Fixed empty message handling

app/js/controllers.js

@@ -701,7 +701,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       for (i = 0; i < len; i++) {
         dialog = indexesToDialogs[indexes[i]];
         $scope.dialogs.unshift(
-          AppMessagesManager.wrapForDialog(dialog.top_message, dialog.unread_count)
+          AppMessagesManager.wrapForDialog(dialog.top_message, dialog)
         );
       }
 
@@ -879,7 +879,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
 
         if (dialogsResult.dialogs.length) {
           angular.forEach(dialogsResult.dialogs, function (dialog) {
-            var wrappedDialog = AppMessagesManager.wrapForDialog(dialog.top_message, dialog.unread_count);
+            var wrappedDialog = AppMessagesManager.wrapForDialog(dialog.top_message, dialog);
             if (!searchMessages) {
               peersInDialogs[dialog.peerID] = true;
             }
@@ -930,7 +930,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
           var dialogsList = searchMessages ? $scope.foundMessages : $scope.dialogs;
 
           angular.forEach(dialogsResult.dialogs, function (dialog) {
-            var wrappedDialog = AppMessagesManager.wrapForDialog(dialog.top_message, dialog.unread_count);
+            var wrappedDialog = AppMessagesManager.wrapForDialog(dialog.top_message, dialog);
             if (!searchMessages) {
               peersInDialogs[dialog.peerID] = true;
             }

app/js/messages_manager.js

@@ -390,7 +390,7 @@ angular.module('myApp.services')
   var fullMsgIDModulus = 4294967296;
 
   function getFullMessageID (msgID, channelID) {
-    if (!channelID || msgID < 0) {
+    if (!channelID || msgID <= 0) {
       return msgID;
     }
     msgID = getMessageLocalID(msgID);
@@ -1675,8 +1675,9 @@ angular.module('myApp.services')
     return message.from_id;
   }
 
-  function wrapForDialog (msgID, unreadCount) {
+  function wrapForDialog (msgID, dialog) {
-    var useCache = unreadCount != -1;
+    var useCache = dialog === undefined;
+    var unreadCount = dialog && dialog.unread_count;
 
     if (useCache && messagesForDialogs[msgID] !== undefined) {
       return messagesForDialogs[msgID];
@@ -1685,8 +1686,13 @@ angular.module('myApp.services')
     var message = angular.copy(messagesStorage[msgID]);
 
     if (!message || !message.to_id) {
+      if (dialog && dialog.peerID) {
+        message = {_: 'message', to_id: AppPeersManager.getOutputPeer(dialog.peerID), deleted: true, date: tsNow(true)};
+        message.deleted = true;
+      } else {
         return message;
       }
+    }
 
     message.peerID = getMessagePeer(message);
     message.peerData = AppPeersManager.getPeer(message.peerID);