From e6c991b8bbfd87f05ac602d28356368ae4353e51 Mon Sep 17 00:00:00 2001
From: Abhinav <abhinavk.grd@gmail.com>
Date: Thu, 23 Feb 2023 13:56:17 +0530
Subject: [PATCH] setup event emitter and api to attach event listener

---
 src/api/system.ts   | 7 +++++++
 src/main.ts         | 2 ++
 src/preload.ts      | 2 ++
 src/utils/events.ts | 8 ++++++++
 4 files changed, 19 insertions(+)
 create mode 100644 src/utils/events.ts

diff --git a/src/api/system.ts b/src/api/system.ts
index fb4d68264..abb4e1a20 100644
--- a/src/api/system.ts
+++ b/src/api/system.ts
@@ -20,6 +20,13 @@ export const registerUpdateEventListener = (
     });
 };
 
+export const registerForegroundEventListener = (onForeground: () => void) => {
+    ipcRenderer.removeAllListeners('app-in-foreground');
+    ipcRenderer.on('app-in-foreground', () => {
+        onForeground();
+    });
+};
+
 export const updateAndRestart = () => {
     ipcRenderer.send('update-and-restart');
 };
diff --git a/src/main.ts b/src/main.ts
index ecc48658d..9ba08291b 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -20,6 +20,7 @@ import { initSentry } from './services/sentry';
 import { setupLogging } from './utils/logging';
 import { isDev } from './utils/common';
 import { setupMainProcessStatsLogger } from './utils/processStats';
+import { setupAppEventEmitter } from './utils/events';
 
 let mainWindow: BrowserWindow;
 
@@ -82,6 +83,7 @@ if (!gotTheLock) {
         handleDownloads(mainWindow);
         handleExternalLinks(mainWindow);
         addAllowOriginHeader(mainWindow);
+        setupAppEventEmitter(mainWindow);
     });
 
     app.on('before-quit', () => setIsAppQuitting(true));
diff --git a/src/preload.ts b/src/preload.ts
index 32204839f..a3ef17f83 100644
--- a/src/preload.ts
+++ b/src/preload.ts
@@ -6,6 +6,7 @@ import {
     updateAndRestart,
     skipAppUpdate,
     muteUpdateNotification,
+    registerForegroundEventListener,
 } from './api/system';
 import {
     showUploadDirsDialog,
@@ -111,4 +112,5 @@ windowObject['ElectronAPIs'] = {
     muteUpdateNotification,
     generateImageThumbnail,
     logRendererProcessMemoryUsage,
+    registerForegroundEventListener,
 };
diff --git a/src/utils/events.ts b/src/utils/events.ts
new file mode 100644
index 000000000..6ce259639
--- /dev/null
+++ b/src/utils/events.ts
@@ -0,0 +1,8 @@
+import { BrowserWindow } from 'electron';
+
+export function setupAppEventEmitter(mainWindow: BrowserWindow) {
+    // fire event when mainWindow is in foreground
+    mainWindow.on('focus', () => {
+        mainWindow.webContents.send('app-in-foreground');
+    });
+}