Feature: First version of the REST API done

app/controllers/users.js

@@ -0,0 +1,79 @@
+var mongoose        = require('mongoose'),
+    User            = mongoose.model('User'),
+    jwt             = require('jsonwebtoken'),
+    security        = require('../../config/security'),
+    Handler         = require('../helpers/handler'),
+    EventEmitter    = require('../events/listeners');
+
+module.exports = {
+    login :  function(request, response) {
+        var user = request.user;
+        if( !user ) {
+            return response.status(401).json({message: 'Authentication failed'});
+        }
+        
+        return response.json(
+            {
+                username: user.username, 
+                token: jwt.sign(
+            {
+                user_id: user.id
+            }, security.jwt.secretOrKey)
+        
+        });
+    },
+    
+    logout : function(request, response) {
+        return response.status(200).end();
+    },
+    
+    subscribe : function(request, response) {
+        var registered = new User({username: request.body.username, password: request.body.password});
+        registered.validate(function(errors) {
+            if( errors ) {
+                return Handler.errorHandler(errors, 400, response);
+            }
+            
+            User.findOne({username: request.body.username}, function(error, user) {
+                if( error ) {
+                    return response.send(error);
+                }
+                if( !user ) {
+                    registered.save(function(errors) {
+                        if( errors ) {
+                            return Handler.errorHandler(errors, 500, response);
+                        }
+                        
+                        return response.status(201).json({
+                                    username: registered.username, 
+                                    token: jwt.sign(
+                                        {
+                                            user_id: registered.id
+                                        }, security.jwt.secretOrKey)
+                                    });
+                    });
+                } else {
+                    return response.status(409).json({message: 'Account already exists'});
+                }
+            });
+        });
+    },
+    
+    unsubscribe : function(request, response) {
+        var user = request.user;
+         
+        if( !user ) {
+            return response.status(401).json({message: 'Authentication failed'});
+        }
+        
+        User.remove({username: user.username}, function(error) {
+            if( error ) {
+                return response.status(500).send(error);
+            }
+            
+            EventEmitter.eventEmitter.emit(EventEmitter.events.ACCOUNTS_DELETE_BY_USER_ID_EVT, user.id);
+            
+            return response.status(204).end();
+        });
+    }
+}