class LoginActivity : Activity(), StoreSubscriber<AuthenticationState> {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_login)

        mEmailSignInButton.setOnClickListener {
            mainStore.dispatch(LoginAction(userName = mETEmail.text.toString(),
                    password = mETPassword.text.toString()))
        }
        mainStore.subscribe(this){
            it.select {
                it.authenticationState
            }.skipRepeats { oldState,newState ->
                oldState == newState
            }
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        mainStore.unsubscribe(this)
    }

    override fun newState(state: AuthenticationState) {
        if (state.isFetching) {
            ViewHelper.showProgress(show = true,
                        view = mViewForm,
                        progressView = mViewProgress,
                        resources = resources)
            } else {
                ViewHelper.showProgress(show = false,
                        view = mViewForm,
                        progressView = mViewProgress,
                        resources = resources)
            }
        }
}