Private servers with password and invite links (Experimental)

src/app/features/invite/invite.component.ts

@@ -0,0 +1,192 @@
+import {
+  Component,
+  OnInit,
+  inject,
+  signal
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { ActivatedRoute, Router } from '@angular/router';
+import { firstValueFrom } from 'rxjs';
+import { Store } from '@ngrx/store';
+import { RoomsActions } from '../../store/rooms/rooms.actions';
+import { UsersActions } from '../../store/users/users.actions';
+import { selectCurrentUser } from '../../store/users/users.selectors';
+import { ServerDirectoryService, ServerInviteInfo } from '../../core/services/server-directory.service';
+import { STORAGE_KEY_CURRENT_USER_ID } from '../../core/constants';
+import { DatabaseService } from '../../core/services/database.service';
+import { User } from '../../core/models/index';
+
+@Component({
+  selector: 'app-invite',
+  standalone: true,
+  imports: [CommonModule],
+  templateUrl: './invite.component.html'
+})
+export class InviteComponent implements OnInit {
+  readonly currentUser = inject(Store).selectSignal(selectCurrentUser);
+  readonly invite = signal<ServerInviteInfo | null>(null);
+  readonly status = signal<'loading' | 'redirecting' | 'joining' | 'error'>('loading');
+  readonly message = signal('Loading invite…');
+
+  private readonly route = inject(ActivatedRoute);
+  private readonly router = inject(Router);
+  private readonly store = inject(Store);
+  private readonly serverDirectory = inject(ServerDirectoryService);
+  private readonly databaseService = inject(DatabaseService);
+
+  async ngOnInit(): Promise<void> {
+    const inviteContext = this.resolveInviteContext();
+
+    if (!inviteContext) {
+      return;
+    }
+
+    const currentUserId = localStorage.getItem(STORAGE_KEY_CURRENT_USER_ID);
+
+    if (!currentUserId) {
+      await this.redirectToLogin();
+      return;
+    }
+
+    try {
+      await this.joinInvite(inviteContext, currentUserId);
+    } catch (error: unknown) {
+      this.applyInviteError(error);
+    }
+  }
+
+  goToSearch(): void {
+    this.router.navigate(['/search']).catch(() => {});
+  }
+
+  private buildEndpointName(sourceUrl: string): string {
+    try {
+      const url = new URL(sourceUrl);
+
+      return url.hostname;
+    } catch {
+      return 'Signal Server';
+    }
+  }
+
+  private applyInviteError(error: unknown): void {
+    const inviteError = error as {
+      error?: { error?: string; errorCode?: string };
+    };
+    const errorCode = inviteError?.error?.errorCode;
+    const fallbackMessage = inviteError?.error?.error || 'Unable to accept this invite.';
+
+    this.status.set('error');
+
+    if (errorCode === 'BANNED') {
+      this.message.set('You are banned from this server and cannot accept this invite.');
+
+      return;
+    }
+
+    if (errorCode === 'INVITE_EXPIRED') {
+      this.message.set('This invite has expired. Ask for a fresh invite link.');
+
+      return;
+    }
+
+    this.message.set(fallbackMessage);
+  }
+
+  private async hydrateCurrentUser(): Promise<User | null> {
+    const currentUser = this.currentUser();
+
+    if (currentUser) {
+      return currentUser;
+    }
+
+    const storedUser = await this.databaseService.getCurrentUser();
+
+    if (storedUser) {
+      this.store.dispatch(UsersActions.setCurrentUser({ user: storedUser }));
+    }
+
+    return storedUser;
+  }
+
+  private async joinInvite(
+    context: { endpoint: { id: string; name: string }; inviteId: string; sourceUrl: string },
+    currentUserId: string
+  ): Promise<void> {
+    const invite = await firstValueFrom(this.serverDirectory.getInvite(context.inviteId, {
+      sourceId: context.endpoint.id,
+      sourceUrl: context.sourceUrl
+    }));
+
+    this.invite.set(invite);
+    this.status.set('joining');
+    this.message.set(`Joining ${invite.server.name}…`);
+
+    const currentUser = await this.hydrateCurrentUser();
+    const joinResponse = await firstValueFrom(this.serverDirectory.requestJoin({
+      roomId: invite.server.id,
+      userId: currentUserId,
+      userPublicKey: currentUser?.oderId || currentUserId,
+      displayName: currentUser?.displayName || 'Anonymous',
+      inviteId: context.inviteId
+    }, {
+      sourceId: context.endpoint.id,
+      sourceUrl: context.sourceUrl
+    }));
+
+    this.store.dispatch(
+      RoomsActions.joinRoom({
+        roomId: joinResponse.server.id,
+        serverInfo: {
+          ...joinResponse.server,
+          sourceId: context.endpoint.id,
+          sourceName: context.endpoint.name,
+          sourceUrl: context.sourceUrl
+        }
+      })
+    );
+  }
+
+  private async redirectToLogin(): Promise<void> {
+    this.status.set('redirecting');
+    this.message.set('Redirecting to login…');
+
+    await this.router.navigate(['/login'], {
+      queryParams: {
+        returnUrl: this.router.url
+      }
+    });
+  }
+
+  private resolveInviteContext(): {
+    endpoint: { id: string; name: string };
+    inviteId: string;
+    sourceUrl: string;
+  } | null {
+    const inviteId = this.route.snapshot.paramMap.get('inviteId')?.trim() || '';
+    const sourceUrl = this.route.snapshot.queryParamMap.get('server')?.trim() || '';
+
+    if (!inviteId || !sourceUrl) {
+      this.status.set('error');
+      this.message.set('This invite link is missing required server information.');
+
+      return null;
+    }
+
+    const endpoint = this.serverDirectory.ensureServerEndpoint({
+      name: this.buildEndpointName(sourceUrl),
+      url: sourceUrl
+    }, {
+      setActive: !localStorage.getItem(STORAGE_KEY_CURRENT_USER_ID)
+    });
+
+    return {
+      endpoint: {
+        id: endpoint.id,
+        name: endpoint.name
+      },
+      inviteId,
+      sourceUrl
+    };
+  }
+}