Faster WebSocket reconnects

ts/main/powerChannel.ts

@@ -0,0 +1,26 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { powerMonitor } from 'electron';
+
+export type InitializeOptions = {
+  send(event: string): void;
+};
+
+export class PowerChannel {
+  private static isInitialized = false;
+
+  static initialize({ send }: InitializeOptions): void {
+    if (PowerChannel.isInitialized) {
+      throw new Error('PowerChannel already initialized');
+    }
+    PowerChannel.isInitialized = true;
+
+    powerMonitor.on('suspend', () => {
+      send('power-channel:suspend');
+    });
+    powerMonitor.on('resume', () => {
+      send('power-channel:resume');
+    });
+  }
+}