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<?php
/**
* Index caching functions
*
* webtrees: Web based Family History software
* Copyright (C) 2010 webtrees development team.
*
* Derived from PhpGedView
* Copyright (C) 2002 to 2009 PGV Development Team. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @package webtrees
* @subpackage Display
* @version $Id$
*/
if (!defined('WT_WEBTREES')) {
header('HTTP/1.0 403 Forbidden');
exit;
}
define('WT_INDEX_CACHE_PHP', '');
/**
* load a cached block from a file
* @param array $block [0]:name of the block to load, [1]:block's configuration
* @param int $index An id for this block in the case of multiple instances of the same block on the page
* @return boolean returns false if the block could not be loaded from cache
*/
function loadCachedBlock($block, $index) {
global $WT_BLOCKS, $INDEX_DIRECTORY, $theme_name, $GEDCOM;
//-- ignore caching when DEBUG is set
//-- ignore caching for logged in users
if (WT_DEBUG || WT_USER_ID) {
return false;
}
//-- ignore cache when its life is not configured or when its life is zero
$cacheLife = $WT_BLOCKS[$block[0]]['config']['cache'];
if ($cacheLife==0) return false;
$fname = "{$INDEX_DIRECTORY}/cache/{$theme_name}/".WT_LOCALE."/".WT_GEDCOM."/{$index}_{$block[0]}";
if (file_exists($fname)) {
// Check for expired cache (<0: no expiry), 0: immediate, >0: expires in x days) Zero already checked
if ($cacheLife > 0) {
$modtime = filemtime($fname);
//-- time should start at the beginning of the day
$modtime = $modtime - (date("G",$modtime)*60*60 + date("i",$modtime)*60 + date("s",$modtime));
$checktime = ($cacheLife*24*60*60);
$modtime = $modtime+$checktime;
if ($modtime<time()) return false;
}
return @readfile($fname);
}
return false;
}
/**
* Save a block's content to the cache file
* @param array $block [0]:name of the block to save, [1]:block's configuration
* @param int $index An id for this block in the case of multiple instances of the same block on the page
* @param string $content the actual content to save in the cache
* @return boolean returns false if the block could not be saved to cache
*/
function saveCachedBlock($block, $index, $content) {
global $WT_BLOCKS, $INDEX_DIRECTORY, $theme_name, $GEDCOM;
//-- ignore caching when DEBUG is set
//-- ignore caching for logged in users
if (WT_DEBUG || WT_USER_ID) {
return false;
}
//-- ignore cache when its life is not configured or when its life is zero
$cacheLife=$WT_BLOCKS[$block[0]]['config']['cache'];
if ($cacheLife==0) {
return false;
}
$fname = $INDEX_DIRECTORY."/cache";
@mkdir($fname);
$fname .= "/".$theme_name;
@mkdir($fname);
$fname .= "/".WT_LOCALE;
@mkdir($fname);
$fname .= "/".$GEDCOM;
@mkdir($fname);
$fname .= "/".$index."_".$block[0];
$fp = @fopen($fname, "wb");
if (!$fp) return false;
@fwrite($fp, $content);
@fclose($fp);
return true;
}
/*
* Re-worked copy of a similar function in dir_editor.php
*
* This function, called recursively, deletes all subdirectories and files in those subdirectories
*
* Note: This function should really be in one of the other "includes/functions/..." scripts.
*/
function removeDir($dir) {
if (!is_writable($dir)) {
if (!@chmod($dir, WT_PERM_EXE)) return FALSE;
}
$d = dir($dir);
while (FALSE !== ($entry = $d->read())) {
if ($entry == '.' || $entry == '..') continue;
$entry = $dir . '/' . $entry;
if (is_dir($entry)) {
if (!removeDir($entry)) return FALSE;
continue;
}
if (!@unlink($entry)) {
$d->close();
return FALSE;
}
}
$d->close();
rmdir($dir);
return TRUE;
}
/**
* clears the cache files
*/
function clearCache() {
global $INDEX_DIRECTORY;
removeDir("{$INDEX_DIRECTORY}/cache");
}
?>
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