Implement sending logs to developer (#190)

* Save logs to a file

* Send logs via email

* Enable network logs in release builds

* Remove useless chooser title

* Append to logs file and ignore I/O errors

* Ensure email and password are not logged

* Ensure base URL is never logged

* Add logs disclaimer

app/src/main/AndroidManifest.xml

@@ -1,46 +1,56 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools">
 
-	<uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.INTERNET" />
-	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
-	<application
+    <application
-		android:name="gq.kirmanak.mealient.App"
+        android:name="gq.kirmanak.mealient.App"
-		android:allowBackup="false"
+        android:allowBackup="false"
-		android:dataExtractionRules="@xml/data_extraction_rules"
+        android:dataExtractionRules="@xml/data_extraction_rules"
-		android:fullBackupContent="@xml/full_backup_rules"
+        android:fullBackupContent="@xml/full_backup_rules"
-		android:icon="@mipmap/ic_launcher"
+        android:icon="@mipmap/ic_launcher"
-		android:label="@string/app_name"
+        android:label="@string/app_name"
-		android:networkSecurityConfig="@xml/network_security_config"
+        android:localeConfig="@xml/locales_config"
-		android:roundIcon="@mipmap/ic_launcher"
+        android:networkSecurityConfig="@xml/network_security_config"
-		android:supportsRtl="true"
+        android:roundIcon="@mipmap/ic_launcher"
-		android:theme="@style/Theme.App.Starting"
+        android:supportsRtl="true"
-		android:localeConfig="@xml/locales_config"
+        android:theme="@style/Theme.App.Starting"
-		tools:ignore="UnusedAttribute">
+        tools:ignore="UnusedAttribute">
-		<activity
+        <activity
-			android:name=".ui.activity.MainActivity"
+            android:name=".ui.activity.MainActivity"
-			android:exported="true"
+            android:exported="true"
-			android:windowSoftInputMode="adjustPan">
+            android:windowSoftInputMode="adjustPan">
-			<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>
-		<activity
+        <activity
-			android:name=".ui.share.ShareRecipeActivity"
+            android:name=".ui.share.ShareRecipeActivity"
-			android:exported="true"
+            android:exported="true"
-			android:theme="@style/AppTheme">
+            android:theme="@style/AppTheme">
-			<intent-filter>
+            <intent-filter>
-				<action android:name="android.intent.action.SEND" />
+                <action android:name="android.intent.action.SEND" />
-				<category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.DEFAULT" />
-				<data android:mimeType="text/plain" />
+                <data android:mimeType="text/plain" />
-			</intent-filter>
+            </intent-filter>
-			<meta-data
+            <meta-data
-				android:name="android.service.chooser.chooser_target_service"
+                android:name="android.service.chooser.chooser_target_service"
-				android:value="androidx.sharetarget.ChooserTargetServiceCompat" />
+                android:value="androidx.sharetarget.ChooserTargetServiceCompat" />
-		</activity>
+        </activity>
-	</application>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_provider_paths" />
+        </provider>
+    </application>
 
 </manifest>

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

@@ -15,17 +15,20 @@ class AuthRepoImpl @Inject constructor(
     private val authDataSource: AuthDataSource,
     private val logger: Logger,
     private val signOutHandler: SignOutHandler,
+    private val credentialsLogRedactor: CredentialsLogRedactor,
 ) : AuthRepo, AuthenticationProvider {
 
     override val isAuthorizedFlow: Flow<Boolean>
         get() = authStorage.authTokenFlow.map { it != null }
 
     override suspend fun authenticate(email: String, password: String) {
-        logger.v { "authenticate() called with: email = $email, password = $password" }
+        logger.v { "authenticate() called" }
+        credentialsLogRedactor.set(email, password)
         val token = authDataSource.authenticate(email, password)
         authStorage.setAuthToken(token)
         val apiToken = authDataSource.createApiToken(API_TOKEN_NAME)
         authStorage.setAuthToken(apiToken)
+        credentialsLogRedactor.clear()
     }
 
     override suspend fun getAuthToken(): String? = authStorage.getAuthToken()

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

@@ -0,0 +1,38 @@
+package gq.kirmanak.mealient.data.auth.impl
+
+import gq.kirmanak.mealient.logging.LogRedactor
+import kotlinx.coroutines.flow.MutableStateFlow
+import java.net.URLEncoder
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class CredentialsLogRedactor @Inject constructor() : LogRedactor {
+
+    private data class Credentials(
+        val login: String,
+        val password: String,
+        val urlEncodedLogin: String = URLEncoder.encode(login, Charsets.UTF_8.name()),
+        val urlEncodedPassword: String = URLEncoder.encode(password, Charsets.UTF_8.name()),
+    )
+
+    private val credentialsState = MutableStateFlow<Credentials?>(null)
+
+    fun set(login: String, password: String) {
+        credentialsState.value = Credentials(login, password)
+    }
+
+    fun clear() {
+        credentialsState.value = null
+    }
+
+    override fun redact(message: String): String {
+        val credentials = credentialsState.value ?: return message
+
+        return message
+            .replace(credentials.login, "<login>")
+            .replace(credentials.urlEncodedLogin, "<login>")
+            .replace(credentials.password, "<password>")
+            .replace(credentials.urlEncodedPassword, "<password>")
+    }
+}

app/src/main/java/gq/kirmanak/mealient/data/baseurl/impl/BaseUrlLogRedactor.kt

@@ -0,0 +1,49 @@
+package gq.kirmanak.mealient.data.baseurl.impl
+
+import androidx.core.net.toUri
+import gq.kirmanak.mealient.architecture.configuration.AppDispatchers
+import gq.kirmanak.mealient.data.baseurl.ServerInfoStorage
+import gq.kirmanak.mealient.logging.LogRedactor
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+
+@Singleton
+class BaseUrlLogRedactor @Inject constructor(
+    private val serverInfoStorageProvider: Provider<ServerInfoStorage>,
+    private val dispatchers: AppDispatchers,
+) : LogRedactor {
+
+    private val hostState = MutableStateFlow<String?>(null)
+
+    init {
+        setInitialBaseUrl()
+    }
+
+    private fun setInitialBaseUrl() {
+        val scope = CoroutineScope(dispatchers.default + SupervisorJob())
+        scope.launch {
+            val serverInfoStorage = serverInfoStorageProvider.get()
+            hostState.compareAndSet(
+                expect = null,
+                update = serverInfoStorage.getBaseURL()?.extractHost(),
+            )
+        }
+    }
+
+    fun set(baseUrl: String) {
+        hostState.value = baseUrl.extractHost()
+    }
+
+
+    override fun redact(message: String): String {
+        val host = hostState.value ?: return message
+        return message.replace(host, "<host>")
+    }
+}
+
+private fun String.extractHost() = runCatching { toUri() }.getOrNull()?.host

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

@@ -4,13 +4,16 @@ import dagger.Binds
 import dagger.Module
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import dagger.multibindings.IntoSet
 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.AuthStorageImpl
+import gq.kirmanak.mealient.data.auth.impl.CredentialsLogRedactor
 import gq.kirmanak.mealient.datasource.AuthenticationProvider
+import gq.kirmanak.mealient.logging.LogRedactor
 import gq.kirmanak.mealient.shopping_lists.repo.ShoppingListsAuthRepo
 
 @Module
@@ -31,4 +34,8 @@ interface AuthModule {
 
     @Binds
     fun bindShoppingListsAuthRepo(impl: AuthRepoImpl): ShoppingListsAuthRepo
+
+    @Binds
+    @IntoSet
+    fun bindCredentialsLogRedactor(impl: CredentialsLogRedactor): LogRedactor
 }

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

@@ -4,9 +4,12 @@ import dagger.Binds
 import dagger.Module
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import dagger.multibindings.IntoSet
 import gq.kirmanak.mealient.data.baseurl.*
+import gq.kirmanak.mealient.data.baseurl.impl.BaseUrlLogRedactor
 import gq.kirmanak.mealient.data.baseurl.impl.ServerInfoStorageImpl
 import gq.kirmanak.mealient.datasource.ServerUrlProvider
+import gq.kirmanak.mealient.logging.LogRedactor
 
 @Module
 @InstallIn(SingletonComponent::class)
@@ -23,4 +26,8 @@ interface BaseURLModule {
 
     @Binds
     fun bindServerUrlProvider(serverInfoRepoImpl: ServerInfoRepoImpl): ServerUrlProvider
+
+    @Binds
+    @IntoSet
+    fun bindBaseUrlLogRedactor(impl: BaseUrlLogRedactor): LogRedactor
 }

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

@@ -73,7 +73,6 @@ fun EditText.checkIfInputIsEmpty(
 ): String? {
     val input = if (trim) text?.trim() else text
     val text = input?.toString().orEmpty()
-    logger.d { "Input text is \"$text\"" }
     return text.ifEmpty {
         inputLayout.error = resources.getString(stringId)
         val textChangesLiveData = textChangesLiveData(logger)

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

@@ -1,8 +1,11 @@
 package gq.kirmanak.mealient.ui.activity
 
+import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.MenuItem
 import androidx.activity.viewModels
+import androidx.core.content.FileProvider
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.core.view.isVisible
 import androidx.core.view.iterator
@@ -10,6 +13,7 @@ import androidx.drawerlayout.widget.DrawerLayout
 import androidx.navigation.NavController
 import androidx.navigation.NavDirections
 import androidx.navigation.fragment.NavHostFragment
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
 import gq.kirmanak.mealient.NavGraphDirections.Companion.actionGlobalAddRecipeFragment
 import gq.kirmanak.mealient.NavGraphDirections.Companion.actionGlobalAuthenticationFragment
@@ -20,10 +24,13 @@ import gq.kirmanak.mealient.R
 import gq.kirmanak.mealient.databinding.MainActivityBinding
 import gq.kirmanak.mealient.extensions.collectWhenResumed
 import gq.kirmanak.mealient.extensions.observeOnce
+import gq.kirmanak.mealient.logging.getLogFile
 import gq.kirmanak.mealient.ui.ActivityUiState
 import gq.kirmanak.mealient.ui.BaseActivity
 import gq.kirmanak.mealient.ui.CheckableMenuItem
 
+private const val EMAIL_FOR_LOGS = "mealient@gmail.com"
+
 @AndroidEntryPoint
 class MainActivity : BaseActivity<MainActivityBinding>(
     binder = MainActivityBinding::bind,
@@ -87,6 +94,12 @@ class MainActivity : BaseActivity<MainActivityBinding>(
                 viewModel.logout()
                 return true
             }
+
+            R.id.email_logs -> {
+                emailLogs()
+                return true
+            }
+
             else -> throw IllegalArgumentException("Unknown menu item id: ${menuItem.itemId}")
         }
         menuItem.isChecked = true
@@ -94,6 +107,39 @@ class MainActivity : BaseActivity<MainActivityBinding>(
         return true
     }
 
+    private fun emailLogs() {
+        MaterialAlertDialogBuilder(this)
+            .setMessage(R.string.activity_main_email_logs_confirmation_message)
+            .setTitle(R.string.activity_main_email_logs_confirmation_title)
+            .setPositiveButton(R.string.activity_main_email_logs_confirmation_positive) { _, _ -> doEmailLogs() }
+            .setNegativeButton(R.string.activity_main_email_logs_confirmation_negative, null)
+            .show()
+    }
+
+    private fun doEmailLogs() {
+        val logFileUri = try {
+            FileProvider.getUriForFile(this, "$packageName.provider", getLogFile())
+        } catch (e: Exception) {
+            return
+        }
+        val emailIntent = buildIntent(logFileUri)
+        val chooserIntent = Intent.createChooser(emailIntent, null)
+        startActivity(chooserIntent)
+    }
+
+    private fun buildIntent(logFileUri: Uri?): Intent {
+        val emailIntent = Intent(Intent.ACTION_SEND)
+        val to = arrayOf(EMAIL_FOR_LOGS)
+        emailIntent.setType("text/plain")
+        emailIntent.putExtra(Intent.EXTRA_EMAIL, to)
+        emailIntent.putExtra(Intent.EXTRA_STREAM, logFileUri)
+        emailIntent.putExtra(
+            Intent.EXTRA_SUBJECT,
+            getString(R.string.activity_main_email_logs_subject)
+        )
+        return emailIntent
+    }
+
     private fun onUiStateChange(uiState: ActivityUiState) {
         logger.v { "onUiStateChange() called with: uiState = $uiState" }
         val checkedMenuItem = when (uiState.checkedMenuItem) {

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

@@ -22,7 +22,7 @@ class AuthenticationViewModel @Inject constructor(
     val uiState: LiveData<OperationUiState<Unit>> get() = _uiState
 
     fun authenticate(email: String, password: String) {
-        logger.v { "authenticate() called with: email = $email, password = $password" }
+        logger.v { "authenticate() called" }
         _uiState.value = OperationUiState.Progress()
         viewModelScope.launch {
             val result = runCatchingExceptCancel { authRepo.authenticate(email, password) }

app/src/main/java/gq/kirmanak/mealient/ui/baseurl/BaseURLViewModel.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.data.baseurl.ServerInfoRepo
+import gq.kirmanak.mealient.data.baseurl.impl.BaseUrlLogRedactor
 import gq.kirmanak.mealient.data.recipes.RecipeRepo
 import gq.kirmanak.mealient.datasource.CertificateCombinedException
 import gq.kirmanak.mealient.datasource.NetworkError
@@ -27,6 +28,7 @@ class BaseURLViewModel @Inject constructor(
     private val recipeRepo: RecipeRepo,
     private val logger: Logger,
     private val trustedCertificatesStore: TrustedCertificatesStore,
+    private val baseUrlLogRedactor: BaseUrlLogRedactor,
 ) : ViewModel() {
 
     private val _uiState = MutableLiveData<OperationUiState<Unit>>(OperationUiState.Initial())
@@ -36,18 +38,20 @@ class BaseURLViewModel @Inject constructor(
     val invalidCertificatesFlow = invalidCertificatesChannel.receiveAsFlow()
 
     fun saveBaseUrl(baseURL: String) {
-        logger.v { "saveBaseUrl() called with: baseURL = $baseURL" }
+        logger.v { "saveBaseUrl() called" }
         _uiState.value = OperationUiState.Progress()
         viewModelScope.launch { checkBaseURL(baseURL) }
     }
 
     private suspend fun checkBaseURL(baseURL: String) {
-        logger.v { "checkBaseURL() called with: baseURL = $baseURL" }
+        logger.v { "checkBaseURL() called" }
 
         val hasPrefix = listOf("http://", "https://").any { baseURL.startsWith(it) }
         val urlWithPrefix = baseURL.takeIf { hasPrefix } ?: "https://%s".format(baseURL)
         val url = urlWithPrefix.trimEnd { it == '/' }
 
+        baseUrlLogRedactor.set(baseUrl = url)
+
         logger.d { "checkBaseURL: Created URL = \"$url\", with prefix = \"$urlWithPrefix\"" }
         if (url == serverInfoRepo.getUrl()) {
             logger.d { "checkBaseURL: new URL matches current" }

app/src/main/res/drawable/ic_send.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal"
+    android:autoMirrored="true">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M120,800L120,160L880,480L120,800ZM200,680L674,480L200,280L200,420L440,480L200,540L200,680ZM200,680L200,480L200,280L200,420L200,420L200,540L200,540L200,680Z" />
+</vector>

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

@@ -1,46 +1,45 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
-	xmlns:tools="http://schemas.android.com/tools"
+    xmlns:tools="http://schemas.android.com/tools"
-	android:id="@+id/drawer"
+    android:id="@+id/drawer"
-	style="?drawerLayoutStyle"
+    style="?drawerLayoutStyle"
-	android:layout_width="match_parent"
+    android:layout_width="match_parent"
-	android:layout_height="match_parent"
+    android:layout_height="match_parent"
-	tools:context=".ui.activity.MainActivity">
+    tools:context=".ui.activity.MainActivity">
 
-	<androidx.constraintlayout.widget.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
-		android:layout_width="match_parent"
+        android:layout_width="match_parent"
-		android:layout_height="match_parent">
+        android:layout_height="match_parent">
 
-		<gq.kirmanak.mealient.ui.activity.ToolbarView
+        <gq.kirmanak.mealient.ui.activity.ToolbarView
-			android:id="@+id/toolbar"
+            android:id="@+id/toolbar"
-			android:layout_width="0dp"
+            android:layout_width="0dp"
-			android:layout_height="wrap_content"
+            android:layout_height="wrap_content"
-			android:layout_marginHorizontal="@dimen/margin_medium"
+            android:layout_marginHorizontal="@dimen/margin_medium"
-			android:background="@drawable/bg_toolbar"
+            android:background="@drawable/bg_toolbar"
-			app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
-			app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
-			app:layout_constraintTop_toTopOf="parent" />
+            app:layout_constraintTop_toTopOf="parent" />
 
-		<androidx.fragment.app.FragmentContainerView
+        <androidx.fragment.app.FragmentContainerView
-			android:id="@+id/nav_host"
+            android:id="@+id/nav_host"
-			android:name="androidx.navigation.fragment.NavHostFragment"
+            android:name="androidx.navigation.fragment.NavHostFragment"
-			android:layout_width="0dp"
+            android:layout_width="0dp"
-			android:layout_height="0dp"
+            android:layout_height="0dp"
-			android:layout_marginTop="@dimen/margin_small"
+            android:layout_marginTop="@dimen/margin_small"
-			app:defaultNavHost="true"
+            app:defaultNavHost="true"
-			app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
-			app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
-			app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
-			app:layout_constraintTop_toBottomOf="@id/toolbar"
+            app:layout_constraintTop_toBottomOf="@id/toolbar" />
-			tools:layout="@layout/fragment_recipes_list" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
-	</androidx.constraintlayout.widget.ConstraintLayout>
 
-	<com.google.android.material.navigation.NavigationView
+    <com.google.android.material.navigation.NavigationView
-		android:id="@+id/navigation_view"
+        android:id="@+id/navigation_view"
-		android:layout_width="wrap_content"
+        android:layout_width="wrap_content"
-		android:layout_height="match_parent"
+        android:layout_height="match_parent"
-		android:layout_gravity="start"
+        android:layout_gravity="start"
-		app:headerLayout="@layout/view_navigation_drawer_header"
+        app:headerLayout="@layout/view_navigation_drawer_header"
-		app:menu="@menu/navigation_menu" />
+        app:menu="@menu/navigation_menu" />
 </androidx.drawerlayout.widget.DrawerLayout>

app/src/main/res/menu/navigation_menu.xml

@@ -1,38 +1,43 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
-	<item
+    <item
-		android:id="@+id/recipes_list"
+        android:id="@+id/recipes_list"
-		android:checkable="true"
+        android:checkable="true"
-		android:icon="@drawable/ic_list"
+        android:icon="@drawable/ic_list"
-		android:title="@string/menu_navigation_drawer_recipes_list" />
+        android:title="@string/menu_navigation_drawer_recipes_list" />
 
-	<item
+    <item
-		android:id="@+id/add_recipe"
+        android:id="@+id/add_recipe"
-		android:checkable="true"
+        android:checkable="true"
-		android:icon="@drawable/ic_add"
+        android:icon="@drawable/ic_add"
-		android:title="@string/menu_navigation_drawer_add_recipe" />
+        android:title="@string/menu_navigation_drawer_add_recipe" />
 
-	<item
+    <item
-		android:id="@+id/shopping_lists"
+        android:id="@+id/shopping_lists"
-		android:checkable="true"
+        android:checkable="true"
-		android:icon="@drawable/ic_shopping_cart"
+        android:icon="@drawable/ic_shopping_cart"
-		android:title="@string/menu_navigation_drawer_shopping_lists" />
+        android:title="@string/menu_navigation_drawer_shopping_lists" />
 
-	<item
+    <item
-		android:id="@+id/change_url"
+        android:id="@+id/change_url"
-		android:checkable="true"
+        android:checkable="true"
-		android:icon="@drawable/ic_change"
+        android:icon="@drawable/ic_change"
-		android:title="@string/menu_navigation_drawer_change_url" />
+        android:title="@string/menu_navigation_drawer_change_url" />
 
-	<item
+    <item
-		android:id="@+id/login"
+        android:id="@+id/login"
-		android:checkable="true"
+        android:checkable="true"
-		android:icon="@drawable/ic_login"
+        android:icon="@drawable/ic_login"
-		android:title="@string/menu_navigation_drawer_login" />
+        android:title="@string/menu_navigation_drawer_login" />
 
-	<item
+    <item
-		android:id="@+id/logout"
+        android:id="@+id/logout"
-		android:icon="@drawable/ic_logout"
+        android:icon="@drawable/ic_logout"
-		android:title="@string/menu_navigation_drawer_logout" />
+        android:title="@string/menu_navigation_drawer_logout" />
+
+    <item
+        android:id="@+id/email_logs"
+        android:icon="@drawable/ic_send"
+        android:title="@string/menu_navigation_drawer_email_logs" />
 
 </menu>

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

@@ -73,4 +73,10 @@
 	<string name="fragment_recipes_favorite_added">Added %1$s to favorites</string>
 	<string name="fragment_recipes_favorite_removed">Removed %1$s from favorites</string>
 	<string name="menu_navigation_drawer_shopping_lists">Shopping lists</string>
+	<string name="menu_navigation_drawer_email_logs">Email logs</string>
+	<string name="activity_main_email_logs_subject">Mealient logs</string>
+	<string name="activity_main_email_logs_confirmation_message">The logs contain sensitive data such as API token, shopping lists, and recipes. API tokens can be revoked using web client. The file can be viewed and edited if you send it to yourself instead.</string>
+	<string name="activity_main_email_logs_confirmation_title">Sending sensitive data</string>
+	<string name="activity_main_email_logs_confirmation_positive">Choose how to send</string>
+	<string name="activity_main_email_logs_confirmation_negative">Cancel</string>
 </resources>

app/src/main/res/xml/file_provider_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <files-path
+        path="."
+        name="log.txt" />
+</paths>

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

@@ -16,6 +16,7 @@ import io.mockk.coVerify
 import io.mockk.confirmVerified
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
+import io.mockk.impl.annotations.RelaxedMockK
 import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.toList
 import kotlinx.coroutines.test.runTest
@@ -33,12 +34,21 @@ class AuthRepoImplTest : BaseUnitTest() {
     @MockK(relaxUnitFun = true)
     lateinit var signOutHandler: SignOutHandler
 
+    @RelaxedMockK
+    lateinit var credentialsLogRedactor: CredentialsLogRedactor
+
     lateinit var subject: AuthRepo
 
     @Before
     override fun setUp() {
         super.setUp()
-        subject = AuthRepoImpl(storage, dataSource, logger, signOutHandler)
+        subject = AuthRepoImpl(
+            authStorage = storage,
+            authDataSource = dataSource,
+            logger = logger,
+            signOutHandler = signOutHandler,
+            credentialsLogRedactor = credentialsLogRedactor,
+        )
     }
 
     @Test

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

@@ -3,6 +3,7 @@ package gq.kirmanak.mealient.ui.baseurl
 import com.google.common.truth.Truth.assertThat
 import gq.kirmanak.mealient.data.auth.AuthRepo
 import gq.kirmanak.mealient.data.baseurl.ServerInfoRepo
+import gq.kirmanak.mealient.data.baseurl.impl.BaseUrlLogRedactor
 import gq.kirmanak.mealient.data.recipes.RecipeRepo
 import gq.kirmanak.mealient.datasource.NetworkError
 import gq.kirmanak.mealient.datasource.TrustedCertificatesStore
@@ -13,8 +14,11 @@ import io.mockk.coEvery
 import io.mockk.coVerify
 import io.mockk.coVerifyOrder
 import io.mockk.impl.annotations.MockK
+import io.mockk.impl.annotations.RelaxedMockK
 import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.test.*
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
 import org.junit.Before
 import org.junit.Test
 import java.io.IOException
@@ -35,6 +39,9 @@ class BaseURLViewModelTest : BaseUnitTest() {
     @MockK(relaxUnitFun = true)
     lateinit var trustedCertificatesStore: TrustedCertificatesStore
 
+    @RelaxedMockK
+    lateinit var baseUrlLogRedactor: BaseUrlLogRedactor
+
     lateinit var subject: BaseURLViewModel
 
     @Before
@@ -46,6 +53,7 @@ class BaseURLViewModelTest : BaseUnitTest() {
             recipeRepo = recipeRepo,
             logger = logger,
             trustedCertificatesStore = trustedCertificatesStore,
+            baseUrlLogRedactor = baseUrlLogRedactor,
         )
     }
 

datasource/build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
 
 android {
     defaultConfig {
-        buildConfigField("Boolean", "LOG_NETWORK", "false")
+        buildConfigField("Boolean", "LOG_NETWORK", "true")
         consumerProguardFiles("consumer-proguard-rules.pro")
     }
     namespace = "gq.kirmanak.mealient.datasource"
@@ -31,7 +31,7 @@ dependencies {
 
     implementation(platform(libs.okhttp3.bom))
     implementation(libs.okhttp3.okhttp)
-    debugImplementation(libs.okhttp3.loggingInterceptor)
+    implementation(libs.okhttp3.loggingInterceptor)
 
     implementation(libs.ktor.core)
     implementation(libs.ktor.auth)

datasource/src/debug/kotlin/gq/kirmanak/mealient/DebugModule.kt

@@ -10,25 +10,12 @@ import dagger.hilt.InstallIn
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
 import dagger.multibindings.IntoSet
-import gq.kirmanak.mealient.datasource.BuildConfig
-import gq.kirmanak.mealient.logging.Logger
 import okhttp3.Interceptor
-import okhttp3.logging.HttpLoggingInterceptor
 
 @Module
 @InstallIn(SingletonComponent::class)
 internal object DebugModule {
 
-    @Provides
-    @IntoSet
-    fun provideLoggingInterceptor(logger: Logger): Interceptor {
-        val interceptor = HttpLoggingInterceptor { message -> logger.v(tag = "OkHttp") { message } }
-        interceptor.level = when {
-            BuildConfig.LOG_NETWORK -> HttpLoggingInterceptor.Level.BODY
-            else -> HttpLoggingInterceptor.Level.BASIC
-        }
-        return interceptor
-    }
 
     @Provides
     @IntoSet

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/DataSourceModule.kt

@@ -5,13 +5,17 @@ import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import dagger.multibindings.IntoSet
 import gq.kirmanak.mealient.datasource.impl.MealieDataSourceImpl
 import gq.kirmanak.mealient.datasource.impl.MealieServiceKtor
 import gq.kirmanak.mealient.datasource.impl.NetworkRequestWrapperImpl
 import gq.kirmanak.mealient.datasource.impl.OkHttpBuilderImpl
 import gq.kirmanak.mealient.datasource.impl.TrustedCertificatesStoreImpl
+import gq.kirmanak.mealient.logging.Logger
 import kotlinx.serialization.json.Json
+import okhttp3.Interceptor
 import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
 import javax.inject.Singleton
 
 @Module
@@ -33,6 +37,17 @@ internal interface DataSourceModule {
         fun provideOkHttp(okHttpBuilder: OkHttpBuilderImpl): OkHttpClient =
             okHttpBuilder.buildOkHttp()
 
+        @Provides
+        @IntoSet
+        fun provideLoggingInterceptor(logger: Logger): Interceptor {
+            val interceptor =
+                HttpLoggingInterceptor { message -> logger.v(tag = "OkHttp") { message } }
+            interceptor.level = when {
+                BuildConfig.LOG_NETWORK -> HttpLoggingInterceptor.Level.BODY
+                else -> HttpLoggingInterceptor.Level.BASIC
+            }
+            return interceptor
+        }
     }
 
     @Binds

datasource/src/release/java/gq/kirmanak/mealient/ReleaseModule.kt

@@ -1,19 +0,0 @@
-package gq.kirmanak.mealient
-
-import dagger.Module
-import dagger.Provides
-import dagger.hilt.InstallIn
-import dagger.hilt.components.SingletonComponent
-import okhttp3.Interceptor
-import javax.inject.Singleton
-
-@Module
-@InstallIn(SingletonComponent::class)
-object ReleaseModule {
-
-  // Release version of the application doesn't have any interceptors but this Set
-  // is required by Dagger, so an empty Set is provided here
-  // Use @JvmSuppressWildcards because otherwise dagger can't inject it (https://stackoverflow.com/a/43149382)
-  @Provides
-  fun provideInterceptors(): Set<@JvmSuppressWildcards Interceptor> = emptySet()
-}

logging/src/main/kotlin/gq/kirmanak/mealient/logging/AppenderModule.kt

@@ -8,12 +8,13 @@ import dagger.multibindings.IntoSet
 
 @Module
 @InstallIn(SingletonComponent::class)
-interface LoggingModule {
+internal interface AppenderModule {
-
-    @Binds
-    fun bindLogger(loggerImpl: LoggerImpl): Logger
 
     @Binds
     @IntoSet
     fun bindLogcatAppender(logcatAppender: LogcatAppender): Appender
+
+    @Binds
+    @IntoSet
+    fun bindFileAppender(fileAppender: FileAppender): Appender
 }

logging/src/main/kotlin/gq/kirmanak/mealient/logging/FileAppender.kt

@@ -0,0 +1,109 @@
+package gq.kirmanak.mealient.logging
+
+import android.app.Application
+import gq.kirmanak.mealient.architecture.configuration.AppDispatchers
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.launch
+import java.io.BufferedWriter
+import java.io.FileWriter
+import java.io.IOException
+import java.io.Writer
+import java.time.Instant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import javax.inject.Inject
+import javax.inject.Singleton
+
+private const val MAX_LOG_FILE_SIZE = 1024 * 1024 * 10L // 10 MB
+
+@Singleton
+internal class FileAppender @Inject constructor(
+    private val application: Application,
+    dispatchers: AppDispatchers,
+) : Appender {
+
+    private data class LogInfo(
+        val logTime: Instant,
+        val logLevel: LogLevel,
+        val tag: String,
+        val message: String,
+    )
+
+    private val fileWriter: Writer? = createFileWriter()
+
+    private val logChannel = Channel<LogInfo>(
+        capacity = 100,
+        onBufferOverflow = BufferOverflow.DROP_LATEST,
+    )
+
+    private val coroutineScope = CoroutineScope(dispatchers.io + SupervisorJob())
+
+    private val dateTimeFormatter =
+        DateTimeFormatter.ISO_LOCAL_DATE_TIME.withZone(ZoneId.systemDefault())
+
+    init {
+        startLogWriter()
+    }
+
+    private fun createFileWriter(): Writer? {
+        val file = application.getLogFile()
+        if (file.length() > MAX_LOG_FILE_SIZE) {
+            file.delete()
+        }
+
+        val writer = try {
+            FileWriter(file, /* append = */ true)
+        } catch (e: IOException) {
+            return null
+        }
+
+        return BufferedWriter(writer)
+    }
+
+    private fun startLogWriter() {
+        if (fileWriter == null) {
+            return
+        }
+
+        coroutineScope.launch {
+            for (logInfo in logChannel) {
+                val time = dateTimeFormatter.format(logInfo.logTime)
+                val level = logInfo.logLevel.name.first()
+                logInfo.message.lines().forEach {
+                    try {
+                        fileWriter.appendLine("$time $level ${logInfo.tag}: $it")
+                    } catch (e: IOException) {
+                        // Ignore
+                    }
+                }
+            }
+        }
+    }
+
+    override fun isLoggable(logLevel: LogLevel): Boolean = true
+
+    override fun isLoggable(logLevel: LogLevel, tag: String): Boolean = true
+
+    override fun log(logLevel: LogLevel, tag: String, message: String) {
+        val logInfo = LogInfo(
+            logTime = Instant.now(),
+            logLevel = logLevel,
+            tag = tag,
+            message = message,
+        )
+        logChannel.trySend(logInfo)
+    }
+
+    protected fun finalize() {
+        coroutineScope.cancel("Object is being destroyed")
+        try {
+            fileWriter?.close()
+        } catch (e: IOException) {
+            // Ignore
+        }
+    }
+}

logging/src/main/kotlin/gq/kirmanak/mealient/logging/LogRedactor.kt

@@ -0,0 +1,6 @@
+package gq.kirmanak.mealient.logging
+
+interface LogRedactor {
+
+    fun redact(message: String): String
+}

logging/src/main/kotlin/gq/kirmanak/mealient/logging/LogcatAppender.kt

@@ -4,7 +4,7 @@ import android.util.Log
 import gq.kirmanak.mealient.architecture.configuration.BuildConfiguration
 import javax.inject.Inject
 
-class LogcatAppender @Inject constructor(
+internal class LogcatAppender @Inject constructor(
     private val buildConfiguration: BuildConfiguration,
 ) : Appender {
 

logging/src/main/kotlin/gq/kirmanak/mealient/logging/Logger.kt

@@ -1,7 +1,12 @@
 package gq.kirmanak.mealient.logging
 
+import android.content.Context
+import java.io.File
+
 typealias MessageSupplier = () -> String
 
+private const val LOG_FILE_NAME = "log.txt"
+
 interface Logger {
 
     fun v(throwable: Throwable? = null, tag: String? = null, messageSupplier: MessageSupplier)
@@ -13,4 +18,8 @@ interface Logger {
     fun w(throwable: Throwable? = null, tag: String? = null, messageSupplier: MessageSupplier)
 
     fun e(throwable: Throwable? = null, tag: String? = null, messageSupplier: MessageSupplier)
+}
+
+fun Context.getLogFile(): File {
+    return File(filesDir, LOG_FILE_NAME)
 }

logging/src/main/kotlin/gq/kirmanak/mealient/logging/LoggerImpl.kt

@@ -6,6 +6,7 @@ import javax.inject.Inject
 
 class LoggerImpl @Inject constructor(
     private val appenders: Set<@JvmSuppressWildcards Appender>,
+    private val redactors: Set<@JvmSuppressWildcards LogRedactor>,
 ) : Logger {
 
     override fun v(throwable: Throwable?, tag: String?, messageSupplier: MessageSupplier) {
@@ -45,12 +46,23 @@ class LoggerImpl @Inject constructor(
 
             if (appender.isLoggable(logLevel, logTag).not()) continue
 
-            message = message ?: (messageSupplier() + createStackTrace(t))
+            message = message ?: buildLogMessage(messageSupplier, t)
 
             appender.log(logLevel, logTag, message)
         }
     }
 
+    private fun buildLogMessage(
+        messageSupplier: MessageSupplier,
+        t: Throwable?
+    ): String {
+        var message = messageSupplier() + createStackTrace(t)
+        for (redactor in redactors) {
+            message = redactor.redact(message)
+        }
+        return message
+    }
+
     private fun createStackTrace(throwable: Throwable?): String =
         throwable?.let { Log.getStackTraceString(it) }
             ?.takeUnless { it.isBlank() }

logging/src/main/kotlin/gq/kirmanak/mealient/logging/LoggerModule.kt

@@ -0,0 +1,15 @@
+package gq.kirmanak.mealient.logging
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+interface LoggerModule {
+
+    @Binds
+    fun bindLogger(loggerImpl: LoggerImpl): Logger
+
+}

testing/src/main/kotlin/gq/kirmanak/mealient/test/FakeLoggerModule.kt

@@ -5,14 +5,14 @@ import dagger.Module
 import dagger.hilt.components.SingletonComponent
 import dagger.hilt.testing.TestInstallIn
 import gq.kirmanak.mealient.logging.Logger
-import gq.kirmanak.mealient.logging.LoggingModule
+import gq.kirmanak.mealient.logging.LoggerModule
 
 @Module
 @TestInstallIn(
     components = [SingletonComponent::class],
-    replaces = [LoggingModule::class]
+    replaces = [LoggerModule::class]
 )
-interface FakeLoggingModule {
+interface FakeLoggerModule {
 
     @Binds
     fun bindFakeLogger(impl: FakeLogger): Logger