class Paths
    {
        const RESOURCE_USER_AVATAR = 1;
        const RESOURCE_USER_AVATAR_THUMB = 2;
        const RESOURCE_VEHICLE_IMAGE = 3;
        const RESOURCE_VEHICLE_IMAGE_THUMB = 4;

        const USER_FILES_PATH = '/userfiles/';

        static protected $_paths = array(
            self::RESOURCE_USER_AVATAR => 'userfiles/avatars/',
            self::RESOURCE_USER_AVATAR_THUMB => 'userfiles/avatars/',
            self::RESOURCE_VEHICLE_IMAGE => 'userfiles/vehicles/',
            self::RESOURCE_VEHICLE_IMAGE_THUMB => 'userfiles/vehicles/',
        );

        static protected $_filenamePrefixes = array(
            self::RESOURCE_USER_AVATAR => 'avatar_',
            self::RESOURCE_USER_AVATAR_THUMB => 'avatar_thumb_',
            self::RESOURCE_VEHICLE_IMAGE => 'vehicle_',
            self::RESOURCE_VEHICLE_IMAGE_THUMB => 'vehicle_thumb_',
        );
        static protected $_filenameExtensions = array(
            self::RESOURCE_USER_AVATAR => 'png',
            self::RESOURCE_USER_AVATAR_THUMB => 'png',
            self::RESOURCE_VEHICLE_IMAGE => 'png',
            self::RESOURCE_VEHICLE_IMAGE_THUMB => 'png',
        );

        static public function isCurrentPageSsl()
        {
            return (isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] != 'off'));
        }

        static public function getBaseWebUrl()
        {
            $host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '';
            $protocol = self::isCurrentPageSsl() ? 'https' : 'http';
            return $protocol . $host . Yii::app()->baseUrl;
        }

        static public function getStoreRootDir()
        {
            return Yii::app()->basePath . '/';
        }

        static public function getAbsoluteWebUrl($relativePath = '')
        {
            if (!empty($relativePath) and ($relativePath[0] == '/'))
                $relativePath = substr($relativePath, 1);
            return self::getBaseWebUrl() . $relativePath;
        }

    }