251121:1700 Backend T3 wait testt

backend/src/modules/user/user-assignment.service.ts

@@ -0,0 +1,38 @@
+import { Injectable, BadRequestException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { UserAssignment } from './entities/user-assignment.entity.js'; // ต้องไปสร้าง Entity นี้ก่อน (ดูข้อ 3)
+import { AssignRoleDto } from './dto/assign-role.dto.js';
+import { User } from './entities/user.entity.js';
+
+@Injectable()
+export class UserAssignmentService {
+  constructor(
+    @InjectRepository(UserAssignment)
+    private assignmentRepo: Repository<UserAssignment>,
+  ) {}
+
+  async assignRole(dto: AssignRoleDto, assigner: User) {
+    // Validation: ตรวจสอบกฎเหล็ก (เลือกได้แค่ Scope เดียว)
+    const scopes = [dto.organizationId, dto.projectId, dto.contractId].filter(
+      (v) => v != null,
+    );
+    if (scopes.length > 1) {
+      throw new BadRequestException(
+        'Cannot assign multiple scopes at once. Choose one of Org, Project, or Contract.',
+      );
+    }
+
+    // สร้าง Assignment
+    const assignment = this.assignmentRepo.create({
+      userId: dto.userId,
+      roleId: dto.roleId,
+      organizationId: dto.organizationId,
+      projectId: dto.projectId,
+      contractId: dto.contractId,
+      assignedByUserId: assigner.user_id, // เก็บ Log ว่าใครเป็นคนให้สิทธิ์
+    });
+
+    return this.assignmentRepo.save(assignment);
+  }
+}