feat(backend): create admin dashboard backend

BackEnd/src/modules/admin/admin.module.ts

@@ -0,0 +1,88 @@
+import {
+  Controller,
+  Get,
+  Param,
+  Query,
+  UseGuards,
+  Injectable,
+  ForbiddenException,
+} from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
+import { RolesGuard } from '../auth/guards/roles.guard';
+import { User } from '../users/entities/user.entity';
+import { Role } from '../../common/enums/role.enum';
+
+// ── Service ──────────────────────────────────────────────────────────────────
+
+@Injectable()
+export class AdminService {
+  constructor(
+    @InjectRepository(User)
+    private readonly userRepo: Repository<User>,
+  ) {}
+
+  async getUsers(page: number, limit: number) {
+    const [users, total] = await this.userRepo.findAndCount({
+      skip: (page - 1) * limit,
+      take: limit,
+      order: { createdAt: 'DESC' },
+    });
+    return { users, total, page, limit };
+  }
+
+  async getUserById(id: string) {
+    const user = await this.userRepo.findOne({ where: { id } });
+    if (!user) {
+      throw new ForbiddenException('User not found');
+    }
+    return user;
+  }
+
+  async getPlatformStats() {
+    const totalUsers = await this.userRepo.count();
+    const adminCount = await this.userRepo.count({
+      where: { role: Role.ADMIN },
+    });
+    return { totalUsers, adminCount };
+  }
+}
+
+// ── Controller ────────────────────────────────────────────────────────────────
+
+@UseGuards(JwtAuthGuard, RolesGuard)
+@Controller('admin')
+export class AdminController {
+  constructor(private readonly adminService: AdminService) {}
+
+  @Get('users')
+  getUsers(
+    @Query('page') page = 1,
+    @Query('limit') limit = 20,
+  ) {
+    return this.adminService.getUsers(Number(page), Number(limit));
+  }
+
+  @Get('users/:id')
+  getUserById(@Param('id') id: string) {
+    return this.adminService.getUserById(id);
+  }
+
+  @Get('stats')
+  getPlatformStats() {
+    return this.adminService.getPlatformStats();
+  }
+}
+
+// ── Module ────────────────────────────────────────────────────────────────────
+
+@Module({
+  imports: [TypeOrmModule.forFeature([User])],
+  controllers: [AdminController],
+  providers: [AdminService],
+  exports: [AdminService],
+})
+export class AdminModule {}