Login state factory implementation

LoginStateFactoryImpl.kt

@LoginScope
class LoginStateFactoryImpl @Inject constructor(
    host: WelcomeFeatureHost, // External interface
    renderer: LoginRenderer, // Renderer
    private val createCredentialsCheck: CredentialsCheckState.Factory // Concrete state factory
) : LoginStateFactory {

    // Dependencies common for each state provided through the context
    private val context: LoginContext = object : LoginContext {
        override val factory: LoginStateFactory = this@Impl
        override val host: WelcomeFeatureHost = host
        override val renderer: LoginRenderer = renderer
    }

    override fun passwordEntry(data: LoginDataState): LoginState {
        // Create explicitly
        return PasswordEntryState(context, data) 
    }

    override fun checking(data: LoginDataState): LoginState {
        // Use provided state-factory
        return createCredentialsCheck(context, data)
    }

    override fun error(data: LoginDataState, error: Throwable): LoginState {
        // Create explicitly
        return ErrorState(context, data, error)
    }
}