refactoring manipulations with My queries

src/storedQueries.js

@@ -0,0 +1,83 @@
+import { nanoid } from 'nanoid'
+
+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 isFromScratch || queryTab.isPredefined
+  },
+
+  save (queryTab, newName) {
+    const value = {
+      id: queryTab.isPredefined ? nanoid() : queryTab.id,
+      query: queryTab.query,
+      chart: queryTab.getChartSatateForSave(),
+      name: newName || queryTab.initName
+    }
+
+    const isNeedName = this.isTabNeedName(queryTab)
+
+    // Get queries from local storage
+    let myQueries = this.getStoredQueries()
+
+    // Set createdAt
+    if (isNeedName) {
+      value.createdAt = new Date()
+    } else {
+      var queryIndex = myQueries.findIndex(oldQuery => oldQuery.id === queryTab.id)
+      value.createdAt = myQueries[queryIndex].createdAt
+    }
+
+    // Insert in queries list
+    if (!myQueries) {
+      myQueries = [value]
+    } else if (isNeedName) {
+      myQueries.push(value)
+    } else {
+      myQueries[queryIndex] = value
+    }
+
+    // Save to local storage
+    this.updateStorage(myQueries)
+    return value
+  },
+
+  updateStorage (value) {
+    localStorage.setItem('myQueries', JSON.stringify(value))
+  },
+
+  export (data) {
+    // Create downloader
+    const downloader = document.createElement('a')
+    downloader.style.display = 'none'
+    document.body.appendChild(downloader)
+
+    // Prepare data
+    const name = data.name || 'My sqlitevis queries'
+    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`
+
+    // Trigger click
+    downloader.click()
+
+    // Clear
+    window.URL.revokeObjectURL(url)
+    downloader.remove()
+  }
+}