IDB fixes

CHANGELOG.md

@@ -42,7 +42,10 @@ This is a **massive** new update to WatermelonDB! 🍉
 - [LokiJS] Introduces new `new LokiJSAdapter({ ..., useWebWorker: false })` option. Before, web workers
   were always used with `LokiJSAdapter`. Although web workers may have some performance benefits, disabling them
   may lead to lower memory consumption, lower latency, and easier debugging. YMMV.
-
+- [LokiJS] Added `onIndexedDBVersionChange` option to `LokiJSAdapter`. This is a callback that's called
+  when internal IDB version changed (most likely the database was deleted in another browser tab).
+  Pass a callback to force log out in this copy of the app as well. Note that this only works when
+  using incrementalIDB and not using web workers
 - [Model] Add `Model._dangerouslySetRawWithoutMarkingColumnChange()` method. You probably shouldn't use it,
   but if you know what you're doing and want to live-update records from server without marking record as updated,
   this is useful

docs-master/Installation.md

@@ -20,10 +20,10 @@ npm install @nozbe/with-observables
     yarn add --dev @babel/plugin-proposal-decorators
     ```
     or
-    
+
     ```bash
     npm install -D @babel/plugin-proposal-decorators
-    
+
 2. Add ES6 decorators support to your `.babelrc` file:
     ```json
     {
@@ -38,9 +38,9 @@ npm install @nozbe/with-observables
 ### iOS (React Native)
 
 1. **Set up Babel config in your project**
-   
+
    See instructions above ⬆️
-   
+
 2. **Add Swift support to your Xcode project**:
    - Open `ios/YourAppName.xcodeproj` in Xcode
    - Right-click on **Your App Name** in the Project Navigator on the left, and click **New File…**
@@ -59,21 +59,21 @@ npm install @nozbe/with-observables
 
     1. Open your project in Xcode, right click on **Libraries** in the Project Navigator on the left and click **Add Files to "Your Project Name"**. Look under `node_modules/@nozbe/watermelondb/native/ios` and select `WatermelonDB.xcodeproj`
     2. Go to Project settings (top item in the Project navigator on the left), select your app name under **Targets** → **Build Phases** → **Link Binary With Libraries**, and add `libWatermelonDB.a`
-    
+
     For more information about linking libraries manually, [see React Native documentation](https://facebook.github.io/react-native/docs/linking-libraries-ios).
-    
+
     **Using CocoaPods**
-    
+
     [Please contribute!](https://github.com/Nozbe/WatermelonDB/issues/279)
 
 Note that Xcode 9.4 and a deployment target of at least iOS 9.0 is required (although Xcode 10 and iOS 11.0 are recommended).
 
 ### Android (React Native)
 
 1. **Set up Babel config in your project**
-   
+
    See instructions above ⬆️
-   
+
 1. In `android/settings.gradle`, add:
 
    ```gradle
@@ -141,11 +141,11 @@ This guide assumes you use Webpack as your bundler.
     yarn add --dev worker-loader
     ```
     or
-    
+
     ```bash
     npm install -D worker-loader
     ```
-    
+
 2. And add this to Webpack configuration:
     ```js
     // webpack.config.js
@@ -241,6 +241,12 @@ import LokiJSAdapter from '@nozbe/watermelondb/adapters/lokijs'
 
 const adapter = new LokiJSAdapter({
   schema,
+  // useWebWorker: false,
+  // experimentalUseIncrementalIndexedDB: true,
+  // onIndexedDBVersionChange: () => {
+  //   // database was deleted in another browser tab
+  //   services.forceLogOut()
+  // },
 })
 
 // The rest is the same!

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@nozbe/watermelondb",
   "description": "Build powerful React Native and React web apps that scale from hundreds to tens of thousands of records and remain fast",
-  "version": "0.15.0-8",
+  "version": "0.15.0-10",
   "scripts": {
     "build": "NODE_ENV=production node ./scripts/make.js",
     "dev": "NODE_ENV=development node ./scripts/make.js",
@@ -40,7 +40,7 @@
   },
   "dependencies": {
     "lodash.clonedeep": "^4.5.0",
-    "lokijs": "git+https://github.com/Nozbe/LokiJS.git#f9f6f73c4bfe1d6df27c99d7a5e18f730754e904",
+    "lokijs": "git+https://github.com/Nozbe/LokiJS.git#384b80f",
     "rambdax": "2.15.0",
     "rxjs": "^6.2.2",
     "rxjs-compat": "^6.3.2",

src/adapters/lokijs/index.js

@@ -42,6 +42,10 @@ export type LokiAdapterOptions = $Exact<{
   // may lead to lower memory consumption, lower latency, and easier debugging
   useWebWorker?: boolean,
   experimentalUseIncrementalIndexedDB?: boolean,
+  // Called when internal IDB version changed (most likely the database was deleted in another browser tab)
+  // Pass a callback to force log out in this copy of the app as well
+  // Note that this only works when using incrementalIDB and not using web workers
+  onIndexedDBVersionChange?: () => void,
   // -- internal --
   _testLokiAdapter?: LokiMemoryAdapter,
 }>

src/adapters/lokijs/worker/executor.js

@@ -35,6 +35,8 @@ export default class LokiExecutor {
 
   experimentalUseIncrementalIndexedDB: boolean
 
+  onIndexedDBVersionChange: ?(() => void)
+
   _testLokiAdapter: ?LokiMemoryAdapter
 
   cachedRecords: Map<TableName<any>, Set<RecordId>> = new Map()
@@ -45,6 +47,7 @@ export default class LokiExecutor {
     this.schema = schema
     this.migrations = migrations
     this.experimentalUseIncrementalIndexedDB = options.experimentalUseIncrementalIndexedDB || false
+    this.onIndexedDBVersionChange = options.onIndexedDBVersionChange
     this._testLokiAdapter = _testLokiAdapter
   }
 
@@ -236,6 +239,7 @@ export default class LokiExecutor {
       this.dbName,
       this._testLokiAdapter,
       this.experimentalUseIncrementalIndexedDB,
+      this.onIndexedDBVersionChange,
     )
 
     logger.log('[DB][Worker] Database loaded')

src/adapters/lokijs/worker/lokiExtensions.js

@@ -11,23 +11,36 @@ const isIDBAvailable = () => {
     }
 
     // in Firefox private mode, IDB will be available, but will fail to open
-    const db = indexedDB.open('WatermelonIDBChecker')
-    db.onsuccess = () => resolve(true)
-    db.onerror = () => resolve(false)
+    const checkRequest: IDBOpenDBRequest = indexedDB.open('WatermelonIDBChecker')
+    checkRequest.onsuccess = e => {
+      const db: IDBDatabase = e.target.result
+      db.close()
+      resolve(true)
+    }
+    checkRequest.onerror = () => {
+      resolve(false)
+    }
+    checkRequest.onblocked = () => {
+      // eslint-disable-next-line no-console
+      console.error('WatermelonIDBChecker call is blocked')
+    }
   })
 }
 
 async function getLokiAdapter(
   name: ?string,
   adapter: ?LokiMemoryAdapter,
   useIncrementalIDB: boolean,
+  onIndexedDBVersionChange: ?(() => void),
 ): mixed {
   if (adapter) {
     return adapter
   } else if (await isIDBAvailable()) {
     if (useIncrementalIDB) {
       const IncrementalIDBAdapter = require('lokijs/src/incremental-indexeddb-adapter')
-      return new IncrementalIDBAdapter()
+      return new IncrementalIDBAdapter({
+        onversionchange: onIndexedDBVersionChange,
+      })
     }
     const LokiIndexedAdapter = require('lokijs/src/loki-indexed-adapter')
     return new LokiIndexedAdapter(name)
@@ -42,9 +55,10 @@ export async function newLoki(
   name: ?string,
   adapter: ?LokiMemoryAdapter,
   useIncrementalIDB: boolean,
+  onIndexedDBVersionChange: ?(() => void),
 ): Loki {
   const loki = new Loki(name, {
-    adapter: await getLokiAdapter(name, adapter, useIncrementalIDB),
+    adapter: await getLokiAdapter(name, adapter, useIncrementalIDB, onIndexedDBVersionChange),
     autosave: true,
     autosaveInterval: 250,
     verbose: true,