<?php

abstract class Qs_Sys_Smarty_File extends Qs_Smarty
{
    protected static $_resourceName = 'Qs_File';
    protected static $_folder = null;

    public function __construct()
    {
        self::$_folder = BASE_PATH . '/tpl/';
    }

    public static function getInstance()
    {
        if (null === self::$_instance) {
            self::$_instance = new Qs_Smarty_File();
        }
        return self::$_instance;
    }

    public static function render($data)
    {
        self::_checkTemplate();

        self::getObject()->register_resource(self::$_resourceName,
            array(self::getInstance(), "getTemplate", "getTimestamp", "getSecure", "getTrusted"));

        self::_assignVariables($data);
        $debug = Zend_Registry::get('debug');
        $debug->setErrorReporting($debug->getErrorReporting() ^ E_NOTICE);
        $template = self::getObject()->fetch(self::$_resourceName . ':' . self::getTemplateName());
        $debug->restoreErrorReporting();
        return $template;
    }

    public function getTemplate($tpl_name, &$tpl_source, &$smarty_obj)
    {
        if (!file_exists(self::$_folder . self::$_template)) {
            throw new Qs_Exception('Template file not exists!');
        }
        $tpl_source = file_get_contents(self::$_folder . self::$_template);
        return empty($tpl_source) ? false : true;
    }

    public static function getTemplateName()
    {
        return is_null(self::$_templateName) ?
            str_replace('/', '-', (string) self::$_template) : (string) self::$_templateName;
    }

    public function getTimestamp($tpl_name, &$tpl_timestamp, &$smarty_obj)
    {
        if (!file_exists(self::$_folder . self::$_template)) {
            throw new Qs_Exception('Template file not exists!');
        }
        $tpl_timestamp = filemtime(self::$_folder . self::$_template);
        return true;
    }
}