feat(guild-realtime): broadcast message lifecycle events over websocket

Fabric.Backend.Guild/src/messaging/messaging.controller.ts

@@ -18,6 +18,7 @@ import { Message } from '../entities/message.entity';
 import { IdempotencyRecord } from '../entities/idempotency-record.entity';
 import { EventsService } from '../events/events.service';
 import { clampLimit, computeNextExpectedSeq } from './pagination.util';
+import { RealtimeGateway } from '../realtime/realtime.gateway';
 
 const EDIT_WINDOW_MS = 15 * 60 * 1000;
 const DEFAULT_PAGE_LIMIT = 50;
@@ -34,6 +35,7 @@ export class MessagingController {
     @InjectRepository(IdempotencyRecord)
     private readonly idemRepo: Repository<IdempotencyRecord>,
     private readonly events: EventsService,
+    private readonly realtime: RealtimeGateway,
   ) {}
 
   private async getIdempotentResponse(
@@ -125,6 +127,7 @@ export class MessagingController {
       actorId: body.authorUserId ?? 'anonymous',
       data: responseBody,
     });
+    this.realtime.emitChannelEvent(channelId, 'message.created', responseBody);
 
     return responseBody;
   }
@@ -161,6 +164,7 @@ export class MessagingController {
       actorId: saved.authorUserId,
       data: responseBody,
     });
+    this.realtime.emitChannelEvent(channelId, 'message.updated', responseBody);
 
     return responseBody;
   }
@@ -202,6 +206,11 @@ export class MessagingController {
         deletedAt: item.deletedAt?.toISOString() ?? null,
       },
     });
+    this.realtime.emitChannelEvent(channelId, 'message.deleted', {
+      messageId,
+      seq: item.seq,
+      deletedAt: item.deletedAt?.toISOString() ?? null,
+    });
 
     return responseBody;
   }