Return error in request

lib/store.js

@@ -5,12 +5,23 @@ var store;
 var adapter;
 var Report;
 
+function error(msg) {
+  return new Promise(function(resolve, reject) {
+    return resolve({ error: msg });
+  });
+}
+
 function add(data) {
+  if (!data.type || !data.payload) {
+    return error('Required parameters aren\'t specified.');
+  }
+  
   var obj = {
     id: uuid.v4(),
     type: data.type,
     payload: data.payload
   };
+
   if (!adapter) {
     return new Promise(function(resolve) {
       var report = Report.inject(obj);

lib/worker.js

@@ -23,10 +23,14 @@ module.exports.run = function(worker) {
   app.post('/', function(req, res) {
     if (!req.body) return res.status(404).end();
     if (!store) store = createStore(worker.options);
-    store.add(req.body).then(function(r) {
-      scServer.exchange.publish('log', req.body);
-      res.send({ id: r.id });
-    });
+
+    switch(req.body.op) {
+      default:
+        store.add(req.body).then(function(r) {
+          scServer.exchange.publish('log', req.body);
+          res.send({ id: r.id, error: r.error });
+        });
+    }
   });
 
   scServer.addMiddleware(scServer.MIDDLEWARE_EMIT, function (req, next) {