Survey App

Sneak Peeks

Dependency injection with Koin

val dbModule = module {
    single { Room.databaseBuilder(androidContext().applicationContext, AppDatabase::class.java, DB_NAME).build() }
    single { get<AppDatabase>().surveyDao() }
}

Repository pattern

interface SurveyRepository {
    suspend fun fetchNewSurvey(): Survey
    suspend fun storeSurvey(survey: Survey)
    suspend fun getPreviousSurveys(): List<PreviousSurvey>
}

Implementing usecases

class FetchSurveyUCImpl(private val surveyRepository: SurveyRepository) : FetchSurveyUC {
    override suspend fun fetch() = surveyRepository.fetchNewSurvey()
}

Viewmodels with coroutine

class PreviousSurveyVM(
    private val getPreviousSurveyUC: GetPreviousSurveyUC,
    override val coroutineContext: CoroutineContext
) : ViewModel(), CoroutineScope {

    private val _previousSurveyData = MutableLiveData<ModelResponse<List<PreviousSurvey>>> ()
    val prevSurveyData: LiveData<ModelResponse<List<PreviousSurvey>>> = _previousSurveyData

    fun get() {
        launch {
            _previousSurveyData.postValue(Loading())
            try {
                _previousSurveyData.postValue(SuccessResponse(body = getPreviousSurveyUC.get()))
            } catch (e: Exception) {
                _previousSurveyData.postValue(ErrorResponse(errorMessage = e.message))
                e.printStackTrace()
            }
        }
    }
}