<?php
/**
* Smarty Internal Plugin CacheResource File
*
* @package Smarty
* @subpackage Cacher
* @author Uwe Tews
* @author Rodney Rehm
*/
/**
* This class does contain all necessary methods for the HTML cache on file system
* Implements the file system as resource for the HTML cache Version ussing nocache inserts.
*
* @package Smarty
* @subpackage Cacher
*/
class Smarty_Internal_CacheResource_File extends Smarty_CacheResource
{
/**
* populate Cached Object with meta data from Resource
*
* @param Smarty_Template_Cached $cached cached object
* @param Smarty_Internal_Template $_template template object
*
* @return void
*/
public function populate(Smarty_Template_Cached $cached, Smarty_Internal_Template $_template)
{
$_source_file_path = str_replace(':', '.', $_template->source->filepath);
$_cache_id = isset($_template->cache_id) ? preg_replace('![^\w\|]+!', '_', $_template->cache_id) : null;
$_compile_id = isset($_template->compile_id) ? preg_replace('![^\w]+!', '_', $_template->compile_id) : null;
$_filepath = $_template->source->uid;
// if use_sub_dirs, break file into directories
if ($_template->smarty->use_sub_dirs) {
$_filepath = substr($_filepath, 0, 2) . DS . substr($_filepath, 2, 2) . DS . substr($_filepath, 4, 2) . DS .
$_filepath;
}
$_compile_dir_sep = $_template->smarty->use_sub_dirs ? DS : '^';
if (isset($_cache_id)) {
$_cache_id = str_replace('|', $_compile_dir_sep, $_cache_id) . $_compile_dir_sep;
} else {
$_cache_id = '';
}
if (isset($_compile_id)) {
$_compile_id = $_compile_id . $_compile_dir_sep;
} else {
$_compile_id = '';
}
$_cache_dir = $_template->smarty->getCacheDir();
if ($_template->smarty->cache_locking) {
// create locking file name
// relative file name?
if (!preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_cache_dir)) {
$_lock_dir = rtrim(getcwd(), '/\\') . DS . $_cache_dir;
} else {
$_lock_dir = $_cache_dir;
}
$cached->lock_id = $_lock_dir . sha1($_cache_id . $_compile_id . $_template->source->uid) . '.lock';
}
$cached->filepath = $_cache_dir . $_cache_id . $_compile_id . $_filepath . '.' . basename($_source_file_path) .
'.php';
$cached->timestamp = $cached->exists = is_file($cached->filepath);
if ($cached->exists) {
$cached->timestamp = filemtime($cached->filepath);
}
}
/**
* populate Cached Object with timestamp and exists from Resource
*
* @param Smarty_Template_Cached $cached cached object
*
* @return void
*/
public function populateTimestamp(Smarty_Template_Cached $cached)
{
$cached->timestamp = $cached->exists = is_file($cached->filepath);
if ($cached->exists) {
$cached->timestamp = filemtime($cached->filepath);
}
}
/**
* Read the cached template and process its header
*
* @param Smarty_Internal_Template $_template template object
* @param Smarty_Template_Cached $cached cached object
* @param bool $update flag if called because cache update
*
* @return boolean true or false if the cached content does not exist
*/
public function process(Smarty_Internal_Template $_template, Smarty_Template_Cached $cached = null, $update = false)
{
/** @var Smarty_Internal_Template $_smarty_tpl
* used in included file
*/
$_smarty_tpl = $_template;
$_template->cached->valid = false;
if ($update && defined('HHVM_VERSION')) {
return $_template->smarty->ext->_hhvm->includeHhvm($_template, $_template->cached->filepath);
} else {
return @include $_template->cached->filepath;
}
}
/**
* Write the rendered template output to cache
*
* @param Smarty_Internal_Template $_template template object
* @param string $content content to cache
*
* @return boolean success
*/
public function writeCachedContent(Smarty_Internal_Template $_template, $content)
{
if ($_template->smarty->ext->_writeFile->writeFile($_template->cached->filepath, $content, $_template->smarty) === true) {
if (function_exists('opcache_invalidate')) {
opcache_invalidate($_template->cached->filepath);
}
$cached = $_template->cached;
$cached->timestamp = $cached->exists = is_file($cached->filepath);
if ($cached->exists) {
$cached->timestamp = filemtime($cached->filepath);
return true;
}
}
return false;
}
/**
* Read cached template from cache
*
* @param Smarty_Internal_Template $_template template object
*
* @return string content
*/
public function readCachedContent(Smarty_Internal_Template $_template)
{
if (is_file($_template->cached->filepath)) {
return file_get_contents($_template->cached->filepath);
}
return false;
}
/**
* Empty cache
*
* @param Smarty $smarty
* @param integer $exp_time expiration time (number of seconds, not timestamp)
*
* @return integer number of cache files deleted
*/
public function clearAll(Smarty $smarty, $exp_time = null)
{
return Smarty_Internal_Extension_Clear::clear($smarty, null, null, null, $exp_time);
}
/**
* Empty cache for a specific template
*
* @param Smarty $smarty
* @param string $resource_name template name
* @param string $cache_id cache id
* @param string $compile_id compile id
* @param integer $exp_time expiration time (number of seconds, not timestamp)
*
* @return integer number of cache files deleted
*/
public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
{
return Smarty_Internal_Extension_Clear::clear($smarty, $resource_name, $cache_id, $compile_id, $exp_time);
}
/**
* Check is cache is locked for this template
*
* @param Smarty $smarty Smarty object
* @param Smarty_Template_Cached $cached cached object
*
* @return boolean true or false if cache is locked
*/
public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached)
{
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
clearstatcache(true, $cached->lock_id);
} else {
clearstatcache();
}
if (is_file($cached->lock_id)) {
$t = @filemtime($cached->lock_id);
return $t && (time() - $t < $smarty->locking_timeout);
} else {
return false;
}
}
/**
* Lock cache for this template
*
* @param Smarty $smarty Smarty object
* @param Smarty_Template_Cached $cached cached object
*
* @return bool|void
*/
public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached)
{
$cached->is_locked = true;
touch($cached->lock_id);
}
/**
* Unlock cache for this template
*
* @param Smarty $smarty Smarty object
* @param Smarty_Template_Cached $cached cached object
*
* @return bool|void
*/
public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached)
{
$cached->is_locked = false;
@unlink($cached->lock_id);
}
}