reset

src/app/components/telegram-login/telegram-login.component.ts

@@ -19,48 +19,92 @@ export class TelegramLoginComponent implements OnDestroy {
   webSessionID = signal('');
   qrStatus = signal<'loading' | 'ready' | 'expired' | 'error'>('loading');
   encodedQrUrl = computed(() => encodeURIComponent(this.loginUrl()));
+  awaitingTelegramReturn = signal(false);
 
   private readonly pollIntervalMs = 5000;
   private pollTimer?: ReturnType<typeof setInterval>;
+  private mobileFallbackTimeout?: ReturnType<typeof setTimeout>;
+  private launchFrame?: HTMLIFrameElement;
+  private readonly handleVisibilityChange = () => {
+    if (typeof document !== 'undefined' && document.visibilityState === 'hidden') {
+      this.clearMobileLaunchArtifacts();
+      return;
+    }
+
+    this.checkLoginAfterReturn();
+  };
+  private readonly handleWindowFocus = () => {
+    this.checkLoginAfterReturn();
+  };
+  private readonly handlePageShow = () => {
+    this.checkLoginAfterReturn();
+  };
 
   constructor() {
     effect(() => {
       if (this.showDialog()) {
         this.initQrLogin();
       } else {
+        this.awaitingTelegramReturn.set(false);
+        this.clearMobileLaunchArtifacts();
         this.stopPolling();
       }
     });
+
+    if (typeof window !== 'undefined') {
+      document.addEventListener('visibilitychange', this.handleVisibilityChange);
+      window.addEventListener('focus', this.handleWindowFocus);
+      window.addEventListener('pageshow', this.handlePageShow);
+    }
   }
 
   ngOnDestroy(): void {
+    this.awaitingTelegramReturn.set(false);
+    this.clearMobileLaunchArtifacts();
     this.stopPolling();
+
+    if (typeof window !== 'undefined') {
+      document.removeEventListener('visibilitychange', this.handleVisibilityChange);
+      window.removeEventListener('focus', this.handleWindowFocus);
+      window.removeEventListener('pageshow', this.handlePageShow);
+    }
   }
 
   close(): void {
+    this.awaitingTelegramReturn.set(false);
+    this.clearMobileLaunchArtifacts();
     this.authService.hideLogin();
     this.stopPolling();
   }
 
   openTelegramLogin(): void {
     const url = this.loginUrl();
-    if (!url) return;
-
-    window.open(url, '_blank');
-    if (!this.pollTimer) {
     const webSessionID = this.webSessionID();
-      if (webSessionID) {
+    if (!url || !webSessionID) return;
+
+    if (!this.pollTimer) {
       this.startPolling(webSessionID);
     }
+
+    if (this.isMobileBrowser()) {
+      this.awaitingTelegramReturn.set(true);
+      this.launchTelegramApp(webSessionID);
+      return;
     }
+
+    window.open(url, '_blank', 'noopener,noreferrer');
   }
 
   refreshQr(): void {
+    this.awaitingTelegramReturn.set(false);
+    this.clearMobileLaunchArtifacts();
     this.stopPolling();
     this.initQrLogin();
   }
 
   private initQrLogin(): void {
+    this.awaitingTelegramReturn.set(false);
+    this.clearMobileLaunchArtifacts();
     this.qrStatus.set('loading');
     this.loginUrl.set('');
     this.webSessionID.set('');
@@ -94,6 +138,8 @@ export class TelegramLoginComponent implements OnDestroy {
       this.authService.checkSessionOnce(webSessionID).subscribe({
         next: (session) => {
           if (session?.active) {
+            this.awaitingTelegramReturn.set(false);
+            this.clearMobileLaunchArtifacts();
             this.stopPolling();
             this.authService.onTelegramLoginComplete();
           }
@@ -111,4 +157,73 @@ export class TelegramLoginComponent implements OnDestroy {
       this.pollTimer = undefined;
     }
   }
+
+  private checkLoginAfterReturn(): void {
+    if (!this.showDialog() || !this.awaitingTelegramReturn()) {
+      return;
+    }
+
+    const webSessionID = this.webSessionID();
+    if (!webSessionID) {
+      this.awaitingTelegramReturn.set(false);
+      return;
+    }
+
+    if (!this.pollTimer) {
+      this.startPolling(webSessionID);
+    }
+
+    this.authService.checkSessionOnce(webSessionID).subscribe(session => {
+      if (session?.active) {
+        this.awaitingTelegramReturn.set(false);
+        this.clearMobileLaunchArtifacts();
+        this.stopPolling();
+        this.authService.onTelegramLoginComplete();
+      }
+    });
+  }
+
+  private launchTelegramApp(webSessionID: string): void {
+    if (typeof document === 'undefined') {
+      return;
+    }
+
+    this.clearMobileLaunchArtifacts();
+
+    this.launchFrame = document.createElement('iframe');
+    this.launchFrame.style.display = 'none';
+    this.launchFrame.setAttribute('aria-hidden', 'true');
+    this.launchFrame.setAttribute('tabindex', '-1');
+    this.launchFrame.src = this.authService.getTelegramAppLoginUrl(webSessionID);
+    document.body.appendChild(this.launchFrame);
+
+    this.mobileFallbackTimeout = setTimeout(() => {
+      this.removeLaunchFrame();
+    }, 1400);
+  }
+
+  private clearMobileLaunchArtifacts(): void {
+    if (this.mobileFallbackTimeout) {
+      clearTimeout(this.mobileFallbackTimeout);
+      this.mobileFallbackTimeout = undefined;
+    }
+
+    this.removeLaunchFrame();
+  }
+
+  private removeLaunchFrame(): void {
+    this.launchFrame?.remove();
+    this.launchFrame = undefined;
+  }
+
+  private isMobileBrowser(): boolean {
+    if (typeof navigator === 'undefined') {
+      return false;
+    }
+
+    const userAgent = navigator.userAgent || navigator.vendor;
+    const isTouchMac = navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1;
+
+    return /Android|iPhone|iPad|iPod|IEMobile|Opera Mini/i.test(userAgent) || isTouchMac;
+  }
 }

src/app/services/auth.service.ts

@@ -84,10 +84,16 @@ export class AuthService {
 
   /** Generate the Telegram login URL for bot-based auth */
   getTelegramLoginUrl(webSessionID = this.generateGuid()): string {
-    const botUsername = (environment as Record<string, unknown>)['telegramBot'] as string || 'DexarSupport_bot';
+    const botUsername = this.getTelegramBotUsername();
     return `https://t.me/${botUsername}?start=${encodeURIComponent(webSessionID)}`;
   }
 
+  /** Generate a Telegram app deep link for mobile login without opening a browser tab. */
+  getTelegramAppLoginUrl(webSessionID: string): string {
+    const botUsername = this.getTelegramBotUsername();
+    return `tg://resolve?domain=${encodeURIComponent(botUsername)}&start=${encodeURIComponent(webSessionID)}`;
+  }
+
   /** Get QR code data URL for Telegram login */
   getTelegramQrUrl(): string {
     return this.getTelegramLoginUrl();
@@ -348,4 +354,8 @@ export class AuthService {
 
     document.cookie = `${WEB_SESSION_COOKIE}=; Max-Age=0; Path=/; SameSite=Lax`;
   }
+
+  private getTelegramBotUsername(): string {
+    return (environment as Record<string, unknown>)['telegramBot'] as string || 'DexarSupport_bot';
+  }
 }