WeatherViewModel.kt

package de.stroeer.androiddevapplicant

import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch

class WeatherViewModel : ViewModel() {

    // repos
    val repository1 = WeatherTempForecastRepository()
    val repository2 = WeatherPrecipitationForecastRepository()
    val repository3 = GeocodingRepository()

    // observable properties for forecast
    private val _combinedForecast = MutableLiveData<Pair<TemperatureForecast, PrecipitationForecast>>()
    val combinedForecast: LiveData<Pair<TemperatureForecast, PrecipitationForecast>>
        get() = _combinedForecast

    var loading = MutableLiveData<Boolean>(false)
    var error = MutableLiveData<Exception?>(null)

    // observable properties for location suggestions
    var locationSearchSuggestions = MutableLiveData<List<LocationSuggestion>>()

    fun fetchForecastForLocation(ls: LocationSuggestion) {
        GlobalScope.launch(Dispatchers.IO) {
            loading.postValue(true)
            try {
                val forecast1 = repository1.fetchTempForecast(ls).await()
                val forecast2 = repository2.fetchPrecipForecast(ls).await()
                _combinedForecast.postValue(Pair(forecast1, forecast2))
                loading.postValue(false)
            } catch (e: Exception) {
                error.postValue(e)
            }
        }
    }

    fun fetchLocationSuggestions(userInput: String) {
        GlobalScope.launch(Dispatchers.IO) {
            val suggestionResponse = repository3.getSuggestions(userInput).await()

            // only first 5 suggestions should be shown
            val suggestions = mutableListOf<LocationSuggestion>()
            for (i in 0..suggestionResponse.suggestions.size - 1) {
                if (i < 5) {
                   suggestions.add( suggestionResponse.suggestions[i] );
                }
            }
            locationSearchSuggestions.postValue(suggestions)
        }
    }
}

data class TemperatureForecast(
    val temperatureInCelsius: Double? = null
)

data class PrecipitationForecast(
    val precipitationProbabilityInPercent: Int? = null
)