Merged in Login-System (pull request #7)

[Ivan Diaz] - Some improvements to login/session system

api/controllers/user/login.php

@@ -4,17 +4,29 @@ class LoginController extends Controller {
     const PATH = '/login';
 
     public function handler() {
+        $session = Session::getInstance();
+
         $email =  Controller::request('email');
         $password =  Controller::request('password');
 
-        $user = User::getUser($email, 'email');
-
-        if ($user === null || $user->password !== $password) {
-            Response::respondError(ERRORS::INVALID_CREDENTIALS);
+        if ($session->sessionExists()) {
+            Response::respondError(ERRORS::SESSION_EXISTS);
             return;
         }
 
-        Response::respondSuccess();
-        return;
+        $userInstance = User::getUser($email, $password);
+
+        if ($userInstance !== null) {
+            $session->createSession($userInstance->id);
+
+            Response::respondSuccess(array(
+                'userId' => $userInstance->id,
+                'userEmail' => $userInstance->email,
+                'userIsAdmin' => $userInstance->admin,
+                'token' => $session->getToken()
+            ));
+        } else {
+            Response::respondError(ERRORS::INVALID_CREDENTIALS);
+        }
     }
 }

api/controllers/user/signup.php

@@ -7,16 +7,22 @@ class SignUpController extends Controller {
         $email =  Controller::request('email');
         $password =  Controller::request('password');
 
+        $userId = $this->createNewUserAndRetrieveId($email, $password);
+
+        Response::respondSuccess(array(
+            'userId' => $userId,
+            'userEmail' => $email
+        ));
+    }
+
+    public function createNewUserAndRetrieveId() {
         $userInstance = new User();
         $userInstance->setProperties(array(
             'email' => $email,
-            'password' => $password,
+            'password' => User::hashPassword($password),
             'admin' => 0
         ));
-        $id = $userInstance->store();
 
-        Response::respondSuccess(array(
-            'id' => $id
-        ));
+        return $userInstance->store();
     }
 }

api/models/ERRORS.php

@@ -1,4 +1,5 @@
 <?php
 class ERRORS {
     const INVALID_CREDENTIALS = 'User or password is not defined';
+    const SESSION_EXISTS = 'User is already logged in';
 }

api/models/Session.php

@@ -3,7 +3,7 @@
 class Session {
     private $instance = null;
 
-    private  function __construct() {}
+    private function __construct() {}
 
     public function initSession() {
         session_start();
@@ -22,7 +22,7 @@ class Session {
     }
 
     public function createSession($userId) {
-        $this->store('userid', $userId);
+        $this->store('userId', $userId);
         $this->store('token', $this->generateToken());
     }
 
@@ -30,17 +30,25 @@ class Session {
         return $this->getStoredData('token');
     }
 
+    public function sessionExists() {
+        return !!$this->getToken();
+    }
+
     public function checkAuthentication($data) {
-        return $this->getStoredData('user_id') === $data['user_id'] &&
+        return $this->getStoredData('userId') === $data['userId'] &&
                $this->getStoredData('token') === $data['token'];
     }
 
+    public function isLoggedWithId($userId) {
+        return ($this->getStoredData('userId') === $userId);
+    }
+
     private function store($key, $value) {
         $_SESSION[$key] = $value;
     }
 
     private function getStoredData($key) {
-        return $_SESSION[$key];
+        return $_SESSION[$key] || null;
     }
 
     private function generateToken() {

api/models/User.php

@@ -3,6 +3,20 @@
 class User extends DataStore {
     const TABLE = 'users';
 
+    public static function hashPassword($password) {
+        return password_hash($password);
+    }
+
+    public static function verifyPassword($password, $hash) {
+        return password_verify($password, $hash);
+    }
+
+    public static function authenticate($userEmail, $userPassword) {
+        $user = static::getUser($userEmail, 'email');
+
+        return ($user && static::verifyPassword($userPassword, $user->password)) ? $user : null;
+    }
+
     public static function getProps() {
         return array(
             'email',