Service nesting and dependencies

app.ts

  /**
   * Load internal services
   */
  loadServices(): void {
    this.sourceTypeService = new SourceTypeService(this.sourceTypeRepo);
    this.deviceTypeService = new DeviceTypeService(this.deviceTypeRepo);
    this.locationService = new LocationService(this.locationRepo);
    //
    this.sourceService = new SourceService(
      this.sourceRepo,
      this.sourceTypeService,
    );
    //
    this.deviceService = new DeviceService(
      this.deviceRepo,
      this.deviceTypeService,
      this.sourceService,
      this.locationService
    );
  }