Expose Electron powerMonitor API to extensions (#4844)

src/extensions/main-api/index.ts

@@ -6,6 +6,7 @@
 import * as Catalog from "./catalog";
 import * as Navigation from "./navigation";
 import * as K8sApi from "./k8s-api";
+import * as Power from "./power";
 import { IpcMain as Ipc } from "../ipc/ipc-main";
 import { LensMainExtension as LensExtension } from "../lens-main-extension";
 
@@ -15,4 +16,5 @@ export {
   K8sApi,
   Ipc,
   LensExtension,
+  Power,
 };

src/extensions/main-api/power.ts

+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { powerMonitor } from "electron";
+import type { Disposer } from "../../common/utils/disposer";
+
+/**
+ * Event listener for system power events
+ */
+export type PowerEventListener = () => void;
+
+/**
+ * Adds event listener to system suspend events
+ * @param listener function which will be called on system suspend
+ * @returns function to remove event listener
+ */
+export const onSuspend = (listener: PowerEventListener): Disposer => {
+  powerMonitor.on("suspend", listener);
+
+  return () => {
+    powerMonitor.off("suspend", listener);
+  };
+};
+
+/**
+ * Adds event listener to system resume event
+ * @param listener function which will be called on system resume
+ * @returns function to remove event listener
+ */
+export const onResume = (listener: PowerEventListener): Disposer => {
+  powerMonitor.on("resume", listener);
+
+  return () => {
+    powerMonitor.off("resume", listener);
+  };
+};
+
+/**
+ * Adds event listener to the event which is emitted when
+ * the system is about to reboot or shut down
+ * @param listener function which will be called on system shutdown
+ * @returns function to remove event listener
+ */
+export const onShutdown = (listener: PowerEventListener): Disposer => {
+  powerMonitor.on("shutdown", listener);
+
+  return () => {
+    powerMonitor.off("shutdown", listener);
+  };
+};