Force sync improvements

app/src/main/java/eu/faircode/email/Core.java

@@ -2279,7 +2279,11 @@ class Core {
         boolean notify_known = prefs.getBoolean("notify_known", false);
         boolean pro = ActivityBilling.isPro(context);
 
-        EntityLog.log(context, account.name + " POP sync type=" + folder.type + " connected=" + (ifolder != null));
+        boolean force = jargs.optBoolean(5, false);
+
+        EntityLog.log(context, account.name + " POP sync type=" + folder.type +
+                " force=" + force +
+                " connected=" + (ifolder != null));
 
         if (!EntityFolder.INBOX.equals(folder.type)) {
             db.folder().setFolderSyncState(folder.id, null);
@@ -2304,7 +2308,8 @@ class Core {
                     : Math.min(imessages.length, account.max_messages));
 
             boolean sync = true;
-            if (imessages.length > 0 && folder.last_sync_count != null &&
+            if (!force &&
+                    imessages.length > 0 && folder.last_sync_count != null &&
                     imessages.length == folder.last_sync_count) {
                 // Check if last message known as new messages indicator
                 MessageHelper helper = new MessageHelper((MimeMessage) imessages[imessages.length - 1], context);

app/src/main/java/eu/faircode/email/FragmentAccounts.java

@@ -374,7 +374,7 @@ public class FragmentAccounts extends FragmentBase {
                         Collections.sort(folders, folders.get(0).getComparator(context));
 
                     for (EntityFolder folder : folders) {
-                        EntityOperation.sync(context, folder.id, true);
+                        EntityOperation.sync(context, folder.id, true, force);
 
                         if (folder.account == null)
                             outbox = true;

app/src/main/java/eu/faircode/email/FragmentFolders.java

@@ -394,7 +394,7 @@ public class FragmentFolders extends FragmentBase {
                         Collections.sort(folders, folders.get(0).getComparator(context));
 
                     for (EntityFolder folder : folders) {
-                        EntityOperation.sync(context, folder.id, true);
+                        EntityOperation.sync(context, folder.id, true, force);
 
                         if (folder.account == null)
                             outbox = true;

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -1580,7 +1580,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                     }
 
                     for (EntityFolder folder : folders) {
-                        EntityOperation.sync(context, folder.id, true);
+                        EntityOperation.sync(context, folder.id, true, force);
 
                         if (folder.account != null) {
                             EntityAccount account = db.account().getAccount(folder.account);

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -1904,8 +1904,15 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                                         } else {
                                             if (folder.poll_count == 0) {
                                                 // Cancel pending sync, for example when the folder is not set to poll
-                                                db.operation().deleteOperation(folder.id, EntityOperation.SYNC);
+                                                List<EntityOperation> ops = db.operation().getOperations(folder.account, EntityOperation.SYNC);
+                                                if (ops.size() == 0)
                                                     EntityOperation.sync(this, folder.id, false);
+                                                else
+                                                    for (EntityOperation op : ops) {
+                                                        db.operation().deleteOperation(op.id);
+                                                        op.id = null;
+                                                        op.id = db.operation().insertOperation(op);
+                                                    }
                                             }
                                             folder.poll_count = (folder.poll_count + 1) % folder.poll_factor;
                                             db.folder().setFolderPollCount(folder.id, folder.poll_count);