class User

<?php
class User{
    private $_db,
            $_data,
            $_sessionName,
            $_isLoggedIn;

    public function __construct($user = NULL){
        $this->_db = DB::getInstance();

        $this->_sessionName = Config::get('session/session_name');

        if(!$user){
            if(Session::exists($this->_sessionName)){
                $user = Session::get($this->_sessionName);

                if($this->find($user)){
                    $this->_isLoggedIn = true;
                } else {
                    //logout
                }
            }
        } else {
            $this->find($user);
        }
    }

    public function create($fields){
        if(!$this->_db->insert('users', $fields)){
            throw new Exception('There is a problem creating user');
        }
    }

    public function find($user = NULL){
        if($user){
            $field = (is_numeric($user)) ? 'id' : 'email';
            $data  = $this->_db->get('users', array($field, '=', $user));

            if($data->count()){
                $this->_data = $data->first();
                return true;
            }
        }
        return false;
    }

    public function login($email = NULL, $password = NULL){
        $user = $this->find($email);

        if($user){
            if($this->data()->password === Hash::make($password, $this->data()->salt)){
                Session::put($this->_sessionName, $this->data()->id);
                return true;
            }
        }
        return false;
    }

    public function logout(){
        Session::delete($this->_sessionName);
    }

    public function data(){
        return $this->_data;
    }

    public function isLoggedIn(){
        return $this->_isLoggedIn;
    }
}