Return task object including fault details in case of fault. Return reason for connection request failure.

lib/api-functions.coffee

@@ -130,15 +130,19 @@ connectionRequest = (deviceId, callback) ->
 
 watchTask = (taskId, timeout, callback) ->
   setTimeout( () ->
-    db.tasksCollection.findOne({_id : taskId}, {'_id' : 1}, (err, task) ->
+    db.tasksCollection.findOne({_id : taskId}, {'_id' : 1, 'fault' : 1}, (err, task) ->
+      return callback(err) if err
+
       if task
         timeout -= 500
-        if timeout < 0
-          callback(new Error('Timeout'))
+        if task.fault?
+          callback(null, 'fault')
+        else if timeout <= 0
+          callback(null, 'timeout')
         else
           watchTask(taskId, timeout, callback)
       else
-        callback(err)
+        callback(null, 'completed')
     )
   , 500)
 

lib/nbi.coffee

@@ -200,16 +200,31 @@ listener = (request, response) ->
               if urlParts.query.connection_request?
                 apiFunctions.connectionRequest(deviceId, (err) ->
                   if err
-                    response.writeHead(202, {'Content-Type' : 'application/json'})
+                    response.writeHead(202, err.message, {'Content-Type' : 'application/json'})
                     response.end(JSON.stringify(task))
                   else
-                    apiFunctions.watchTask(task._id, config.get('DEVICE_ONLINE_THRESHOLD', deviceId), (err) ->
+                    apiFunctions.watchTask(task._id, config.get('DEVICE_ONLINE_THRESHOLD', deviceId), (err, status) ->
                       if err
-                        response.writeHead(202, {'Content-Type' : 'application/json'})
-                        response.end(JSON.stringify(task))
+                        response.writeHead(500)
+                        response.end(errorToString(err))
                         return
-                      response.writeHead(200, {'Content-Type' : 'application/json'})
-                      response.end(JSON.stringify(task))
+
+                      if status is 'timeout'
+                        response.writeHead(202, 'Task queued but not processed', {'Content-Type' : 'application/json'})
+                        response.end(JSON.stringify(task))
+                      else if status is 'fault'
+                        db.tasksCollection.findOne({_id : task._id}, (err, task) ->
+                          if err
+                            response.writeHead(500)
+                            response.end(errorToString(err))
+                            return
+
+                          response.writeHead(202, 'Task faulted', {'Content-Type' : 'application/json'})
+                          response.end(JSON.stringify(task))
+                        )
+                      else
+                        response.writeHead(200, {'Content-Type' : 'application/json'})
+                        response.end(JSON.stringify(task))
                     )
                 )
               else