feat: Add an admin endpoint to retrieve the total count of unread support messages.

src/messages/messages.gateway.ts

@@ -82,7 +82,13 @@ export class MessagesGateway implements OnGatewayConnection, OnGatewayDisconnect
     }
     this.userSocketMap.get(userId)!.add(client.id);
 
-    this.logger.log(`Client connected successfully: ${client.id} (User: ${userId})`);
+    this.logger.log(`Client connected successfully: ${client.id} (User: ${userId}, Role: ${payload.role})`);
+
+    // Auto-join admin users to admin_room for support chat notifications
+    if (payload.role === 'ADMIN') {
+      client.join('admin_room');
+      this.logger.log(`Admin ${userId} joined admin_room`);
+    }
 
     // Update user online status in background (don't await)
     this.messagesService.updateOnlineStatus(userId, true)
@@ -337,6 +343,12 @@ export class MessagesGateway implements OnGatewayConnection, OnGatewayDisconnect
       // Broadcast to all clients in the support chat room
       this.server.to(`support:${data.chatId}`).emit('support_new_message', message);
 
+      // Notify admins about new unread count (for sidebar badge)
+      if (senderRole !== 'ADMIN') {
+        const unreadTotal = await this.supportChatService.getAdminUnreadTotal();
+        this.server.to('admin_room').emit('support_unread_update', { unreadTotal });
+      }
+
       return { success: true, message };
     } catch (error) {
       return { error: error.message };

src/support-chat/support-chat.controller.ts

@@ -9,6 +9,8 @@ import {
   UseGuards,
   HttpCode,
   HttpStatus,
+  Inject,
+  forwardRef,
 } from '@nestjs/common';
 import {
   ApiTags,
@@ -24,13 +26,18 @@ import { JwtAuthGuard } from '../auth/guards';
 import { CurrentUser } from '../auth/decorators';
 import { Roles } from '../auth/decorators/roles.decorator';
 import { UserRole, SupportChatStatus } from '@prisma/client';
+import { MessagesGateway } from '../messages/messages.gateway';
 
 @ApiTags('Support Chat')
 @Controller('support-chat')
 @UseGuards(JwtAuthGuard)
 @ApiBearerAuth('JWT-auth')
 export class SupportChatController {
-  constructor(private readonly supportChatService: SupportChatService) {}
+  constructor(
+    private readonly supportChatService: SupportChatService,
+    @Inject(forwardRef(() => MessagesGateway))
+    private readonly messagesGateway: MessagesGateway,
+  ) {}
 
   // ==========================================
   // GET OR CREATE SUPPORT CHAT (User/Agent)
@@ -95,7 +102,24 @@ export class SupportChatController {
     await this.supportChatService.getChat(chatId, userId, isAdmin);
 
     const senderRole = role === UserRole.ADMIN ? 'ADMIN' : 'USER';
-    return this.supportChatService.sendMessage(chatId, userId, senderRole, dto.content);
+    const message = await this.supportChatService.sendMessage(chatId, userId, senderRole, dto.content);
+
+    // Emit WebSocket events for real-time updates
+    this.messagesGateway.server.to(`support:${chatId}`).emit('support_new_message', message);
+
+    // If user/agent sent the message, notify admins about unread count
+    if (senderRole !== 'ADMIN') {
+      const unreadTotal = await this.supportChatService.getAdminUnreadTotal();
+      this.messagesGateway.server.to('admin_room').emit('support_unread_update', { unreadTotal });
+    }
+
+    // If admin sent the message, notify the user directly
+    if (senderRole === 'ADMIN') {
+      const chat = await this.supportChatService.getChat(chatId, userId, true);
+      this.messagesGateway.sendToUser(chat.userId, 'support_new_message', message);
+    }
+
+    return message;
   }
 
   // ==========================================
@@ -109,7 +133,26 @@ export class SupportChatController {
     @Param('id') chatId: string,
     @CurrentUser('role') role: UserRole,
   ) {
-    return this.supportChatService.markAsRead(chatId, role);
+    const result = await this.supportChatService.markAsRead(chatId, role);
+
+    // If admin marked as read, update sidebar badge for all admins
+    if (role === UserRole.ADMIN) {
+      const unreadTotal = await this.supportChatService.getAdminUnreadTotal();
+      this.messagesGateway.server.to('admin_room').emit('support_unread_update', { unreadTotal });
+    }
+
+    return result;
+  }
+
+  // ==========================================
+  // ADMIN: GET TOTAL UNREAD COUNT
+  // ==========================================
+  @Get('admin/unread-total')
+  @Roles(UserRole.ADMIN)
+  @ApiOperation({ summary: 'Admin: Get total unread support message count' })
+  @ApiResponse({ status: 200, description: 'Total unread count returned' })
+  async getUnreadTotal() {
+    return this.supportChatService.getAdminUnreadTotal();
   }
 
   // ==========================================

src/support-chat/support-chat.module.ts

@@ -1,10 +1,11 @@
-import { Module } from '@nestjs/common';
+import { Module, forwardRef } from '@nestjs/common';
 import { SupportChatController } from './support-chat.controller';
 import { SupportChatService } from './support-chat.service';
 import { PrismaModule } from '../prisma/prisma.module';
+import { MessagesModule } from '../messages/messages.module';
 
 @Module({
-  imports: [PrismaModule],
+  imports: [PrismaModule, forwardRef(() => MessagesModule)],
   controllers: [SupportChatController],
   providers: [SupportChatService],
   exports: [SupportChatService],

src/support-chat/support-chat.service.ts

@@ -162,6 +162,17 @@ export class SupportChatService {
     return { success: true };
   }
 
+  /**
+   * Admin: get total unread message count across all open chats
+   */
+  async getAdminUnreadTotal(): Promise<number> {
+    const result = await this.prisma.supportChat.aggregate({
+      where: { status: SupportChatStatus.OPEN },
+      _sum: { adminUnreadCount: true },
+    });
+    return result._sum.adminUnreadCount || 0;
+  }
+
   /**
    * Admin: get all support chats
    */