Attempt to flush the rageshake logs on close

... so that we get to see what happened in the last 30s.

electron_app/src/electron-main.js

@@ -242,6 +242,9 @@ electron.app.on('activate', () => {
 
 electron.app.on('before-quit', () => {
     global.appQuitting = true;
+    if (mainWindow) {
+        mainWindow.webContents.send('before-quit');
+    }
 });
 
 // Set the App User Model ID to match what the squirrel

src/vector/index.js

@@ -45,6 +45,12 @@ rageshake.init().then(() => {
     console.error("Failed to initialise rageshake: " + err);
 });
 
+window.addEventListener('beforeunload', (e) => {
+    console.log('riot-web closing');
+    // try to flush the logs to indexeddb
+    rageshake.flush();
+});
+
 
  // add React and ReactPerf to the global namespace, to make them easier to
  // access via the console

src/vector/platform/ElectronPlatform.js

@@ -22,9 +22,16 @@ import dis from 'matrix-react-sdk/lib/dispatcher';
 import { _t } from 'matrix-react-sdk/lib/languageHandler';
 import q from 'q';
 import {remote, ipcRenderer} from 'electron';
+import rageshake from '../rageshake';
 
 remote.autoUpdater.on('update-downloaded', onUpdateDownloaded);
 
+// try to flush the rageshake logs to indexeddb before quit.
+ipcRenderer.on('before-quit', function () {
+    console.log('riot-desktop closing');
+    rageshake.flush();
+});
+
 function onUpdateDownloaded(ev: Event, releaseNotes: string, ver: string, date: Date, updateURL: string) {
     dis.dispatch({
         action: 'new_version',

src/vector/rageshake.js

@@ -427,6 +427,13 @@ module.exports = {
         return initPromise;
     },
 
+    flush: function() {
+        if (!store) {
+            return;
+        }
+        store.flush();
+    },
+
     /**
      * Clean up old logs.
      * @return Promise Resolves if cleaned logs.