Refactor group controller methods and add device product guard

src/guards/device.product.guard.ts

@@ -0,0 +1,71 @@
+import { DeviceRepository } from '@app/common/modules/device/repositories';
+import {
+  Injectable,
+  CanActivate,
+  HttpStatus,
+  BadRequestException,
+  ExecutionContext,
+} from '@nestjs/common';
+
+@Injectable()
+export class CheckProductUuidForAllDevicesGuard implements CanActivate {
+  constructor(private readonly deviceRepository: DeviceRepository) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const req = context.switchToHttp().getRequest();
+
+    try {
+      const { deviceUuids } = req.body;
+      console.log(deviceUuids);
+
+      await this.checkAllDevicesHaveSameProductUuid(deviceUuids);
+
+      return true;
+    } catch (error) {
+      this.handleGuardError(error, context);
+      return false;
+    }
+  }
+
+  async checkAllDevicesHaveSameProductUuid(deviceUuids: string[]) {
+    const firstDevice = await this.deviceRepository.findOne({
+      where: { uuid: deviceUuids[0] },
+    });
+
+    if (!firstDevice) {
+      throw new BadRequestException('First device not found');
+    }
+
+    const firstProductUuid = firstDevice.productUuid;
+
+    for (let i = 1; i < deviceUuids.length; i++) {
+      const device = await this.deviceRepository.findOne({
+        where: { uuid: deviceUuids[i] },
+      });
+
+      if (!device) {
+        throw new BadRequestException(`Device ${deviceUuids[i]} not found`);
+      }
+
+      if (device.productUuid !== firstProductUuid) {
+        throw new BadRequestException(`Devices have different product UUIDs`);
+      }
+    }
+  }
+
+  private handleGuardError(error: Error, context: ExecutionContext) {
+    const response = context.switchToHttp().getResponse();
+    console.error(error);
+
+    if (error instanceof BadRequestException) {
+      response
+        .status(HttpStatus.BAD_REQUEST)
+        .json({ statusCode: HttpStatus.BAD_REQUEST, message: error.message });
+    } else {
+      response.status(HttpStatus.NOT_FOUND).json({
+        statusCode: HttpStatus.NOT_FOUND,
+        message: 'Device not found',
+      });
+    }
+  }
+}