Create backup file in web worker when opening project (for testing pu…

…rposes) [build]

desktop/angular.json

@@ -89,7 +89,9 @@
             "extractLicenses": false,
             "buildOptimizer": false,
             "optimization": false,
-            "namedChunks": true
+            "namedChunks": true,
+            "webWorkerTsConfig": "tsconfig.worker.json",
+            "preserveSymlinks": true
           },
           "configurations": {
             "en": {

desktop/electron/main.js

@@ -244,6 +244,7 @@ const createWindow = () => {
         minHeight: 600,
         webPreferences: {
             nodeIntegration: true,
+            nodeIntegrationInWorker: true,
             enableRemoteModule: true,
             contextIsolation: false,
             preload: require('path').join(electron.app.getAppPath(), 'electron/preload.js'),

desktop/src/app/components/app.component.ts

@@ -72,6 +72,12 @@ export class AppComponent {
         if (!Settings.hasUsername(settingsProvider.getSettings())) {
             this.menuModalLauncher.openUpdateUsernameModal(true);
         }
+
+        const projectName: string = settingsProvider.getSettings().selectedProject;
+        const backupDirectoryPath: string = remote.getGlobal('appDataPath') + '/backup';
+        const worker = new Worker(new URL('./app.worker', import.meta.url));
+        worker.onmessage = ({ data }) => console.log(data);
+        worker.postMessage({ projectName, backupDirectoryPath });
     }
 
 

desktop/src/app/components/app.worker.ts

@@ -0,0 +1,37 @@
+/// <reference lib="webworker" />
+
+const replicationStream = require('../../../node_modules/pouchdb-replication-stream/dist/pouchdb.replication-stream');
+const stream = require('stream');
+const fs = require('fs');
+const PouchDB = require('pouchdb-browser').default;
+
+
+addEventListener('message', async ({ data }) => {
+
+    const projectName: string = data.projectName;
+    const backupDirectoryPath: string = data.backupDirectoryPath;
+    const targetFilePath: string = backupDirectoryPath + '/' + projectName + '.jsonl';
+
+    if (!fs.existsSync(backupDirectoryPath)) fs.mkdirSync(backupDirectoryPath);
+
+    await dump(targetFilePath, projectName);
+
+    const response = 'Backup of project ' + projectName + ' successful!';
+    postMessage(response);
+});
+
+
+export async function dump(filePath: string, project: string) {
+
+    PouchDB.plugin(replicationStream.plugin);
+    (PouchDB as any).adapter('writableStream', replicationStream.adapters.writableStream);
+
+    let dumpedString = '';
+    const memoryStream = new stream.Writable();
+    memoryStream._write = (chunk: any, _: any, done: any) => {
+        dumpedString += chunk.toString().replace(/"data"[\s\S]+?,/g,'\"data\":\"\",');
+        done();
+    };
+    await new PouchDB(project).dump(memoryStream, { attachments: false });
+    fs.writeFileSync(filePath, dumpedString);
+}

desktop/tsconfig.worker.json

@@ -0,0 +1,15 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/worker",
+    "lib": [
+      "es2018",
+      "webworker"
+    ],
+    "types": []
+  },
+  "include": [
+    "src/**/*.worker.ts",
+    "node_modules/idai-field-core/**/*.d.ts"
+  ]
+}