adding notifications on connection issues, again

sails/src/api/controllers/StudentController.js

@@ -1435,15 +1435,16 @@ module.exports = {
     var action = req.param('action');
     var attributes = req.param('attributes');
     attributes.ui = attributes.ui ? attributes.ui : 'PCB';
+    var room = sails.hooks.rooms.student(attributes.id_stu);
 
     if (req.isSocket) {
       sails.hooks.rooms.subscribeToRoom(
-        sails.hooks.rooms.student(attributes.id_stu),
+        room,
         req.socket,
         attributes.ui
       );
     }
-    res.ok({msg: "Subscribed to student "});
+    res.ok(sails.hooks.rooms.getUICount(room));
   },
 
   //

sails/src/api/hooks/rooms.js

@@ -15,12 +15,11 @@ module.exports = function roomsHook (sails) {
   return {
 
     /**************************************************************************
-    * Notifies to all the room's subscribers about the number of different
-    * connections by UI:
+    * Counts the number of UIs connected to a room:
     *   pdb_count (number of connections to the given room from Pictogram Web)
     *   pcb_count (number of connections to the given room from Pictogram Communicator/Supervisor)
     */
-    notifyRoom: function(room) {
+    getUICount: function (room) {
       // Let's count number of connections per room and per UI
       var counter = {'PCB': 0, 'PDB': 0};
       //console.log('notifyRoom (' + room + ')---->\n' + JSON.stringify(sockets) + '\n' + JSON.stringify(rooms));
@@ -34,22 +33,29 @@ module.exports = function roomsHook (sails) {
         (err) => {
           if (err)
             sails.debug.log("Error when notifying room " + JSON.stringify(err));
-          else {
-            // Broadcast data to room's peers
-            sails.hooks.events.broadcastEvent(
-              room,
-              sails.hooks.events.roomSubscribersChange({
-                'room': room,
-                'pdb_count': counter['PDB'],
-                'pcb_count': counter['PCB']
-              })
-            );
-          }
+          else
+            return ({
+              'room': room,
+              'pdb_count': counter['PDB'],
+              'pcb_count': counter['PCB']
+            });
         }
       );
     },
 
     /**************************************************************************
+    * Notifies to all the room's subscribers about the number of different
+    * connections by UI
+    */
+    notifyRoom: function(room) {
+      // Broadcast data to room's peers
+      sails.hooks.events.broadcastEvent(
+        room,
+        sails.hooks.events.roomSubscribersChange(sails.hooks.events.getUICount(room));
+      );
+    },
+
+    /**************************************************************************
      * Special function that subscribes a socket to a given room.
      * This creates the connection and logs to debug with this format:
      *