<?php

namespace Symfony\Framework\FoundationBundle;

use Symfony\Components\EventDispatcher\EventDispatcher;
use Symfony\Components\EventDispatcher\Event;
use Symfony\Framework\FoundationBundle\Session\SessionInterface;

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

/**
 * User.
 *
 * @package    Symfony
 * @subpackage Framework_FoundationBundle
 * @author     Fabien Potencier <fabien.potencier@symfony-project.com>
 */
class User
{
    protected $session;
    protected $locale;
    protected $attributes;
    protected $oldFlashes;

    /**
     * Initialize the user class
     *
     * @param EventDispatcher  $dispatcher A EventDispatcher instance
     * @param SessionInterface $session    A SessionInterface instance
     * @param array            $options    An array of options
     */
    public function __construct(EventDispatcher $dispatcher, SessionInterface $session, $options = array())
    {
        $this->dispatcher = $dispatcher;
        $this->session    = $session;

        $this->setAttributes($session->read('_user', array(
            '_flash'   => array(),
            '_locale'  => isset($options['default_locale']) ? $options['default_locale'] : 'en',
        )));

        // flag current flash to be removed at shutdown
        $this->oldFlashes = array_flip(array_keys($this->getFlashMessages()));
    }

    /**
     * Returns a user attribute
     *
     * @param string $name    The attribute name
     * @param mixed  $default The default value
     *
     * @return mixed
     */
    public function getAttribute($name, $default = null)
    {
        return array_key_exists($name, $this->attributes) ? $this->attributes[$name] : $default;
    }

    /**
     * Sets an user attribute.
     *
     * @param string $name
     * @param mixed  $value
     */
    public function setAttribute($name, $value)
    {
        $this->attributes[$name] = $value;
    }

    /**
     * Returns user attributes
     *
     * @return array User attributes
     */
    public function getAttributes()
    {
        return $this->attributes;
    }

    /**
     * Sets user attributes
     *
     * @param array $attributes Attributes
     */
    public function setAttributes($attributes)
    {
        $this->attributes = $attributes;
    }

    /**
     * Returns the user locale
     *
     * @return string
     */
    public function getLocale()
    {
        return $this->getAttribute('_locale');
    }

    /**
     * Sets the user locale.
     *
     * @param string $locale
     */
    public function setLocale($locale)
    {
        if ($this->locale != $locale) {
            $this->setAttribute('_locale', $locale);

            $this->dispatcher->notify(new Event($this, 'user.change_locale', array('locale' => $locale)));
        }
    }

    public function getFlashMessages()
    {
        return $this->attributes['_flash'];
    }

    public function setFlashMessages($values)
    {
        $this->attributes['_flash'] = $values;
    }

    public function getFlash($name, $default = null)
    {
        return $this->hasFlash($name) ? $this->attributes['_flash'][$name] : $default;
    }

    public function setFlash($name, $value)
    {
        $this->attributes['_flash'][$name] = $value;
        unset($this->oldFlashes[$name]);
    }

    public function hasFlash($name)
    {
        return array_key_exists($name, $this->attributes['_flash']);
    }

    public function __destruct()
    {
        $this->attributes['_flash'] = array_diff_key($this->attributes['_flash'], $this->oldFlashes);

        $this->session->write('_user', $this->attributes);
    }
}