<?php

/**

 * Smarty plugin

 * @package Smarty

 * @subpackage plugins

 */

/**

 * Prepend the cache information to the cache file

 * and write it

 *

 * @param string $tpl_file

 * @param string $cache_id

 * @param string $compile_id

 * @param string $results

 * @return true|null

 */

 // $tpl_file, $cache_id, $compile_id, $results

function smarty_core_write_cache_file($params, &$smarty)

{

    // put timestamp in cache header

    $smarty->_cache_info['timestamp'] = time();

    if ($smarty->cache_lifetime > -1){

        // expiration set

        $smarty->_cache_info['expires'] = $smarty->_cache_info['timestamp'] + $smarty->cache_lifetime;

    } else {

        // cache will never expire

        $smarty->_cache_info['expires'] = -1;

    }

    // collapse nocache.../nocache-tags

    if (preg_match_all('!\{(/?)nocache\:[0-9a-f]{32}#\d+\}!', $params['results'], $match, PREG_PATTERN_ORDER)) {

        // remove everything between every pair of outermost noache.../nocache-tags

        // and replace it by a single nocache-tag

        // this new nocache-tag will be replaced by dynamic contents in

        // smarty_core_process_compiled_includes() on a cache-read

        $match_count = count($match[0]);

        $results = preg_split('!(\{/?nocache\:[0-9a-f]{32}#\d+\})!', $params['results'], -1, PREG_SPLIT_DELIM_CAPTURE);

        $level = 0;

        $j = 0;

        for ($i=0, $results_count = count($results); $i < $results_count && $j < $match_count; $i++) {

            if ($results[$i] == $match[0][$j]) {

                // nocache tag

                if ($match[1][$j]) { // closing tag

                    $level--;

                    unset($results[$i]);

                } else { // opening tag

                    if ($level++ > 0) unset($results[$i]);

                }

                $j++;

            } elseif ($level > 0) {

                unset($results[$i]);

            }

        }

        $params['results'] = implode('', $results);

    }

    $smarty->_cache_info['cache_serials'] = $smarty->_cache_serials;

    // prepend the cache header info into cache file

    $_cache_info = serialize($smarty->_cache_info);

    $params['results'] = strlen($_cache_info) . "\n" . $_cache_info . $params['results'];

    if (!empty($smarty->cache_handler_func)) {

        // use cache_handler function

        call_user_func_array($smarty->cache_handler_func,

                             array('write', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));

    } else {

        // use local cache file

        if(!@is_writable($smarty->cache_dir)) {

            // cache_dir not writable, see if it exists

            if(!@is_dir($smarty->cache_dir)) {

                $smarty->trigger_error('the $cache_dir \'' . $smarty->cache_dir . '\' does not exist, or is not a directory.', E_USER_ERROR);

                return false;

            }

            $smarty->trigger_error('unable to write to $cache_dir \'' . realpath($smarty->cache_dir) . '\'. Be sure $cache_dir is writable by the web server user.', E_USER_ERROR);

            return false;

        }

        $_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);

        $_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);

        $_params = array('filename' => $_cache_file, 'contents' => $params['results'], 'create_dirs' => true);

        require_once(SMARTY_CORE_DIR . 'core.write_file.php');

        smarty_core_write_file($_params, $smarty);

        return true;

    }

}

/* vim: set expandtab: */

?>