41 7L14 1.41Z"
+      fill="#A2B1C6"
+    />
   </svg>
 </template>
 
 <script>
 export default {
-  name: 'CloseIcon'
+  name: 'CloseIcon',
+  props: {
+    size: {
+      type: Number,
+      required: false,
+      default: 14
+    },
+    disabled: {
+      type: Boolean,
+      required: false,
+      default: false
+    }
+  }
 }
 </script>
 
@@ -14,7 +37,10 @@ export default {
 .icon {
   cursor: pointer;
 }
+.disabled {
+  pointer-events: none;
+}
 .icon:hover path {
-  fill: var(--color-text-active);
+  fill: var(--color-text-base);
 }
 </style>

src/components/svg/copy.vue

@@ -9,7 +9,7 @@
       xmlns="http://www.w3.org/2000/svg"
       @click.stop="$emit('click')"
       @mouseover="showTooltip"
-      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+      @mouseout="hideTooltip"
     >
       <path
         d="M14.25 15.75H6V5.25H14.25V15.75ZM14.25 3.75H6C5.60218 3.75 5.22064 3.90804 4.93934 4.18934C4.65804 4.47064 4.5 4.85218 4.5 5.25V15.75C4.5 16.1478 4.65804 16.5294 4.93934 16.8107C5.22064 17.092 5.60218 17.25 6 17.25H14.25C14.6478 17.25 15.0294 17.092 15.3107 16.8107C15.592 16.5294 15.75 16.1478 15.75 15.75V5.25C15.75 4.85218 15.592 4.47064 15.3107 4.18934C15.0294 3.90804 14.6478 3.75 14.25 3.75ZM12 0.75H3C2.60218 0.75 2.22064 0.908035 1.93934 1.18934C1.65804 1.47064 1.5 1.85218 1.5 2.25V12.75H3V2.25H12V0.75Z"

src/components/svg/delete.vue

@@ -9,7 +9,7 @@
       xmlns="http://www.w3.org/2000/svg"
       @click.stop="$emit('click')"
       @mouseover="showTooltip"
-      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+      @mouseout="hideTooltip"
     >
       <path
         d="M6.75 2.25V3H3V4.5H3.75V14.25C3.75 14.6478 3.90804 15.0294 4.18934 15.3107C4.47064 15.592 4.85218 15.75 5.25 15.75H12.75C13.1478 15.75 13.5294 15.592 13.8107 15.3107C14.092 15.0294 14.25 14.6478 14.25 14.25V4.5H15V3H11.25V2.25H6.75ZM5.25 4.5H12.75V14.25H5.25V4.5ZM6.75 6V12.75H8.25V6H6.75ZM9.75 6V12.75H11.25V6H9.75Z"

src/components/svg/dropDownChevron.vue

@@ -0,0 +1,38 @@
+<template>
+  <svg
+    :class="['chevron-icon', {'disabled': disabled}]"
+    width="20"
+    height="20"
+    viewBox="0 0 20 20"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path d="M6.175 7.15002L10 10.975L13.825 7.15002L15 8.33336L10 13.3334L5 8.33336L6.175 7.15002Z" fill="#C8D4E3"/>
+  </svg>
+</template>
+
+<script>
+
+export default {
+  name: 'DropDownChevron',
+  props: ['disabled']
+}
+</script>
+
+<style scoped>
+.chevron-icon {
+  cursor: pointer;
+}
+
+.chevron-icon:hover path {
+  fill: var(--color-accent);
+}
+
+.disabled.chevron-icon {
+  cursor: default;
+}
+
+.disabled.chevron-icon:hover path {
+  fill: #C8D4E3;
+}
+</style>

src/components/svg/export.vue

@@ -9,7 +9,7 @@
       xmlns="http://www.w3.org/2000/svg"
       @click.stop="$emit('click')"
       @mouseover="showTooltip"
-      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+      @mouseout="hideTooltip"
     >
       <path
         d="M10.5 1.5H4.5C3.675 1.5 3 2.175 3 3V15C3 15.825 3.675 16.5 4.5 16.5H13.5C14.325 16.5 15 15.825 15 15V6L10.5 1.5ZM13.5 15H4.5V3H9.75V6.75H13.5V15ZM12 8.25V13.575L10.425 12L8.325 14.1L6.225 12L8.325 9.9L6.675 8.25H12Z"

src/components/svg/hint.vue

@@ -0,0 +1,48 @@
+<template>
+  <div>
+    <svg
+      class="hint-icon"
+      width="20"
+      height="20"
+      viewBox="0 0 20 20"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      @mouseover="showTooltip"
+      @mouseout="hideTooltip"
+    >
+      <path d="M8.75 14.1666H10.4167V12.5H8.75V14.1666ZM9.58333 16.25C5.90833 16.25 2.91667 13.2583 2.91667 9.58333C2.91667 5.90833 5.90833 2.91667 9.58333 2.91667C13.2583 2.91667 16.25 5.90833 16.25 9.58333C16.25 13.2583 13.2583 16.25 9.58333 16.25ZM9.58333 1.25C8.48898 1.25 7.40535 1.46555 6.3943 1.88434C5.38326 2.30313 4.4646 2.91696 3.69078 3.69078C2.12797 5.25358 1.25 7.3732 1.25 9.58333C1.25 11.7935 2.12797 13.9131 3.69078 15.4759C4.4646 16.2497 5.38326 16.8635 6.3943 17.2823C7.40535 17.7011 8.48898 17.9167 9.58333 17.9167C11.7935 17.9167 13.9131 17.0387 15.4759 15.4759C17.0387 13.9131 17.9167 11.7935 17.9167 9.58333C17.9167 8.48898 17.7011 7.40535 17.2823 6.3943C16.8635 5.38326 16.2497 4.4646 15.4759 3.69078C14.7021 2.91696 13.7834 2.30313 12.7724 1.88434C11.7613 1.46555 10.6777 1.25 9.58333 1.25Z" fill="#A2B1C6"/>
+      <path d="M9.91601 4.51787C8.98167 4.42606 8.05144 4.69097 7.36309 5.24472C6.68735 5.78828 6.2998 6.56661 6.2998 7.38012H7.92488C7.92488 6.97463 8.11059 6.60187 8.44779 6.33061C8.79784 6.049 9.25647 5.92005 9.73896 5.96755C10.4832 6.04076 11.0828 6.57277 11.1647 7.23265C11.2306 7.764 10.9661 8.28194 10.4744 8.58426C9.38676 9.25303 8.73742 10.343 8.73742 11.5H10.3625C10.3625 10.8243 10.7477 10.184 11.3929 9.78733C12.3808 9.17985 12.9122 8.13913 12.7798 7.07124C12.6144 5.73863 11.41 4.66476 9.91601 4.51787Z" fill="#A2B1C6"/>
+    </svg>
+    <span class="icon-tooltip" :style="{...tooltipStyle, maxWidth: maxWidth }">
+      {{ hint }}
+    </span>
+  </div>
+</template>
+
+<script>
+import tooltipMixin from '@/mixins/tooltips'
+
+export default {
+  name: 'HintIcon',
+  props: ['hint', 'maxWidth'],
+  mixins: [tooltipMixin]
+}
+</script>
+
+<style scoped>
+.hint-icon {
+  display: block;
+  cursor: pointer;
+}
+.hint-icon:hover path {
+  fill: var(--color-text-base);
+}
+.icon-tooltip {
+  display: block;
+  white-space: normal;
+  height: auto;
+  line-height: normal;
+  padding: 6px;
+  box-sizing: border-box;
+}
+</style>

src/components/svg/rename.vue

@@ -9,7 +9,7 @@
       xmlns="http://www.w3.org/2000/svg"
       @click.stop="$emit('click')"
       @mouseover="showTooltip"
-      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+      @mouseout="hideTooltip"
     >
       <path
         d="M10.545 6.75L11.25 7.455L4.44 14.25H3.75V13.56L10.545 6.75ZM13.245 2.25C13.0575 2.25 12.8625 2.325 12.72 2.4675L11.3475 3.84L14.16 6.6525L15.5325 5.28C15.825 4.9875 15.825 4.5 15.5325 4.2225L13.7775 2.4675C13.6275 2.3175 13.44 2.25 13.245 2.25ZM10.545 4.6425L2.25 12.9375V15.75H5.0625L13.3575 7.455L10.545 4.6425Z"

src/components/svg/treeChevron.vue

@@ -0,0 +1,36 @@
+<template>
+  <svg
+    :style="{ transform: expanded ? 'rotate(90deg)' : 'rotate(0)' }"
+    class="chevron-icon"
+    width="9"
+    height="9"
+    viewBox="0 0 8 12"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path
+      d="M0.721924 9.93097L4.85292 5.79997L0.721924 1.66897L1.99992 0.399973L7.39992 5.79997L1.99992 11.2L0.721924 9.93097Z"
+      :fill="expanded ? '#506784' : 'rgba(80, 103, 132, 0.5)'"
+    />
+  </svg>
+</template>
+
+<script>
+
+export default {
+  name: 'treeChevron',
+  props: {
+    expanded: {
+      type: Boolean,
+      required: true
+    }
+  }
+}
+</script>
+
+<style scoped>
+.chevron-icon {
+  -webkit-transition: transform .15s ease-in-out;
+  transition: transform .15s ease-in-out;
+}
+</style>

src/csv.js

@@ -0,0 +1,78 @@
+import Papa from 'papaparse'
+
+const hintsByCode = {
+  MissingQuotes: 'Edit your CSV so that the field has a closing quote char.',
+  TooFewFields: 'Add fields or try another delimiter.',
+  TooManyFields: 'Edit your CSV or try another delimiter.'
+}
+
+export default {
+  getResult (source) {
+    const result = {}
+    if (source.meta.fields) {
+      result.columns = source.meta.fields
+      result.values = source.data.map(row => {
+        const resultRow = []
+        result.columns.forEach(col => { resultRow.push(row[col]) })
+        return resultRow
+      })
+    } else {
+      result.values = source.data
+      result.columns = []
+      for (let i = 1; i <= source.data[0].length; i++) {
+        result.columns.push(`col${i}`)
+      }
+    }
+
+    return result
+  },
+
+  parse (file, config = {}) {
+    return new Promise((resolve, reject) => {
+      const defaultConfig = {
+        delimiter: '', // auto-detect
+        newline: '', // auto-detect
+        quoteChar: '"',
+        escapeChar: '"',
+        header: false,
+        transformHeader: undefined,
+        dynamicTyping: true,
+        preview: 0,
+        encoding: 'UTF-8',
+        worker: true,
+        comments: false,
+        step: undefined,
+        complete: results => {
+          const res = {
+            data: this.getResult(results),
+            delimiter: results.meta.delimiter,
+            hasErrors: false
+          }
+          res.messages = results.errors.map(msg => {
+            msg.type = msg.code === 'UndetectableDelimiter' ? 'info' : 'error'
+            if (msg.type === 'error') res.hasErrors = true
+            msg.hint = hintsByCode[msg.code]
+            return msg
+          })
+          resolve(res)
+        },
+        error: (error, file) => {
+          reject(error)
+        },
+        download: false,
+        downloadRequestHeaders: undefined,
+        downloadRequestBody: undefined,
+        skipEmptyLines: 'greedy',
+        chunk: undefined,
+        chunkSize: undefined,
+        fastMode: undefined,
+        beforeFirstChunk: undefined,
+        withCredentials: undefined,
+        transform: undefined,
+        delimitersToGuess: [',', '\t', '|', ';', Papa.RECORD_SEP, Papa.UNIT_SEP]
+      }
+
+      Papa.parse(file, { ...defaultConfig, ...config })
+    })
+  }
+}

src/dataBase.js

@@ -1,47 +0,0 @@
-import store from '@/store'
-const worker = new Worker('js/worker.sql-wasm.js')
-
-export default {
-  loadDb (file) {
-    return new Promise((resolve, reject) => {
-      const dbName = file.name
-      store.commit('saveDbName', dbName)
-      const f = file
-      const r = new FileReader()
-      r.onload = () => {
-        // on 'action: open' completed
-        worker.onmessage = () => {
-          const getSchemaSql = `
-            SELECT name, sql
-            FROM sqlite_master
-            WHERE type='table' AND name NOT LIKE 'sqlite_%';`
-
-          // on 'action: exec' completed
-          worker.onmessage = event => {
-            resolve(event.data.results[0].values)
-          }
-          worker.postMessage({ action: 'exec', sql: getSchemaSql })
-        }
-
-        try {
-          worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
-        } catch (exception) {
-          worker.postMessage({ action: 'open', buffer: r.result })
-        }
-      }
-      r.readAsArrayBuffer(f)
-    })
-  },
-  execute (commands) {
-    return new Promise((resolve, reject) => {
-      worker.onmessage = (event) => {
-        if (event.data.error) {
-          reject(event.data.error)
-        }
-        // if it was more than one select - take only the first one
-        resolve(event.data.results[0])
-      }
-      worker.postMessage({ action: 'exec', sql: commands })
-    })
-  }
-}

src/database.js

@@ -0,0 +1,155 @@
+import sqliteParser from 'sqlite-parser'
+import fu from '@/file.utils'
+// We can import workers like so because of worker-loader:
+// https://webpack.js.org/loaders/worker-loader/
+import Worker from '@/db.worker.js'
+
+// Use promise-worker in order to turn worker into the promise based one:
+// https://github.com/nolanlawson/promise-worker
+import PromiseWorker from 'promise-worker'
+
+function getNewDatabase () {
+  const worker = new Worker()
+  return new Database(worker)
+}
+
+export default {
+  getNewDatabase
+}
+
+let progressCounterIds = 0
+class Database {
+  constructor (worker) {
+    this.worker = worker
+    this.pw = new PromiseWorker(worker)
+
+    this.importProgresses = {}
+    worker.addEventListener('message', e => {
+      const progress = e.data.progress
+      if (progress !== undefined) {
+        const id = e.data.id
+        this.importProgresses[id].dispatchEvent(new CustomEvent('progress', {
+          detail: progress
+        }))
+      }
+    })
+  }
+
+  shutDown () {
+    this.worker.terminate()
+  }
+
+  createProgressCounter (callback) {
+    const id = progressCounterIds++
+    this.importProgresses[id] = new EventTarget()
+    this.importProgresses[id].addEventListener('progress', e => { callback(e.detail) })
+    return id
+  }
+
+  deleteProgressCounter (id) {
+    delete this.importProgresses[id]
+  }
+
+  async createDb (name, data, progressCounterId) {
+    const result = await this.pw.postMessage({
+      action: 'import',
+      columns: data.columns,
+      values: data.values,
+      progressCounterId
+    })
+
+    if (result.error) {
+      throw result.error
+    }
+
+    return await this.getSchema(name)
+  }
+
+  async loadDb (file) {
+    const fileContent = await fu.readAsArrayBuffer(file)
+    const res = await this.pw.postMessage({ action: 'open', buffer: fileContent })
+
+    if (res.error) {
+      throw res.error
+    }
+
+    return this.getSchema(file.name)
+  }
+
+  async getSchema (name) {
+    const getSchemaSql = `
+      SELECT name, sql
+      FROM sqlite_master
+      WHERE type='table' AND name NOT LIKE 'sqlite_%';
+    `
+    const result = await this.execute(getSchemaSql)
+    // Parse DDL statements to get column names and types
+    const parsedSchema = []
+    result.values.forEach(item => {
+      parsedSchema.push({
+        name: item[0],
+        columns: getColumns(item[1])
+      })
+    })
+
+    // Return db name and schema
+    return {
+      dbName: name,
+      schema: parsedSchema
+    }
+  }
+
+  async execute (commands) {
+    const results = await this.pw.postMessage({ action: 'exec', sql: commands })
+
+    if (results.error) {
+      throw results.error
+    }
+    // if it was more than one select - take only the last one
+    return results[results.length - 1]
+  }
+}
+
+function getAst (sql) {
+  // There is a bug is sqlite-parser
+  // It throws an error if tokenizer has an arguments:
+  // https://github.com/codeschool/sqlite-parser/issues/59
+  const fixedSql = sql
+    .replace(/(?<=tokenize=.+)"tokenchars=.+"/, '')
+    .replace(/(?<=tokenize=.+)"remove_diacritics=.+"/, '')
+    .replace(/(?<=tokenize=.+)"separators=.+"/, '')
+    .replace(/tokenize=.+(?=(,|\)))/, 'tokenize=unicode61')
+
+  return sqliteParser(fixedSql)
+}
+
+/*
+ * Return an array of columns with name and type. E.g.:
+ * [
+ *   { name: 'id',    type: 'INTEGER' },
+ *   { name: 'title', type: 'NVARCHAR(30)' },
+ * ]
+*/
+function getColumns (sql) {
+  const columns = []
+  const ast = getAst(sql)
+
+  const columnDefinition = ast.statement[0].format === 'table'
+    ? ast.statement[0].definition
+    : ast.statement[0].result.args.expression // virtual table
+
+  columnDefinition.forEach(item => {
+    if (item.variant === 'column' && ['identifier', 'definition'].includes(item.type)) {
+      let type = item.datatype ? item.datatype.variant : 'N/A'
+      if (item.datatype && item.datatype.args) {
+        type = type + '(' + item.datatype.args.expression[0].value
+        if (item.datatype.args.expression.length === 2) {
+          type = type + ', ' + item.datatype.args.expression[1].value
+        }
+        type = type + ')'
+      }
+      columns.push({ name: item.name, type: type })
+    }
+  })
+  return columns
+}

src/db.utils.js

@@ -0,0 +1,44 @@
+export default {
+  * generateChunks (arr, size) {
+    const count = Math.ceil(arr.length / size)
+
+    for (let i = 0; i <= count - 1; i++) {
+      const start = size * i
+      const end = start + size
+      yield arr.slice(start, end)
+    }
+  },
+
+  getInsertStmt (columns) {
+    const colList = `"${columns.join('", "')}"`
+    const params = columns.map(() => '?').join(', ')
+    return `INSERT INTO csv_import (${colList}) VALUES (${params});`
+  },
+
+  getCreateStatement (columns, values) {
+    let result = 'CREATE table csv_import('
+    columns.forEach((col, index) => {
+    // Get the first row of values to determine types
+      const value = values[0][index]
+      let type = ''
+      switch (typeof value) {
+        case 'number': {
+          type = 'REAL'
+          break
+        }
+        case 'boolean': {
+          type = 'INTEGER'
+          break
+        }
+        case 'string': {
+          type = 'TEXT'
+          break
+        }
+        default: type = 'TEXT'
+      }
+      result += `"${col}" ${type}, `
+    })
+    result = result.replace(/,\s$/, ');')
+    return result
+  }
+}

src/db.worker.js

@@ -0,0 +1,34 @@
+import registerPromiseWorker from 'promise-worker/register'
+import Sql from '@/sql'
+
+const sqlReady = Sql.build()
+
+function processMsg (sql) {
+  const data = this
+  switch (data && data.action) {
+    case 'open':
+      return sql.open(data.buffer)
+    case 'exec':
+      return sql.exec(data.sql, data.params)
+    case 'import':
+      return sql.import(data.columns, data.values, data.progressCounterId, postMessage)
+    case 'export':
+      return sql.export()
+    case 'close':
+      return sql.close()
+    default:
+      throw new Error('Invalid action : ' + (data && data.action))
+  }
+}
+
+function onError (error) {
+  return {
+    error
+  }
+}
+
+registerPromiseWorker(data => {
+  return sqlReady
+    .then(processMsg.bind(data))
+    .catch(onError)
+})

src/file.utils.js

@@ -0,0 +1,71 @@
+export default {
+  exportToFile (str, fileName, type = 'octet/stream') {
+    // Create downloader
+    const downloader = document.createElement('a')
+    const blob = new Blob([str], { type })
+    const url = URL.createObjectURL(blob)
+    downloader.href = url
+    downloader.download = fileName
+
+    // Trigger click
+    downloader.click()
+
+    // Clean up
+    URL.revokeObjectURL(url)
+  },
+
+  /**
+   * Note: if user press Cancel in file choosing dialog
+   * it will be an unsettled promise. But it's grabbed by
+   * the garbage collector (tested with FinalizationRegistry).
+   */
+  getFileFromUser (type) {
+    return new Promise(resolve => {
+      const uploader = document.createElement('input')
+
+      uploader.type = 'file'
+      uploader.accept = type
+
+      uploader.addEventListener('change', () => {
+        const file = uploader.files[0]
+        resolve(file)
+      })
+
+      uploader.click()
+    })
+  },
+
+  importFile () {
+    const reader = new FileReader()
+
+    return this.getFileFromUser('.json')
+      .then(file => {
+        return new Promise((resolve, reject) => {
+          reader.onload = e => {
+            resolve(e.target.result)
+          }
+          reader.readAsText(file)
+        })
+      })
+  },
+
+  readFile (path) {
+    return fetch(path)
+  },
+
+  readAsArrayBuffer (file) {
+    const fileReader = new FileReader()
+
+    return new Promise((resolve, reject) => {
+      fileReader.onerror = () => {
+        fileReader.abort()
+        reject(new Error('Problem parsing input file.'))
+      }
+
+      fileReader.onload = () => {
+        resolve(fileReader.result)
+      }
+      fileReader.readAsArrayBuffer(file)
+    })
+  }
+}

src/hint.js

@@ -0,0 +1,45 @@
+import CM from 'codemirror'
+import 'codemirror/addon/hint/show-hint.js'
+import 'codemirror/addon/hint/sql-hint.js'
+import store from '@/store'
+import { debounce } from 'debounce'
+
+export function getHints (cm, options) {
+  const token = cm.getTokenAt(cm.getCursor()).string.toUpperCase()
+  const result = CM.hint.sql(cm, options)
+  // Don't show the hint if there is only one option
+  // and the token is already completed with this option
+  if (result.list.length === 1 && result.list[0].text.toUpperCase() === token) {
+    result.list = []
+  }
+  return result
+}
+
+const hintOptions = {
+  get tables () {
+    const tables = {}
+    if (store.state.schema) {
+      store.state.schema.forEach(table => {
+        tables[table.name] = table.columns.map(column => column.name)
+      })
+    }
+    return tables
+  },
+  completeSingle: false,
+  completeOnSingleClick: true,
+  alignWithWord: false
+}
+
+export default {
+  show: debounce(function (editor) {
+    // Don't show autocomplete after a space or semicolon or in string literals
+    const token = editor.getTokenAt(editor.getCursor())
+    const ch = token.string.slice(-1)
+    const tokenType = token.type
+    if (tokenType === 'string' || !ch || ch === ' ' || ch === ';') {
+      return
+    }
+
+    CM.showHint(editor, getHints, hintOptions)
+  }, 400)
+}

src/main.js

@@ -4,7 +4,6 @@ import router from './router'
 import store from './store'
 import { VuePlugin } from 'vuera'
 import VModal from 'vue-js-modal'
-import db from '@/dataBase'
 
 import '@/assets/styles/variables.css'
 import '@/assets/styles/buttons.css'
@@ -17,7 +16,6 @@ Vue.use(VuePlugin)
 Vue.use(VModal)
 
 Vue.config.productionTip = false
-Vue.prototype.$db = db
 
 new Vue({
   router,

src/mixins/tooltips.js

@@ -1,17 +1,19 @@
 export default {
   data () {
     return {
-      tooltipStyle: {}
+      tooltipStyle: {
+        visibility: 'hidden'
+      }
     }
   },
   methods: {
     showTooltip (e) {
-      this.tooltipStyle = {
-        visibility: 'visible',
-        position: 'fixed',
-        top: e.clientY - 12 + 'px',
-        left: e.clientX + 12 + 'px'
-      }
+      this.tooltipStyle.top = e.clientY - 12 + 'px'
+      this.tooltipStyle.left = e.clientX + 12 + 'px'
+      this.tooltipStyle.visibility = 'visible'
+    },
+    hideTooltip () {
+      this.tooltipStyle.visibility = 'hidden'
     }
   }
 }

src/router/index.js

@@ -1,9 +1,9 @@
 import Vue from 'vue'
 import VueRouter from 'vue-router'
-import Editor from '../views/Editor'
-import MyQueries from '../views/MyQueries'
-import Home from '../views/Home'
-import MainView from '../views/MainView'
+import Editor from '@/views/Editor'
+import MyQueries from '@/views/MyQueries'
+import Home from '@/views/Home'
+import MainView from '@/views/MainView'
 
 Vue.use(VueRouter)
 

src/splitter.js

@@ -0,0 +1,36 @@
+export default {
+  // Get the cursor position relative to the splitpane container.
+  getCurrentMouseDrag (event, container) {
+    const rect = container.getBoundingClientRect()
+    const { clientX, clientY } = ('ontouchstart' in window && event.touches)
+      ? event.touches[0]
+      : event
+    return {
+      x: clientX - rect.left,
+      y: clientY - rect.top
+    }
+  },
+
+  // Returns the drag percentage of the splitter relative to the 2 panes it's inbetween.
+  getCurrentDragPercentage (event, container, isHorisontal) {
+    let drag = this.getCurrentMouseDrag(event, container)
+    drag = drag[isHorisontal ? 'y' : 'x']
+    const containerSize = container[isHorisontal ? 'clientHeight' : 'clientWidth']
+    return drag * 100 / containerSize
+  },
+
+  // Returns the new position in percents.
+  calculateOffset (event, { container, isHorisontal, paneBeforeMax, paneAfterMax }) {
+    const dragPercentage = this.getCurrentDragPercentage(event, container, isHorisontal)
+
+    const paneBeforeMaxReached = paneBeforeMax < 100 && (dragPercentage >= paneBeforeMax)
+    const paneAfterMaxReached = paneAfterMax < 100 && (dragPercentage <= 100 - paneAfterMax)
+
+    // Prevent dragging beyond pane max.
+    if (paneBeforeMaxReached || paneAfterMaxReached) {
+      return paneBeforeMaxReached ? paneBeforeMax : Math.max(100 - paneAfterMax, 0)
+    } else {
+      return Math.min(Math.max(dragPercentage, 0), paneBeforeMax)
+    }
+  }
+}

src/sql.js

@@ -0,0 +1,79 @@
+import initSqlJs from 'sql.js/dist/sql-wasm.js'
+import dbUtils from '@/db.utils'
+
+let SQL = null
+const sqlModuleReady = initSqlJs().then(sqlModule => { SQL = sqlModule })
+
+export default class Sql {
+  constructor () {
+    this.db = null
+  }
+
+  static build () {
+    return sqlModuleReady
+      .then(() => {
+        return new Sql()
+      })
+  }
+
+  createDb (buffer) {
+    if (this.db != null) this.db.close()
+    this.db = new SQL.Database(buffer)
+    return this.db
+  }
+
+  open (buffer) {
+    this.createDb(buffer && new Uint8Array(buffer))
+    return {
+      ready: true
+    }
+  }
+
+  exec (sql, params) {
+    if (this.db === null) {
+      this.createDb()
+    }
+    if (!sql) {
+      throw new Error('exec: Missing query string')
+    }
+    return this.db.exec(sql, params)
+  }
+
+  import (columns, values, progressCounterId, progressCallback, chunkSize = 1500) {
+    this.createDb()
+    this.db.exec(dbUtils.getCreateStatement(columns, values))
+    const chunks = dbUtils.generateChunks(values, chunkSize)
+    const chunksAmount = Math.ceil(values.length / chunkSize)
+    let count = 0
+    const insertStr = dbUtils.getInsertStmt(columns)
+    const insertStmt = this.db.prepare(insertStr)
+
+    progressCallback({ progress: 0, id: progressCounterId })
+    for (const chunk of chunks) {
+      this.db.exec('BEGIN')
+      for (const row of chunk) {
+        insertStmt.run(row)
+      }
+      this.db.exec('COMMIT')
+      count++
+      progressCallback({ progress: 100 * (count / chunksAmount), id: progressCounterId })
+    }
+
+    return {
+      finish: true
+    }
+  }
+
+  export () {
+    return this.db.export()
+  }
+
+  close () {
+    if (this.db) {
+      this.db.close()
+    }
+    return {
+      finished: true
+    }
+  }
+}

src/store/index.js

@@ -1,106 +1,57 @@
 import Vue from 'vue'
 import Vuex from 'vuex'
-import sqliteParser from 'sqlite-parser'
+import { nanoid } from 'nanoid'
 
 Vue.use(Vuex)
 
-function getAst (sql) {
-  // There is a bug is sqlite-parser
-  // It throws an error if tokenizer has an arguments:
-  // https://github.com/codeschool/sqlite-parser/issues/59
-  const fixedSql = sql
-    .replace(/(?<=tokenize=.+)"tokenchars=.+"/, '')
-    .replace(/(?<=tokenize=.+)"remove_diacritics=.+"/, '')
-    .replace(/(?<=tokenize=.+)"separators=.+"/, '')
-    .replace(/tokenize=.+(?=(,|\)))/, 'tokenize=unicode61')
-
-  return sqliteParser(fixedSql)
+export const state = {
+  schema: null,
+  dbFile: null,
+  dbName: null,
+  tabs: [],
+  currentTab: null,
+  currentTabId: null,
+  untitledLastIndex: 0,
+  predefinedQueries: [],
+  db: null
 }
 
-function getColumns (sql) {
-  const columns = []
-  const ast = getAst(sql)
-
-  const columnDefinition = ast.statement[0].format === 'table'
-    ? ast.statement[0].definition
-    : ast.statement[0].result.args.expression // virtual table
-
-  columnDefinition.forEach(item => {
-    if (item.variant === 'column' && ['identifier', 'definition'].includes(item.type)) {
-      let type = item.datatype ? item.datatype.variant : 'N/A'
-      if (item.datatype && item.datatype.args) {
-        type = type + '(' + item.datatype.args.expression[0].value
-        if (item.datatype.args.expression.length === 2) {
-          type = type + ', ' + item.datatype.args.expression[1].value
-        }
-        type = type + ')'
-      }
-      columns.push({ name: item.name, type: type })
+export const mutations = {
+  setDb (state, db) {
+    if (state.db) {
+      state.db.shutDown()
     }
-  })
-  return columns
-}
-
-export default new Vuex.Store({
-  state: {
-    schema: null,
-    dbFile: null,
-    dbName: null,
-    tabs: [],
-    currentTab: null,
-    currentTabId: null,
-    untitledLastIndex: 0,
-    predefinedQueries: []
+    state.db = db
+  },
+  saveSchema (state, { dbName, schema }) {
+    state.dbName = dbName
+    state.schema = schema
   },
-  mutations: {
-    saveSchema (state, schema) {
-      const parsedSchema = []
-      schema.forEach(item => {
-        parsedSchema.push({
-          name: item[0],
-          columns: getColumns(item[1])
-        })
-      })
-      state.schema = parsedSchema
-    },
-    saveDbFile (state, file) {
-      state.dbFile = file
-    },
-    saveDbName (state, name) {
-      state.dbName = name
-    },
-    addTab (state, tab) {
-      state.tabs.push(tab)
 
-      if (!tab.name) {
-        state.untitledLastIndex += 1
-      }
-    },
-    updateTab (state, { index, name, id, query, chart, isUnsaved }) {
-      const tab = state.tabs[index]
-      const oldId = tab.id
+  updateTab (state, { index, name, id, query, chart, isUnsaved }) {
+    const tab = state.tabs[index]
+    const oldId = tab.id
 
-      if (state.currentTabId === oldId) {
-        state.currentTabId = id
-      }
+    if (id && state.currentTabId === oldId) {
+      state.currentTabId = id
+    }
 
-      tab.id = id
-      if (name) { tab.name = name }
-      if (query) { tab.query = query }
-      if (chart) { tab.chart = chart }
-      if (isUnsaved !== undefined) { tab.isUnsaved = isUnsaved }
+    if (id) { tab.id = id }
+    if (name) { tab.name = name }
+    if (query) { tab.query = query }
+    if (chart) { tab.chart = chart }
+    if (isUnsaved !== undefined) { tab.isUnsaved = isUnsaved }
+    if (!isUnsaved) {
+      // Saved query is not predefined
       delete tab.isPredefined
+    }
 
-      Vue.set(state.tabs, index, tab)
-    },
-    updateTabState (state, { index, newValue }) {
-      const tab = state.tabs[index]
-      tab.isUnsaved = newValue
-      Vue.set(state.tabs, index, tab)
-    },
-    deleteTab (state, index) {
-      if (state.tabs[index].id !== state.currentTabId) {
-      } else if (index < state.tabs.length - 1) {
+    Vue.set(state.tabs, index, tab)
+  },
+  deleteTab (state, index) {
+    // If closing tab is the current opened
+    if (state.tabs[index].id === state.currentTabId) {
+      if (index < state.tabs.length - 1) {
         state.currentTabId = state.tabs[index + 1].id
       } else if (index > 0) {
         state.currentTabId = state.tabs[index - 1].id
@@ -109,22 +60,55 @@ export default new Vuex.Store({
         state.currentTab = null
         state.untitledLastIndex = 0
       }
-      state.tabs.splice(index, 1)
-    },
-    setCurrentTabId (state, id) {
-      state.currentTabId = id
-    },
-    setCurrentTab (state, tab) {
-      state.currentTab = tab
-    },
-    updatePredefinedQueries (state, queries) {
-      if (Array.isArray(queries)) {
-        state.predefinedQueries = queries
-      } else {
-        state.predefinedQueries = [queries]
+    }
+    state.tabs.splice(index, 1)
+  },
+  setCurrentTabId (state, id) {
+    state.currentTabId = id
+  },
+  setCurrentTab (state, tab) {
+    state.currentTab = tab
+  },
+  updatePredefinedQueries (state, queries) {
+    if (Array.isArray(queries)) {
+      state.predefinedQueries = queries
+    } else {
+      state.predefinedQueries = [queries]
+    }
+  }
+}
+
+export const actions = {
+  async addTab ({ state }, data) {
+    const tab = data ? JSON.parse(JSON.stringify(data)) : {}
+    // If no data then create a new blank one...
+    // No data.id means to create new tab, but not blank,
+    // e.g. with 'select * from csv_import' query after csv import
+    if (!data || !data.id) {
+      tab.id = nanoid()
+      tab.name = null
+      tab.tempName = state.untitledLastIndex
+        ? `Untitled ${state.untitledLastIndex}`
+        : 'Untitled'
+      tab.isUnsaved = true
+    } else {
+      tab.isUnsaved = false
+    }
+
+    // add new tab only if was not already opened
+    if (!state.tabs.some(openedTab => openedTab.id === tab.id)) {
+      state.tabs.push(tab)
+      if (!tab.name) {
+        state.untitledLastIndex += 1
       }
     }
-  },
-  actions: {
+
+    return tab.id
   }
+}
+
+export default new Vuex.Store({
+  state,
+  mutations,
+  actions
 })

src/storedQueries.js

@@ -0,0 +1,96 @@
+import { nanoid } from 'nanoid'
+import fu from '@/file.utils'
+
+export default {
+  getStoredQueries () {
+    return JSON.parse(localStorage.getItem('myQueries')) || []
+  },
+
+  duplicateQuery (baseQuery) {
+    const newQuery = JSON.parse(JSON.stringify(baseQuery))
+    newQuery.name = newQuery.name + ' Copy'
+    newQuery.id = nanoid()
+    newQuery.createdAt = new Date()
+    delete newQuery.isPredefined
+
+    return newQuery
+  },
+
+  isTabNeedName (queryTab) {
+    const isFromScratch = !queryTab.initName
+    return queryTab.isPredefined || isFromScratch
+  },
+
+  save (queryTab, newName) {
+    const value = {
+      id: queryTab.isPredefined ? nanoid() : queryTab.id,
+      query: queryTab.query,
+      chart: queryTab.$refs.chart.getChartStateForSave(),
+      name: newName || queryTab.initName
+    }
+
+    // Get queries from local storage
+    const myQueries = this.getStoredQueries()
+
+    // Set createdAt
+    if (newName) {
+      value.createdAt = new Date()
+    } else {
+      var queryIndex = myQueries.findIndex(oldQuery => oldQuery.id === queryTab.id)
+      value.createdAt = myQueries[queryIndex].createdAt
+    }
+
+    // Insert in queries list
+    if (newName) {
+      myQueries.push(value)
+    } else {
+      myQueries[queryIndex] = value
+    }
+
+    // Save to local storage
+    this.updateStorage(myQueries)
+    return value
+  },
+
+  updateStorage (value) {
+    localStorage.setItem('myQueries', JSON.stringify(value))
+  },
+
+  serialiseQueries (queryList) {
+    const preparedData = JSON.parse(JSON.stringify(queryList))
+    preparedData.forEach(query => delete query.isPredefined)
+    return JSON.stringify(preparedData, null, 4)
+  },
+
+  deserialiseQueries (str) {
+    let queryList = JSON.parse(str)
+    // Turn data into array if they are not
+    if (!Array.isArray(queryList)) {
+      queryList = [queryList]
+    }
+
+    // Generate new ids if they are the same as existing queries
+    queryList.forEach(query => {
+      const allQueriesIds = this.getStoredQueries().map(query => query.id)
+      if (allQueriesIds.includes(query.id)) {
+        query.id = nanoid()
+      }
+    })
+
+    return queryList
+  },
+
+  importQueries () {
+    return fu.importFile()
+      .then(data => {
+        return this.deserialiseQueries(data)
+      })
+  },
+
+  readPredefinedQueries () {
+    return fu.readFile('./queries.json')
+      .then(resp => {
+        return resp.json()
+      })
+  }
+}

src/time.js

@@ -0,0 +1,36 @@
+export default {
+  getPeriod (start, end) {
+    let diff = end.getTime() - start.getTime()
+    let result = ''
+
+    const days = Math.floor(diff / (1000 * 60 * 60 * 24))
+    diff -= days * (1000 * 60 * 60 * 24)
+    if (days) {
+      result += days + ' d '
+    }
+
+    const hours = Math.floor(diff / (1000 * 60 * 60))
+    diff -= hours * (1000 * 60 * 60)
+    if (hours) {
+      result += hours + ' h '
+    }
+
+    const mins = Math.floor(diff / (1000 * 60))
+    diff -= mins * (1000 * 60)
+    if (mins) {
+      result += mins + ' m '
+    }
+
+    const seconds = Math.floor(diff / (1000))
+    diff -= seconds * (1000)
+    if (seconds) {
+      result += seconds + ' s '
+    }
+
+    if (diff) {
+      result += diff + ' ms '
+    }
+
+    return result.replace(/\s$/, '')
+  }
+}

src/views/Editor.vue

@@ -11,7 +11,7 @@
           <div class="warning">
             Database is not loaded. Queries can’t be run without database.
           </div>
-          <db-upload id="db-uploader"/>
+          <db-uploader id="db-uploader"/>
         </div>
       </template>
       <template #right-pane>
@@ -25,7 +25,7 @@
 import Splitpanes from '@/components/Splitpanes'
 import Schema from '@/components/Schema'
 import Tabs from '@/components/Tabs'
-import dbUpload from '@/components/DbUpload'
+import DbUploader from '@/components/DbUploader'
 
 export default {
   name: 'Editor',
@@ -33,7 +33,7 @@ export default {
     Schema,
     Splitpanes,
     Tabs,
-    dbUpload
+    DbUploader
   }
 }
 </script>
@@ -64,7 +64,7 @@ export default {
   box-sizing: border-box;
 }
 
->>> .db-upload-container {
+>>> .db-uploader-container {
   width: 100%;
 }
 

src/views/Home.vue

@@ -1,6 +1,6 @@
 <template>
   <div id="dbloader-container">
-    <db-upload illustrated />
+    <db-uploader type="illustrated" />
     <div id="note">
       Sqliteviz is fully client-side. Your database never leaves your computer.
     </div>
@@ -11,11 +11,11 @@
 </template>
 
 <script>
-import dbUpload from '@/components/DbUpload'
+import DbUploader from '@/components/DbUploader'
 
 export default {
   name: 'Home',
-  components: { dbUpload }
+  components: { DbUploader }
 }
 </script>
 
@@ -36,7 +36,7 @@ export default {
 }
 
 #skip {
-  margin-top: 83px;
+  margin-top: 42px;
 }
 
 >>>.drop-area {

src/views/MainView.vue

@@ -13,35 +13,7 @@ import '@/assets/styles/scrollbars.css'
 
 export default {
   name: 'MainView',
-  components: { MainMenu },
-  created () {
-    this.readPredefinedQueries()
-      .then(queries => {
-        this.$store.commit('updatePredefinedQueries', queries)
-      })
-      .catch(console.error)
-  },
-  methods: {
-    readPredefinedQueries () {
-      return new Promise((resolve, reject) => {
-        const xhr = new XMLHttpRequest()
-        xhr.open('GET', './queries.json')
-        xhr.onload = () => {
-          if (xhr.readyState === 4) {
-            if (xhr.status === 200) {
-              resolve(JSON.parse(xhr.responseText || '[]'))
-            } else {
-              reject(xhr.statusText)
-            }
-          }
-        }
-        xhr.onerror = () => {
-          reject(xhr.statusText)
-        }
-        xhr.send()
-      })
-    }
-  }
+  components: { MainMenu }
 }
 </script>
 <style scoped>

src/views/MyQueries.vue

@@ -2,33 +2,26 @@
   <div>
     <div id="start-guide" v-if="showedQueries.length === 0">
       You don't have saved queries so far.
-      <span class="link" @click="create">Create</span>
+      <span class="link" @click="$root.$emit('createNewQuery')">Create</span>
       the one from scratch or
-      <label for="import-file" class="link">import</label> from a file.
+      <span @click="importQueries" class="link">import</span> from a file.
     </div>
     <div id="my-queries-content" ref="my-queries-content" v-show="showedQueries.length > 0">
       <div id="my-queries-toolbar">
         <div id="toolbar-buttons">
-          <input
-            ref="importFile"
-            type="file"
-            accept=".json"
-            id="import-file"
-            @change="importQueries"
-          />
-          <button class="toolbar">
-            <label for="import-file">
-              Import
-            </label>
+          <button id="toolbar-btns-import" class="toolbar" @click="importQueries">
+            Import
           </button>
           <button
+            id="toolbar-btns-export"
             class="toolbar"
             v-show="selectedQueriesCount > 0"
-            @click="exportQuery(selectedQueriesIds)"
+            @click="exportSelectedQueries()"
           >
             Export
           </button>
           <button
+            id="toolbar-btns-delete"
             class="toolbar"
             v-show="selectedNotPredefinedCount > 0"
             @click="showDeleteDialog(selectedQueriesIds)"
@@ -52,15 +45,12 @@
           </div>
         </div>
       </div>
-      <div
-        class="table-container" :style="{ 'max-height': `${maxTableHeight}px` }"
-      >
+      <div class="table-container" :style="{ 'max-height': `${maxTableHeight}px` }">
         <table ref="table">
           <tbody>
             <tr
               v-for="(query, index) in showedQueries"
               :key="query.id"
-              :class="{ 'predefined': query.isPredefined }"
               @click="openQuery(index)"
             >
               <td ref="name-td">
@@ -72,9 +62,10 @@
                     />
                     <div class="name">{{ query.name }}</div>
                     <div
+                      v-if="query.isPredefined"
                       class="badge"
                       @mouseover="showTooltip"
-                      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+                      @mouseout="hideTooltip"
                     >
                       Predefined
                       <span class="icon-tooltip" :style="tooltipStyle">
@@ -90,8 +81,11 @@
                   <div class="icons-container">
                     <rename-icon v-if="!query.isPredefined" @click="showRenameDialog(query.id)" />
                     <copy-icon @click="duplicateQuery(index)"/>
-                    <export-icon @click="exportQuery(index)"/>
-                    <delete-icon v-if="!query.isPredefined" @click="showDeleteDialog(query.id)"/>
+                    <export-icon @click="exportToFile([query], `${query.name}.json`)"/>
+                    <delete-icon
+                      v-if="!query.isPredefined"
+                      @click="showDeleteDialog((new Set()).add(query.id))"
+                    />
                   </div>
                 </div>
               </td>
@@ -128,21 +122,8 @@
       Delete {{ deleteGroup ? 'queries' : 'query' }}
       <close-icon @click="$modal.hide('delete')"/>
     </div>
-    <div
-      v-if="
-        deleteGroup || (
-          currentQueryIndex !== null
-          && currentQueryIndex >= 0
-          && currentQueryIndex < queries.length
-        )
-      "
-      class="dialog-body"
-    >
-      Are you sure you want to delete
-      {{ deleteGroup
-        ? `${selectedNotPredefinedCount} ${selectedNotPredefinedCount > 1 ? 'queries' : 'query'}`
-        : `"${queries[currentQueryIndex].name}"`
-      }}?
+    <div class="dialog-body">
+      {{ deleteDialogMsg }}
       <div v-show="selectedQueriesCount > selectedNotPredefinedCount" id="note">
         <img :src="require('@/assets/images/info.svg')">
         Note: Predefined queries you've selected won't be deleted
@@ -153,7 +134,6 @@
       <button class="primary" @click="deleteQuery">Delete</button>
     </div>
   </modal>
-  <a ref="downloader" />
 </div>
 </template>
 
@@ -166,7 +146,8 @@ import CloseIcon from '@/components/svg/close'
 import TextField from '@/components/TextField'
 import CheckBox from '@/components/CheckBox'
 import tooltipMixin from '@/mixins/tooltips'
-import { nanoid } from 'nanoid'
+import storedQueries from '@/storedQueries'
+import fu from '@/file.utils'
 
 export default {
   name: 'MyQueries',
@@ -185,7 +166,7 @@ export default {
       queries: [],
       filter: null,
       newName: null,
-      currentQueryId: null,
+      processedQueryId: null,
       errorMsg: null,
       selectedQueriesIds: new Set(),
       selectedQueriesCount: 0,
@@ -218,12 +199,36 @@ export default {
     allQueries () {
       return this.predefinedQueries.concat(this.queries)
     },
-    currentQueryIndex () {
-      return this.queries.findIndex(query => query.id === this.currentQueryId)
+    processedQueryIndex () {
+      return this.queries.findIndex(query => query.id === this.processedQueryId)
+    },
+    deleteDialogMsg () {
+      if (!this.deleteGroup && (
+        this.processedQueryIndex === null ||
+          this.processedQueryIndex < 0 ||
+          this.processedQueryIndex > this.queries.length
+      )) {
+        return ''
+      }
+
+      const deleteItem = this.deleteGroup
+        ? `${this.selectedNotPredefinedCount} ${this.selectedNotPredefinedCount > 1
+          ? 'queries'
+          : 'query'}`
+        : `"${this.queries[this.processedQueryIndex].name}"`
+
+      return `Are you sure you want to delete ${deleteItem}?`
     }
   },
   created () {
-    this.queries = JSON.parse(localStorage.getItem('myQueries')) || []
+    storedQueries.readPredefinedQueries()
+      .then(queries => {
+        this.$store.commit('updatePredefinedQueries', queries)
+      })
+      .catch(console.error)
+      .finally(() => {
+        this.queries = storedQueries.getStoredQueries()
+      })
   },
   mounted () {
     this.resizeObserver = new ResizeObserver(this.calcMaxTableHeight)
@@ -264,21 +269,17 @@ export default {
       const freeSpace = this.$refs['my-queries-content'].offsetHeight - 200
       this.maxTableHeight = freeSpace - (freeSpace % 40) + 1
     },
-    create () {
-      this.$root.$emit('createNewQuery')
-      this.$router.push('/editor')
-    },
     openQuery (index) {
-      const tab = JSON.parse(JSON.stringify(this.showedQueries[index]))
-      tab.isUnsaved = false
-      this.$store.commit('addTab', tab)
-      this.$store.commit('setCurrentTabId', tab.id)
-      this.$router.push('/editor')
+      const tab = this.showedQueries[index]
+      this.$store.dispatch('addTab', tab).then(id => {
+        this.$store.commit('setCurrentTabId', id)
+        this.$router.push('/editor')
+      })
     },
     showRenameDialog (id) {
       this.errorMsg = null
-      this.currentQueryId = id
-      this.newName = this.queries[this.currentQueryIndex].name
+      this.processedQueryId = id
+      this.newName = this.queries[this.processedQueryIndex].name
       this.$modal.show('rename')
     },
     renameQuery () {
@@ -286,134 +287,102 @@ export default {
         this.errorMsg = 'Query name can\'t be empty'
         return
       }
-      const currentQuery = this.queries[this.currentQueryIndex]
-      currentQuery.name = this.newName
-      this.$set(this.queries, this.currentQueryIndex, currentQuery)
+      const processedQuery = this.queries[this.processedQueryIndex]
+      processedQuery.name = this.newName
+      this.$set(this.queries, this.processedQueryIndex, processedQuery)
 
       // update queries in local storage
-      this.saveQueriesInLocalStorage()
+      storedQueries.updateStorage(this.queries)
 
       // update tab, if renamed query is opened
-      const tabIndex = this.findTabIndex(currentQuery.id)
+      const tabIndex = this.findTabIndex(processedQuery.id)
       if (tabIndex >= 0) {
         this.$store.commit('updateTab', {
           index: tabIndex,
           name: this.newName,
-          id: currentQuery.id
+          id: processedQuery.id
         })
       }
       // hide dialog
       this.$modal.hide('rename')
     },
     duplicateQuery (index) {
-      const newQuery = JSON.parse(JSON.stringify(this.showedQueries[index]))
-      newQuery.name = newQuery.name + ' Copy'
-      newQuery.id = nanoid()
-      newQuery.createdAt = new Date()
-      delete newQuery.isPredefined
+      const newQuery = storedQueries.duplicateQuery(this.showedQueries[index])
       if (this.selectAll) {
         this.selectedQueriesIds.add(newQuery.id)
         this.selectedQueriesCount = this.selectedQueriesIds.size
       }
       this.queries.push(newQuery)
-      this.saveQueriesInLocalStorage()
+      storedQueries.updateStorage(this.queries)
     },
-    showDeleteDialog (id) {
-      this.deleteGroup = typeof id !== 'string'
+    showDeleteDialog (idsSet) {
+      this.deleteGroup = idsSet.size > 1
       if (!this.deleteGroup) {
-        this.currentQueryId = id
+        this.processedQueryId = idsSet.values().next().value
       }
       this.$modal.show('delete')
     },
     deleteQuery () {
       this.$modal.hide('delete')
       if (!this.deleteGroup) {
-        this.queries.splice(this.currentQueryIndex, 1)
-        const tabIndex = this.findTabIndex(this.currentQueryId)
+        this.queries.splice(this.processedQueryIndex, 1)
+
+        // Close deleted query tab if it was opened
+        const tabIndex = this.findTabIndex(this.processedQueryId)
         if (tabIndex >= 0) {
           this.$store.commit('deleteTab', tabIndex)
         }
-        if (this.selectedQueriesIds.has(this.currentQueryId)) {
-          this.selectedQueriesIds.delete(this.currentQueryId)
+
+        // Clear checkboxes
+        if (this.selectedQueriesIds.has(this.processedQueryId)) {
+          this.selectedQueriesIds.delete(this.processedQueryId)
         }
       } else {
         this.queries = this.selectAll
           ? []
           : this.queries.filter(query => !this.selectedQueriesIds.has(query.id))
+
+        // Close deleted queries if it was opened
         const tabs = this.$store.state.tabs
         for (let i = tabs.length - 1; i >= 0; i--) {
           if (this.selectedQueriesIds.has(tabs[i].id)) {
             this.$store.commit('deleteTab', i)
           }
         }
+
+        // Clear checkboxes
         this.selectedQueriesIds.clear()
       }
       this.selectedQueriesCount = this.selectedQueriesIds.size
-      this.saveQueriesInLocalStorage()
+      storedQueries.updateStorage(this.queries)
     },
     findTabIndex (id) {
       return this.$store.state.tabs.findIndex(tab => tab.id === id)
     },
-    exportQuery (index) {
-      let data
-      let name
+    exportToFile (queryList, fileName) {
+      const jsonStr = storedQueries.serialiseQueries(queryList)
+      fu.exportToFile(jsonStr, fileName)
+    },
+    exportSelectedQueries () {
+      const queryList = this.selectAll
+        ? this.allQueries
+        : this.allQueries.filter(query => this.selectedQueriesIds.has(query.id))
 
-      // single operation
-      if (typeof index === 'number') {
-        data = JSON.parse(JSON.stringify(this.showedQueries[index]))
-        name = data.name
-        delete data.isPredefined
-      } else {
-        // group operation
-        data = this.selectAll
-          ? JSON.parse(JSON.stringify(this.allQueries))
-          : this.allQueries.filter(query => this.selectedQueriesIds.has(query.id))
-        name = 'My sqliteviz queries'
-        data.forEach(query => delete query.isPredefined)
-      }
-
-      // export data to file
-      const downloader = this.$refs.downloader
-      const json = JSON.stringify(data, null, 4)
-      const blob = new Blob([json], { type: 'octet/stream' })
-      const url = window.URL.createObjectURL(blob)
-      downloader.href = url
-      downloader.download = `${name}.json`
-      downloader.click()
-      window.URL.revokeObjectURL(url)
+      this.exportToFile(queryList, 'My sqliteviz queries.json')
     },
     importQueries () {
-      const file = this.$refs.importFile.files[0]
-      const reader = new FileReader()
-      reader.onload = (e) => {
-        let importedQueries = JSON.parse(e.target.result)
-
-        if (!Array.isArray(importedQueries)) {
-          importedQueries = [importedQueries]
-        }
-
-        importedQueries.forEach(query => {
-          const allQueriesIds = this.allQueries.map(query => query.id)
-          if (new Set(allQueriesIds).has(query.id)) {
-            query.id = nanoid()
+      storedQueries.importQueries()
+        .then(importedQueries => {
+          if (this.selectAll) {
+            importedQueries.forEach(query => {
+              this.selectedQueriesIds.add(query.id)
+            })
+            this.selectedQueriesCount = this.selectedQueriesIds.size
           }
+
+          this.queries = this.queries.concat(importedQueries)
+          storedQueries.updateStorage(this.queries)
         })
-
-        if (this.selectAll) {
-          importedQueries.forEach(query => {
-            this.selectedQueriesIds.add(query.id)
-          })
-          this.selectedQueriesCount = this.selectedQueriesIds.size
-        }
-
-        this.queries = this.queries.concat(importedQueries)
-        this.saveQueriesInLocalStorage()
-        this.$refs.importFile.value = null
-      }
-      reader.readAsText(file)
-    },
-    saveQueriesInLocalStorage () {
-      localStorage.setItem('myQueries', JSON.stringify(this.queries))
     },
     toggleSelectAll (checked) {
       this.selectAll = checked
@@ -556,22 +525,11 @@ tbody tr:hover .icons-container {
 .dialog input {
   width: 100%;
 }
-a, #import-file {
-  display: none;
-}
+
 button.toolbar {
   margin-right: 16px;
 }
 
-button label {
-  display: block;
-  line-height: 36px;
-}
-
-button label:hover {
-  cursor: pointer;
-}
-
 .badge {
   display: none;
   background-color: var(--color-gray-light-4);
@@ -583,7 +541,7 @@ button label:hover {
   margin-left: 12px;
 }
 
-tbody tr.predefined:hover .badge {
+tbody tr:hover .badge {
   display: block;
 }
 #note {

tests/chart.spec.js

@@ -0,0 +1,72 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import * as chart from '@/chart'
+import * as dereference from 'react-chart-editor/lib/lib/dereference'
+
+describe('chart.js', () => {
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('getDataSourcesFromSqlResult', () => {
+    const sqlResult = {
+      columns: ['id', 'name'],
+      values: [
+        [1, 'foo'],
+        [2, 'bar']
+      ]
+    }
+
+    const ds = chart.getDataSourcesFromSqlResult(sqlResult)
+    expect(ds).to.eql({
+      id: [1, 2],
+      name: ['foo', 'bar']
+    })
+  })
+
+  it('getOptionsFromDataSources', () => {
+    const dataSources = {
+      id: [1, 2],
+      name: ['foo', 'bar']
+    }
+
+    const ds = chart.getOptionsFromDataSources(dataSources)
+    expect(ds).to.eql([
+      { value: 'id', label: 'id' },
+      { value: 'name', label: 'name' }
+    ])
+  })
+
+  it('getChartStateForSave', () => {
+    const state = {
+      data: {
+        foo: {},
+        bar: {}
+      },
+      layout: {},
+      frames: {}
+    }
+    const dataSources = {
+      id: [1, 2],
+      name: ['foo', 'bar']
+    }
+    sinon.stub(dereference, 'default')
+    sinon.spy(JSON, 'parse')
+
+    const ds = chart.getChartStateForSave(state, dataSources)
+
+    expect(dereference.default.calledOnce).to.equal(true)
+
+    const args = dereference.default.firstCall.args
+    expect(args[0]).to.eql({
+      foo: {},
+      bar: {}
+    })
+    expect(args[1]).to.eql({
+      id: [],
+      name: []
+    })
+
+    expect(ds).to.equal(JSON.parse.returnValues[0])
+  })
+})

tests/components/Chart.spec.js

@@ -0,0 +1,68 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount, shallowMount } from '@vue/test-utils'
+import Chart from '@/components/Chart.vue'
+import chart from '@/chart.js'
+import * as dereference from 'react-chart-editor/lib/lib/dereference'
+
+describe('Chart.vue', () => {
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('getChartStateForSave called with proper arguments', () => {
+    // mount the component
+    const wrapper = shallowMount(Chart)
+    const vm = wrapper.vm
+    const stub = sinon.stub(chart, 'getChartStateForSave').returns('result')
+    const chartData = vm.getChartStateForSave()
+    expect(stub.calledOnceWith(vm.state, vm.dataSources)).to.equal(true)
+    expect(chartData).to.equal('result')
+  })
+
+  it('is not visible when visible is false', () => {
+    // mount the component
+    const wrapper = shallowMount(Chart, {
+      propsData: { visible: false }
+    })
+
+    expect(wrapper.find('.chart-container').isVisible()).to.equal(false)
+  })
+
+  it('is visible when visible is true', () => {
+    // mount the component
+    const wrapper = shallowMount(Chart, {
+      propsData: { visible: true }
+    })
+
+    expect(wrapper.find('.chart-container').isVisible()).to.equal(true)
+  })
+
+  it('emits update when plotly updates', async () => {
+    // mount the component
+    const wrapper = mount(Chart)
+    wrapper.findComponent({ ref: 'plotlyEditor' }).vm.$emit('onUpdate')
+    expect(wrapper.emitted('update')).to.have.lengthOf(1)
+  })
+
+  it('calls dereference when sqlResult is changed', async () => {
+    sinon.stub(dereference, 'default')
+    const sqlResult = {
+      columns: ['id', 'name'],
+      values: [[1, 'foo']]
+    }
+
+    // mount the component
+    const wrapper = shallowMount(Chart, {
+      propsData: { sqlResult: sqlResult }
+    })
+
+    const newSqlResult = {
+      columns: ['id', 'name'],
+      values: [[2, 'bar']]
+    }
+
+    await wrapper.setProps({ sqlResult: newSqlResult })
+    expect(dereference.default.called).to.equal(true)
+  })
+})

tests/components/CheckBox.spec.js

@@ -0,0 +1,50 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import CheckBox from '@/components/CheckBox'
+
+describe('CheckBox', () => {
+  it('unchecked by default', () => {
+    const wrapper = shallowMount(CheckBox, {
+      propsData: { init: false }
+    })
+    expect(wrapper.find('img').isVisible()).to.equal(false)
+  })
+
+  it('gets init state according to passed props', () => {
+    const wrapperChecked = shallowMount(CheckBox, {
+      propsData: { init: true }
+    })
+    expect(wrapperChecked.find('img').isVisible()).to.equal(true)
+    const wrapperUnchecked = shallowMount(CheckBox, {
+      propsData: { init: false }
+    })
+    expect(wrapperUnchecked.find('img').isVisible()).to.equal(false)
+  })
+
+  it('checked on click', async () => {
+    const wrapper = shallowMount(CheckBox)
+    await wrapper.trigger('click')
+    expect(wrapper.find('img').isVisible()).to.equal(true)
+  })
+
+  it('emits event on click', async () => {
+    const wrapper = shallowMount(CheckBox)
+    await wrapper.trigger('click')
+    expect(wrapper.emitted().click).to.have.lengthOf(1)
+    expect(wrapper.emitted().click[0]).to.eql([true])
+    await wrapper.trigger('click')
+    expect(wrapper.emitted().click).to.have.lengthOf(2)
+    expect(wrapper.emitted().click[1]).to.eql([false])
+  })
+
+  it('disabled', async () => {
+    const wrapper = shallowMount(CheckBox, {
+      propsData: { disabled: true }
+    })
+    expect(wrapper.find('.checkbox-container').classes()).to.include('disabled')
+    expect(wrapper.find('.checkbox-container').classes()).to.not.include('checked')
+    await wrapper.trigger('click')
+    expect(wrapper.emitted().click).to.equal(undefined)
+    expect(wrapper.find('.checkbox-container').classes()).to.not.include('checked')
+  })
+})

tests/components/DbUploader.spec.js

@@ -0,0 +1,836 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import Vuex from 'vuex'
+import { shallowMount, mount } from '@vue/test-utils'
+import DbUploader from '@/components/DbUploader.vue'
+import fu from '@/file.utils'
+import database from '@/database'
+import csv from '@/csv'
+
+describe('DbUploader.vue', () => {
+  let state = {}
+  let mutations = {}
+  let store = {}
+
+  beforeEach(() => {
+    // mock store state and mutations
+    state = {}
+    mutations = {
+      saveSchema: sinon.stub()
+    }
+    store = new Vuex.Store({ state, mutations })
+  })
+
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('loads db on click and redirects to /editor', async () => {
+    // mock getting a file from user
+    const file = {}
+    sinon.stub(fu, 'getFileFromUser').resolves(file)
+
+    // mock db loading
+    const schema = {}
+    const db = {
+      loadDb: sinon.stub().resolves(schema)
+    }
+    sinon.stub(database, 'getNewDatabase').returns(db)
+
+    // mock router
+    const $router = { push: sinon.stub() }
+    const $route = { path: '/' }
+
+    // mount the component
+    const wrapper = shallowMount(DbUploader, {
+      store,
+      mocks: { $router, $route }
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    expect(db.loadDb.calledOnceWith(file)).to.equal(true)
+    await db.loadDb.returnValues[0]
+    expect(mutations.saveSchema.calledOnceWith(state, schema)).to.equal(true)
+    expect($router.push.calledOnceWith('/editor')).to.equal(true)
+  })
+
+  it('loads db on drop and redirects to /editor', async () => {
+    // mock db loading
+    const schema = {}
+    const db = {
+      loadDb: sinon.stub().resolves(schema)
+    }
+    sinon.stub(database, 'getNewDatabase').returns(db)
+
+    // mock router
+    const $router = { push: sinon.stub() }
+    const $route = { path: '/' }
+
+    // mount the component
+    const wrapper = shallowMount(DbUploader, {
+      store,
+      mocks: { $router, $route }
+    })
+
+    // mock a file dropped by a user
+    const file = {}
+    const dropData = { dataTransfer: new DataTransfer() }
+    Object.defineProperty(dropData.dataTransfer, 'files', {
+      value: [file],
+      writable: false
+    })
+
+    await wrapper.find('.drop-area').trigger('drop', dropData)
+    expect(db.loadDb.calledOnceWith(file)).to.equal(true)
+    await db.loadDb.returnValues[0]
+    expect(mutations.saveSchema.calledOnceWith(state, schema)).to.equal(true)
+    expect($router.push.calledOnceWith('/editor')).to.equal(true)
+  })
+
+  it("doesn't redirect if already on /editor", async () => {
+    // mock getting a file from user
+    const file = {}
+    sinon.stub(fu, 'getFileFromUser').resolves(file)
+
+    // mock db loading
+    const schema = {}
+    const db = {
+      loadDb: sinon.stub().resolves(schema)
+    }
+    sinon.stub(database, 'getNewDatabase').returns(db)
+
+    // mock router
+    const $router = { push: sinon.stub() }
+    const $route = { path: '/editor' }
+
+    // mount the component
+    const wrapper = shallowMount(DbUploader, {
+      store,
+      mocks: { $router, $route }
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await db.loadDb.returnValues[0]
+    expect($router.push.called).to.equal(false)
+  })
+})
+
+describe('DbUploader.vue import CSV', () => {
+  let state = {}
+  let mutations = {}
+  let actions = {}
+  const newTabId = 1
+  let store = {}
+
+  // mock router
+  const $router = { }
+  const $route = { path: '/' }
+
+  let clock
+  let wrapper
+
+  beforeEach(() => {
+    // mock getting a file from user
+    sinon.stub(fu, 'getFileFromUser').resolves({ type: 'text/csv' })
+
+    clock = sinon.useFakeTimers()
+
+    // mock store state and mutations
+    state = {}
+    mutations = {
+      saveSchema: sinon.stub(),
+      setDb: sinon.stub(),
+      setCurrentTabId: sinon.stub()
+    }
+    actions = {
+      addTab: sinon.stub().resolves(newTabId)
+    }
+    store = new Vuex.Store({ state, mutations, actions })
+
+    $router.push = sinon.stub()
+
+    // mount the component
+    wrapper = mount(DbUploader, {
+      store,
+      mocks: { $router, $route }
+    })
+  })
+
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('shows parse dialog if gets csv file', async () => {
+    sinon.stub(csv, 'parse').resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      messages: [{
+        code: 'UndetectableDelimiter',
+        message: 'Comma was used as a standart delimiter',
+        row: 0,
+        type: 'info',
+        hint: undefined
+      }]
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+    expect(wrapper.find('[data-modal="parse"]').exists()).to.equal(true)
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.value).to.equal('|')
+    expect(wrapper.find('#quote-char input').element.value).to.equal('"')
+    expect(wrapper.find('#escape-char input').element.value).to.equal('"')
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.checked).to.equal(true)
+    const rows = wrapper.findAll('tbody tr')
+    expect(rows).to.have.lengthOf(2)
+    expect(rows.at(0).findAll('td').at(0).text()).to.equal('1')
+    expect(rows.at(0).findAll('td').at(1).text()).to.equal('foo')
+    expect(rows.at(1).findAll('td').at(0).text()).to.equal('2')
+    expect(rows.at(1).findAll('td').at(1).text()).to.equal('bar')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.include('Information about row 0. Comma was used as a standart delimiter.')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.include('Preview parsing is completed in')
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+  })
+
+  it('reparses when parameters changes', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      }
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    parse.onCall(1).resolves({
+      delimiter: ',',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false
+    })
+    await wrapper.find('.delimiter-selector-container input').setValue(',')
+    expect(parse.callCount).to.equal(2)
+    await csv.parse.returnValues[1]
+
+    let rows = wrapper.findAll('tbody tr')
+    expect(rows).to.have.lengthOf(1)
+    expect(rows.at(0).findAll('td').at(0).text()).to.equal('2')
+    expect(rows.at(0).findAll('td').at(1).text()).to.equal('bar')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.include('Preview parsing is completed in')
+
+    parse.onCall(2).resolves({
+      delimiter: ',',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [3, 'baz']
+        ]
+      },
+      hasErrors: true,
+      messages: [{
+        code: 'MissingQuotes',
+        message: 'Quote is missed',
+        row: 0,
+        type: 'error',
+        hint: 'Edit your CSV so that the field has a closing quote char.'
+      }]
+    })
+
+    await wrapper.find('#quote-char input').setValue("'")
+    expect(parse.callCount).to.equal(3)
+    await csv.parse.returnValues[2]
+    rows = wrapper.findAll('tbody tr')
+    expect(rows).to.have.lengthOf(1)
+    expect(rows.at(0).findAll('td').at(0).text()).to.equal('3')
+    expect(rows.at(0).findAll('td').at(1).text()).to.equal('baz')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.contain('Error in row 0. Quote is missed. Edit your CSV so that the field has a closing quote char.')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.not.contain('Preview parsing is completed in')
+
+    parse.onCall(3).resolves({
+      delimiter: ',',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [4, 'qux']
+        ]
+      },
+      hasErrors: false
+    })
+    await wrapper.find('#escape-char input').setValue("'")
+    expect(parse.callCount).to.equal(4)
+    await csv.parse.returnValues[3]
+    rows = wrapper.findAll('tbody tr')
+    expect(rows).to.have.lengthOf(1)
+    expect(rows.at(0).findAll('td').at(0).text()).to.equal('4')
+    expect(rows.at(0).findAll('td').at(1).text()).to.equal('qux')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.contain('Preview parsing is completed in')
+
+    parse.onCall(4).resolves({
+      delimiter: ',',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [5, 'corge']
+        ]
+      },
+      hasErrors: false
+    })
+    await wrapper.findComponent({ name: 'check-box' }).trigger('click')
+    expect(parse.callCount).to.equal(5)
+    await csv.parse.returnValues[4]
+    rows = wrapper.findAll('tbody tr')
+    expect(rows).to.have.lengthOf(1)
+    expect(rows.at(0).findAll('td').at(0).text()).to.equal('5')
+    expect(rows.at(0).findAll('td').at(1).text()).to.equal('corge')
+    expect(wrapper.findComponent({ name: 'logs' }).text())
+      .to.include('Preview parsing is completed in')
+  })
+
+  it('has proper state before parsing is complete', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      }
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    let resolveParsing
+    parse.onCall(1).returns(new Promise(resolve => {
+      resolveParsing = resolve
+    }))
+    await wrapper.find('#csv-import').trigger('click')
+
+    // "Parsing CSV..." in the logs
+    expect(wrapper.findComponent({ name: 'logs' }).findAll('.msg').at(1).text())
+      .to.equal('Parsing CSV...')
+
+    // After 1 second - loading indicator is shown
+    await clock.tick(1000)
+    expect(
+      wrapper.findComponent({ name: 'logs' }).findComponent({ name: 'LoadingIndicator' }).exists()
+    ).to.equal(true)
+
+    // All the dialog controls are disabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(true)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+    await resolveParsing()
+    await parse.returnValues[1]
+
+    // Loading indicator is not shown when parsing is compete
+    expect(
+      wrapper.findComponent({ name: 'logs' }).findComponent({ name: 'LoadingIndicator' }).exists()
+    ).to.equal(false)
+  })
+
+  it('parsing is completed successfully', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Parsing success in the logs
+    expect(wrapper.findComponent({ name: 'logs' }).findAll('.msg').at(1).text())
+      .to.include('2 rows are parsed successfully in')
+
+    // All the dialog controls are disabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(true)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+  })
+
+  it('parsing is completed with notes', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: [{
+        code: 'UndetectableDelimiter',
+        message: 'Comma was used as a standart delimiter',
+        type: 'info',
+        hint: undefined
+      }]
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Parsing success in the logs
+    const logs = wrapper.findComponent({ name: 'logs' }).findAll('.msg')
+    expect(logs).to.have.lengthOf(4)
+    expect(logs.at(1).text()).to.include('2 rows are parsed in')
+    expect(logs.at(2).text()).to.equals('Comma was used as a standart delimiter.')
+
+    // All the dialog controls are disabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(true)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+  })
+
+  it('parsing is completed with errors', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: true,
+      messages: [{
+        code: 'Error',
+        message: 'Something is wrong',
+        type: 'error',
+        hint: undefined
+      }]
+    })
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Parsing success in the logs
+    const logs = wrapper.findComponent({ name: 'logs' }).findAll('.msg')
+    expect(logs).to.have.lengthOf(3)
+    expect(logs.at(1).text()).to.include('Parsing ended with errors.')
+    expect(logs.at(2).text()).to.equals('Something is wrong.')
+
+    // All the dialog controls are enabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(false)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+  })
+
+  it('has proper state before import is completed', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    let resolveImport = sinon.stub()
+    const newDb = {
+      createDb: sinon.stub().resolves(new Promise(resolve => { resolveImport = resolve })),
+      createProgressCounter: sinon.stub().returns(1)
+    }
+    sinon.stub(database, 'getNewDatabase').returns(newDb)
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Parsing success in the logs
+    expect(wrapper.findComponent({ name: 'logs' }).findAll('.msg').at(2).text())
+      .to.equal('Importing CSV into a SQLite database...')
+
+    // After 1 second - loading indicator is shown
+    await clock.tick(1000)
+    expect(
+      wrapper.findComponent({ name: 'logs' }).findComponent({ name: 'LoadingIndicator' }).exists()
+    ).to.equal(true)
+
+    // All the dialog controls are disabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(true)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(true)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(true)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+    expect(wrapper.find('#csv-import').isVisible()).to.equal(true)
+
+    // After resolving - loading indicator is not shown
+    await resolveImport()
+    await newDb.createDb.returnValues[0]
+    expect(
+      wrapper.findComponent({ name: 'logs' }).findComponent({ name: 'LoadingIndicator' }).exists()
+    ).to.equal(false)
+  })
+
+  it('import success', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    const schema = {}
+    const newDb = {
+      createDb: sinon.stub().resolves(schema),
+      createProgressCounter: sinon.stub().returns(1),
+      deleteProgressCounter: sinon.stub()
+    }
+    sinon.stub(database, 'getNewDatabase').returns(newDb)
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Import success in the logs
+    const logs = wrapper.findComponent({ name: 'logs' }).findAll('.msg')
+    expect(logs).to.have.lengthOf(3)
+    expect(logs.at(2).text()).to.contain('Importing CSV into a SQLite database is completed in')
+
+    // All the dialog controls are enabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(false)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(true)
+  })
+
+  it('import fails', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    const newDb = {
+      createDb: sinon.stub().rejects(new Error('fail')),
+      createProgressCounter: sinon.stub().returns(1),
+      deleteProgressCounter: sinon.stub()
+    }
+    sinon.stub(database, 'getNewDatabase').returns(newDb)
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    // Import success in the logs
+    const logs = wrapper.findComponent({ name: 'logs' }).findAll('.msg')
+    expect(logs).to.have.lengthOf(4)
+    expect(logs.at(2).text()).to.contain('Importing CSV into a SQLite database...')
+    expect(logs.at(3).text()).to.equal('Error: fail.')
+
+    // All the dialog controls are enabled
+    expect(wrapper.findComponent({ name: 'delimiter-selector' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#quote-char input').element.disabled).to.equal(false)
+    expect(wrapper.find('#escape-char input').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'check-box' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-cancel').element.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').element.disabled).to.equal(false)
+    expect(wrapper.findComponent({ name: 'close-icon' }).vm.disabled).to.equal(false)
+    expect(wrapper.find('#csv-finish').isVisible()).to.equal(false)
+  })
+
+  it('import final', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    const schema = {}
+    const newDb = {
+      createDb: sinon.stub().resolves(schema),
+      createProgressCounter: sinon.stub().returns(1),
+      deleteProgressCounter: sinon.stub()
+    }
+    sinon.stub(database, 'getNewDatabase').returns(newDb)
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-finish').trigger('click')
+
+    expect(mutations.setDb.calledOnceWith(state, newDb)).to.equal(true)
+    expect(mutations.saveSchema.calledOnceWith(state, schema)).to.equal(true)
+    expect(actions.addTab.calledOnce).to.equal(true)
+    await actions.addTab.returnValues[0]
+    expect(mutations.setCurrentTabId.calledOnceWith(state, newTabId)).to.equal(true)
+    expect($router.push.calledOnceWith('/editor')).to.equal(true)
+    expect(wrapper.find('[data-modal="parse"]').exists()).to.equal(false)
+  })
+
+  it('import cancel', async () => {
+    const parse = sinon.stub(csv, 'parse')
+    parse.onCall(0).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    parse.onCall(1).resolves({
+      delimiter: '|',
+      data: {
+        columns: ['col1', 'col2'],
+        values: [
+          [1, 'foo'],
+          [2, 'bar']
+        ]
+      },
+      hasErrors: false,
+      messages: []
+    })
+
+    const schema = {}
+    const newDb = {
+      createDb: sinon.stub().resolves(schema),
+      createProgressCounter: sinon.stub().returns(1),
+      deleteProgressCounter: sinon.stub()
+    }
+    sinon.stub(database, 'getNewDatabase').returns(newDb)
+
+    await wrapper.find('.drop-area').trigger('click')
+    await csv.parse.returnValues[0]
+    await wrapper.vm.animationPromise
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-import').trigger('click')
+    await csv.parse.returnValues[1]
+    await wrapper.vm.$nextTick()
+
+    await wrapper.find('#csv-cancel').trigger('click')
+
+    expect(mutations.setDb.called).to.equal(false)
+    expect(mutations.saveSchema.called).to.equal(false)
+    expect(actions.addTab.called).to.equal(false)
+    expect(mutations.setCurrentTabId.called).to.equal(false)
+    expect($router.push.called).to.equal(false)
+    expect(wrapper.find('[data-modal="parse"]').exists()).to.equal(false)
+  })
+})

tests/components/DelimiterSelector.spec.js

@@ -0,0 +1,109 @@
+import { expect } from 'chai'
+import { mount, shallowMount } from '@vue/test-utils'
+import DelimiterSelector from '@/components/DelimiterSelector'
+
+describe('DelimiterSelector', async () => {
+  it('shows the name of value', async () => {
+    let wrapper = shallowMount(DelimiterSelector, {
+      propsData: { value: ',' }
+    })
+    expect(wrapper.find('input').element.value).to.equal(',')
+    expect(wrapper.find('.name').text()).to.equal('comma')
+
+    wrapper = shallowMount(DelimiterSelector, {
+      propsData: { value: '\t' }
+    })
+    expect(wrapper.find('input').element.value).to.equal('\t')
+    expect(wrapper.find('.name').text()).to.equal('horizontal tab')
+
+    wrapper = shallowMount(DelimiterSelector, {
+      propsData: { value: '' }
+    })
+    expect(wrapper.find('input').element.value).to.equal('')
+    expect(wrapper.find('.name').text()).to.equal('')
+  })
+
+  it('clears the field', async () => {
+    const wrapper = mount(DelimiterSelector, {
+      propsData: { value: ',' }
+    })
+
+    await wrapper.findComponent({ name: 'clear-icon' }).trigger('click')
+
+    expect(wrapper.find('input').element.value).to.equal('')
+    expect(wrapper.emitted().input).to.equal(undefined)
+  })
+
+  it('changes value by typing', async () => {
+    const wrapper = shallowMount(DelimiterSelector, {
+      propsData: { value: ',' }
+    })
+
+    await wrapper.find('input').setValue(';')
+    expect(wrapper.emitted().input).to.have.lengthOf(1)
+    expect(wrapper.emitted().input[0]).to.eql([';'])
+  })
+
+  it('changes value by selection from the list', async () => {
+    const wrapper = mount(DelimiterSelector, {
+      propsData: { value: '|' }
+    })
+
+    await wrapper.findComponent({ name: 'drop-down-chevron' }).trigger('click')
+    expect(wrapper.find('.options').isVisible()).to.equal(true)
+    await wrapper.find('.option').trigger('click')
+    expect(wrapper.find('.options').isVisible()).to.equal(false)
+    expect(wrapper.emitted().input).to.have.lengthOf(1)
+    expect(wrapper.emitted().input[0]).to.eql([','])
+  })
+
+  it("doesn't change value when becomes empty", async () => {
+    const wrapper = mount(DelimiterSelector, {
+      propsData: { value: '|' }
+    })
+
+    await wrapper.find('input').setValue('')
+    expect(wrapper.emitted().input).to.equal(undefined)
+  })
+
+  it('set focus in input when click on character name', async () => {
+    const place = document.createElement('div')
+    document.body.appendChild(place)
+
+    const wrapper = mount(DelimiterSelector, {
+      attachTo: place,
+      propsData: { value: '|' }
+    })
+
+    await wrapper.find('.name').trigger('click')
+    expect(wrapper.find('input').element).to.equal(document.activeElement)
+    place.remove()
+    wrapper.destroy()
+  })
+
+  it('disabled', async () => {
+    const wrapper = mount(DelimiterSelector, {
+      propsData: { value: '|', disabled: true }
+    })
+
+    await wrapper.findComponent({ name: 'clear-icon' }).trigger('click')
+
+    expect(wrapper.find('input').element.value).to.equal('|')
+    expect(wrapper.emitted().input).to.equal(undefined)
+
+    await wrapper.findComponent({ name: 'drop-down-chevron' }).trigger('click')
+    expect(wrapper.find('.options').isVisible()).to.equal(false)
+  })
+
+  it('has filled class when input is not empty', async () => {
+    const wrapper = shallowMount(DelimiterSelector, {
+      propsData: { value: ',' }
+    })
+    await wrapper.vm.$nextTick()
+    expect(wrapper.find('input').classes()).to.include('filled')
+    await wrapper.find('input').setValue('')
+    expect(wrapper.find('input').classes()).to.not.include('filled')
+    await wrapper.find('input').setValue(';')
+    expect(wrapper.find('input').classes()).to.include('filled')
+  })
+})

tests/components/LoadingIndicator.spec.js

@@ -0,0 +1,24 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import LoadingIndicator from '@/components/LoadingIndicator.vue'
+
+describe('LoadingIndicator.vue', () => {
+  it('Calculates animation class', async () => {
+    const wrapper = shallowMount(LoadingIndicator, {
+      propsData: { progress: 0 }
+    })
+    expect(wrapper.find('svg').classes()).to.contain('progress')
+    await wrapper.setProps({ progress: undefined })
+    expect(wrapper.find('svg').classes()).to.not.contain('progress')
+    expect(wrapper.find('svg').classes()).to.contain('loading')
+  })
+
+  it('Calculates arc', async () => {
+    const wrapper = shallowMount(LoadingIndicator, {
+      propsData: { progress: 50 }
+    })
+    // The lendth of circle in the component is 50.24. If progress is 50% then resulting arc
+    // should be 25.12
+    expect(wrapper.find('.loader-svg.front').element.style.strokeDasharray).to.equal('25.12, 25.12')
+  })
+})

tests/components/Logs.spec.js

@@ -0,0 +1,82 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import Logs from '@/components/Logs.vue'
+
+let place
+describe('Logs.vue', () => {
+  beforeEach(() => {
+    place = document.createElement('div')
+    document.body.appendChild(place)
+  })
+  afterEach(() => {
+    place.remove()
+  })
+
+  it('Scrolled to bottom on mounted', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1' },
+      { type: 'error', message: 'msg 2' },
+      { type: 'error', message: 'msg 3' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const containerHeight = 160
+    const borderWidth = 1
+    const viewHeight = containerHeight - 2 * borderWidth
+    const wrapper = shallowMount(Logs, {
+      attachTo: place,
+      propsData: { messages, style: `height: ${containerHeight}px` }
+    })
+
+    await wrapper.vm.$nextTick()
+    const height = wrapper.find('.logs-container').element.scrollHeight
+    expect(wrapper.find('.logs-container').element.scrollTop)
+      .to.equal(height - viewHeight)
+    wrapper.destroy()
+  })
+
+  it('Scrolled to bottom when a message added', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1' },
+      { type: 'error', message: 'msg 2' },
+      { type: 'error', message: 'msg 3' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const containerHeight = 160
+    const borderWidth = 1
+    const viewHeight = containerHeight - 2 * borderWidth
+    const wrapper = shallowMount(Logs, {
+      attachTo: place,
+      propsData: { messages, style: `height: ${containerHeight}px` }
+    })
+
+    await wrapper.vm.$nextTick()
+    messages.push({ type: 'error', message: 'msg 5' })
+
+    await wrapper.vm.$nextTick()
+    const height = wrapper.find('.logs-container').element.scrollHeight
+    expect(wrapper.find('.logs-container').element.scrollTop)
+      .to.equal(height - viewHeight)
+    wrapper.destroy()
+  })
+
+  it('Serializes messages', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1.', row: 0, hint: 'Try again later.' },
+      { type: 'error', message: 'msg 2!', row: 2, hint: undefined },
+      { type: 'error', message: 'msg 3?', hint: 'Be happy!' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const wrapper = shallowMount(Logs, {
+      propsData: { messages }
+    })
+
+    const logs = wrapper.findAll('.msg')
+    expect(logs.at(0).text()).to.equal('Error in row 0. msg 1. Try again later.')
+    expect(logs.at(1).text()).to.equal('Error in row 2. msg 2!')
+    expect(logs.at(2).text()).to.equal('msg 3? Be happy!')
+    expect(logs.at(3).text()).to.equal('msg 4.')
+  })
+})

tests/components/MainMenu.spec.js

@@ -0,0 +1,654 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount, shallowMount, createWrapper } from '@vue/test-utils'
+import Vuex from 'vuex'
+import MainMenu from '@/components/MainMenu.vue'
+import storedQueries from '@/storedQueries.js'
+
+let wrapper = null
+
+describe('MainMenu.vue', () => {
+  afterEach(() => {
+    sinon.restore()
+
+    // We need explicitly destroy the component, so that beforeDestroy hook was called
+    // It's important because in this hook MainMenu component removes keydown event listener.
+    wrapper.destroy()
+  })
+
+  it('Run and Save are visible only on /editor page', async () => {
+    const state = {
+      currentTab: { query: '', execute: sinon.stub() },
+      tabs: [{}],
+      schema: []
+    }
+    const store = new Vuex.Store({ state })
+    const $route = { path: '/editor' }
+    // mount the component
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+    expect(wrapper.find('#run-btn').exists()).to.equal(true)
+    expect(wrapper.find('#run-btn').isVisible()).to.equal(true)
+    expect(wrapper.find('#save-btn').exists()).to.equal(true)
+    expect(wrapper.find('#save-btn').isVisible()).to.equal(true)
+    expect(wrapper.find('#create-btn').exists()).to.equal(true)
+    expect(wrapper.find('#create-btn').isVisible()).to.equal(true)
+
+    await wrapper.vm.$set(wrapper.vm.$route, 'path', '/my-queries')
+    expect(wrapper.find('#run-btn').exists()).to.equal(false)
+    expect(wrapper.find('#save-btn').exists()).to.equal(true)
+    expect(wrapper.find('#save-btn').isVisible()).to.equal(false)
+    expect(wrapper.find('#create-btn').exists()).to.equal(true)
+    expect(wrapper.find('#create-btn').isVisible()).to.equal(true)
+  })
+
+  it('Run and Save are not visible if there is no tabs', () => {
+    const state = {
+      currentTab: null,
+      tabs: [{}],
+      schema: []
+    }
+    const store = new Vuex.Store({ state })
+    const $route = { path: '/editor' }
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+    expect(wrapper.find('#run-btn').exists()).to.equal(false)
+    expect(wrapper.find('#save-btn').exists()).to.equal(true)
+    expect(wrapper.find('#save-btn').isVisible()).to.equal(false)
+    expect(wrapper.find('#create-btn').exists()).to.equal(true)
+    expect(wrapper.find('#create-btn').isVisible()).to.equal(true)
+  })
+
+  it('Run is disabled if there is no schema or no query', async () => {
+    const state = {
+      currentTab: { query: 'SELECT * FROM foo', execute: sinon.stub() },
+      tabs: [{}],
+      schema: null
+    }
+    const store = new Vuex.Store({ state })
+    const $route = { path: '/editor' }
+
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+    const vm = wrapper.vm
+    expect(wrapper.find('#run-btn').element.disabled).to.equal(true)
+
+    await vm.$set(state, 'schema', [])
+    expect(wrapper.find('#run-btn').element.disabled).to.equal(false)
+
+    await vm.$set(state.currentTab, 'query', '')
+    expect(wrapper.find('#run-btn').element.disabled).to.equal(true)
+  })
+
+  it('Save is disabled if current tab.isUnsaved is false', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ isUnsaved: true }],
+      schema: null
+    }
+    const store = new Vuex.Store({ state })
+    const $route = { path: '/editor' }
+
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+    const vm = wrapper.vm
+    expect(wrapper.find('#save-btn').element.disabled).to.equal(false)
+
+    await vm.$set(state.tabs[0], 'isUnsaved', false)
+    expect(wrapper.find('#save-btn').element.disabled).to.equal(true)
+  })
+
+  it('Creates a tab', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ isUnsaved: true }],
+      schema: null
+    }
+    const newQueryId = 1
+    const actions = {
+      addTab: sinon.stub().resolves(newQueryId)
+    }
+    const mutations = {
+      setCurrentTabId: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations, actions })
+    const $route = { path: '/editor' }
+    const $router = { push: sinon.stub() }
+
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route, $router },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#create-btn').trigger('click')
+    expect(actions.addTab.calledOnce).to.equal(true)
+    await actions.addTab.returnValues[0]
+    expect(mutations.setCurrentTabId.calledOnceWith(state, newQueryId)).to.equal(true)
+    expect($router.push.calledOnce).to.equal(false)
+  })
+
+  it('Creates a tab and redirects to editor', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ isUnsaved: true }],
+      schema: null
+    }
+    const newQueryId = 1
+    const actions = {
+      addTab: sinon.stub().resolves(newQueryId)
+    }
+    const mutations = {
+      setCurrentTabId: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations, actions })
+    const $route = { path: '/my-queries' }
+    const $router = { push: sinon.stub() }
+
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route, $router },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#create-btn').trigger('click')
+    expect(actions.addTab.calledOnce).to.equal(true)
+    await actions.addTab.returnValues[0]
+    expect(mutations.setCurrentTabId.calledOnceWith(state, newQueryId)).to.equal(true)
+    expect($router.push.calledOnce).to.equal(true)
+  })
+
+  it('Ctrl R calls currentTab.execute if running is enabled and route.path is "/editor"',
+    async () => {
+      const state = {
+        currentTab: {
+          query: 'SELECT * FROM foo',
+          execute: sinon.stub(),
+          tabIndex: 0
+        },
+        tabs: [{ isUnsaved: true }],
+        schema: []
+      }
+      const store = new Vuex.Store({ state })
+      const $route = { path: '/editor' }
+      const $router = { push: sinon.stub() }
+
+      wrapper = shallowMount(MainMenu, {
+        store,
+        mocks: { $route, $router },
+        stubs: ['router-link']
+      })
+
+      const ctrlR = new KeyboardEvent('keydown', { key: 'r', ctrlKey: true })
+      const metaR = new KeyboardEvent('keydown', { key: 'r', metaKey: true })
+      // Running is enabled and route path is editor
+      document.dispatchEvent(ctrlR)
+      expect(state.currentTab.execute.calledOnce).to.equal(true)
+      document.dispatchEvent(metaR)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+
+      // Running is disabled and route path is editor
+      await wrapper.vm.$set(state, 'schema', null)
+      document.dispatchEvent(ctrlR)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+      document.dispatchEvent(metaR)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+
+      // Running is enabled and route path is not editor
+      await wrapper.vm.$set(state, 'schema', [])
+      await wrapper.vm.$set($route, 'path', '/my-queries')
+      document.dispatchEvent(ctrlR)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+      document.dispatchEvent(metaR)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+    })
+
+  it('Ctrl Enter calls currentTab.execute if running is enabled and route.path is "/editor"',
+    async () => {
+      const state = {
+        currentTab: {
+          query: 'SELECT * FROM foo',
+          execute: sinon.stub(),
+          tabIndex: 0
+        },
+        tabs: [{ isUnsaved: true }],
+        schema: []
+      }
+      const store = new Vuex.Store({ state })
+      const $route = { path: '/editor' }
+      const $router = { push: sinon.stub() }
+
+      wrapper = shallowMount(MainMenu, {
+        store,
+        mocks: { $route, $router },
+        stubs: ['router-link']
+      })
+
+      const ctrlEnter = new KeyboardEvent('keydown', { key: 'Enter', ctrlKey: true })
+      const metaEnter = new KeyboardEvent('keydown', { key: 'Enter', metaKey: true })
+      // Running is enabled and route path is editor
+      document.dispatchEvent(ctrlEnter)
+      expect(state.currentTab.execute.calledOnce).to.equal(true)
+      document.dispatchEvent(metaEnter)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+
+      // Running is disabled and route path is editor
+      await wrapper.vm.$set(state, 'schema', null)
+      document.dispatchEvent(ctrlEnter)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+      document.dispatchEvent(metaEnter)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+
+      // Running is enabled and route path is not editor
+      await wrapper.vm.$set(state, 'schema', [])
+      await wrapper.vm.$set($route, 'path', '/my-queries')
+      document.dispatchEvent(ctrlEnter)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+      document.dispatchEvent(metaEnter)
+      expect(state.currentTab.execute.calledTwice).to.equal(true)
+    })
+
+  it('Ctrl B calls createNewQuery', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ isUnsaved: true }],
+      schema: []
+    }
+    const store = new Vuex.Store({ state })
+    const $route = { path: '/editor' }
+
+    wrapper = shallowMount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+    sinon.stub(wrapper.vm, 'createNewQuery')
+
+    const ctrlB = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true })
+    const metaB = new KeyboardEvent('keydown', { key: 'b', metaKey: true })
+    document.dispatchEvent(ctrlB)
+    expect(wrapper.vm.createNewQuery.calledOnce).to.equal(true)
+    document.dispatchEvent(metaB)
+    expect(wrapper.vm.createNewQuery.calledTwice).to.equal(true)
+
+    await wrapper.vm.$set($route, 'path', '/my-queries')
+    document.dispatchEvent(ctrlB)
+    expect(wrapper.vm.createNewQuery.calledThrice).to.equal(true)
+    document.dispatchEvent(metaB)
+    expect(wrapper.vm.createNewQuery.callCount).to.equal(4)
+  })
+
+  it('Ctrl S calls checkQueryBeforeSave if the tab is unsaved and route path is /editor',
+    async () => {
+      const state = {
+        currentTab: {
+          query: 'SELECT * FROM foo',
+          execute: sinon.stub(),
+          tabIndex: 0
+        },
+        tabs: [{ isUnsaved: true }],
+        schema: []
+      }
+      const store = new Vuex.Store({ state })
+      const $route = { path: '/editor' }
+
+      wrapper = shallowMount(MainMenu, {
+        store,
+        mocks: { $route },
+        stubs: ['router-link']
+      })
+      sinon.stub(wrapper.vm, 'checkQueryBeforeSave')
+
+      const ctrlS = new KeyboardEvent('keydown', { key: 's', ctrlKey: true })
+      const metaS = new KeyboardEvent('keydown', { key: 's', metaKey: true })
+      // tab is unsaved and route is /editor
+      document.dispatchEvent(ctrlS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledOnce).to.equal(true)
+      document.dispatchEvent(metaS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledTwice).to.equal(true)
+
+      // tab is saved and route is /editor
+      await wrapper.vm.$set(state.tabs[0], 'isUnsaved', false)
+      document.dispatchEvent(ctrlS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledTwice).to.equal(true)
+      document.dispatchEvent(metaS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledTwice).to.equal(true)
+
+      // tab is unsaved and route is not /editor
+      await wrapper.vm.$set($route, 'path', '/my-queries')
+      await wrapper.vm.$set(state.tabs[0], 'isUnsaved', true)
+      document.dispatchEvent(ctrlS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledTwice).to.equal(true)
+      document.dispatchEvent(metaS)
+      expect(wrapper.vm.checkQueryBeforeSave.calledTwice).to.equal(true)
+    })
+
+  it('Saves the query when no need the new name',
+    async () => {
+      const state = {
+        currentTab: {
+          query: 'SELECT * FROM foo',
+          execute: sinon.stub(),
+          tabIndex: 0
+        },
+        tabs: [{ id: 1, name: 'foo', isUnsaved: true }],
+        schema: []
+      }
+      const mutations = {
+        updateTab: sinon.stub()
+      }
+      const store = new Vuex.Store({ state, mutations })
+      const $route = { path: '/editor' }
+      sinon.stub(storedQueries, 'isTabNeedName').returns(false)
+      sinon.stub(storedQueries, 'save').returns({
+        name: 'foo',
+        id: 1,
+        query: 'SELECT * FROM foo',
+        chart: []
+      })
+
+      wrapper = mount(MainMenu, {
+        store,
+        mocks: { $route },
+        stubs: ['router-link']
+      })
+
+      await wrapper.find('#save-btn').trigger('click')
+
+      // check that the dialog is closed
+      expect(wrapper.find('[data-modal="save"]').exists()).to.equal(false)
+
+      // check that the query was saved via storedQueries.save (newName='')
+      expect(storedQueries.save.calledOnceWith(state.currentTab, '')).to.equal(true)
+
+      // check that the tab was updated
+      expect(mutations.updateTab.calledOnceWith(state, sinon.match({
+        index: 0,
+        name: 'foo',
+        id: 1,
+        query: 'SELECT * FROM foo',
+        chart: [],
+        isUnsaved: false
+      }))).to.equal(true)
+
+      // check that 'querySaved' event was triggered on $root
+      expect(createWrapper(wrapper.vm.$root).emitted('querySaved')).to.have.lengthOf(1)
+    })
+
+  it('Shows en error when the new name is needed but not specifyied', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ id: 1, name: null, tempName: 'Untitled', isUnsaved: true }],
+      schema: []
+    }
+    const mutations = {
+      updateTab: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations })
+    const $route = { path: '/editor' }
+    sinon.stub(storedQueries, 'isTabNeedName').returns(true)
+    sinon.stub(storedQueries, 'save').returns({
+      name: 'foo',
+      id: 1,
+      query: 'SELECT * FROM foo',
+      chart: []
+    })
+
+    wrapper = mount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#save-btn').trigger('click')
+
+    // check that the dialog is open
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(true)
+
+    // find Save in the dialog and click
+    await wrapper
+      .findAll('.dialog-buttons-container button').wrappers
+      .find(button => button.text() === 'Save')
+      .trigger('click')
+
+    // check that we have an error message and dialog is still open
+    expect(wrapper.find('.text-field-error').text()).to.equal('Query name can\'t be empty')
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(true)
+  })
+
+  it('Saves the query with a new name', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ id: 1, name: null, tempName: 'Untitled', isUnsaved: true }],
+      schema: []
+    }
+    const mutations = {
+      updateTab: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations })
+    const $route = { path: '/editor' }
+    sinon.stub(storedQueries, 'isTabNeedName').returns(true)
+    sinon.stub(storedQueries, 'save').returns({
+      name: 'foo',
+      id: 1,
+      query: 'SELECT * FROM foo',
+      chart: []
+    })
+
+    wrapper = mount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#save-btn').trigger('click')
+
+    // check that the dialog is open
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(true)
+
+    // enter the new name
+    await wrapper.find('.dialog-body input').setValue('foo')
+
+    // find Save in the dialog and click
+    await wrapper
+      .findAll('.dialog-buttons-container button').wrappers
+      .find(button => button.text() === 'Save')
+      .trigger('click')
+
+    // check that the dialog is closed
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(false)
+
+    // check that the query was saved via storedQueries.save (newName='foo')
+    expect(storedQueries.save.calledOnceWith(state.currentTab, 'foo')).to.equal(true)
+
+    // check that the tab was updated
+    expect(mutations.updateTab.calledOnceWith(state, sinon.match({
+      index: 0,
+      name: 'foo',
+      id: 1,
+      query: 'SELECT * FROM foo',
+      chart: [],
+      isUnsaved: false
+    }))).to.equal(true)
+
+    // check that 'querySaved' event was triggered on $root
+    expect(createWrapper(wrapper.vm.$root).emitted('querySaved')).to.have.lengthOf(1)
+  })
+
+  it('Saves a predefined query with a new name', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0,
+        isPredefined: true,
+        result: {
+          columns: ['id', 'name'],
+          values: [
+            [1, 'Harry Potter'],
+            [2, 'Drako Malfoy']
+          ]
+        },
+        view: 'chart'
+      },
+      tabs: [{ id: 1, name: 'foo', isUnsaved: true, isPredefined: true }],
+      schema: []
+    }
+    const mutations = {
+      updateTab: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations })
+    const $route = { path: '/editor' }
+    sinon.stub(storedQueries, 'isTabNeedName').returns(true)
+    sinon.stub(storedQueries, 'save').returns({
+      name: 'bar',
+      id: 2,
+      query: 'SELECT * FROM foo',
+      chart: []
+    })
+
+    wrapper = mount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#save-btn').trigger('click')
+
+    // check that the dialog is open
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(true)
+
+    // check that save-note is visible (save-note is an explanation why do we need a new name)
+    expect(wrapper.find('#save-note').isVisible()).to.equal(true)
+
+    // enter the new name
+    await wrapper.find('.dialog-body input').setValue('bar')
+
+    // find Save in the dialog and click
+    await wrapper
+      .findAll('.dialog-buttons-container button').wrappers
+      .find(button => button.text() === 'Save')
+      .trigger('click')
+
+    // check that the dialog is closed
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(false)
+
+    // check that the query was saved via storedQueries.save (newName='bar')
+    expect(storedQueries.save.calledOnceWith(state.currentTab, 'bar')).to.equal(true)
+
+    // check that the tab was updated
+    expect(mutations.updateTab.calledOnceWith(state, sinon.match({
+      index: 0,
+      name: 'bar',
+      id: 2,
+      query: 'SELECT * FROM foo',
+      chart: [],
+      isUnsaved: false
+    }))).to.equal(true)
+
+    // check that 'querySaved' event was triggered on $root
+    expect(createWrapper(wrapper.vm.$root).emitted('querySaved')).to.have.lengthOf(1)
+
+    // We saved predefined query, so the tab will be created again
+    // (because of new id) and it will be without sql result and has default view - table.
+    // That's why we need to restore data and view.
+    // Check that result and view are preserved in the currentTab:
+    expect(state.currentTab.view).to.equal('chart')
+    expect(state.currentTab.result).to.eql({
+      columns: ['id', 'name'],
+      values: [
+        [1, 'Harry Potter'],
+        [2, 'Drako Malfoy']
+      ]
+    })
+  })
+
+  it('Cancel saving', async () => {
+    const state = {
+      currentTab: {
+        query: 'SELECT * FROM foo',
+        execute: sinon.stub(),
+        tabIndex: 0
+      },
+      tabs: [{ id: 1, name: null, tempName: 'Untitled', isUnsaved: true }],
+      schema: []
+    }
+    const mutations = {
+      updateTab: sinon.stub()
+    }
+    const store = new Vuex.Store({ state, mutations })
+    const $route = { path: '/editor' }
+    sinon.stub(storedQueries, 'isTabNeedName').returns(true)
+    sinon.stub(storedQueries, 'save').returns({
+      name: 'bar',
+      id: 2,
+      query: 'SELECT * FROM foo',
+      chart: []
+    })
+
+    wrapper = mount(MainMenu, {
+      store,
+      mocks: { $route },
+      stubs: ['router-link']
+    })
+
+    await wrapper.find('#save-btn').trigger('click')
+
+    // check that the dialog is open
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(true)
+
+    // find Cancel in the dialog and click
+    await wrapper
+      .findAll('.dialog-buttons-container button').wrappers
+      .find(button => button.text() === 'Cancel')
+      .trigger('click')
+
+    // check that the dialog is closed
+    expect(wrapper.find('[data-modal="save"]').exists()).to.equal(false)
+
+    // check that the query was not saved via storedQueries.save
+    expect(storedQueries.save.called).to.equal(false)
+
+    // check that the tab was not updated
+    expect(mutations.updateTab.called).to.equal(false)
+
+    // check that 'querySaved' event is not listened on $root
+    expect(wrapper.vm.$root.$listeners).to.not.have.property('querySaved')
+  })
+})

tests/components/Pager.spec.js

@@ -0,0 +1,37 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount } from '@vue/test-utils'
+import Pager from '@/components/Pager.vue'
+
+describe('Pager.vue', () => {
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('emits input event with a page', async () => {
+    const wrapper = mount(Pager, {
+      propsData: {
+        pageCount: 5
+      }
+    })
+
+    // click on 'next page' link
+    await wrapper.find('.paginator-next').trigger('click')
+    expect(wrapper.emitted('input')[0]).to.eql([2])
+
+    // click on the link to page 3 (it has index 2)
+    await wrapper.findAll('.paginator-page-link').at(2).trigger('click')
+    expect(wrapper.emitted('input')[1]).to.eql([3])
+  })
+
+  it('changes the page when value is changed', async () => {
+    const wrapper = mount(Pager, {
+      propsData: {
+        pageCount: 5
+      }
+    })
+
+    await wrapper.setProps({ value: 5 })
+    expect(wrapper.emitted('input')[0]).to.eql([5])
+  })
+})

tests/components/Schema.spec.js

@@ -0,0 +1,101 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount, createLocalVue } from '@vue/test-utils'
+import Vuex from 'vuex'
+import Schema from '@/components/Schema.vue'
+import TableDescription from '@/components/TableDescription.vue'
+
+const localVue = createLocalVue()
+localVue.use(Vuex)
+
+describe('Schema.vue', () => {
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('Renders DB name on initial', () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB'
+    }
+    const store = new Vuex.Store({ state })
+
+    // mout the component
+    const wrapper = mount(Schema, { store, localVue })
+
+    // check DB name and schema visibility
+    expect(wrapper.find('.db-name').text()).to.equal('fooDB')
+    expect(wrapper.find('.schema').isVisible()).to.equal(true)
+  })
+
+  it('Schema visibility is toggled when click on DB name', async () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB'
+    }
+    const store = new Vuex.Store({ state })
+
+    // mout the component
+    const wrapper = mount(Schema, { store, localVue })
+
+    // click and check visibility
+    await wrapper.find('.db-name').trigger('click')
+    expect(wrapper.find('.schema').isVisible()).to.equal(false)
+    await wrapper.find('.db-name').trigger('click')
+    expect(wrapper.find('.schema').isVisible()).to.equal(true)
+  })
+
+  it('Schema filter', async () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB',
+      schema: [
+        {
+          name: 'foo',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'title', type: 'NVARCHAR(24)' }
+          ]
+        },
+        {
+          name: 'bar',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'price', type: 'INTEGER' }
+          ]
+        },
+        {
+          name: 'foobar',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'price', type: 'INTEGER' }
+          ]
+        }
+      ]
+    }
+    const store = new Vuex.Store({ state })
+
+    // mount the component
+    const wrapper = mount(Schema, { store, localVue })
+
+    // apply filters and check the list of tables
+    await wrapper.find('#schema-filter input').setValue('foo')
+    let tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(2)
+    expect(tables.at(0).vm.name).to.equal('foo')
+    expect(tables.at(1).vm.name).to.equal('foobar')
+
+    await wrapper.find('#schema-filter input').setValue('bar')
+    tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(2)
+    expect(tables.at(0).vm.name).to.equal('bar')
+    expect(tables.at(1).vm.name).to.equal('foobar')
+
+    await wrapper.find('#schema-filter input').setValue('')
+    tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(3)
+    expect(tables.at(0).vm.name).to.equal('foo')
+    expect(tables.at(1).vm.name).to.equal('bar')
+    expect(tables.at(2).vm.name).to.equal('foobar')
+  })
+})

tests/components/Splitpanes.spec.js

@@ -0,0 +1,220 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import Splitpanes from '@/components/Splitpanes.vue'
+
+describe('Splitpanes.vue', () => {
+  it('renders correctly - vertical', () => {
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 60, max: 100 },
+        after: { size: 40, max: 100 }
+      }
+    })
+
+    expect(wrapper.findAll('.splitpanes-pane')).to.have.lengthOf(2)
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('60%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.width).to.equal('40%')
+  })
+
+  it('renders correctly - horizontal', () => {
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 60, max: 100 },
+        after: { size: 40, max: 100 },
+        horizontal: true
+      }
+    })
+
+    expect(wrapper.findAll('.splitpanes-pane')).to.have.lengthOf(2)
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.height).to.equal('60%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.height).to.equal('40%')
+  })
+
+  it('toggles correctly', async () => {
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 60, max: 100 },
+        after: { size: 40, max: 100 }
+      }
+    })
+
+    await wrapper.find('.toggle-btn').trigger('click')
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('0%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.width).to.equal('100%')
+
+    await wrapper.find('.toggle-btn').trigger('click')
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('60%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.width).to.equal('40%')
+
+    await wrapper.findAll('.toggle-btn').at(1).trigger('click')
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('100%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.width).to.equal('0%')
+
+    await wrapper.find('.toggle-btn').trigger('click')
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('60%')
+    expect(wrapper.findAll('.splitpanes-pane').at(1).element.style.width).to.equal('40%')
+  })
+
+  it('drag - vertical', async () => {
+    const root = document.createElement('div')
+    const place = document.createElement('div')
+    root.style.width = '600px'
+    root.style.height = '500px'
+    root.appendChild(place)
+    document.body.appendChild(root)
+
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      attachTo: place,
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 60, max: 100 },
+        after: { size: 40, max: 100 }
+      }
+    })
+
+    await wrapper.find('.splitpanes-splitter').trigger('mousedown')
+    document.dispatchEvent(new MouseEvent('mousemove', {
+      clientX: 300,
+      clientY: 80
+    }))
+    document.dispatchEvent(new MouseEvent('mouseup'))
+    await wrapper.vm.$nextTick()
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('50%')
+    wrapper.destroy()
+    root.remove()
+  })
+
+  it('drag - horizontal', async () => {
+    const root = document.createElement('div')
+    const place = document.createElement('div')
+    root.style.width = '600px'
+    root.style.height = '500px'
+    root.appendChild(place)
+    document.body.appendChild(root)
+
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      attachTo: place,
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 10, max: 100 },
+        after: { size: 90, max: 100 },
+        horizontal: true
+      }
+    })
+
+    await wrapper.find('.splitpanes-splitter').trigger('mousedown')
+    document.dispatchEvent(new MouseEvent('mousemove', {
+      clientX: 10,
+      clientY: 250
+    }))
+    document.dispatchEvent(new MouseEvent('mouseup'))
+    await wrapper.vm.$nextTick()
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.height).to.equal('50%')
+    wrapper.destroy()
+    root.remove()
+  })
+
+  it('drag - horizontal - touch', async () => {
+    const root = document.createElement('div')
+    const place = document.createElement('div')
+    root.style.width = '600px'
+    root.style.height = '500px'
+    root.appendChild(place)
+    document.body.appendChild(root)
+
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      attachTo: place,
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 10, max: 100 },
+        after: { size: 90, max: 100 },
+        horizontal: true
+      }
+    })
+
+    window.ontouchstart = null
+    await wrapper.find('.splitpanes-splitter').trigger('touchstart')
+    const event = new TouchEvent('touchmove')
+    Object.defineProperty(event, 'touches', {
+      value: [{
+        clientX: 10,
+        clientY: 250
+      }],
+      writable: true
+    })
+    document.dispatchEvent(event)
+    document.dispatchEvent(new MouseEvent('touchend'))
+    await wrapper.vm.$nextTick()
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.height).to.equal('50%')
+    wrapper.destroy()
+    root.remove()
+    delete window.ontouchstart
+  })
+
+  it('drag - vertical - touch', async () => {
+    const root = document.createElement('div')
+    const place = document.createElement('div')
+    root.style.width = '600px'
+    root.style.height = '500px'
+    root.appendChild(place)
+    document.body.appendChild(root)
+
+    // mount the component
+    const wrapper = shallowMount(Splitpanes, {
+      attachTo: place,
+      slots: {
+        leftPane: '<div />',
+        rightPane: '<div />'
+      },
+      propsData: {
+        before: { size: 60, max: 100 },
+        after: { size: 40, max: 100 }
+      }
+    })
+    window.ontouchstart = null
+
+    await wrapper.find('.splitpanes-splitter').trigger('touchstart')
+    const event = new TouchEvent('touchmove')
+    Object.defineProperty(event, 'touches', {
+      value: [{
+        clientX: 300,
+        clientY: 80
+      }],
+      writable: true
+    })
+    document.dispatchEvent(event)
+    document.dispatchEvent(new MouseEvent('touchend'))
+    await wrapper.vm.$nextTick()
+    expect(wrapper.findAll('.splitpanes-pane').at(0).element.style.width).to.equal('50%')
+    wrapper.destroy()
+    root.remove()
+    delete window.ontouchstart
+  })
+})

tests/components/SqlEditor.spec.js

@@ -0,0 +1,11 @@
+import { expect } from 'chai'
+import { mount } from '@vue/test-utils'
+import SqlEditor from '@/components/SqlEditor.vue'
+
+describe('SqlEditor.vue', () => {
+  it('Emits input event when a query is changed', async () => {
+    const wrapper = mount(SqlEditor)
+    await wrapper.findComponent({ name: 'codemirror' }).vm.$emit('input', 'SELECT * FROM foo')
+    expect(wrapper.emitted('input')[0]).to.eql(['SELECT * FROM foo'])
+  })
+})

tests/components/Tab.spec.js

@@ -0,0 +1,246 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount } from '@vue/test-utils'
+import { mutations } from '@/store'
+import Vuex from 'vuex'
+import Tab from '@/components/Tab.vue'
+
+describe('Tab.vue', () => {
+  it('Renders passed query', () => {
+    // mock store state
+    const state = {
+      currentTabId: 1
+    }
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1,
+        initName: 'foo',
+        initQuery: 'SELECT * FROM foo',
+        initChart: [],
+        tabIndex: 0,
+        isPredefined: false
+      }
+    })
+    expect(wrapper.find('.tab-content-container').isVisible()).to.equal(true)
+    expect(wrapper.find('.table-view').isVisible()).to.equal(true)
+    expect(wrapper.find('.table-view .result-before').isVisible()).to.equal(true)
+    expect(wrapper.find('.query-editor').text()).to.equal('SELECT * FROM foo')
+  })
+
+  it("Doesn't render tab when it's not active", () => {
+    // mock store state
+    const state = {
+      currentTabId: 0
+    }
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1
+      }
+    })
+    expect(wrapper.find('.tab-content-container').isVisible()).to.equal(false)
+  })
+
+  it("Shows chart when view equals 'chart'", async () => {
+    // mock store state
+    const state = {
+      currentTabId: 1
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1
+      }
+    })
+
+    expect(wrapper.findComponent({ ref: 'chart' }).vm.visible).to.equal(false)
+    await wrapper.setData({ view: 'chart' })
+    expect(wrapper.find('.table-view').isVisible()).to.equal(false)
+    expect(wrapper.findComponent({ ref: 'chart' }).vm.visible).to.equal(true)
+  })
+
+  it('Is not visible when not active', async () => {
+    // mock store state
+    const state = {
+      currentTabId: 0
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1
+      }
+    })
+
+    expect(wrapper.find('.tab-content-container').isVisible()).to.equal(false)
+  })
+
+  it('Calls setCurrentTab when becomes active', async () => {
+    // mock store state
+    const state = {
+      currentTabId: 0
+    }
+    sinon.spy(mutations, 'setCurrentTab')
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1
+      }
+    })
+
+    state.currentTabId = 1
+    expect(mutations.setCurrentTab.calledOnceWith(state, wrapper.vm)).to.equal(true)
+  })
+
+  it('Update tab state when a query is changed', async () => {
+    // mock store state
+    const state = {
+      tabs: [
+        { id: 1, name: 'foo', query: 'SELECT * FROM foo', chart: [], isUnsaved: false }
+      ],
+      currentTabId: 1
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1,
+        initName: 'foo',
+        initQuery: 'SELECT * FROM foo',
+        initChart: [],
+        tabIndex: 0,
+        isPredefined: false
+      }
+    })
+    await wrapper.findComponent({ name: 'SqlEditor' }).vm.$emit('input', ' limit 100')
+    expect(state.tabs[0].isUnsaved).to.equal(true)
+  })
+
+  it('Shows .result-in-progress message when executing query', (done) => {
+    // mock store state
+    const state = {
+      currentTabId: 1,
+      db: {
+        execute () { return new Promise(() => {}) }
+      }
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1,
+        initName: 'foo',
+        initQuery: 'SELECT * FROM foo',
+        initChart: [],
+        tabIndex: 0,
+        isPredefined: false
+      }
+    })
+
+    wrapper.vm.execute()
+    wrapper.vm.$nextTick(() => {
+      expect(wrapper.find('.table-view .result-before').isVisible()).to.equal(false)
+      expect(wrapper.find('.table-view .result-in-progress').isVisible()).to.equal(true)
+    })
+    done()
+  })
+
+  it('Shows error when executing query ends with error', async () => {
+    // mock store state
+    const state = {
+      currentTabId: 1,
+      db: {
+        execute () { return Promise.reject(new Error('There is no table foo')) }
+      }
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1,
+        initName: 'foo',
+        initQuery: 'SELECT * FROM foo',
+        initChart: [],
+        tabIndex: 0,
+        isPredefined: false
+      }
+    })
+
+    await wrapper.vm.execute()
+    expect(wrapper.find('.table-view .result-before').isVisible()).to.equal(false)
+    expect(wrapper.find('.table-view .result-in-progress').isVisible()).to.equal(false)
+    expect(wrapper.find('.table-preview.error').isVisible()).to.equal(true)
+    expect(wrapper.find('.table-preview.error').text()).to.include('There is no table foo')
+  })
+
+  it('Passes result to sql-table component', async () => {
+    // mock store state
+    const state = {
+      currentTabId: 1,
+      db: {
+        execute () { return Promise.resolve(result) }
+      }
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+    const result = {
+      columns: ['id', 'name'],
+      values: [
+        [1, 'foo'],
+        [2, 'bar']
+      ]
+    }
+
+    // mount the component
+    const wrapper = mount(Tab, {
+      store,
+      stubs: ['chart'],
+      propsData: {
+        id: 1,
+        initName: 'foo',
+        initQuery: 'SELECT * FROM foo',
+        initChart: [],
+        tabIndex: 0,
+        isPredefined: false
+      }
+    })
+
+    await wrapper.vm.execute()
+    expect(wrapper.find('.table-view .result-before').isVisible()).to.equal(false)
+    expect(wrapper.find('.table-view .result-in-progress').isVisible()).to.equal(false)
+    expect(wrapper.find('.table-preview.error').isVisible()).to.equal(false)
+    expect(wrapper.findComponent({ name: 'SqlTable' }).vm.dataSet).to.eql(result)
+  })
+})

tests/components/TableDescription.spec.js

@@ -0,0 +1,37 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import TableDescription from '@/components/TableDescription.vue'
+
+describe('TableDescription.vue', () => {
+  it('Initially the columns are hidden and table name is rendered', () => {
+    const wrapper = shallowMount(TableDescription, {
+      propsData: {
+        name: 'Test table',
+        columns: [
+          { name: 'id', type: 'number' },
+          { name: 'title', type: 'nvarchar(24)' }
+        ]
+      }
+    })
+    expect(wrapper.find('.table-name').text()).to.equal('Test table')
+    expect(wrapper.find('.columns').isVisible()).to.equal(false)
+  })
+
+  it('Columns are visible and correct when click on table name', async () => {
+    const wrapper = shallowMount(TableDescription, {
+      propsData: {
+        name: 'Test table',
+        columns: [
+          { name: 'id', type: 'number' },
+          { name: 'title', type: 'nvarchar(24)' }
+        ]
+      }
+    })
+    await wrapper.find('.table-name').trigger('click')
+
+    expect(wrapper.find('.columns').isVisible()).to.equal(true)
+    expect(wrapper.findAll('.column').length).to.equal(2)
+    expect(wrapper.findAll('.column').at(0).text()).to.include('id').and.include('number')
+    expect(wrapper.findAll('.column').at(1).text()).to.include('title').and.include('nvarchar(24)')
+  })
+})