Created
June 8, 2020 04:04
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| package com.cornershopapp.shopper.android.ui | |
| import androidx.lifecycle.ViewModel | |
| import androidx.lifecycle.viewModelScope | |
| import kotlinx.coroutines.* | |
| class Demo : ViewModel() { | |
| fun login(name: String, pass: String | |
| ) = viewModelScope.launch { | |
| val result = requestLogin(name, pass) | |
| show(result) | |
| } | |
| private suspend fun requestLogin( | |
| name: String, pass: String | |
| ): Either<Throwable, Boolean> = withContext(Dispatchers.IO) { | |
| if (name.isNotBlank() && pass.isNotBlank()) { | |
| return@withContext Either.Right(true) | |
| } else { | |
| return@withContext Either.Left(IllegalStateException("Invalid")) | |
| } | |
| } | |
| fun show(result: Either<Throwable, Boolean>) { | |
| // ... | |
| } | |
| } | |
| sealed class Either<out A, out B> { | |
| class Left<A>(val value: A) : Either<A, Nothing>() | |
| class Right<B>(val value: B) : Either<Nothing, B>() | |
| } |
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