Handle api call Android kotlin

ApiCall.kt

import kotlinx.coroutines.*
// this code snipped from Vengatesh M.’s Post https://www.linkedin.com/feed/update/urn:li:activity:7150818581406994432/
fun main() {
    val viewmodel = ViewModel()
    runBlocking {
        viewmodel.getDataFromApi()
    }
}


// Modelling api states
sealed class ApiResult<out T> {
    data class Success<out T>(val data: T) : ApiResult<T>()
    data class Failure(val exception: Exception) : ApiResult<Nothing>()

    fun onSuccess(block: (T) -> Unit): ApiResult<T> {
        if (this is Success) {
            block(this.data)
        }
        return this
    }

    fun onFailure(block: (Exception) -> Unit): ApiResult<T> {
        if (this is Failure) {
            block(this.exception)
        }
        return this
    }
}

// Repository
class Repository {
    suspend fun getDataFromApi(): ApiResult<String> {
        return try {
            delay(1000L)
            // Simulate a successful network call
            val responseData = "Data from api"
            ApiResult.Success(responseData)
        } catch (e: Exception) {
            // Simulate a failed network call
            ApiResult.Failure(e)
        }
    }
}

// ViewModel
class ViewModel {
    private val repository = Repository()
    suspend fun getDataFromApi() {
        repository.getDataFromApi()
            .onSuccess { data ->
                println(data)
            }
            .onFailure { e ->
                println(e.localizedMessage)
            }
    }
}