Support tg:// deeplinks in Electron (#3807)

src/components/main/Main.tsx

@@ -394,6 +394,12 @@ const Main: FC<OwnProps & StateProps> = ({
     }
   }, []);
 
+  useEffect(() => {
+    return window.electron?.on(ElectronEvent.DEEPLINK, (link: string) => {
+      processDeepLink(decodeURIComponent(link));
+    });
+  }, []);
+
   useEffect(() => {
     const parsedLocationHash = parseLocationHash();
     if (!parsedLocationHash) return;

src/electron/config.yml

@@ -1,9 +1,9 @@
-productName: "Telegram A"
-artifactName: "${productName}-${arch}.${ext}"
-appId: "org.telegram.TelegramA"
+productName: Telegram A
+artifactName: ${productName}-${arch}.${ext}
+appId: org.telegram.TelegramA
 extraMetadata:
-  main: "./dist/electron.js"
-  productName: "Telegram A"
+  main: ./dist/electron.js
+  productName: Telegram A
 files:
   - "dist"
   - "package.json"
@@ -14,40 +14,47 @@ files:
   - "!dist/get"
   - "!node_modules"
 directories:
-  buildResources: "./public"
-  output: "./dist-electron"
+  buildResources: ./public
+  output: ./dist-electron
+protocols:
+  - name: Tg
+    schemes:
+      - tg
 publish:
-  provider: "github"
-  owner: "Ajaxy"
-  repo: "telegram-tt"
-  releaseType: "draft"
+  provider: github
+  owner: Ajaxy
+  repo: telegram-tt
+  releaseType: draft
 win:
-  target: "nsis"
-  icon: "public/icon-electron-windows.ico"
+  target: nsis
+  icon: public/icon-electron-windows.ico
 nsis:
   oneClick: false
   createDesktopShortcut: true
   createStartMenuShortcut: true
 mac:
   target:
-    target: "default"
-    arch: ["x64", "arm64"]
-  entitlements: "public/electron-entitlements.mac.plist"
-  icon: "public/icon-electron-macos.icns"
+    target: default
+    arch:
+      - x64
+      - arm64
+  entitlements: public/electron-entitlements.mac.plist
+  icon: public/icon-electron-macos.icns
   notarize:
-    teamId: "Y54Z4K69Z9"
+    teamId: Y54Z4K69Z9
 dmg:
-  title: "Telegram A installer"
-  background: "public/background-electron-dmg.tiff"
+  title: Telegram A installer
+  background: public/background-electron-dmg.tiff
   iconSize: 100
   contents:
     - x: 138
       y: 225
-      type: "file"
+      type: file
     - x: 402
       y: 225
-      type: "link"
+      type: link
       path: "/Applications"
 linux:
-  category: "Community"
-  target: ["AppImage"]
+  category: Community
+  target:
+    - AppImage

src/electron/deeplink.ts

@@ -0,0 +1,78 @@
+import { app } from 'electron';
+import path from 'path';
+
+import { ElectronEvent } from '../types/electron';
+
+import {
+  IS_LINUX, IS_MAC_OS, IS_WINDOWS, windows,
+} from './utils';
+
+const TG_PROTOCOL = 'tg';
+
+let deeplinkUrl: string | undefined;
+
+export function initDeeplink() {
+  const currentWindow = Array.from(windows).pop();
+
+  if (process.defaultApp) {
+    if (process.argv.length >= 2) {
+      app.setAsDefaultProtocolClient(TG_PROTOCOL, process.execPath, [path.resolve(process.argv[1])]);
+    }
+  } else {
+    app.setAsDefaultProtocolClient(TG_PROTOCOL);
+  }
+
+  const gotTheLock = app.requestSingleInstanceLock();
+
+  if (!gotTheLock) {
+    app.quit();
+
+    return;
+  }
+
+  app.on('will-finish-launching', () => {
+    app.on('open-url', (event: Event, url: string) => {
+      event.preventDefault();
+      deeplinkUrl = url;
+      processDeeplink();
+    });
+  });
+
+  if (IS_WINDOWS || IS_LINUX) {
+    deeplinkUrl = findDeeplink(process.argv);
+  }
+
+  app.on('second-instance', (_, argv: string[]) => {
+    if (IS_MAC_OS) {
+      deeplinkUrl = argv[0];
+    } else {
+      deeplinkUrl = findDeeplink(argv);
+    }
+
+    processDeeplink();
+
+    if (currentWindow) {
+      if (currentWindow.isMinimized()) {
+        currentWindow.restore();
+      }
+
+      currentWindow.focus();
+    }
+  });
+}
+
+export function processDeeplink() {
+  const currentWindow = Array.from(windows).pop();
+
+  if (!currentWindow || !deeplinkUrl) {
+    return;
+  }
+
+  currentWindow.webContents.send(ElectronEvent.DEEPLINK, deeplinkUrl);
+
+  deeplinkUrl = undefined;
+}
+
+function findDeeplink(args: string[]) {
+  return args.find((arg) => arg.startsWith(`${TG_PROTOCOL}://`));
+}

src/electron/main.ts

@@ -4,9 +4,12 @@ import { app, nativeImage } from 'electron';
 import contextMenu from 'electron-context-menu';
 import path from 'path';
 
+import { initDeeplink } from './deeplink';
 import { createWindow, setupCloseHandlers, setupElectronActionHandlers } from './window';
 import { IS_MAC_OS, IS_WINDOWS } from './utils';
 
+initDeeplink();
+
 contextMenu({
   showLearnSpelling: false,
   showLookUpSelection: false,

src/electron/window.ts

@@ -7,6 +7,7 @@ import path from 'path';
 import { ElectronAction, ElectronEvent } from '../types/electron';
 import type { TrafficLightPosition } from '../types/electron';
 import setupAutoUpdates from './autoUpdates';
+import { processDeeplink } from './deeplink';
 import {
   forceQuit, getAppTitle, IS_MAC_OS, TRAFFIC_LIGHT_POSITION, windows,
 } from './utils';
@@ -123,6 +124,7 @@ export function createWindow(url?: string) {
 
   window.webContents.once('dom-ready', () => {
     window.show();
+    processDeeplink();
 
     if (process.env.APP_ENV === 'production') {
       setupAutoUpdates(window, windowState);

src/types/electron.ts

@@ -2,6 +2,7 @@ export enum ElectronEvent {
   FULLSCREEN_CHANGE = 'fullscreen-change',
   UPDATE_ERROR = 'update-error',
   UPDATE_DOWNLOADED = 'update-downloaded',
+  DEEPLINK = 'deeplink',
 }
 
 export enum ElectronAction {