feat: Add pm

toju-app/src/app/domains/direct-message/application/services/peer-delivery.service.ts

@@ -0,0 +1,105 @@
+/* eslint-disable @typescript-eslint/member-ordering */
+import { Injectable, inject } from '@angular/core';
+import { Store } from '@ngrx/store';
+import {
+  Subject,
+  filter,
+  type Observable
+} from 'rxjs';
+import { RealtimeSessionFacade } from '../../../../core/realtime';
+import { selectAllUsers } from '../../../../store/users/users.selectors';
+import type { ChatEvent, User } from '../../../../shared-kernel';
+
+@Injectable({ providedIn: 'root' })
+export class PeerDeliveryService {
+  private readonly webrtc = inject(RealtimeSessionFacade);
+  private readonly store = inject(Store);
+  private readonly users = this.store.selectSignal(selectAllUsers);
+  private readonly networkRestoredSubject = new Subject<void>();
+
+  readonly directMessageEvents$: Observable<ChatEvent> = this.webrtc.onMessageReceived.pipe(
+    filter((event) => event.type === 'direct-message' || event.type === 'direct-message-status' || event.type === 'direct-message-mutation')
+  );
+
+  readonly peerConnected$ = this.webrtc.onPeerConnected;
+  readonly networkRestored$ = this.networkRestoredSubject.asObservable();
+
+  constructor() {
+    this.installNetworkTestHooks();
+  }
+
+  sendViaWebRTC(recipientId: string, event: ChatEvent): boolean {
+    if (this.isOfflineOverrideEnabled()) {
+      return false;
+    }
+
+    const peerId = this.resolvePeerId(recipientId);
+
+    if (!peerId) {
+      return false;
+    }
+
+    this.webrtc.sendToPeer(peerId, event);
+    return true;
+  }
+
+  handleAck(recipientId: string, event: ChatEvent): boolean {
+    return this.sendViaWebRTC(recipientId, event);
+  }
+
+  requestUserAvatar(recipientId: string): boolean {
+    return this.sendViaWebRTC(recipientId, {
+      type: 'user-avatar-request',
+      oderId: recipientId
+    });
+  }
+
+  syncOnReconnect(onReconnect: () => void): void {
+    this.peerConnected$.subscribe(() => onReconnect());
+  }
+
+  private resolvePeerId(recipientId: string): string | null {
+    const connectedPeerIds = new Set(this.webrtc.getConnectedPeers());
+
+    if (connectedPeerIds.has(recipientId)) {
+      return recipientId;
+    }
+
+    const user = this.users().find((candidate: User) =>
+      candidate.id === recipientId || candidate.oderId === recipientId || candidate.peerId === recipientId
+    );
+    const candidates = [
+      user?.oderId,
+      user?.peerId,
+      user?.id
+    ].filter((candidate): candidate is string => !!candidate);
+
+    return candidates.find((candidate) => connectedPeerIds.has(candidate)) ?? null;
+  }
+
+  private isOfflineOverrideEnabled(): boolean {
+    return typeof window !== 'undefined'
+      && !!(window as Window & { metoyouDmNetworkOffline?: boolean }).metoyouDmNetworkOffline;
+  }
+
+  private installNetworkTestHooks(): void {
+    if (typeof window === 'undefined') {
+      return;
+    }
+
+    const testWindow = window as Window & {
+      simulateOffline?: () => void;
+      simulateOnline?: () => void;
+      metoyouDmNetworkOffline?: boolean;
+    };
+
+    testWindow.simulateOffline = () => {
+      testWindow.metoyouDmNetworkOffline = true;
+    };
+
+    testWindow.simulateOnline = () => {
+      testWindow.metoyouDmNetworkOffline = false;
+      this.networkRestoredSubject.next();
+    };
+  }
+}