feat(guild-events): add webhook event envelope and message lifecycle emits

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

@@ -16,6 +16,7 @@ import { CreateMessageDto } from './dto.create-message.dto';
 import { Channel } from '../entities/channel.entity';
 import { Message } from '../entities/message.entity';
 import { IdempotencyRecord } from '../entities/idempotency-record.entity';
+import { EventsService } from '../events/events.service';
 
 const EDIT_WINDOW_MS = 15 * 60 * 1000;
 const DEFAULT_PAGE_LIMIT = 50;
@@ -31,6 +32,7 @@ export class MessagingController {
     private readonly messageRepo: Repository<Message>,
     @InjectRepository(IdempotencyRecord)
     private readonly idemRepo: Repository<IdempotencyRecord>,
+    private readonly events: EventsService,
   ) {}
 
   private async getIdempotentResponse(
@@ -115,6 +117,14 @@ export class MessagingController {
 
     const responseBody = this.toView(message) as Record<string, unknown>;
     await this.saveIdempotentResponse(scope, idempotencyKey, responseBody);
+
+    await this.events.emit({
+      eventType: 'message.created',
+      channelId,
+      actorId: body.authorUserId ?? 'anonymous',
+      data: responseBody,
+    });
+
     return responseBody;
   }
 
@@ -143,6 +153,14 @@ export class MessagingController {
     const saved = await this.messageRepo.save(item);
     const responseBody = this.toView(saved) as Record<string, unknown>;
     await this.saveIdempotentResponse(scope, idempotencyKey, responseBody);
+
+    await this.events.emit({
+      eventType: 'message.updated',
+      channelId,
+      actorId: saved.authorUserId,
+      data: responseBody,
+    });
+
     return responseBody;
   }
 
@@ -172,6 +190,18 @@ export class MessagingController {
       messageId,
     } as Record<string, unknown>;
     await this.saveIdempotentResponse(scope, idempotencyKey, responseBody);
+
+    await this.events.emit({
+      eventType: 'message.deleted',
+      channelId,
+      actorId: item.authorUserId,
+      data: {
+        messageId,
+        seq: item.seq,
+        deletedAt: item.deletedAt?.toISOString() ?? null,
+      },
+    });
+
     return responseBody;
   }