android: Ability to delete app files and media (#1072)

* Ability to delete app files and media

* section title, corrections

* remove icon

* change translation

* revert disabled unless stopped

Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>

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

@@ -62,6 +62,7 @@ fun DatabaseView(
       importArchiveAlert(m, context, uri, progressIndicator)
     }
   }
+  val appFilesCountAndSize = remember { mutableStateOf(directoryFileCountAndSize(getAppFilesDirectory(context))) }
   LaunchedEffect(m.chatRunning) {
     runChat.value = m.chatRunning.value ?: true
   }
@@ -78,10 +79,12 @@ fun DatabaseView(
       chatArchiveName,
       chatArchiveTime,
       chatLastStart,
+      appFilesCountAndSize,
       startChat = { startChat(m, runChat, chatLastStart, m.chatDbChanged) },
       stopChatAlert = { stopChatAlert(m, runChat, context) },
       exportArchive = { exportArchive(context, m, progressIndicator, chatArchiveName, chatArchiveTime, chatArchiveFile, saveArchiveLauncher) },
       deleteChatAlert = { deleteChatAlert(m, progressIndicator) },
+      deleteAppFilesAndMedia = { deleteFilesAndMediaAlert(context, appFilesCountAndSize) },
       showSettingsModal
     )
     if (progressIndicator.value) {
@@ -112,10 +115,12 @@ fun DatabaseLayout(
   chatArchiveName: MutableState<String?>,
   chatArchiveTime: MutableState<Instant?>,
   chatLastStart: MutableState<Instant?>,
+  appFilesCountAndSize: MutableState<Pair<Int, Long>>,
   startChat: () -> Unit,
   stopChatAlert: () -> Unit,
   exportArchive: () -> Unit,
   deleteChatAlert: () -> Unit,
+  deleteAppFilesAndMedia: () -> Unit,
   showSettingsModal: (@Composable (ChatModel) -> Unit) -> (() -> Unit)
 ) {
   val stopped = !runChat
@@ -196,6 +201,28 @@ fun DatabaseLayout(
         stringResource(R.string.stop_chat_to_enable_database_actions)
       }
     )
+    SectionSpacer()
+
+    SectionView(stringResource(R.string.files_section)) {
+      val deleteFilesDisabled = operationsDisabled || appFilesCountAndSize.value.first == 0
+      SectionItemView(
+        deleteAppFilesAndMedia,
+        disabled = deleteFilesDisabled
+      ) {
+        Text(
+          stringResource(R.string.delete_files_and_media),
+          color = if (deleteFilesDisabled) HighOrLowlight else Color.Red
+        )
+      }
+    }
+    val (count, size) = appFilesCountAndSize.value
+    SectionTextFooter(
+      if (count == 0) {
+        stringResource(R.string.no_received_app_files)
+      } else {
+        String.format(stringResource(R.string.total_files_count_and_size), count, formatBytes(size))
+      }
+    )
   }
 }
 
@@ -502,6 +529,21 @@ private fun deleteChat(m: ChatModel, progressIndicator: MutableState<Boolean>) {
   }
 }
 
+private fun deleteFilesAndMediaAlert(context: Context, appFilesCountAndSize: MutableState<Pair<Int, Long>>) {
+  AlertManager.shared.showAlertDialog(
+    title = generalGetString(R.string.delete_files_and_media_question),
+    text = generalGetString(R.string.delete_files_and_media_desc),
+    confirmText = generalGetString(R.string.delete_verb),
+    onConfirm = { deleteFiles(appFilesCountAndSize, context) },
+    destructive = true
+  )
+}
+
+private fun deleteFiles(appFilesCountAndSize: MutableState<Pair<Int, Long>>, context: Context) {
+  deleteAppFiles(context)
+  appFilesCountAndSize.value = directoryFileCountAndSize(getAppFilesDirectory(context))
+}
+
 private fun operationEnded(m: ChatModel, progressIndicator: MutableState<Boolean>, alert: () -> Unit) {
   m.chatDbChanged.value = true
   progressIndicator.value = false
@@ -527,10 +569,12 @@ fun PreviewDatabaseLayout() {
       chatArchiveName = remember { mutableStateOf("dummy_archive") },
       chatArchiveTime = remember { mutableStateOf(Clock.System.now()) },
       chatLastStart = remember { mutableStateOf(Clock.System.now()) },
+      appFilesCountAndSize = remember { mutableStateOf(0 to 0L) },
       startChat = {},
       stopChatAlert = {},
       exportArchive = {},
       deleteChatAlert = {},
+      deleteAppFilesAndMedia = {},
       showSettingsModal = { {} }
     )
   }

apps/android/app/src/main/java/chat/simplex/app/views/helpers/Util.kt

@@ -24,8 +24,7 @@ import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.unit.*
 import androidx.core.content.FileProvider
 import androidx.core.text.HtmlCompat
-import chat.simplex.app.BuildConfig
-import chat.simplex.app.SimplexApp
+import chat.simplex.app.*
 import chat.simplex.app.model.CIFile
 import kotlinx.coroutines.*
 import java.io.*
@@ -405,6 +404,31 @@ fun removeFile(context: Context, fileName: String): Boolean {
   return fileDeleted
 }
 
+fun deleteAppFiles(context: Context) {
+  val dir = File(getAppFilesDirectory(context))
+  try {
+    dir.list()?.forEach {
+      removeFile(context, it)
+    }
+  } catch (e: java.lang.Exception) {
+    Log.e(TAG, "Util deleteAppFiles error: ${e.stackTraceToString()}")
+  }
+}
+
+fun directoryFileCountAndSize(dir: String): Pair<Int, Long> { // count, size in bytes
+  var fileCount = 0
+  var bytes = 0L
+  try {
+    File(dir).listFiles()?.forEach {
+      fileCount++
+      bytes += it.length()
+    }
+  } catch (e: java.lang.Exception) {
+    Log.e(TAG, "Util directoryFileCountAndSize error: ${e.stackTraceToString()}")
+  }
+  return fileCount to bytes
+}
+
 fun ByteArray.toBase64String() = Base64.encodeToString(this, Base64.DEFAULT)
 
 fun String.toByteArrayFromBase64() = Base64.decode(this, Base64.DEFAULT)

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

@@ -556,6 +556,12 @@
     <string name="restart_the_app_to_create_a_new_chat_profile">Перезапустите приложение, чтобы создать новый профиль.</string>
     <string name="you_must_use_the_most_recent_version_of_database">Используйте самую последнюю версию архива чата и ТОЛЬКО на одном устройстве, иначе вы можете перестать получать сообщения от некоторых контактов.</string>
     <string name="stop_chat_to_enable_database_actions">Остановите чат, чтобы разблокировать операции с архивом чата.</string>
+    <string name="files_section">ФАЙЛЫ</string>
+    <string name="delete_files_and_media">Удалить файлы и медиа</string>
+    <string name="delete_files_and_media_question">Удалить файлы и медиа?</string>
+    <string name="delete_files_and_media_desc">Это действие нельзя отменить — все полученные и отправленные файлы будут удалены. Изображения останутся в низком разрешении.</string>
+    <string name="no_received_app_files">Нет полученных или отправленных файлов</string>
+    <string name="total_files_count_and_size">%d файл(ов) общим размером %s</string>
 
     <!-- DatabaseEncryptionView.kt -->
     <string name="save_passphrase_in_keychain">Сохранить пароль в Keystore</string>

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

@@ -557,6 +557,12 @@
   <string name="restart_the_app_to_create_a_new_chat_profile">Restart the app to create a new chat profile.</string>
   <string name="you_must_use_the_most_recent_version_of_database">You must use the most recent version of your chat database on one device ONLY, otherwise you may stop receiving the messages from some contacts.</string>
   <string name="stop_chat_to_enable_database_actions">Stop chat to enable database actions.</string>
+  <string name="files_section">FILES</string>
+  <string name="delete_files_and_media">Delete files \&amp; media</string>
+  <string name="delete_files_and_media_question">Delete files and media?</string>
+  <string name="delete_files_and_media_desc">This action cannot be undone - all received and sent files and media will be deleted. Low resolution pictures will remain.</string>
+  <string name="no_received_app_files">No received or sent files</string>
+  <string name="total_files_count_and_size">%d file(s) with total size of %s</string>
 
   <!-- DatabaseEncryptionView.kt -->
   <string name="save_passphrase_in_keychain">Save passphrase in Keystore</string>