add dataBase lib

src/dataBase.js

@@ -0,0 +1,46 @@
+import store from '@/store'
+import router from '@/router'
+const worker = new Worker('js/worker.sql-wasm.js')
+
+export default {
+  loadDb (file) {
+    const dbName = file.name
+    store.commit('saveDbName', dbName)
+    const f = file
+    const r = new FileReader()
+    r.onload = () => {
+      worker.onmessage = () => {
+        const getSchemaSql = `
+          SELECT name, sql
+          FROM sqlite_master
+          WHERE type='table' AND name NOT LIKE 'sqlite_%';`
+        worker.onmessage = event => {
+          store.commit('saveSchema', event.data.results[0].values)
+          if (router.currentRoute.path !== '/editor') {
+            router.push('/editor')
+          }
+        }
+        worker.postMessage({ action: 'exec', sql: getSchemaSql })
+      }
+      store.commit('saveDbFile', r.result)
+      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 })
+    })
+  }
+}