Show auth errors to the user

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

@@ -8,10 +8,11 @@ import android.widget.EditText
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
-import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import com.google.android.material.textfield.TextInputLayout
 import dagger.hilt.android.AndroidEntryPoint
+import gq.kirmanak.mealient.R
+import gq.kirmanak.mealient.data.auth.impl.AuthenticationError.*
 import gq.kirmanak.mealient.databinding.FragmentAuthenticationBinding
 import timber.log.Timber
 
@@ -59,30 +60,35 @@ class AuthenticationFragment : Fragment() {
         findNavController().navigate(AuthenticationFragmentDirections.actionAuthenticationFragmentToRecipesFragment())
     }
 
-    private fun onLoginClicked() {
+    private fun onLoginClicked(): Unit = with(binding) {
         Timber.v("onLoginClicked() called")
-        val email: String
-        val pass: String
-        val url: String
-        with(binding) {
-            email = checkIfInputIsEmpty(emailInput, emailInputLayout) {
-                "Email is empty"
-            } ?: return
-            pass = checkIfInputIsEmpty(passwordInput, passwordInputLayout) {
-                "Pass is empty"
-            } ?: return
-            url = checkIfInputIsEmpty(urlInput, urlInputLayout) {
-                "URL is empty"
-            } ?: return
-        }
-        binding.button.isClickable = false
-        viewLifecycleOwner.lifecycleScope.launchWhenResumed {
-            runCatching {
-                viewModel.authenticate(email, pass, url)
-            }.onFailure {
-                Timber.e(it, "Can't authenticate")
+
+        val email: String = checkIfInputIsEmpty(emailInput, emailInputLayout) {
+            getString(R.string.fragment_authentication_email_input_empty)
+        } ?: return
+
+        val pass: String = checkIfInputIsEmpty(passwordInput, passwordInputLayout) {
+            getString(R.string.fragment_authentication_password_input_empty)
+        } ?: return
+
+        val url: String = checkIfInputIsEmpty(urlInput, urlInputLayout) {
+            getString(R.string.fragment_authentication_url_input_empty)
+        } ?: return
+
+        button.isClickable = false
+        viewModel.authenticate(email, pass, url).observe(viewLifecycleOwner) {
+            Timber.d("onLoginClicked: result $it")
+            passwordInputLayout.error = when (it.exceptionOrNull()) {
+                is Unauthorized -> getString(R.string.fragment_authentication_credentials_incorrect)
+                else -> null
             }
-            binding.button.isClickable = true
+            urlInputLayout.error = when (it.exceptionOrNull()) {
+                is NoServerConnection -> getString(R.string.fragment_authentication_no_connection)
+                is NotMealie -> getString(R.string.fragment_authentication_unexpected_response)
+                is Unauthorized, null -> null
+                else -> getString(R.string.fragment_authentication_unknown_error)
+            }
+            button.isClickable = true
         }
     }
 

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

@@ -1,9 +1,6 @@
 package gq.kirmanak.mealient.ui.auth
 
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.asLiveData
-import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.*
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.data.auth.AuthRepo
 import gq.kirmanak.mealient.data.recipes.RecipeRepo
@@ -16,13 +13,22 @@ class AuthenticationViewModel @Inject constructor(
     private val authRepo: AuthRepo,
     private val recipeRepo: RecipeRepo
 ) : ViewModel() {
-    init {
-        Timber.v("constructor called")
-    }
 
-    suspend fun authenticate(username: String, password: String, baseUrl: String) {
+    fun authenticate(username: String, password: String, baseUrl: String): LiveData<Result<Unit>> {
         Timber.v("authenticate() called with: username = $username, password = $password, baseUrl = $baseUrl")
-        authRepo.authenticate(username, password, baseUrl)
+        val result = MutableLiveData<Result<Unit>>()
+        viewModelScope.launch {
+            runCatching {
+                authRepo.authenticate(username, password, baseUrl)
+            }.onFailure {
+                Timber.e(it, "authenticate: can't authenticate")
+                result.value = Result.failure(it)
+            }.onSuccess {
+                Timber.d("authenticate: authenticated")
+                result.value = Result.success(Unit)
+            }
+        }
+        return result
     }
 
     fun authenticationStatuses(): LiveData<Boolean> {

app/src/main/res/values-ru/strings.xml

@@ -14,4 +14,11 @@
 	<string name="fragment_disclaimer_button_okay">Хорошо</string>
 	<string name="fragment_disclaimer_header">ДИСКЛЕЙМЕР</string>
 	<string name="fragment_disclaimer_main_text">Этот проект разрабатывается независимо от основного проекта Meale. Он не связан с разработчиками Mealie. О любых проблемах следует писать в репозиторий Mealient, НЕ в репозиторий Mealie.</string>
+	<string name="fragment_authentication_email_input_empty">E-mail не может быть пустым</string>
+	<string name="fragment_authentication_password_input_empty">Пароль не может быть пустым</string>
+	<string name="fragment_authentication_url_input_empty">URL не может быть пустым</string>
+	<string name="fragment_authentication_credentials_incorrect">E-mail или пароль не подходит.</string>
+	<string name="fragment_authentication_no_connection">Ошибка подключения, проверьте адрес.</string>
+	<string name="fragment_authentication_unexpected_response">Неожиданный ответ. Это Mealie?</string>
+	<string name="fragment_authentication_unknown_error">Что-то пошло не так, попробуйте еще раз.</string>
 </resources>

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

@@ -16,4 +16,11 @@
 	<string name="fragment_disclaimer_header">DISCLAIMER</string>
 	<string name="fragment_disclaimer_button_okay">Okay</string>
 	<string name="view_holder_recipe_instructions_step">Step: %d</string>
+	<string name="fragment_authentication_email_input_empty">E-mail can\'t be empty</string>
+	<string name="fragment_authentication_password_input_empty">Password can\'t be empty</string>
+	<string name="fragment_authentication_url_input_empty">URL can\'t be empty</string>
+	<string name="fragment_authentication_credentials_incorrect">E-mail or password is incorrect.</string>
+	<string name="fragment_authentication_no_connection">Can\'t connect, check address.</string>
+	<string name="fragment_authentication_unexpected_response">Unexpected response. Is it Mealie?</string>
+	<string name="fragment_authentication_unknown_error">Something went wrong, please try again.</string>
 </resources>