<?php

/**

 * Smarty Internal Plugin Function Call Handler

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 * @author     Uwe Tews

 */

/**

 * This class does handles template functions defined with the {function} tag missing in cache file.

 * It can happen when the template function was called with the nocache option or within a nocache section.

 * The template function will be loaded from it's compiled template file, executed and added to the cache file

 * for later use.

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 */

class Smarty_Internal_Function_Call_Handler {

    /**

     * This function handles calls to template functions defined by {function}

     * It does create a PHP function at the first call

     *

     * @param string $_name template function name

     * @param Smarty_Internal_Template $_smarty_tpl

     * @param string $_function PHP function name

     * @param array $_params Smarty variables passed as call parameter

     * @param bool $_nocache nocache flag

     *

     * @return bool

     */

    public static function call($_name, Smarty_Internal_Template $_smarty_tpl, $_function, $_params, $_nocache) {

        $funcParam = $_smarty_tpl->properties['tpl_function'][$_name];

        if (is_file($funcParam['compiled_filepath'])) {

            // read compiled file

            $code = file_get_contents($funcParam['compiled_filepath']);

            // grab template function

            if (preg_match("/\/\* {$_function} \*\/([\S\s]*?)\/\*\/ {$_function} \*\//", $code, $match)) {

                // grab source info from file dependency

                preg_match("/\s*'{$funcParam['uid']}'([\S\s]*?)\),/", $code, $match1);

                unset($code);

                $output = '';

                // make PHP function known

                eval($match[0]);

                if (function_exists($_function)) {

                    // search cache file template

                    $tplPtr = $_smarty_tpl;

                    while (!isset($tplPtr->cached) && isset($tplPtr->parent)) {

                        $tplPtr = $tplPtr->parent;

                    }

                    // add template function code to cache file

                    if (isset($tplPtr->cached)) {

                        $cache = $tplPtr->cached;

                        $content = $cache->read($tplPtr);

                        if ($content) {

                            // check if we must update file dependency

                            if (!preg_match("/'{$funcParam['uid']}'([\S\s]*?)'nocache_hash'/", $content, $match2)) {

                                $content = preg_replace("/('file_dependency'([\S\s]*?)\()/", "\\1{$match1[0]}", $content);

                            }

                            $cache->write($tplPtr, $content . "<?php " . $match[0] . "?>\n");

                        }

                    }

                    return true;

                }

            }

        }

        return false;

    }

}