# All files / modules/notifications/services devices.service.ts

77.77% Statements 42/54
39.13% Branches 9/23
83.33% Functions 10/12
76.92% Lines 40/52

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     import {
      Injectable,
      Logger,
      NotFoundException,
      ConflictException,
    } from '@nestjs/common';
    import { InjectRepository } from '@nestjs/typeorm';
    import { Repository } from 'typeorm';
    import { UserDevice } from '../entities';
    import { RegisterDeviceDto, UpdateDeviceDto } from '../dto';

    @Injectable()
    export class DevicesService {
      private readonly logger = new Logger(DevicesService.name);

      constructor(
        @InjectRepository(UserDevice)
        private readonly deviceRepository: Repository<UserDevice>,
      ) {}

      async findByUser(userId: string, tenantId: string): Promise<UserDevice[]> {
        return this.deviceRepository.find({
          where: { user_id: userId, tenant_id: tenantId },
          order: { last_used_at: 'DESC' },
        });
      }

      async findActiveByUser(userId: string, tenantId: string): Promise<UserDevice[]> {
        return this.deviceRepository.find({
          where: { user_id: userId, tenant_id: tenantId, is_active: true },
          order: { last_used_at: 'DESC' },
        });
      }

      async findById(
        deviceId: string,
        userId: string,
        tenantId: string,
      ): Promise<UserDevice> {
        const device = await this.deviceRepository.findOne({
          where: { id: deviceId, user_id: userId, tenant_id: tenantId },
        });

        if (!device) {
          throw new NotFoundException('Dispositivo no encontrado');
        }

        return device;
      }

      async register(
        userId: string,
        tenantId: string,
        dto: RegisterDeviceDto,
      ): Promise<UserDevice> {
        // Check if device already exists
        const existing = await this.deviceRepository.findOne({
          where: {
            user_id: userId,
            device_token: dto.deviceToken,
          },
        });

        if (existing) {
          // Update existing device
          existing.is_active = true;
          existing.last_used_at = new Date();
          existing.device_name = dto.deviceName || existing.device_name;
          existing.browser = dto.browser || existing.browser;
          existing.browser_version = dto.browserVersion || existing.browser_version;
          existing.os = dto.os || existing.os;
          existing.os_version = dto.osVersion || existing.os_version;

          this.logger.log(`Device ${existing.id} reactivated for user ${userId}`);
          return this.deviceRepository.save(existing);
        }

        // Create new device
        const device = this.deviceRepository.create({
          user_id: userId,
          tenant_id: tenantId,
          device_token: dto.deviceToken,
          device_type: dto.deviceType || 'web',
          device_name: dto.deviceName,
          browser: dto.browser,
          browser_version: dto.browserVersion,
          os: dto.os,
          os_version: dto.osVersion,
          is_active: true,
          last_used_at: new Date(),
        });

        const saved = await this.deviceRepository.save(device);
        this.logger.log(`Device ${saved.id} registered for user ${userId}`);

        return saved;
      }

      async update(
        deviceId: string,
        userId: string,
        tenantId: string,
        dto: UpdateDeviceDto,
      ): Promise<UserDevice> {
        const device = await this.findById(deviceId, userId, tenantId);

        Iif (dto.deviceName !== undefined) {
          device.device_name = dto.deviceName;
        }

        Iif (dto.isActive !== undefined) {
          device.is_active = dto.isActive;
        }

        return this.deviceRepository.save(device);
      }

      async unregister(
        deviceId: string,
        userId: string,
        tenantId: string,
      ): Promise<void> {
        const device = await this.findById(deviceId, userId, tenantId);

        // Soft delete - mark as inactive
        device.is_active = false;
        await this.deviceRepository.save(device);

        this.logger.log(`Device ${deviceId} unregistered for user ${userId}`);
      }

      async delete(
        deviceId: string,
        userId: string,
        tenantId: string,
      ): Promise<void> {
        const result = await this.deviceRepository.delete({
          id: deviceId,
          user_id: userId,
          tenant_id: tenantId,
        });

        if (result.affected === 0) {
          throw new NotFoundException('Dispositivo no encontrado');
        }

        this.logger.log(`Device ${deviceId} deleted for user ${userId}`);
      }

      async markAsUsed(deviceId: string): Promise<void> {
        await this.deviceRepository.update(deviceId, {
          last_used_at: new Date(),
        });
      }

      async markAsInactive(deviceId: string): Promise<void> {
        await this.deviceRepository.update(deviceId, {
          is_active: false,
        });

        this.logger.warn(`Device ${deviceId} marked as inactive (subscription expired)`);
      }

      async countActiveDevices(userId: string, tenantId: string): Promise<number> {
        return this.deviceRepository.count({
          where: { user_id: userId, tenant_id: tenantId, is_active: true },
        });
      }

      async cleanupInactiveDevices(daysInactive: number = 90): Promise<number> {
        const cutoffDate = new Date();
        cutoffDate.setDate(cutoffDate.getDate() - daysInactive);

        const result = await this.deviceRepository
          .createQueryBuilder()
          .delete()
          .where('is_active = :inactive', { inactive: false })
          .andWhere('last_used_at < :cutoff', { cutoff: cutoffDate })
          .execute();

        Iif (result.affected && result.affected > 0) {
          this.logger.log(`Cleaned up ${result.affected} inactive devices`);
        }

        return result.affected || 0;
      }
    }