fix: recurriing network issue

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

@@ -4,6 +4,7 @@ import { Store } from '@ngrx/store';
 import {
   Subject,
   filter,
+  merge,
   type Observable
 } from 'rxjs';
 import { RealtimeSessionFacade } from '../../../../core/realtime';
@@ -17,7 +18,10 @@ export class PeerDeliveryService {
   private readonly users = this.store.selectSignal(selectAllUsers);
   private readonly networkRestoredSubject = new Subject<void>();
 
-  readonly directMessageEvents$: Observable<ChatEvent> = this.webrtc.onMessageReceived.pipe(
+  readonly directMessageEvents$: Observable<ChatEvent> = merge(
+    this.webrtc.onMessageReceived,
+    this.webrtc.onSignalingMessage as Observable<ChatEvent>
+  ).pipe(
     filter((event) => event.type === 'direct-message' || event.type === 'direct-message-status' || event.type === 'direct-message-mutation')
   );
 
@@ -35,12 +39,14 @@ export class PeerDeliveryService {
 
     const peerId = this.resolvePeerId(recipientId);
 
-    if (!peerId) {
-      return false;
+    let sent = false;
+
+    if (peerId) {
+      this.webrtc.sendToPeer(peerId, event);
+      sent = true;
     }
 
-    this.webrtc.sendToPeer(peerId, event);
-    return true;
+    return this.sendViaSignaling(recipientId, event) || sent;
   }
 
   handleAck(recipientId: string, event: ChatEvent): boolean {
@@ -77,6 +83,48 @@ export class PeerDeliveryService {
     return candidates.find((candidate) => connectedPeerIds.has(candidate)) ?? null;
   }
 
+  private sendViaSignaling(recipientId: string, event: ChatEvent): boolean {
+    if (event.type !== 'direct-message' && event.type !== 'direct-message-status' && event.type !== 'direct-message-mutation') {
+      return false;
+    }
+
+    const targetPeerId = this.resolveSignalingPeerId(recipientId);
+
+    if (!targetPeerId) {
+      return false;
+    }
+
+    try {
+      this.webrtc.sendRawMessage({
+        ...event,
+        targetUserId: targetPeerId
+      });
+
+      return true;
+    } catch {
+      return false;
+    }
+  }
+
+  private resolveSignalingPeerId(recipientId: string): string | null {
+    return this.resolveCandidateIds(recipientId).find((candidate) => this.webrtc.hasSignalingRouteForPeer(candidate)) ?? null;
+  }
+
+  private resolveCandidateIds(recipientId: string): string[] {
+    const user = this.users().find((candidate: User) =>
+      candidate.id === recipientId || candidate.oderId === recipientId || candidate.peerId === recipientId
+    );
+
+    return [
+      recipientId,
+      user?.oderId,
+      user?.peerId,
+      user?.id
+    ].filter((candidate, index, candidates): candidate is string =>
+      !!candidate && candidates.indexOf(candidate) === index
+    );
+  }
+
   private isOfflineOverrideEnabled(): boolean {
     return typeof window !== 'undefined'
       && !!(window as Window & { metoyouDmNetworkOffline?: boolean }).metoyouDmNetworkOffline;