Register client as browser's default magnet handler

client/src/app/add-new-torrent/add-new-torrent.component.ts

@@ -3,6 +3,7 @@ import { Router } from '@angular/router';
 import { TorrentService } from 'src/app/torrent.service';
 import { Torrent, TorrentFileAvailability } from '../models/torrent.model';
 import { SettingsService } from '../settings.service';
+import { ActivatedRoute } from '@angular/router';
 
 @Component({
   selector: 'app-add-new-torrent',
@@ -48,9 +49,15 @@ export class AddNewTorrentComponent implements OnInit {
     private router: Router,
     private torrentService: TorrentService,
     private settingsService: SettingsService,
+    private activatedRoute: ActivatedRoute
   ) {}
 
   ngOnInit(): void {
+    this.activatedRoute.queryParams.subscribe(params => {
+      if (params['magnet']) {
+        this.magnetLink = decodeURIComponent(params['magnet']);
+      }
+    });
     this.settingsService.get().subscribe((settings) => {
       const providerSetting = settings.first((m) => m.key === 'Provider:Provider');
       this.provider = providerSetting.enumValues[providerSetting.value as number];

client/src/app/navbar/navbar.component.html

@@ -38,6 +38,12 @@
         </span>
         <span>Settings</span>
       </a>
+      <button class="navbar-item" type="button" (click)="registerMagnetHandler()">
+        <span class="icon">
+          <i class="fas fa-magnet" aria-hidden="true"></i>
+        </span>
+        <span>Register Magnet Handler</span>
+      </button>      
       <a class="navbar-item" *ngIf="profile" href="{{ providerLink }}" target="_blank" rel="noopener">
         <span class="icon">
           <i class="fas fa-euro-sign" aria-hidden="true"></i>

client/src/app/navbar/navbar.component.ts

@@ -57,6 +57,22 @@ export class NavbarComponent implements OnInit {
     });
   }
 
+  public registerMagnetHandler(): void {
+    if (window.location.protocol !== "https:") {
+      alert("Magnet link registration requires a secure connection. Please ensure your site is being served over HTTPS to enable this feature.");
+      return;
+    }
+
+    const handlerUrl = `${window.location.origin}/add?magnet=%s`;
+
+    if (navigator.registerProtocolHandler) {
+      navigator.registerProtocolHandler("magnet", handlerUrl);
+      alert("Your browser will display a prompt asking if you'd like to add the client as the default application for magnet links. Please confirm to complete the setup.");
+    } else {
+      alert("Magnet link registration failed. Your browser does not support registering custom protocol handlers.");
+    }
+  }
+
   public logout(): void {
     this.authService.logout().subscribe(
       () => {