feat: implement support chat functionality with new module, service, controller, DTOs, and schema updates.

src/messages/messages.gateway.ts

@@ -11,6 +11,7 @@ import { Server, Socket } from 'socket.io';
 import { JwtService } from '@nestjs/jwt';
 import { ConfigService } from '@nestjs/config';
 import { MessagesService } from './messages.service';
+import { SupportChatService } from '../support-chat/support-chat.service';
 import { CreateMessageDto } from './dto';
 import { Logger } from '@nestjs/common';
 
@@ -35,6 +36,7 @@ export class MessagesGateway implements OnGatewayConnection, OnGatewayDisconnect
 
   constructor(
     private readonly messagesService: MessagesService,
+    private readonly supportChatService: SupportChatService,
     private readonly jwtService: JwtService,
     private readonly configService: ConfigService,
   ) {}
@@ -266,6 +268,103 @@ export class MessagesGateway implements OnGatewayConnection, OnGatewayDisconnect
     }
   }
 
+  // ==========================================
+  // SUPPORT CHAT EVENTS
+  // ==========================================
+
+  /**
+   * Join a support chat room
+   */
+  @SubscribeMessage('support_join')
+  async handleSupportJoin(
+    @ConnectedSocket() client: AuthenticatedSocket,
+    @MessageBody() data: { chatId: string },
+  ) {
+    if (!client.userId) {
+      return { error: 'Unauthorized' };
+    }
+
+    try {
+      const isAdmin = client.userRole === 'ADMIN';
+      await this.supportChatService.getChat(data.chatId, client.userId, isAdmin);
+      client.join(`support:${data.chatId}`);
+      this.logger.log(`User ${client.userId} joined support chat ${data.chatId}`);
+      return { success: true };
+    } catch (error) {
+      return { error: error.message };
+    }
+  }
+
+  /**
+   * Leave a support chat room
+   */
+  @SubscribeMessage('support_leave')
+  handleSupportLeave(
+    @ConnectedSocket() client: AuthenticatedSocket,
+    @MessageBody() data: { chatId: string },
+  ) {
+    client.leave(`support:${data.chatId}`);
+    this.logger.log(`User ${client.userId} left support chat ${data.chatId}`);
+    return { success: true };
+  }
+
+  /**
+   * Send a message in a support chat via WebSocket
+   */
+  @SubscribeMessage('support_send_message')
+  async handleSupportSendMessage(
+    @ConnectedSocket() client: AuthenticatedSocket,
+    @MessageBody() data: { chatId: string; content: string },
+  ) {
+    if (!client.userId) {
+      return { error: 'Unauthorized' };
+    }
+
+    try {
+      const senderRole = client.userRole === 'ADMIN' ? 'ADMIN' : 'USER';
+      const message = await this.supportChatService.sendMessage(
+        data.chatId,
+        client.userId,
+        senderRole,
+        data.content,
+      );
+
+      // Broadcast to all clients in the support chat room
+      this.server.to(`support:${data.chatId}`).emit('support_new_message', message);
+
+      return { success: true, message };
+    } catch (error) {
+      return { error: error.message };
+    }
+  }
+
+  /**
+   * Support chat typing indicators
+   */
+  @SubscribeMessage('support_typing_start')
+  handleSupportTypingStart(
+    @ConnectedSocket() client: AuthenticatedSocket,
+    @MessageBody() data: { chatId: string },
+  ) {
+    if (!client.userId) return;
+    client.to(`support:${data.chatId}`).emit('support_typing_start', {
+      userId: client.userId,
+      chatId: data.chatId,
+    });
+  }
+
+  @SubscribeMessage('support_typing_stop')
+  handleSupportTypingStop(
+    @ConnectedSocket() client: AuthenticatedSocket,
+    @MessageBody() data: { chatId: string },
+  ) {
+    if (!client.userId) return;
+    client.to(`support:${data.chatId}`).emit('support_typing_stop', {
+      userId: client.userId,
+      chatId: data.chatId,
+    });
+  }
+
   /**
    * Broadcast user online/offline status
    */

src/messages/messages.module.ts

@@ -5,10 +5,12 @@ import { MessagesController } from './messages.controller';
 import { MessagesService } from './messages.service';
 import { MessagesGateway } from './messages.gateway';
 import { PrismaModule } from '../prisma/prisma.module';
+import { SupportChatModule } from '../support-chat/support-chat.module';
 
 @Module({
   imports: [
     PrismaModule,
+    SupportChatModule,
     ConfigModule,
     JwtModule.registerAsync({
       imports: [ConfigModule],