Fix error handling for lock/unlock

public/js/vroom.js

@@ -580,10 +580,10 @@ function initVroom(room) {
         room: roomName
       },
       error: function(data) {
-        var msg = (data && data.msg) ? data.msg : locale.ERROR_OCCURED;
-        $.notify(msg, 'error');
+        $.notify(locale.ERROR_OCCURED, 'error');
       },
       success: function(data) {
+        if (data.status == 'success'){
           $.notify(data.msg, 'info');
           if (action === 'lock'){
             $("#lockLabel").addClass('btn-danger');
@@ -594,6 +594,10 @@ function initVroom(room) {
             webrtc.sendToAll('room_unlocked', {});
           }
         }
+        else{
+          $.notify(data.msg, 'error');
+        }
+      }  
     });
   });
 

public/vroom.pl

@@ -518,13 +518,14 @@ post '/action' => sub {
       return $self->render(
                json => {
                  msg    => $self->l('ERROR_OCCURED'),
+                 status => 'error'
                },
-               status   => '500'
              );
     }
     return $self->render(
              json => {
                msg    => $success,
+               status => 'success'
              }
            );
   }