Implement showing authentication progress

app/src/main/java/gq/kirmanak/mealient/ui/OperationUiState.kt

@@ -0,0 +1,38 @@
+package gq.kirmanak.mealient.ui
+
+import android.widget.Button
+import android.widget.ProgressBar
+import androidx.core.view.isVisible
+
+sealed class OperationUiState<T> {
+
+    val exceptionOrNull: Throwable?
+        get() = (this as? Failure)?.exception
+
+    val isSuccess: Boolean
+        get() = this is Success
+
+    val isProgress: Boolean
+        get() = this is Progress
+
+    fun updateButtonState(button: Button) {
+        button.isEnabled = !isProgress
+        button.isClickable = !isProgress
+    }
+
+    fun updateProgressState(progressBar: ProgressBar) {
+        progressBar.isVisible = isProgress
+    }
+
+    class Initial<T> : OperationUiState<T>()
+
+    class Progress<T> : OperationUiState<T>()
+
+    data class Failure<T>(val exception: Throwable) : OperationUiState<T>()
+
+    data class Success<T>(val value: T) : OperationUiState<T>()
+
+    companion object {
+        fun <T> fromResult(result: Result<T>) = result.fold({ Success(it) }, { Failure(it) })
+    }
+}

app/src/main/java/gq/kirmanak/mealient/ui/auth/AuthenticationFragment.kt

@@ -12,6 +12,7 @@ import gq.kirmanak.mealient.R
 import gq.kirmanak.mealient.data.network.NetworkError
 import gq.kirmanak.mealient.databinding.FragmentAuthenticationBinding
 import gq.kirmanak.mealient.extensions.checkIfInputIsEmpty
+import gq.kirmanak.mealient.ui.OperationUiState
 import gq.kirmanak.mealient.ui.activity.MainActivityViewModel
 import timber.log.Timber
 
@@ -26,7 +27,7 @@ class AuthenticationFragment : Fragment(R.layout.fragment_authentication) {
         Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
         binding.button.setOnClickListener { onLoginClicked() }
         activityViewModel.updateUiState { it.copy(loginButtonVisible = false, titleVisible = true) }
-        viewModel.authenticationResult.observe(viewLifecycleOwner, ::onAuthenticationResult)
+        viewModel.uiState.observe(viewLifecycleOwner, ::onUiStateChange)
     }
 
     private fun onLoginClicked(): Unit = with(binding) {
@@ -45,22 +46,22 @@ class AuthenticationFragment : Fragment(R.layout.fragment_authentication) {
             trim = false,
         ) ?: return
 
-        button.isClickable = false
         viewModel.authenticate(email, pass)
     }
 
-    private fun onAuthenticationResult(result: Result<Unit>) {
+    private fun onUiStateChange(uiState: OperationUiState<Unit>) = with(binding) {
-        Timber.v("onAuthenticationResult() called with: result = $result")
+        Timber.v("onUiStateChange() called with: authUiState = $uiState")
-        if (result.isSuccess) {
+        if (uiState.isSuccess) {
             findNavController().popBackStack()
             return
         }
 
-        binding.passwordInputLayout.error = when (result.exceptionOrNull()) {
+        passwordInputLayout.error = when (uiState.exceptionOrNull) {
             is NetworkError.Unauthorized -> getString(R.string.fragment_authentication_credentials_incorrect)
             else -> null
         }
 
-        binding.button.isClickable = true
+        uiState.updateButtonState(button)
+        uiState.updateProgressState(progress)
     }
 }

app/src/main/java/gq/kirmanak/mealient/ui/auth/AuthenticationViewModel.kt

@@ -7,6 +7,7 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.data.auth.AuthRepo
 import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
+import gq.kirmanak.mealient.ui.OperationUiState
 import kotlinx.coroutines.launch
 import timber.log.Timber
 import javax.inject.Inject
@@ -16,16 +17,15 @@ class AuthenticationViewModel @Inject constructor(
     private val authRepo: AuthRepo,
 ) : ViewModel() {
 
-    private val _authenticationResult = MutableLiveData<Result<Unit>>()
+    private val _uiState = MutableLiveData<OperationUiState<Unit>>(OperationUiState.Initial())
-    val authenticationResult: LiveData<Result<Unit>>
+    val uiState: LiveData<OperationUiState<Unit>> get() = _uiState
-        get() = _authenticationResult
 
     fun authenticate(email: String, password: String) {
         Timber.v("authenticate() called with: email = $email, password = $password")
+        _uiState.value = OperationUiState.Progress()
         viewModelScope.launch {
-            _authenticationResult.value = runCatchingExceptCancel {
+            val result = runCatchingExceptCancel { authRepo.authenticate(email, password) }
-                authRepo.authenticate(email, password)
+            _uiState.value = OperationUiState.fromResult(result)
-            }
         }
     }
 }

app/src/main/java/gq/kirmanak/mealient/ui/baseurl/BaseURLFragment.kt

@@ -12,6 +12,7 @@ import gq.kirmanak.mealient.R
 import gq.kirmanak.mealient.data.network.NetworkError
 import gq.kirmanak.mealient.databinding.FragmentBaseUrlBinding
 import gq.kirmanak.mealient.extensions.checkIfInputIsEmpty
+import gq.kirmanak.mealient.ui.OperationUiState
 import gq.kirmanak.mealient.ui.activity.MainActivityViewModel
 import timber.log.Timber
 
@@ -26,7 +27,7 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
         super.onViewCreated(view, savedInstanceState)
         Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
         binding.button.setOnClickListener(::onProceedClick)
-        viewModel.checkURLResult.observe(viewLifecycleOwner, ::onCheckURLResult)
+        viewModel.uiState.observe(viewLifecycleOwner, ::onUiStateChange)
         activityViewModel.updateUiState { it.copy(loginButtonVisible = false, titleVisible = true) }
     }
 
@@ -40,13 +41,13 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
         viewModel.saveBaseUrl(url)
     }
 
-    private fun onCheckURLResult(result: Result<Unit>) {
+    private fun onUiStateChange(uiState: OperationUiState<Unit>) = with(binding) {
-        Timber.v("onCheckURLResult() called with: result = $result")
+        Timber.v("onUiStateChange() called with: uiState = $uiState")
-        if (result.isSuccess) {
+        if (uiState.isSuccess) {
             findNavController().navigate(BaseURLFragmentDirections.actionBaseURLFragmentToRecipesFragment())
             return
         }
-        binding.urlInputLayout.error = when (val exception = result.exceptionOrNull()) {
+        urlInputLayout.error = when (val exception = uiState.exceptionOrNull) {
             is NetworkError.NoServerConnection -> getString(R.string.fragment_base_url_no_connection)
             is NetworkError.NotMealie -> getString(R.string.fragment_base_url_unexpected_response)
             is NetworkError.MalformedUrl -> {
@@ -56,5 +57,8 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
             null -> null
             else -> getString(R.string.fragment_base_url_unknown_error)
         }
+
+        uiState.updateButtonState(button)
+        uiState.updateProgressState(progress)
     }
 }

app/src/main/java/gq/kirmanak/mealient/ui/baseurl/BaseURLViewModel.kt

@@ -8,6 +8,7 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.data.baseurl.BaseURLStorage
 import gq.kirmanak.mealient.data.baseurl.VersionDataSource
 import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
+import gq.kirmanak.mealient.ui.OperationUiState
 import kotlinx.coroutines.launch
 import timber.log.Timber
 import javax.inject.Inject
@@ -18,11 +19,12 @@ class BaseURLViewModel @Inject constructor(
     private val versionDataSource: VersionDataSource,
 ) : ViewModel() {
 
-    private val _checkURLResult = MutableLiveData<Result<Unit>>()
+    private val _uiState = MutableLiveData<OperationUiState<Unit>>(OperationUiState.Initial())
-    val checkURLResult: LiveData<Result<Unit>> get() = _checkURLResult
+    val uiState: LiveData<OperationUiState<Unit>> get() = _uiState
 
     fun saveBaseUrl(baseURL: String) {
         Timber.v("saveBaseUrl() called with: baseURL = $baseURL")
+        _uiState.value = OperationUiState.Progress()
         val hasPrefix = ALLOWED_PREFIXES.any { baseURL.startsWith(it) }
         val url = baseURL.takeIf { hasPrefix } ?: WITH_PREFIX_FORMAT.format(baseURL)
         viewModelScope.launch { checkBaseURL(url) }
@@ -36,7 +38,7 @@ class BaseURLViewModel @Inject constructor(
             baseURLStorage.storeBaseURL(baseURL)
         }
         Timber.i("checkBaseURL: result is $result")
-        _checkURLResult.value = result
+        _uiState.value = OperationUiState.fromResult(result)
     }
 
     companion object {

app/src/main/res/layout/fragment_authentication.xml

@@ -6,6 +6,14 @@
 	android:layout_height="match_parent"
 	tools:context=".ui.auth.AuthenticationFragment">
 
+	<com.google.android.material.progressindicator.LinearProgressIndicator
+		android:id="@+id/progress"
+		style="@style/IndeterminateProgress"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:visibility="visible" />
+
 	<com.google.android.material.textfield.TextInputLayout
 		android:id="@+id/email_input_layout"
 		style="@style/SmallMarginTextInputLayoutStyle"

app/src/main/res/layout/fragment_base_url.xml

@@ -6,6 +6,14 @@
     android:layout_height="match_parent"
     tools:context=".ui.baseurl.BaseURLFragment">
 
+    <com.google.android.material.progressindicator.LinearProgressIndicator
+        android:id="@+id/progress"
+        style="@style/IndeterminateProgress"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:visibility="visible" />
+
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/url_input_layout"
         style="@style/SmallMarginTextInputLayoutStyle"

app/src/main/res/values/styles.xml

@@ -28,4 +28,11 @@
 		<item name="shapeAppearanceOverlay">@null</item>
 		<item name="android:background">@drawable/recipe_info_background</item>
 	</style>
+
+	<style name="IndeterminateProgress">
+		<item name="android:layout_width">0dp</item>
+		<item name="android:layout_height">wrap_content</item>
+		<item name="android:indeterminate">true</item>
+		<item name="android:visibility">gone</item>
+	</style>
 </resources>