jidaikobo-shibata/a11yc

<?php
/**
 * Kontiki\Auth
 *
 * @package    part of Kontiki
 * @author     Jidaikobo Inc.
 * @license    The MIT License (MIT)
 * @copyright  Jidaikobo Inc.
 * @link       http://www.jidaikobo.com
 */
namespace Kontiki;

class Auth
{
    public static $user_id;

    /**
     * forge
     * start session
     *
     * @param String $session_name
     * @return Void
     */
    public static function forge($session_name = 'KNTKSESSID')
    {
        if ( ! Session::isStarted())
        {
            Session::forge($session_name);
        }
    }

    /**
     * auth
     *
     * @return Bool
     */
    public static function auth ()
    {
        // check is already logged in?
        if (Session::show('auth', 'uid')) return TRUE;

        // is post exists?
        $username = Input::post('username', false);
        $password = Input::post('password', false);

        if ($username === false || $password === false) return false;
        $users = Users::fetchUsers();
        foreach ($users as $id => $v)
        {
            if ($v[0] === $username && static::verify($password, $v[1]))
            {
                Session::add('auth', 'uid', $id);
                static::$user_id = $id;
                return TRUE;
            }
        }

        // login failed
        return FALSE;
    }

    /**
     * logout
     *
     * @return Void
     */
    public static function logout ()
    {
        Session::destroy();
    }

    /**
     * hash
     *
     * @param String $str
     * @return String
     */
    public static function hash ($str)
    {
        return password_hash($str, CRYPT_BLOWFISH);
    }

    /**
     * verify
     *
     * @param String|Array $password
     * @param String $hash
     * @return Bool
     */
    public static function verify ($password, $hash)
    {
        if ( ! is_string($password)) return false;
        return password_verify($password, $hash);
    }
}