add error handling and media purge

lib/main.dart

@@ -1,4 +1,3 @@
-import 'dart:isolate';
 import 'package:camera/camera.dart';
 import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
@@ -46,10 +45,8 @@ void main() async {
   await twonlyDB.messagesDao.handleMediaFilesOlderThan7Days();
 
   // purge media files in the background
-  Isolate.run(() {
   purgeReceivedMediaFiles();
   purgeSendMediaFiles();
-  });
 
   await initMediaUploader();
 

lib/src/services/api/media_received.dart

@@ -15,6 +15,7 @@ import 'package:cryptography_plus/cryptography_plus.dart';
 import 'package:twonly/src/services/api/utils.dart';
 import 'package:twonly/src/utils/log.dart';
 import 'package:twonly/src/utils/storage.dart';
+import 'package:twonly/src/views/camera/share_image_editor_view.dart';
 
 Map<int, DateTime> downloadStartedForMediaReceived = {};
 
@@ -311,7 +312,16 @@ Future<void> purgeMediaFiles(Directory directory) async {
             bool canBeDeleted = true;
 
             for (final message in messages) {
-              if ((message.openedAt == null && !message.errorWhileSending)) {
+              try {
+                MediaMessageContent content = MediaMessageContent.fromJson(
+                  jsonDecode(message.contentJson!),
+                );
+
+                DateTime oneDayAgo = DateTime.now().subtract(Duration(days: 1));
+
+                if (((message.openedAt == null ||
+                        oneDayAgo.isBefore(message.openedAt!)) &&
+                    !message.errorWhileSending)) {
                   canBeDeleted = false;
                 } else if (message.mediaStored) {
                   if (!file.path.contains(".original.") &&
@@ -319,6 +329,18 @@ Future<void> purgeMediaFiles(Directory directory) async {
                     canBeDeleted = false;
                   }
                 }
+                if (message.acknowledgeByServer) {
+                  // preserve images which can be stored by the other person...
+                  if (content.maxShowTime != gMediaShowInfinite) {
+                    canBeDeleted = true;
+                  }
+                  // encrypted or upload data can be removed when acknowledgedByServer
+                  if (file.path.contains(".upload") ||
+                      file.path.contains(".encrypted")) {
+                    canBeDeleted = true;
+                  }
+                }
+              } catch (e) {}
             }
             if (canBeDeleted) {
               Log.info("purged media file ${file.path} ");

lib/src/services/api/media_send.dart

@@ -56,18 +56,25 @@ Future initMediaUploader() async {
   FileDownloader().updates.listen((update) async {
     switch (update) {
       case TaskStatusUpdate():
-        if (update.status == TaskStatus.complete) {
+        bool failed = false;
         int mediaUploadId = int.parse(update.task.taskId);
         MediaUpload? media = await twonlyDB.mediaUploadsDao
             .getMediaUploadById(mediaUploadId)
             .getSingleOrNull();
         if (media == null) {
           Log.error(
-                "Got an upload task but no upload media in the mediaupload atabase");
+            "Got an upload task but no upload media in the media upload database",
+          );
           return;
         }
+
+        if (update.status == TaskStatus.failed ||
+            update.status == TaskStatus.canceled) {
+          Log.error("Upload failed: ${update.status}");
+          failed = true;
+        } else if (update.status == TaskStatus.complete) {
           if (update.responseStatusCode == 200) {
-            Log.info("Upload was success!");
+            Log.info("Upload of $mediaUploadId success!");
 
             await twonlyDB.mediaUploadsDao.updateMediaUpload(
               mediaUploadId,
@@ -89,6 +96,15 @@ Future initMediaUploader() async {
           } else if (update.responseStatusCode != null) {
             if (update.responseStatusCode! >= 400 &&
                 update.responseStatusCode! < 500) {
+              failed = true;
+            }
+            Log.error(
+              "Got error while uploading: ${update.responseStatusCode}",
+            );
+          }
+        }
+
+        if (failed) {
           for (final messageId in media.messageIds!) {
             await twonlyDB.messagesDao.updateMessageByMessageId(
               messageId,
@@ -99,10 +115,6 @@ Future initMediaUploader() async {
             );
           }
         }
-            Log.error(
-                "Got error while uploading: ${update.responseStatusCode}");
-          }
-        }
 
         print('Status update for ${update.task} with status ${update.status}');
       case TaskProgressUpdate():
@@ -117,6 +129,7 @@ Future initMediaUploader() async {
     (Config.bypassTLSCertificateValidation, kDebugMode),
   ]);
 
+  if (kDebugMode) {
     FileDownloader().configureNotification(
       running: TaskNotification(
         'Uploading',
@@ -125,6 +138,7 @@ Future initMediaUploader() async {
       complete: null,
       progressBar: true,
     );
+  }
 }
 
 /// States:

lib/src/views/chats/media_viewer.view.dart

@@ -260,7 +260,7 @@ class _MediaViewerViewState extends State<MediaViewerView> {
     }
 
     if (!content.isVideo) {
-      if (content.maxShowTime != 999999) {
+      if (content.maxShowTime != gMediaShowInfinite) {
         canBeSeenUntil = DateTime.now().add(
           Duration(seconds: content.maxShowTime),
         );