WeatherUseCase.kt

class WeatherUseCase(
    private val locationManager: LocationManager,
    private val repository: TemperatureRepository) {

  suspend fun getCityData(): String = coroutineScope {
    try {
      val location = locationManager.getLastLocation()

      val cities = async { locationManager.getCities(location) }

      val temperature = repository.getTemperature(
             location.lat, location.lon)

      val city = cities.await().getOrElse(0) { "No city found" }
      "$city \n $temperature"
    } catch (e: Exception) {
      "Error retrieving data: ${e.message}"
    }
  }
}