<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2010 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 *
 * @package     Session
 * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
 * @link        www.phraseanet.com
 */
class Session_Storage_CommandLine extends Session_Storage_Abstract implements Session_Storage_Interface
{
    /**
     *
     * @var Session_Storage_CommandLine
     */
    protected static $_instance;

    /**
     *
     * @var string
     */
    private static $_name = '';

    /**
     *
     * @var Array
     */
    private static $_cli_storage = array();

    /**
     *
     * @param string $session_name
     * @return Session_Storage_CommandLine
     */
    public static function getInstance($session_name)
    {
        if ( ! self::$_instance) {
            self::$_instance = new self($session_name);
        }

        return self::$_instance;
    }

    /**
     *
     * @param string $name
     * @return Session_Storage_CommandLine
     */
    protected function __construct($name)
    {
        return $this;
    }

    /**
     *
     * @param string $key
     * @return mixed
     */
    public function get($key, $default_value = null)
    {
        return isset(self::$_cli_storage[self::$_name][$key]) ? self::$_cli_storage[self::$_name][$key] : $default_value;
    }

    /**
     *
     * @param string $key
     * @return mixed
     */
    public function has($key)
    {
        return isset(self::$_cli_storage[self::$_name][$key]);
    }

    /**
     *
     * @param string $key
     * @param mixed $value
     * @return boolean
     */
    public function set($key, $value)
    {
        $this->require_open_storage();

        return self::$_cli_storage[self::$_name][$key] = $value;
    }

    /**
     *
     * @param string $key
     * @return boolean
     */
    public function remove($key)
    {
        $retval = null;
        $this->require_open_storage();

        if (isset(self::$_cli_storage[self::$_name][$key])) {
            $retval = self::$_cli_storage[self::$_name][$key];
            unset(self::$_cli_storage[self::$_name][$key]);
        }

        return $retval;
    }

    /**
     * Return PHP session name
     *
     * @return string
     */
    public function getName()
    {
        return 'commandLine';
    }

    /**
     * Return PHP session Id
     *
     * @return string
     */
    public function getId()
    {
        return 'commandLine';
    }

    public function reset()
    {
        self::$_cli_storage[self::$_name] = array();

        return;
    }

    /**
     *
     * @return Void
     */
    public function destroy()
    {
        unset(self::$_cli_storage[self::$_name]);

        return;
    }
}