fix: Added bullmq

src/auth/auth.module.ts

@@ -6,6 +6,8 @@ import { AuthGuard } from './guards/auth.guard';
 import { UserModule } from 'src/user/user.module';
 import { JwtModule } from '@nestjs/jwt';
 import { RequestContextModule } from 'core/als/request-context.module';
+import { BullModule } from '@nestjs/bullmq';
+import { Queue } from 'bullmq';
 
 @Global()
 @Module({
@@ -18,6 +20,9 @@ import { RequestContextModule } from 'core/als/request-context.module';
   ],
   controllers: [AuthController],
   imports: [
+    BullModule.registerQueue({
+      name: "mail"
+    }),
     UserModule,
     JwtModule,
     RequestContextModule,

src/auth/auth.service.ts

@@ -5,7 +5,8 @@ import * as bcrypt from 'bcrypt';
 import { UserService } from 'src/user/user.service';
 import { TokenInputType } from './types';
 import { JwtService } from '@nestjs/jwt';
-import { EventEmitter2 } from '@nestjs/event-emitter';
+import { Queue } from 'bullmq';
+import { InjectQueue } from '@nestjs/bullmq';
 
 @Injectable()
 @Public()
@@ -13,7 +14,7 @@ export class AuthService {
   constructor(
     private readonly userService: UserService,
     private readonly jwtService: JwtService,
-    private readonly eventEmitter: EventEmitter2
+    @InjectQueue('mail') private readonly mailQueue: Queue
   ) { }
 
   async register(dto: RegisterUserRequestDTO) {
@@ -23,7 +24,17 @@ export class AuthService {
       password: hashedPassword,
     });
 
-    this.eventEmitter.emit('user.sign_up', dto.email)
+    this.mailQueue.add('send-welcome-email', {
+      email: dto.email
+    }, {
+      attempts: 3,
+      backoff: {
+        type: "exponential",
+        delay: 3000,
+      },
+      removeOnComplete: true,  // clean up Redis after success
+      removeOnFail: false,
+    })
 
     return true;
   }