Update to support delete note

lib/realtime.js

@@ -796,6 +796,35 @@ function connection(socket) {
         }
     });
 
+    // delete a note
+    socket.on('delete', function () {
+        //need login to do more actions
+        if (socket.request.user && socket.request.user.logged_in) {
+            var noteId = socket.noteId;
+            if (!noteId || !notes[noteId]) return;
+            var note = notes[noteId];
+            //Only owner can delete note
+            if (note.owner && note.owner == socket.request.user.id) {
+                models.Note.destroy({
+                    where: {
+                        id: noteId
+                    }
+                }).then(function (count) {
+                    if (!count) return;
+                    for (var i = 0, l = note.socks.length; i < l; i++) {
+                        var sock = note.socks[i];
+                        if (typeof sock !== 'undefined' && sock) {
+                            sock.emit('delete');
+                            return sock.disconnect(true);
+                        }
+                    }
+                }).catch(function (err) {
+                    return logger.error('delete note failed: ' + err);
+                });
+            }
+        }
+    });
+
     //reveiced when user logout or changed
     socket.on('user changed', function () {
         logger.info('user changed');