Replace AccountManager with EncryptedSharedPreferences

app/build.gradle

@@ -154,6 +154,9 @@ dependencies {
     // https://developer.android.com/topic/libraries/architecture/datastore
     implementation "androidx.datastore:datastore-preferences:1.0.0"
 
+    // https://developer.android.com/topic/security/data#include-library
+    implementation "androidx.security:security-crypto:1.0.0"
+
     // https://github.com/junit-team/junit4/releases
     testImplementation "junit:junit:4.13.2"
 

app/src/main/AndroidManifest.xml

@@ -15,27 +15,16 @@
 		android:roundIcon="@mipmap/ic_launcher"
 		android:supportsRtl="true"
 		tools:ignore="UnusedAttribute"
-        android:theme="@style/Theme.Mealient">
+		android:theme="@style/Theme.Mealient">
-        <activity
+		<activity
-            android:name=".MainActivity"
+			android:name=".MainActivity"
-            android:exported="true">
+			android:exported="true">
-            <intent-filter>
+			<intent-filter>
-                <action android:name="android.intent.action.MAIN" />
+				<action android:name="android.intent.action.MAIN" />
 
-                <category android:name="android.intent.category.LAUNCHER" />
+				<category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
+			</intent-filter>
-        </activity>
+		</activity>
-
+	</application>
-        <service
-            android:name=".service.auth.AuthenticationService"
-            android:exported="false">
-            <intent-filter>
-                <action android:name="android.accounts.AccountAuthenticator" />
-            </intent-filter>
-            <meta-data
-                android:name="android.accounts.AccountAuthenticator"
-                android:resource="@xml/account_authenticator" />
-        </service>
-    </application>
 
 </manifest>

app/src/main/java/gq/kirmanak/mealient/MainActivity.kt

@@ -5,6 +5,8 @@ import android.view.Menu
 import android.view.MenuItem
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.net.toUri
+import androidx.navigation.findNavController
 import com.google.android.material.shape.CornerFamily
 import com.google.android.material.shape.MaterialShapeDrawable
 import dagger.hilt.android.AndroidEntryPoint
@@ -71,9 +73,11 @@ class MainActivity : AppCompatActivity() {
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         Timber.v("onOptionsItemSelected() called with: item = $item")
         val result = when (item.itemId) {
-            R.id.logout, R.id.login -> {
+            R.id.login -> {
-                // When user clicks logout they don't want to be authorized
+                navigateToLogin()
-                authViewModel.authRequested = item.itemId == R.id.login
+                true
+            }
+            R.id.logout -> {
                 authViewModel.logout()
                 true
             }
@@ -81,4 +85,9 @@ class MainActivity : AppCompatActivity() {
         }
         return result
     }
+
+    private fun navigateToLogin() {
+        Timber.v("navigateToLogin() called")
+        findNavController(binding.navHost.id).navigate("mealient://authenticate".toUri())
+    }
 }

app/src/main/java/gq/kirmanak/mealient/data/auth/AuthRepo.kt

@@ -6,7 +6,7 @@ interface AuthRepo {
 
     val isAuthorizedFlow: Flow<Boolean>
 
-    suspend fun authenticate(username: String, password: String)
+    suspend fun authenticate(email: String, password: String)
 
     suspend fun getAuthHeader(): String?
 
@@ -14,5 +14,5 @@ interface AuthRepo {
 
     suspend fun logout()
 
-    fun invalidateAuthHeader(header: String)
+    suspend fun invalidateAuthHeader()
 }

app/src/main/java/gq/kirmanak/mealient/data/auth/AuthStorage.kt

@@ -0,0 +1,20 @@
+package gq.kirmanak.mealient.data.auth
+
+import kotlinx.coroutines.flow.Flow
+
+interface AuthStorage {
+
+    val authHeaderFlow: Flow<String?>
+
+    suspend fun setAuthHeader(authHeader: String?)
+
+    suspend fun getAuthHeader(): String?
+
+    suspend fun setEmail(email: String?)
+
+    suspend fun getEmail(): String?
+
+    suspend fun setPassword(password: String?)
+
+    suspend fun getPassword(): String?
+}

app/src/main/java/gq/kirmanak/mealient/data/auth/impl/AuthDataSourceImpl.kt

@@ -23,7 +23,7 @@ class AuthDataSourceImpl @Inject constructor(
 
     override suspend fun authenticate(username: String, password: String): String {
         Timber.v("authenticate() called with: username = $username, password = $password")
-        val authService = authServiceFactory.provideService(needAuth = false)
+        val authService = authServiceFactory.provideService()
         val response = sendRequest(authService, username, password)
         val accessToken = parseToken(response)
         Timber.v("authenticate() returned: $accessToken")

app/src/main/java/gq/kirmanak/mealient/data/auth/impl/AuthRepoImpl.kt

@@ -1,9 +1,9 @@
 package gq.kirmanak.mealient.data.auth.impl
 
-import android.accounts.Account
+import gq.kirmanak.mealient.data.auth.AuthDataSource
 import gq.kirmanak.mealient.data.auth.AuthRepo
+import gq.kirmanak.mealient.data.auth.AuthStorage
 import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
-import gq.kirmanak.mealient.service.auth.AccountManagerInteractor
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
 import timber.log.Timber
@@ -12,71 +12,41 @@ import javax.inject.Singleton
 
 @Singleton
 class AuthRepoImpl @Inject constructor(
-    private val accountManagerInteractor: AccountManagerInteractor,
+    private val authStorage: AuthStorage,
+    private val authDataSource: AuthDataSource,
 ) : AuthRepo {
 
     override val isAuthorizedFlow: Flow<Boolean>
-        get() = accountManagerInteractor.accountUpdatesFlow()
+        get() = authStorage.authHeaderFlow.map { it != null }
-            .map { it.firstOrNull() }
-            .map { account ->
-                runCatchingExceptCancel { getAuthToken(account) }
-                    .onFailure { Timber.e(it, "authHeaderObservable: can't get token") }
-                    .getOrNull()
-            }.map { it != null }
 
-    override suspend fun authenticate(username: String, password: String) {
+    override suspend fun authenticate(email: String, password: String) {
-        Timber.v("authenticate() called with: username = $username, password = $password")
+        Timber.v("authenticate() called with: email = $email, password = $password")
-        val account = accountManagerInteractor.addAccount(username, password)
+        authDataSource.authenticate(email, password)
-        runCatchingExceptCancel {
+            .let { AUTH_HEADER_FORMAT.format(it) }
-            getAuthToken(account) // Try to get token to check if password is correct
+            .let { authStorage.setAuthHeader(it) }
-        }.onFailure {
+        authStorage.setEmail(email)
-            Timber.e(it, "authenticate: can't authorize")
+        authStorage.setPassword(password)
-            removeAccount(account) // Remove account with incorrect password
-        }.onSuccess {
-            Timber.d("authenticate: successfully authorized")
-        }.getOrThrow() // Throw error to show it to user
     }
 
-    override suspend fun getAuthHeader(): String? = runCatchingExceptCancel {
+    override suspend fun getAuthHeader(): String? = authStorage.getAuthHeader()
-        Timber.v("getAuthHeader() called")
-        currentAccount()
-            ?.let { getAuthToken(it) }
-            ?.let { AUTH_HEADER_FORMAT.format(it) }
-    }.onFailure {
-        Timber.e(it, "getAuthHeader: can't request auth header")
-    }.getOrNull()
 
-    private suspend fun getAuthToken(account: Account?): String? {
+    override suspend fun requireAuthHeader(): String = checkNotNull(getAuthHeader()) {
-        return account?.let { accountManagerInteractor.getAuthToken(it) }
+        "Auth header is null when it was required"
     }
 
-    private fun currentAccount(): Account? {
-        val account = accountManagerInteractor.getAccounts().firstOrNull()
-        Timber.v("currentAccount() returned: $account")
-        return account
-    }
-
-    override suspend fun requireAuthHeader(): String =
-        checkNotNull(getAuthHeader()) { "Auth header is null when it was required" }
-
     override suspend fun logout() {
         Timber.v("logout() called")
-        currentAccount()?.let { removeAccount(it) }
+        authStorage.setEmail(null)
+        authStorage.setPassword(null)
+        authStorage.setAuthHeader(null)
     }
 
-    private suspend fun removeAccount(account: Account) {
+    override suspend fun invalidateAuthHeader() {
-        Timber.v("removeAccount() called with: account = $account")
+        Timber.v("invalidateAuthHeader() called")
-        accountManagerInteractor.removeAccount(account)
+        val email = authStorage.getEmail() ?: return
-    }
+        val password = authStorage.getPassword() ?: return
-
+        runCatchingExceptCancel { authenticate(email, password) }
-    override fun invalidateAuthHeader(header: String) {
+            .onFailure { logout() } // Clear all known values to avoid reusing them
-        Timber.v("invalidateAuthHeader() called with: header = $header")
-        val token = header.substringAfter("Bearer ")
-        if (token == header) {
-            Timber.w("invalidateAuthHeader: can't find token in $header")
-        } else {
-            accountManagerInteractor.invalidateAuthToken(token)
-        }
     }
 
     companion object {

app/src/main/java/gq/kirmanak/mealient/data/auth/impl/AuthStorageImpl.kt

@@ -0,0 +1,64 @@
+package gq.kirmanak.mealient.data.auth.impl
+
+import android.content.SharedPreferences
+import androidx.core.content.edit
+import gq.kirmanak.mealient.data.auth.AuthStorage
+import gq.kirmanak.mealient.di.AuthModule.Companion.ENCRYPTED
+import gq.kirmanak.mealient.extensions.prefsChangeFlow
+import kotlinx.coroutines.asCoroutineDispatcher
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.withContext
+import timber.log.Timber
+import java.util.concurrent.Executors
+import javax.inject.Inject
+import javax.inject.Named
+import javax.inject.Singleton
+
+@Singleton
+class AuthStorageImpl @Inject constructor(
+    @Named(ENCRYPTED) private val sharedPreferences: SharedPreferences,
+) : AuthStorage {
+
+    override val authHeaderFlow: Flow<String?>
+        get() = sharedPreferences
+            .prefsChangeFlow { getString(AUTH_HEADER_KEY, null) }
+            .distinctUntilChanged()
+    private val singleThreadDispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
+
+    override suspend fun setAuthHeader(authHeader: String?) {
+        putString(AUTH_HEADER_KEY, authHeader)
+    }
+
+    override suspend fun getAuthHeader(): String? = getString(AUTH_HEADER_KEY)
+
+    override suspend fun setEmail(email: String?) = putString(EMAIL_KEY, email)
+
+    override suspend fun getEmail(): String? = getString(EMAIL_KEY)
+
+    override suspend fun setPassword(password: String?) = putString(PASSWORD_KEY, password)
+
+    override suspend fun getPassword(): String? = getString(PASSWORD_KEY)
+
+    private suspend fun putString(
+        key: String,
+        value: String?
+    ) = withContext(singleThreadDispatcher) {
+        Timber.v("putString() called with: key = $key, value = $value")
+        sharedPreferences.edit {
+            value?.let { putString(key, value) } ?: remove(key)
+        }
+    }
+
+    private suspend fun getString(key: String) = withContext(singleThreadDispatcher) {
+        val result = sharedPreferences.getString(key, null)
+        Timber.v("getString() called with: key = $key, returned: $result")
+        result
+    }
+
+    companion object {
+        private const val AUTH_HEADER_KEY = "authHeader"
+        private const val EMAIL_KEY = "email"
+        private const val PASSWORD_KEY = "password"
+    }
+}

app/src/main/java/gq/kirmanak/mealient/data/network/AuthenticationInterceptor.kt

@@ -19,7 +19,7 @@ class AuthenticationInterceptor @Inject constructor(
         val currentHeader = authHeader ?: return chain.proceed(chain.request())
         val response = proceedWithAuthHeader(chain, currentHeader)
         if (listOf(401, 403).contains(response.code)) {
-            authRepo.invalidateAuthHeader(currentHeader)
+            runBlocking { authRepo.invalidateAuthHeader() }
         } else {
             return response
         }

app/src/main/java/gq/kirmanak/mealient/data/network/RetrofitBuilder.kt

@@ -1,34 +1,26 @@
 package gq.kirmanak.mealient.data.network
 
 import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
-import gq.kirmanak.mealient.di.AUTH_OK_HTTP
-import gq.kirmanak.mealient.di.NO_AUTH_OK_HTTP
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.json.Json
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
 import retrofit2.Retrofit
 import timber.log.Timber
-import javax.inject.Inject
-import javax.inject.Named
-import javax.inject.Singleton
 
-@Singleton
+class RetrofitBuilder(
-class RetrofitBuilder @Inject constructor(
+    private val okHttpClient: OkHttpClient,
-    @Named(AUTH_OK_HTTP) private val authOkHttpClient: OkHttpClient,
-    @Named(NO_AUTH_OK_HTTP) private val noAuthOkHttpClient: OkHttpClient,
     private val json: Json
 ) {
 
     @OptIn(ExperimentalSerializationApi::class)
-    fun buildRetrofit(baseUrl: String, needAuth: Boolean): Retrofit {
+    fun buildRetrofit(baseUrl: String): Retrofit {
         Timber.v("buildRetrofit() called with: baseUrl = $baseUrl")
         val contentType = "application/json".toMediaType()
         val converterFactory = json.asConverterFactory(contentType)
-        val client = if (needAuth) authOkHttpClient else noAuthOkHttpClient
         return Retrofit.Builder()
             .baseUrl(baseUrl)
-            .client(client)
+            .client(okHttpClient)
             .addConverterFactory(converterFactory)
             .build()
     }

app/src/main/java/gq/kirmanak/mealient/data/network/RetrofitServiceFactory.kt

@@ -13,28 +13,21 @@ class RetrofitServiceFactory<T>(
     private val baseURLStorage: BaseURLStorage,
 ) : ServiceFactory<T> {
 
-    private val cache: MutableMap<ServiceParams, T> = mutableMapOf()
+    private val cache: MutableMap<String, T> = mutableMapOf()
 
-    override suspend fun provideService(
+    override suspend fun provideService(baseUrl: String?): T = runCatchingExceptCancel {
-        baseUrl: String?,
-        needAuth: Boolean,
-    ): T = runCatchingExceptCancel {
         Timber.v("provideService() called with: baseUrl = $baseUrl, class = ${serviceClass.simpleName}")
         val url = baseUrl ?: baseURLStorage.requireBaseURL()
-        val params = ServiceParams(url, needAuth)
+        synchronized(cache) { cache[url] ?: createService(url, serviceClass) }
-        synchronized(cache) { cache[params] ?: createService(params, serviceClass) }
     }.getOrElse {
         Timber.e(it, "provideService: can't provide service for $baseUrl")
         throw NetworkError.MalformedUrl(it)
     }
 
-    private fun createService(serviceParams: ServiceParams, serviceClass: Class<T>): T {
+    private fun createService(url: String, serviceClass: Class<T>): T {
-        Timber.v("createService() called with: serviceParams = $serviceParams, serviceClass = ${serviceClass.simpleName}")
+        Timber.v("createService() called with: url = $url, serviceClass = ${serviceClass.simpleName}")
-        val (url, needAuth) = serviceParams
+        val service = retrofitBuilder.buildRetrofit(url).create(serviceClass)
-        val service = retrofitBuilder.buildRetrofit(url, needAuth).create(serviceClass)
+        cache[url] = service
-        cache[serviceParams] = service
         return service
     }
-
-    data class ServiceParams(val baseUrl: String, val needAuth: Boolean)
 }

app/src/main/java/gq/kirmanak/mealient/data/network/ServiceFactory.kt

@@ -2,5 +2,5 @@ package gq.kirmanak.mealient.data.network
 
 interface ServiceFactory<T> {
 
-    suspend fun provideService(baseUrl: String? = null, needAuth: Boolean = true): T
+    suspend fun provideService(baseUrl: String? = null): T
 }

app/src/main/java/gq/kirmanak/mealient/di/AuthModule.kt

@@ -2,25 +2,29 @@ package gq.kirmanak.mealient.di
 
 import android.accounts.AccountManager
 import android.content.Context
+import android.content.SharedPreferences
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import dagger.Binds
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
-import gq.kirmanak.mealient.R
 import gq.kirmanak.mealient.data.auth.AuthDataSource
 import gq.kirmanak.mealient.data.auth.AuthRepo
+import gq.kirmanak.mealient.data.auth.AuthStorage
 import gq.kirmanak.mealient.data.auth.impl.AuthDataSourceImpl
 import gq.kirmanak.mealient.data.auth.impl.AuthRepoImpl
 import gq.kirmanak.mealient.data.auth.impl.AuthService
+import gq.kirmanak.mealient.data.auth.impl.AuthStorageImpl
 import gq.kirmanak.mealient.data.baseurl.BaseURLStorage
 import gq.kirmanak.mealient.data.network.RetrofitBuilder
 import gq.kirmanak.mealient.data.network.ServiceFactory
 import gq.kirmanak.mealient.data.network.createServiceFactory
-import gq.kirmanak.mealient.service.auth.AccountManagerInteractor
+import kotlinx.serialization.json.Json
-import gq.kirmanak.mealient.service.auth.AccountManagerInteractorImpl
+import okhttp3.OkHttpClient
-import gq.kirmanak.mealient.service.auth.AccountParameters
+import javax.inject.Named
 import javax.inject.Singleton
 
 @Module
@@ -28,13 +32,17 @@ import javax.inject.Singleton
 interface AuthModule {
 
     companion object {
+        const val ENCRYPTED = "encrypted"
 
         @Provides
         @Singleton
         fun provideAuthServiceFactory(
-            retrofitBuilder: RetrofitBuilder,
+            @Named(NO_AUTH_OK_HTTP) okHttpClient: OkHttpClient,
+            json: Json,
             baseURLStorage: BaseURLStorage,
-        ): ServiceFactory<AuthService> = retrofitBuilder.createServiceFactory(baseURLStorage)
+        ): ServiceFactory<AuthService> {
+            return RetrofitBuilder(okHttpClient, json).createServiceFactory(baseURLStorage)
+        }
 
         @Provides
         @Singleton
@@ -44,10 +52,20 @@ interface AuthModule {
 
         @Provides
         @Singleton
-        fun provideAccountType(@ApplicationContext context: Context) = AccountParameters(
+        @Named(ENCRYPTED)
-            accountType = context.getString(R.string.account_type),
+        fun provideEncryptedSharedPreferences(
-            authTokenType = context.getString(R.string.auth_token_type),
+            @ApplicationContext applicationContext: Context,
-        )
+        ): SharedPreferences {
+            val keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC
+            val mainKeyAlias = MasterKeys.getOrCreate(keyGenParameterSpec)
+            return EncryptedSharedPreferences.create(
+                ENCRYPTED,
+                mainKeyAlias,
+                applicationContext,
+                EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+                EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+            )
+        }
     }
 
     @Binds
@@ -60,7 +78,5 @@ interface AuthModule {
 
     @Binds
     @Singleton
-    fun bindAccountManagerInteractor(
+    fun bindAuthStorage(authStorageImpl: AuthStorageImpl): AuthStorage
-        accountManagerInteractorImpl: AccountManagerInteractorImpl
-    ): AccountManagerInteractor
 }

app/src/main/java/gq/kirmanak/mealient/di/BaseURLModule.kt

@@ -9,6 +9,9 @@ import gq.kirmanak.mealient.data.baseurl.*
 import gq.kirmanak.mealient.data.network.RetrofitBuilder
 import gq.kirmanak.mealient.data.network.ServiceFactory
 import gq.kirmanak.mealient.data.network.createServiceFactory
+import kotlinx.serialization.json.Json
+import okhttp3.OkHttpClient
+import javax.inject.Named
 import javax.inject.Singleton
 
 @Module
@@ -20,9 +23,12 @@ interface BaseURLModule {
         @Provides
         @Singleton
         fun provideVersionServiceFactory(
-            retrofitBuilder: RetrofitBuilder,
+            @Named(AUTH_OK_HTTP) okHttpClient: OkHttpClient,
+            json: Json,
             baseURLStorage: BaseURLStorage,
-        ): ServiceFactory<VersionService> = retrofitBuilder.createServiceFactory(baseURLStorage)
+        ): ServiceFactory<VersionService> {
+            return RetrofitBuilder(okHttpClient, json).createServiceFactory(baseURLStorage)
+        }
     }
 
     @Binds

app/src/main/java/gq/kirmanak/mealient/di/RecipeModule.kt

@@ -19,6 +19,9 @@ import gq.kirmanak.mealient.data.recipes.impl.RecipeRepoImpl
 import gq.kirmanak.mealient.data.recipes.network.RecipeDataSource
 import gq.kirmanak.mealient.data.recipes.network.RecipeDataSourceImpl
 import gq.kirmanak.mealient.data.recipes.network.RecipeService
+import kotlinx.serialization.json.Json
+import okhttp3.OkHttpClient
+import javax.inject.Named
 import javax.inject.Singleton
 
 @Module
@@ -46,9 +49,12 @@ interface RecipeModule {
         @Provides
         @Singleton
         fun provideRecipeServiceFactory(
-            retrofitBuilder: RetrofitBuilder,
+            @Named(AUTH_OK_HTTP) okHttpClient: OkHttpClient,
+            json: Json,
             baseURLStorage: BaseURLStorage,
-        ): ServiceFactory<RecipeService> = retrofitBuilder.createServiceFactory(baseURLStorage)
+        ): ServiceFactory<RecipeService> {
+            return RetrofitBuilder(okHttpClient, json).createServiceFactory(baseURLStorage)
+        }
 
         @Provides
         @Singleton

app/src/main/java/gq/kirmanak/mealient/extensions/FragmentExtensions.kt

@@ -4,6 +4,7 @@ import androidx.activity.OnBackPressedDispatcher
 import androidx.activity.addCallback
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
@@ -33,4 +34,8 @@ fun OnBackPressedDispatcher.backPressedFlow(): Flow<Unit> = callbackFlow {
 inline fun <T> Fragment.collectWithViewLifecycle(
     flow: Flow<T>,
     crossinline collector: suspend (T) -> Unit,
-) = viewLifecycleOwner.lifecycleScope.launch { flow.collect(collector) }
+) = launchWithViewLifecycle { flow.collect(collector) }
+
+fun Fragment.launchWithViewLifecycle(
+    block: suspend CoroutineScope.() -> Unit,
+) = viewLifecycleOwner.lifecycleScope.launch(block = block)

app/src/main/java/gq/kirmanak/mealient/extensions/ViewExtensions.kt

@@ -1,6 +1,7 @@
 package gq.kirmanak.mealient.extensions
 
 import android.app.Activity
+import android.content.SharedPreferences
 import android.os.Build
 import android.view.View
 import android.view.WindowInsets
@@ -106,4 +107,17 @@ fun EditText.checkIfInputIsEmpty(
 suspend fun EditText.waitUntilNotEmpty() {
     textChangesFlow().filterNotNull().first { it.isNotEmpty() }
     Timber.v("waitUntilNotEmpty() returned")
+}
+
+@OptIn(ExperimentalCoroutinesApi::class)
+fun <T> SharedPreferences.prefsChangeFlow(
+    valueReader: SharedPreferences.() -> T,
+): Flow<T> = callbackFlow {
+    val listener = SharedPreferences.OnSharedPreferenceChangeListener { prefs, _ ->
+        val value = prefs.valueReader()
+        trySend(value).logErrors("prefsChangeFlow")
+    }
+    trySend(valueReader())
+    registerOnSharedPreferenceChangeListener(listener)
+    awaitClose { unregisterOnSharedPreferenceChangeListener(listener) }
 }

app/src/main/java/gq/kirmanak/mealient/service/auth/AccountAuthenticatorImpl.kt

@@ -1,137 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.accounts.*
-import android.content.Context
-import android.os.Bundle
-import dagger.hilt.android.qualifiers.ApplicationContext
-import gq.kirmanak.mealient.data.auth.AuthDataSource
-import gq.kirmanak.mealient.data.network.NetworkError
-import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
-import gq.kirmanak.mealient.service.auth.AuthenticatorException.*
-import kotlinx.coroutines.runBlocking
-import kotlinx.coroutines.withTimeout
-import timber.log.Timber
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class AccountAuthenticatorImpl @Inject constructor(
-    @ApplicationContext private val context: Context,
-    private val authDataSource: AuthDataSource,
-    private val accountParameters: AccountParameters,
-    private val accountManager: AccountManager,
-) : AbstractAccountAuthenticator(context) {
-
-    private val accountType: String
-        get() = accountParameters.accountType
-    private val authTokenType: String
-        get() = accountParameters.authTokenType
-
-    override fun getAuthToken(
-        response: AccountAuthenticatorResponse,
-        account: Account,
-        authTokenType: String,
-        options: Bundle?
-    ): Bundle {
-        Timber.v("getAuthToken() called with: response = $response, account = $account, authTokenType = $authTokenType, options = $options")
-
-        val password = try {
-            checkAccountType(account.type)
-            checkAuthTokenType(authTokenType)
-            accountManager.getPassword(account) ?: throw AccountNotFound(account)
-        } catch (e: AuthenticatorException) {
-            Timber.e(e, "getAuthToken: validation failure")
-            return e.bundle
-        }
-
-        val token = runCatchingExceptCancel {
-            runBlocking {
-                withTimeout(10000) {
-                    authDataSource.authenticate(account.name, password)
-                }
-            }
-        }.getOrElse {
-            return when (it) {
-                is NetworkError.NotMealie -> NotMealie.bundle
-                is NetworkError.Unauthorized -> Unauthorized.bundle
-                else -> throw NetworkErrorException(it)
-            }
-        }
-
-        return Bundle().apply {
-            putString(AccountManager.KEY_ACCOUNT_NAME, account.name)
-            putString(AccountManager.KEY_ACCOUNT_TYPE, accountType)
-            putString(AccountManager.KEY_AUTHTOKEN, token)
-        }
-    }
-
-    // region Unsupported operations
-    override fun confirmCredentials(
-        response: AccountAuthenticatorResponse?,
-        account: Account?,
-        options: Bundle?
-    ): Bundle {
-        Timber.v("confirmCredentials() called with: response = $response, account = $account, options = $options")
-        return UnsupportedOperation("confirmCredentials").bundle
-    }
-
-    override fun addAccount(
-        response: AccountAuthenticatorResponse,
-        accountType: String,
-        authTokenType: String,
-        requiredFeatures: Array<out String>?,
-        options: Bundle?,
-    ): Bundle {
-        Timber.v("addAccount() called with: response = $response, accountType = $accountType, authTokenType = $authTokenType, requiredFeatures = $requiredFeatures, options = $options")
-        return UnsupportedOperation("addAccount").bundle
-    }
-
-    override fun editProperties(
-        response: AccountAuthenticatorResponse,
-        accountType: String,
-    ): Bundle? {
-        Timber.v("editProperties() called with: response = $response, accountType = $accountType")
-        response.onError(
-            AccountManager.ERROR_CODE_UNSUPPORTED_OPERATION,
-            "editProperties is not supported"
-        )
-        return null
-    }
-
-    override fun getAuthTokenLabel(authTokenType: String?): String? {
-        Timber.v("getAuthTokenLabel() called with: authTokenType = $authTokenType")
-        return null
-    }
-
-    override fun updateCredentials(
-        response: AccountAuthenticatorResponse?,
-        account: Account?,
-        authTokenType: String?,
-        options: Bundle?
-    ): Bundle {
-        Timber.v("updateCredentials() called with: response = $response, account = $account, authTokenType = $authTokenType, options = $options")
-        return UnsupportedOperation("updateCredentials").bundle
-    }
-
-    override fun hasFeatures(
-        response: AccountAuthenticatorResponse?,
-        account: Account?,
-        features: Array<out String>?
-    ): Bundle {
-        Timber.v("hasFeatures() called with: response = $response, account = $account, features = $features")
-        return Bundle().apply { putBoolean(AccountManager.KEY_BOOLEAN_RESULT, true) }
-    }
-    // end region
-
-    private fun checkAccountType(accountType: String) {
-        if (accountType != this.accountType) {
-            throw UnsupportedAccountType(accountType)
-        }
-    }
-
-    private fun checkAuthTokenType(authTokenType: String) {
-        if (authTokenType != this.authTokenType) {
-            throw UnsupportedAuthTokenType(authTokenType)
-        }
-    }
-}

app/src/main/java/gq/kirmanak/mealient/service/auth/AccountManagerInteractor.kt

@@ -1,19 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.accounts.Account
-import kotlinx.coroutines.flow.Flow
-
-interface AccountManagerInteractor {
-
-    fun getAccounts(): Array<Account>
-
-    suspend fun addAccount(email: String, password: String): Account
-
-    suspend fun getAuthToken(account: Account): String
-
-    fun accountUpdatesFlow(): Flow<Array<Account>>
-
-    suspend fun removeAccount(account: Account)
-
-    fun invalidateAuthToken(token: String)
-}

app/src/main/java/gq/kirmanak/mealient/service/auth/AccountManagerInteractorImpl.kt

@@ -1,70 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import kotlinx.coroutines.flow.Flow
-import timber.log.Timber
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class AccountManagerInteractorImpl @Inject constructor(
-    private val accountManager: AccountManager,
-    private val accountParameters: AccountParameters,
-) : AccountManagerInteractor {
-
-    private val accountType: String
-        get() = accountParameters.accountType
-    private val authTokenType: String
-        get() = accountParameters.authTokenType
-
-    override fun getAccounts(): Array<Account> {
-        Timber.v("getAccounts() called")
-        val accounts = accountManager.getAccountsByType(accountType)
-        Timber.v("getAccounts() returned: ${accounts.contentToString()}")
-        return accounts
-    }
-
-    override suspend fun addAccount(email: String, password: String): Account {
-        Timber.v("addAccount() called with: email = $email, password = $password")
-        val account = Account(email, accountType)
-        removeAccount(account) // Remove account if it was created earlier
-        accountManager.addAccountExplicitly(account, password, null)
-        return account
-    }
-
-    override suspend fun getAuthToken(account: Account): String {
-        Timber.v("getAuthToken() called with: account = $account")
-        val bundle = accountManager.getAuthToken(
-            account,
-            authTokenType,
-            null,
-            null,
-            null,
-            null
-        ).await()
-        val receivedAccount = bundle.toAccount()
-        check(account == receivedAccount) {
-            "Received account ($receivedAccount) differs from requested ($account)"
-        }
-        val token = bundle.authToken()
-        Timber.v("getAuthToken() returned: $token")
-        return token
-    }
-
-    override fun accountUpdatesFlow(): Flow<Array<Account>> {
-        Timber.v("accountUpdatesFlow() called")
-        return accountManager.accountUpdatesFlow(accountType)
-    }
-
-    override suspend fun removeAccount(account: Account) {
-        Timber.v("removeAccount() called with: account = $account")
-        val bundle = accountManager.removeAccount(account, null, null, null).await()
-        Timber.d("removeAccount: result is ${bundle.result()}")
-    }
-
-    override fun invalidateAuthToken(token: String) {
-        Timber.v("resetAuthToken() called with: token = $token")
-        accountManager.invalidateAuthToken(accountType, token)
-    }
-}

app/src/main/java/gq/kirmanak/mealient/service/auth/AccountParameters.kt

@@ -1,6 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-data class AccountParameters(
-    val accountType: String,
-    val authTokenType: String,
-)

app/src/main/java/gq/kirmanak/mealient/service/auth/AuthExtensions.kt

@@ -1,53 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.accounts.AccountManager.*
-import android.accounts.AccountManagerFuture
-import android.accounts.OnAccountsUpdateListener
-import android.os.Build
-import android.os.Bundle
-import gq.kirmanak.mealient.extensions.logErrors
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.channels.awaitClose
-import kotlinx.coroutines.channels.trySendBlocking
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.callbackFlow
-import kotlinx.coroutines.withContext
-import timber.log.Timber
-
-internal suspend fun <T> AccountManagerFuture<T>.await(): T = withContext(Dispatchers.IO) { result }
-
-internal fun Bundle.toAccount(): Account = Account(accountName(), accountType())
-
-internal fun Bundle.accountType(): String = string(KEY_ACCOUNT_TYPE) { "Account type is null" }
-
-internal fun Bundle.accountName(): String = string(KEY_ACCOUNT_NAME) { "Account name is null" }
-
-internal fun Bundle.authToken(): String = string(KEY_AUTHTOKEN) { "Auth token is null" }
-
-internal fun Bundle.result(): Boolean = getBoolean(KEY_BOOLEAN_RESULT)
-
-private fun Bundle.string(key: String, error: () -> String) = checkNotNull(getString(key), error)
-
-@OptIn(ExperimentalCoroutinesApi::class)
-internal fun AccountManager.accountUpdatesFlow(vararg types: String): Flow<Array<Account>> =
-    callbackFlow {
-        Timber.v("accountUpdatesFlow() called")
-        val listener = OnAccountsUpdateListener { accounts ->
-            Timber.d("accountUpdatesFlow: updated accounts = ${accounts.contentToString()}")
-            val filtered = accounts.filter { types.contains(it.type) }.toTypedArray()
-            Timber.d("accountUpdatesFlow: filtered accounts = ${filtered.contentToString()}")
-            trySendBlocking(filtered).logErrors("accountUpdatesFlow")
-        }
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            addOnAccountsUpdatedListener(listener, null, true, types)
-        } else {
-            addOnAccountsUpdatedListener(listener, null, true)
-        }
-        awaitClose {
-            Timber.d("accountUpdatesFlow: cancelled")
-            removeOnAccountsUpdatedListener(listener)
-        }
-    }

app/src/main/java/gq/kirmanak/mealient/service/auth/AuthenticationService.kt

@@ -1,16 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.app.Service
-import android.content.Intent
-import android.os.IBinder
-import dagger.hilt.android.AndroidEntryPoint
-import javax.inject.Inject
-
-@AndroidEntryPoint
-class AuthenticationService : Service() {
-
-    @Inject
-    lateinit var accountAuthenticatorImpl: AccountAuthenticatorImpl
-
-    override fun onBind(intent: Intent?): IBinder? = accountAuthenticatorImpl.iBinder
-}

app/src/main/java/gq/kirmanak/mealient/service/auth/AuthenticatorException.kt

@@ -1,49 +0,0 @@
-package gq.kirmanak.mealient.service.auth
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.os.Bundle
-
-sealed class AuthenticatorException(
-    val bundle: Bundle
-) : RuntimeException() {
-
-    constructor(errorCode: Int, errorMessage: String) : this(
-        Bundle().apply {
-            putInt(AccountManager.KEY_ERROR_CODE, errorCode)
-            putString(AccountManager.KEY_ERROR_MESSAGE, errorMessage)
-        }
-    )
-
-    class UnsupportedAuthTokenType(received: String?) : AuthenticatorException(
-        errorCode = AccountManager.ERROR_CODE_BAD_ARGUMENTS,
-        errorMessage = "Received auth token type = $received"
-    )
-
-    class UnsupportedAccountType(received: String?) : AuthenticatorException(
-        errorCode = AccountManager.ERROR_CODE_BAD_ARGUMENTS,
-        errorMessage = "Received account type = $received"
-    )
-
-    class UnsupportedOperation(operation: String) : AuthenticatorException(
-        errorCode = AccountManager.ERROR_CODE_UNSUPPORTED_OPERATION,
-        errorMessage = "$operation is not supported"
-    )
-
-    class AccountNotFound(account: Account) : AuthenticatorException(
-        errorCode = AccountManager.ERROR_CODE_BAD_ARGUMENTS,
-        errorMessage = "$account not found"
-    )
-
-    object Unauthorized : AuthenticatorException(
-        errorCode = ErrorCode.Unauthorized.ordinal,
-        errorMessage = "E-mail or password weren't correct"
-    )
-
-    object NotMealie : AuthenticatorException(
-        errorCode = ErrorCode.NotMealie.ordinal,
-        errorMessage = "Base URL must be pointing at a non Mealie server"
-    )
-
-    enum class ErrorCode { NotMealie, Unauthorized; }
-}

app/src/main/java/gq/kirmanak/mealient/ui/addaccount/AddAccountActivity.kt

@@ -1,19 +0,0 @@
-package gq.kirmanak.mealient.ui.addaccount
-
-import android.os.Bundle
-import android.os.PersistableBundle
-import androidx.activity.viewModels
-import androidx.appcompat.app.AppCompatActivity
-import dagger.hilt.android.AndroidEntryPoint
-import gq.kirmanak.mealient.R
-
-@AndroidEntryPoint
-class AddAccountActivity : AppCompatActivity() {
-
-    private val viewModel by viewModels<AddAccountViewModel>()
-
-    override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
-        super.onCreate(savedInstanceState, persistentState)
-        supportActionBar?.title = getString(R.string.app_name)
-    }
-}

app/src/main/java/gq/kirmanak/mealient/ui/addaccount/AddAccountFragment.kt

@@ -1,64 +0,0 @@
-package gq.kirmanak.mealient.ui.addaccount
-
-import android.os.Bundle
-import android.view.View
-import androidx.fragment.app.Fragment
-import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.lifecycleScope
-import by.kirich1409.viewbindingdelegate.viewBinding
-import dagger.hilt.android.AndroidEntryPoint
-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 kotlinx.coroutines.launch
-import timber.log.Timber
-
-@AndroidEntryPoint
-class AddAccountFragment : Fragment(R.layout.fragment_authentication) {
-
-    private val binding by viewBinding(FragmentAuthenticationBinding::bind)
-    private val viewModel by activityViewModels<AddAccountViewModel>()
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-        Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
-        binding.button.setOnClickListener { onLoginClicked() }
-    }
-
-    private fun onLoginClicked(): Unit = with(binding) {
-        Timber.v("onLoginClicked() called")
-
-        val email: String = emailInput.checkIfInputIsEmpty(
-            inputLayout = emailInputLayout,
-            lifecycleOwner = viewLifecycleOwner,
-            stringId = R.string.fragment_authentication_email_input_empty,
-        ) ?: return
-
-        val pass: String = passwordInput.checkIfInputIsEmpty(
-            inputLayout = passwordInputLayout,
-            lifecycleOwner = viewLifecycleOwner,
-            stringId = R.string.fragment_authentication_password_input_empty,
-            trim = false,
-        ) ?: return
-
-        button.isClickable = false
-        viewLifecycleOwner.lifecycleScope.launch {
-            onAuthenticationResult(viewModel.authenticate(email, pass))
-        }
-    }
-
-    private fun onAuthenticationResult(result: Result<Unit>) {
-        Timber.v("onAuthenticationResult() called with: result = $result")
-        if (result.isSuccess) {
-            TODO("Implement authentication success")
-        }
-
-        binding.passwordInputLayout.error = when (result.exceptionOrNull()) {
-            is NetworkError.Unauthorized -> getString(R.string.fragment_authentication_credentials_incorrect)
-            else -> null
-        }
-
-        binding.button.isClickable = true
-    }
-}

app/src/main/java/gq/kirmanak/mealient/ui/addaccount/AddAccountViewModel.kt

@@ -1,20 +0,0 @@
-package gq.kirmanak.mealient.ui.addaccount
-
-import androidx.lifecycle.ViewModel
-import dagger.hilt.android.lifecycle.HiltViewModel
-import gq.kirmanak.mealient.data.auth.AuthRepo
-import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
-import timber.log.Timber
-
-@HiltViewModel
-class AddAccountViewModel(
-    private val authRepo: AuthRepo,
-) : ViewModel() {
-
-    suspend fun authenticate(username: String, password: String) = runCatchingExceptCancel {
-        Timber.v("authenticate() called with: username = $username, password = $password")
-        authRepo.authenticate(username, password)
-    }.onFailure {
-        Timber.e(it, "authenticate: can't authenticate")
-    }
-}

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

@@ -5,7 +5,6 @@ import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import by.kirich1409.viewbindingdelegate.viewBinding
 import dagger.hilt.android.AndroidEntryPoint
@@ -13,8 +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.extensions.executeOnceOnBackPressed
+import gq.kirmanak.mealient.extensions.launchWithViewLifecycle
-import kotlinx.coroutines.launch
 import timber.log.Timber
 
 @AndroidEntryPoint
@@ -22,12 +20,6 @@ class AuthenticationFragment : Fragment(R.layout.fragment_authentication) {
     private val binding by viewBinding(FragmentAuthenticationBinding::bind)
     private val viewModel by activityViewModels<AuthenticationViewModel>()
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        Timber.v("onCreate() called with: savedInstanceState = $savedInstanceState")
-        executeOnceOnBackPressed { viewModel.authRequested = false }
-    }
-
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
@@ -53,9 +45,7 @@ class AuthenticationFragment : Fragment(R.layout.fragment_authentication) {
         ) ?: return
 
         button.isClickable = false
-        viewLifecycleOwner.lifecycleScope.launch {
+        launchWithViewLifecycle { onAuthenticationResult(viewModel.authenticate(email, pass)) }
-            onAuthenticationResult(viewModel.authenticate(email, pass))
-        }
     }
 
     private fun onAuthenticationResult(result: Result<Unit>) {

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

@@ -4,22 +4,19 @@ import timber.log.Timber
 
 enum class AuthenticationState {
     AUTHORIZED,
-    AUTH_REQUESTED,
     UNAUTHORIZED,
     UNKNOWN;
 
     companion object {
 
         fun determineState(
-            isLoginRequested: Boolean,
             showLoginButton: Boolean,
             isAuthorized: Boolean,
         ): AuthenticationState {
-            Timber.v("determineState() called with: isLoginRequested = $isLoginRequested, showLoginButton = $showLoginButton, isAuthorized = $isAuthorized")
+            Timber.v("determineState() called with: showLoginButton = $showLoginButton, isAuthorized = $isAuthorized")
             val result = when {
                 !showLoginButton -> UNKNOWN
                 isAuthorized -> AUTHORIZED
-                isLoginRequested -> AUTH_REQUESTED
                 else -> UNAUTHORIZED
             }
             Timber.v("determineState() returned: $result")

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

@@ -18,21 +18,18 @@ class AuthenticationViewModel @Inject constructor(
     private val authRepo: AuthRepo,
 ) : ViewModel() {
 
-    private val authRequestsFlow = MutableStateFlow(false)
     private val showLoginButtonFlow = MutableStateFlow(false)
     private val authenticationStateFlow = combine(
-        authRequestsFlow,
         showLoginButtonFlow,
         authRepo.isAuthorizedFlow,
         AuthenticationState::determineState
     )
     val authenticationStateLive: LiveData<AuthenticationState>
         get() = authenticationStateFlow.asLiveData()
-    var authRequested: Boolean by authRequestsFlow::value
     var showLoginButton: Boolean by showLoginButtonFlow::value
 
-    suspend fun authenticate(username: String, password: String) = runCatchingExceptCancel {
+    suspend fun authenticate(email: String, password: String) = runCatchingExceptCancel {
-        authRepo.authenticate(username, password)
+        authRepo.authenticate(email, password)
     }.onFailure {
         Timber.e(it, "authenticate: can't authenticate")
     }

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

@@ -11,6 +11,7 @@ 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.extensions.launchWithViewLifecycle
 import timber.log.Timber
 
 @AndroidEntryPoint
@@ -22,7 +23,6 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
-        viewModel.screenState.observe(viewLifecycleOwner, ::updateState)
         binding.button.setOnClickListener(::onProceedClick)
     }
 
@@ -33,16 +33,16 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
             lifecycleOwner = viewLifecycleOwner,
             stringId = R.string.fragment_baseurl_url_input_empty,
         ) ?: return
-        viewModel.saveBaseUrl(url)
+        launchWithViewLifecycle { onCheckURLResult(viewModel.saveBaseUrl(url)) }
     }
 
-    private fun updateState(baseURLScreenState: BaseURLScreenState) {
+    private fun onCheckURLResult(result: Result<Unit>) {
-        Timber.v("updateState() called with: baseURLScreenState = $baseURLScreenState")
+        Timber.v("onCheckURLResult() called with: result = $result")
-        if (baseURLScreenState.navigateNext) {
+        if (result.isSuccess) {
             findNavController().navigate(BaseURLFragmentDirections.actionBaseURLFragmentToRecipesFragment())
             return
         }
-        binding.urlInputLayout.error = when (val exception = baseURLScreenState.error) {
+        binding.urlInputLayout.error = when (val exception = result.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 -> {

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

@@ -1,8 +0,0 @@
-package gq.kirmanak.mealient.ui.baseurl
-
-import gq.kirmanak.mealient.data.network.NetworkError
-
-data class BaseURLScreenState(
-    val error: NetworkError? = null,
-    val navigateNext: Boolean = false,
-)

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

@@ -1,14 +1,10 @@
 package gq.kirmanak.mealient.ui.baseurl
 
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.data.baseurl.BaseURLStorage
 import gq.kirmanak.mealient.data.baseurl.VersionDataSource
-import gq.kirmanak.mealient.data.network.NetworkError
+import gq.kirmanak.mealient.extensions.runCatchingExceptCancel
-import kotlinx.coroutines.launch
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -18,35 +14,21 @@ class BaseURLViewModel @Inject constructor(
     private val versionDataSource: VersionDataSource,
 ) : ViewModel() {
 
-    private val _screenState = MutableLiveData(BaseURLScreenState())
+    suspend fun saveBaseUrl(baseURL: String): Result<Unit> {
-    var currentScreenState: BaseURLScreenState
-        get() = _screenState.value!!
-        private set(value) {
-            _screenState.value = value
-        }
-    val screenState: LiveData<BaseURLScreenState>
-        get() = _screenState
-
-    fun saveBaseUrl(baseURL: String) {
         Timber.v("saveBaseUrl() called with: baseURL = $baseURL")
         val hasPrefix = ALLOWED_PREFIXES.any { baseURL.startsWith(it) }
         val url = baseURL.takeIf { hasPrefix } ?: WITH_PREFIX_FORMAT.format(baseURL)
-        viewModelScope.launch { checkBaseURL(url) }
+        return checkBaseURL(url)
     }
 
-    private suspend fun checkBaseURL(baseURL: String) {
+    private suspend fun checkBaseURL(baseURL: String): Result<Unit> {
         Timber.v("checkBaseURL() called with: baseURL = $baseURL")
-        val version = try {
+        val result = runCatchingExceptCancel {
             // If it returns proper version info then it must be a Mealie
             versionDataSource.getVersionInfo(baseURL)
-        } catch (e: NetworkError) {
-            Timber.e(e, "checkBaseURL: can't get version info")
-            currentScreenState = BaseURLScreenState(e, false)
-            return
         }
-        Timber.d("checkBaseURL: version is $version")
         baseURLStorage.storeBaseURL(baseURL)
-        currentScreenState = BaseURLScreenState(null, true)
+        return result.map { }
     }
 
     companion object {

app/src/main/java/gq/kirmanak/mealient/ui/recipes/RecipesFragment.kt

@@ -14,7 +14,6 @@ import gq.kirmanak.mealient.data.recipes.db.entity.RecipeSummaryEntity
 import gq.kirmanak.mealient.databinding.FragmentRecipesBinding
 import gq.kirmanak.mealient.extensions.collectWithViewLifecycle
 import gq.kirmanak.mealient.extensions.refreshRequestFlow
-import gq.kirmanak.mealient.ui.auth.AuthenticationState
 import gq.kirmanak.mealient.ui.auth.AuthenticationViewModel
 import timber.log.Timber
 
@@ -24,19 +23,6 @@ class RecipesFragment : Fragment(R.layout.fragment_recipes) {
     private val viewModel by viewModels<RecipeViewModel>()
     private val authViewModel by activityViewModels<AuthenticationViewModel>()
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        Timber.v("onCreate() called with: savedInstanceState = $savedInstanceState")
-        authViewModel.authenticationStateLive.observe(this, ::onAuthStateChange)
-    }
-
-    private fun onAuthStateChange(authenticationState: AuthenticationState) {
-        Timber.v("onAuthStateChange() called with: authenticationState = $authenticationState")
-        if (authenticationState == AuthenticationState.AUTH_REQUESTED) {
-            findNavController().navigate(RecipesFragmentDirections.actionRecipesFragmentToAuthenticationFragment())
-        }
-    }
-
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")

app/src/main/res/navigation/nav_graph.xml

@@ -9,15 +9,16 @@
 		android:id="@+id/authenticationFragment"
 		android:name="gq.kirmanak.mealient.ui.auth.AuthenticationFragment"
 		android:label="AuthenticationFragment"
-		tools:layout="@layout/fragment_authentication" />
+		tools:layout="@layout/fragment_authentication">
+		<deepLink
+			android:id="@+id/deepLink"
+			app:uri="mealient://authenticate" />
+	</fragment>
 	<fragment
 		android:id="@+id/recipesFragment"
 		android:name="gq.kirmanak.mealient.ui.recipes.RecipesFragment"
 		android:label="fragment_recipes"
 		tools:layout="@layout/fragment_recipes">
-		<action
-			android:id="@+id/action_recipesFragment_to_authenticationFragment"
-			app:destination="@id/authenticationFragment" />
 		<action
 			android:id="@+id/action_recipesFragment_to_recipeInfoFragment"
 			app:destination="@id/recipeInfoFragment" />

app/src/main/res/xml/account_authenticator.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<account-authenticator xmlns:android="http://schemas.android.com/apk/res/android"
-    android:accountType="@string/account_type"
-    android:icon="@mipmap/ic_launcher"
-    android:label="@string/app_name" />

app/src/test/java/gq/kirmanak/mealient/data/auth/impl/AuthDataSourceImplTest.kt

@@ -32,7 +32,7 @@ class AuthDataSourceImplTest {
     fun setUp() {
         MockKAnnotations.init(this)
         subject = AuthDataSourceImpl(authServiceFactory, NetworkModule.createJson())
-        coEvery { authServiceFactory.provideService(any(), eq(false)) } returns authService
+        coEvery { authServiceFactory.provideService(any()) } returns authService
     }
 
     @Test
@@ -72,7 +72,7 @@ class AuthDataSourceImplTest {
     @Test(expected = MalformedUrl::class)
     fun `when authenticate and provideService throws then MalformedUrl`() = runTest {
         coEvery {
-            authServiceFactory.provideService(any(), eq(false))
+            authServiceFactory.provideService(any())
         } throws MalformedUrl(RuntimeException())
         callAuthenticate()
     }

app/src/test/java/gq/kirmanak/mealient/data/auth/impl/AuthRepoImplTest.kt

@@ -1,22 +0,0 @@
-package gq.kirmanak.mealient.data.auth.impl
-
-import gq.kirmanak.mealient.service.auth.AccountManagerInteractor
-import io.mockk.MockKAnnotations
-import io.mockk.impl.annotations.MockK
-import org.junit.Before
-
-class AuthRepoImplTest {
-
-    @MockK
-    lateinit var accountManagerInteractor: AccountManagerInteractor
-
-    lateinit var subject: AuthRepoImpl
-
-    @Before
-    fun setUp() {
-        MockKAnnotations.init(this)
-        subject = AuthRepoImpl(accountManagerInteractor)
-    }
-
-    // TODO write the actual tests
-}

app/src/test/java/gq/kirmanak/mealient/data/network/AuthenticationInterceptorTest.kt

@@ -66,7 +66,7 @@ class AuthenticationInterceptorTest {
 
         coVerifySequence {
             authRepo.getAuthHeader()
-            authRepo.invalidateAuthHeader(TEST_AUTH_HEADER)
+            authRepo.invalidateAuthHeader()
             authRepo.getAuthHeader()
         }
     }

app/src/test/java/gq/kirmanak/mealient/data/network/RetrofitServiceFactoryTest.kt

@@ -33,7 +33,7 @@ class RetrofitServiceFactoryTest {
     fun setUp() {
         MockKAnnotations.init(this)
         subject = retrofitBuilder.createServiceFactory(baseURLStorage)
-        coEvery { retrofitBuilder.buildRetrofit(any(), eq(true)) } returns retrofit
+        coEvery { retrofitBuilder.buildRetrofit(any()) } returns retrofit
         every { retrofit.create(eq(VersionService::class.java)) } returns versionService
         coEvery { baseURLStorage.requireBaseURL() } returns TEST_BASE_URL
     }
@@ -53,7 +53,7 @@ class RetrofitServiceFactoryTest {
     fun `when provideService called twice then builder called once`() = runTest {
         subject.provideService()
         subject.provideService()
-        coVerifyAll { retrofitBuilder.buildRetrofit(eq(TEST_BASE_URL), eq(true)) }
+        coVerifyAll { retrofitBuilder.buildRetrofit(eq(TEST_BASE_URL)) }
     }
 
     @Test
@@ -61,8 +61,8 @@ class RetrofitServiceFactoryTest {
         subject.provideService()
         subject.provideService("new url")
         coVerifyAll {
-            retrofitBuilder.buildRetrofit(eq(TEST_BASE_URL), eq(true))
+            retrofitBuilder.buildRetrofit(eq(TEST_BASE_URL))
-            retrofitBuilder.buildRetrofit(eq("new url"), eq(true))
+            retrofitBuilder.buildRetrofit(eq("new url"))
         }
     }
 }

app/src/test/java/gq/kirmanak/mealient/ui/baseurl/BaseURLViewModelTest.kt

@@ -1,10 +1,8 @@
 package gq.kirmanak.mealient.ui.baseurl
 
-import com.google.common.truth.Truth.assertThat
 import gq.kirmanak.mealient.data.baseurl.BaseURLStorage
 import gq.kirmanak.mealient.data.baseurl.VersionDataSource
 import gq.kirmanak.mealient.data.baseurl.VersionInfo
-import gq.kirmanak.mealient.data.network.NetworkError
 import gq.kirmanak.mealient.test.AuthImplTestData.TEST_BASE_URL
 import gq.kirmanak.mealient.test.RobolectricTest
 import io.mockk.MockKAnnotations
@@ -34,35 +32,6 @@ class BaseURLViewModelTest : RobolectricTest() {
         subject = BaseURLViewModel(baseURLStorage, versionDataSource)
     }
 
-    @Test
-    fun `when initialized then error is null`() {
-        assertThat(subject.currentScreenState.error).isNull()
-    }
-
-    @Test
-    fun `when initialized then navigateNext is false`() {
-        assertThat(subject.currentScreenState.navigateNext).isFalse()
-    }
-
-    @Test
-    fun `when saveBaseUrl and getVersionInfo throws then state is correct`() = runTest {
-        val error = NetworkError.Unauthorized(RuntimeException())
-        coEvery { versionDataSource.getVersionInfo(eq(TEST_BASE_URL)) } throws error
-        subject.saveBaseUrl(TEST_BASE_URL)
-        advanceUntilIdle()
-        assertThat(subject.currentScreenState).isEqualTo(BaseURLScreenState(error, false))
-    }
-
-    @Test
-    fun `when saveBaseUrl and getVersionInfo returns result then state is correct`() = runTest {
-        coEvery {
-            versionDataSource.getVersionInfo(eq(TEST_BASE_URL))
-        } returns VersionInfo(true, "0.5.6", true)
-        subject.saveBaseUrl(TEST_BASE_URL)
-        advanceUntilIdle()
-        assertThat(subject.currentScreenState).isEqualTo(BaseURLScreenState(null, true))
-    }
-
     @Test
     fun `when saveBaseUrl and getVersionInfo returns result then saves to storage`() = runTest {
         coEvery {