Update folder sync time

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

@@ -521,7 +521,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                 db.folder().setFolderError(browsable.id, null);
 
                 int count = MessageHelper.getMessageCount(state.ifolder);
-                db.folder().setFolderTotal(browsable.id, count < 0 ? null : count);
+                db.folder().setFolderTotal(browsable.id, count < 0 ? null : count, new Date().getTime());
 
                 if (criteria == null) {
                     boolean filter_seen = prefs.getBoolean(FragmentMessages.getFilter(context, "seen", viewType, browsable.type), false);

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

@@ -1505,7 +1505,7 @@ class Core {
             expunge(context, ifolder, deleted);
         } else {
             int count = MessageHelper.getMessageCount(ifolder);
-            db.folder().setFolderTotal(folder.id, count < 0 ? null : count);
+            db.folder().setFolderTotal(folder.id, count < 0 ? null : count, new Date().getTime());
         }
 
         // Fetch appended/copied when needed
@@ -1703,7 +1703,7 @@ class Core {
             db.message().deleteMessage(folder.id, uid);
         } finally {
             int count = MessageHelper.getMessageCount(ifolder);
-            db.folder().setFolderTotal(folder.id, count < 0 ? null : count);
+            db.folder().setFolderTotal(folder.id, count < 0 ? null : count, new Date().getTime());
         }
     }
 
@@ -1814,7 +1814,7 @@ class Core {
             }
         } finally {
             int count = MessageHelper.getMessageCount(ifolder);
-            db.folder().setFolderTotal(folder.id, count < 0 ? null : count);
+            db.folder().setFolderTotal(folder.id, count < 0 ? null : count, new Date().getTime());
         }
     }
 

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

@@ -273,6 +273,11 @@ public interface DaoFolder {
     @Query("UPDATE folder SET total = :total WHERE id = :id AND NOT (total IS :total)")
     int setFolderTotal(long id, Integer total);
 
+    @Query("UPDATE folder SET total = :total, last_sync = :last_sync" +
+            " WHERE id = :id" +
+            " AND NOT (total IS :total AND last_sync IS :last_sync)")
+    int setFolderTotal(long id, Integer total, Long last_sync);
+
     @Query("UPDATE folder SET error = :error WHERE id = :id AND NOT (error IS :error)")
     int setFolderError(long id, String error);
 

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

@@ -372,6 +372,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
     private Boolean lastRefreshing;
     private Boolean lastFolderErrors;
     private Boolean lastAccountErrors;
+    private Long lastSyncTime;
 
     final private Map<String, String> kv = new HashMap<>();
     final private Map<String, List<Long>> values = new HashMap<>();
@@ -5703,10 +5704,15 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             }
         }
 
+        Long syncTime = null;
+        if (viewType == AdapterMessage.ViewType.FOLDER && folders.size() == 1)
+            syncTime = folders.get(0).last_sync;
+
         if (Objects.equals(lastUnseen, unseen) &&
                 Objects.equals(lastRefreshing, refreshing) &&
                 Objects.equals(lastFolderErrors, folderErrors) &&
-                Objects.equals(lastAccountErrors, accountErrors)) {
+                Objects.equals(lastAccountErrors, accountErrors) &&
+                Objects.equals(lastSyncTime, syncTime)) {
             Log.i("Folder state unchanged");
             return;
         }
@@ -5715,6 +5721,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         lastRefreshing = refreshing;
         lastFolderErrors = folderErrors;
         lastAccountErrors = accountErrors;
+        lastSyncTime = syncTime;
 
         // Get name
         String name;
@@ -5740,14 +5747,9 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             name = getString(R.string.title_name_count, name, NF.format(unseen));
         setSubtitle(name);
 
-        if (viewType == AdapterMessage.ViewType.FOLDER &&
-                folders.size() == 1 &&
-                folders.get(0).last_sync != null) {
-            tvLastSync.setText(DateUtils.getRelativeTimeSpanString(context,
-                    folders.get(0).last_sync, true));
-            grpLastSync.setVisibility(View.VISIBLE);
-        } else
-            grpLastSync.setVisibility(View.GONE);
+        tvLastSync.setText(syncTime == null ? null
+                : DateUtils.getRelativeTimeSpanString(context, syncTime, true));
+        grpLastSync.setVisibility(syncTime == null ? View.GONE : View.VISIBLE);
 
         fabError.setTag(accountErrors);
         if (folderErrors || accountErrors)