android: disable app data backup competely (#2907)

apps/multiplatform/android/src/main/AndroidManifest.xml

@@ -24,9 +24,8 @@
 
   <application
       android:name="SimplexApp"
-      android:allowBackup="true"
-      android:fullBackupOnly="true"
-      android:backupAgent="BackupAgent"
+      android:allowBackup="false"
+      android:fullBackupOnly="false"
       android:icon="@mipmap/icon"
       android:label="${app_name}"
       android:extractNativeLibs="${extract_native_libs}"

apps/multiplatform/android/src/main/java/chat/simplex/app/BackupAgent.kt

@@ -1,18 +0,0 @@
-package chat.simplex.app
-
-import android.app.backup.BackupAgentHelper
-import android.app.backup.FullBackupDataOutput
-import android.content.Context
-import chat.simplex.app.model.AppPreferences
-import chat.simplex.app.model.AppPreferences.Companion.SHARED_PREFS_PRIVACY_FULL_BACKUP
-
-class BackupAgent: BackupAgentHelper() {
-  override fun onFullBackup(data: FullBackupDataOutput?) {
-    if (applicationContext
-        .getSharedPreferences(AppPreferences.SHARED_PREFS_ID, Context.MODE_PRIVATE)
-        .getBoolean(SHARED_PREFS_PRIVACY_FULL_BACKUP, true)
-    ) {
-      super.onFullBackup(data)
-    }
-  }
-}

apps/multiplatform/android/src/main/java/chat/simplex/app/model/SimpleXAPI.kt

@@ -94,7 +94,6 @@ class AppPreferences {
     set = fun(mode: SimplexLinkMode) { _simplexLinkMode.set(mode.name) }
   )
   val privacyDeliveryReceiptsSet = mkBoolPreference(SHARED_PREFS_PRIVACY_DELIVERY_RECEIPTS_SET, false)
-  val privacyFullBackup = mkBoolPreference(SHARED_PREFS_PRIVACY_FULL_BACKUP, false)
   val experimentalCalls = mkBoolPreference(SHARED_PREFS_EXPERIMENTAL_CALLS, false)
   val showUnreadAndFavorites = mkBoolPreference(SHARED_PREFS_SHOW_UNREAD_AND_FAVORITES, false)
   val chatArchiveName = mkStrPreference(SHARED_PREFS_CHAT_ARCHIVE_NAME, null)

apps/multiplatform/android/src/main/java/chat/simplex/app/views/database/DatabaseView.kt

@@ -83,7 +83,6 @@ fun DatabaseView(
       chatArchiveName,
       chatArchiveTime,
       chatLastStart,
-      m.controller.appPrefs.privacyFullBackup,
       appFilesCountAndSize,
       chatItemTTL,
       m.currentUser.value,
@@ -133,7 +132,6 @@ fun DatabaseLayout(
   chatArchiveName: MutableState<String?>,
   chatArchiveTime: MutableState<Instant?>,
   chatLastStart: MutableState<Instant?>,
-  privacyFullBackup: SharedPreference<Boolean>,
   appFilesCountAndSize: MutableState<Pair<Int, Long>>,
   chatItemTTL: MutableState<ChatItemTTL>,
   currentUser: User?,
@@ -173,6 +171,13 @@ fun DatabaseLayout(
     SectionView(stringResource(MR.strings.run_chat_section)) {
       RunChatSetting(runChat, stopped, startChat, stopChatAlert)
     }
+    SectionTextFooter(
+      if (stopped) {
+        stringResource(MR.strings.you_must_use_the_most_recent_version_of_database)
+      } else {
+        stringResource(MR.strings.stop_chat_to_enable_database_actions)
+      }
+    )
     SectionDividerSpaced()
 
     SectionView(stringResource(MR.strings.chat_database_section)) {
@@ -185,8 +190,6 @@ fun DatabaseLayout(
         iconColor = if (unencrypted) WarningOrange else MaterialTheme.colors.secondary,
         disabled = operationsDisabled
       )
-      AppDataBackupPreference(privacyFullBackup, initialRandomDBPassphrase)
-      SectionDividerSpaced(maxBottomPadding = false)
       SettingsActionItem(
         painterResource(MR.images.ic_ios_share),
         stringResource(MR.strings.export_database),
@@ -230,13 +233,6 @@ fun DatabaseLayout(
         disabled = operationsDisabled
       )
     }
-    SectionTextFooter(
-      if (stopped) {
-        stringResource(MR.strings.you_must_use_the_most_recent_version_of_database)
-      } else {
-        stringResource(MR.strings.stop_chat_to_enable_database_actions)
-      }
-    )
     SectionDividerSpaced(maxTopPadding = true)
 
     SectionView(stringResource(MR.strings.files_and_media_section).uppercase()) {
@@ -263,23 +259,6 @@ fun DatabaseLayout(
   }
 }
 
-@Composable
-private fun AppDataBackupPreference(privacyFullBackup: SharedPreference<Boolean>, initialRandomDBPassphrase: SharedPreference<Boolean>) {
-  SettingsPreferenceItem(
-    painterResource(MR.images.ic_backup),
-    iconColor = MaterialTheme.colors.secondary,
-    pref = privacyFullBackup,
-    text = stringResource(MR.strings.full_backup)
-  ) {
-    if (initialRandomDBPassphrase.get()) {
-      exportProhibitedAlert()
-      privacyFullBackup.set(false)
-    } else {
-      privacyFullBackup.set(it)
-    }
-  }
-}
-
 private fun setChatItemTTLAlert(
   m: ChatModel, selectedChatItemTTL: MutableState<ChatItemTTL>,
   progressIndicator: MutableState<Boolean>,
@@ -723,7 +702,6 @@ fun PreviewDatabaseLayout() {
       chatArchiveName = remember { mutableStateOf("dummy_archive") },
       chatArchiveTime = remember { mutableStateOf(Clock.System.now()) },
       chatLastStart = remember { mutableStateOf(Clock.System.now()) },
-      privacyFullBackup = SharedPreference({ true }, {}),
       appFilesCountAndSize = remember { mutableStateOf(0 to 0L) },
       chatItemTTL = remember { mutableStateOf(ChatItemTTL.None) },
       currentUser = User.sampleData,