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<?php
/**
* Created by PhpStorm.
* User: Uwe Tews
* Date: 04.12.2014
* Time: 06:08
*/
/**
* Smarty Resource Data Object
* Cache Data Container for Template Files
*
* @package Smarty
* @subpackage TemplateResources
* @author Rodney Rehm
*/
class Smarty_Template_Cached extends Smarty_Template_Resource_Base
{
/**
* Cache Is Valid
*
* @var boolean
*/
public $valid = null;
/**
* CacheResource Handler
*
* @var Smarty_CacheResource
*/
public $handler = null;
/**
* Template Cache Id (Smarty_Internal_Template::$cache_id)
*
* @var string
*/
public $cache_id = null;
/**
* saved cache lifetime in seconds
*
* @var integer
*/
public $cache_lifetime = 0;
/**
* Id for cache locking
*
* @var string
*/
public $lock_id = null;
/**
* flag that cache is locked by this instance
*
* @var bool
*/
public $is_locked = false;
/**
* Source Object
*
* @var Smarty_Template_Source
*/
public $source = null;
/**
* Nocache hash codes of processed compiled templates
*
* @var array
*/
public $hashes = array();
/**
* Flag if this is a cache resource
*
* @var bool
*/
public $isCache = true;
/**
* create Cached Object container
*
* @param Smarty_Internal_Template $_template template object
*
* @throws \SmartyException
*/
public function __construct(Smarty_Internal_Template $_template)
{
$this->compile_id = $_template->compile_id;
$this->cache_id = $_template->cache_id;
$this->source = $_template->source;
if (!class_exists('Smarty_CacheResource', false)) {
include SMARTY_SYSPLUGINS_DIR . 'smarty_cacheresource.php';
}
$this->handler = Smarty_CacheResource::load($_template->smarty);
}
/**
* @param Smarty_Internal_Template $_template
*
* @return Smarty_Template_Cached
*/
public static function load(Smarty_Internal_Template $_template)
{
$_template->cached = new Smarty_Template_Cached($_template);
$_template->cached->handler->populate($_template->cached, $_template);
// caching enabled ?
if (!$_template->caching || $_template->source->handler->recompiled
) {
$_template->cached->valid = false;
}
return $_template->cached;
}
/**
* Render cache template
*
* @param \Smarty_Internal_Template $_template
* @param bool $no_output_filter
*
* @throws \Exception
*/
public function render(Smarty_Internal_Template $_template, $no_output_filter = true)
{
if ($this->isCached($_template)) {
if ($_template->smarty->debugging) {
if (!isset($_template->smarty->_debug)) {
$_template->smarty->_debug = new Smarty_Internal_Debug();
}
$_template->smarty->_debug->start_cache($_template);
}
if (!$this->processed) {
$this->process($_template);
}
$this->getRenderedTemplateCode($_template);
if ($_template->smarty->debugging) {
$_template->smarty->_debug->end_cache($_template);
}
return;
} else {
$_template->smarty->ext->_updateCache->updateCache($this, $_template, $no_output_filter);
}
}
/**
* Check if cache is valid, lock cache if required
*
* @param \Smarty_Internal_Template $_template
*
* @return bool flag true if cache is valid
*/
public function isCached(Smarty_Internal_Template $_template)
{
if ($this->valid !== null) {
return $this->valid;
}
while (true) {
while (true) {
if ($this->exists === false || $_template->smarty->force_compile || $_template->smarty->force_cache) {
$this->valid = false;
} else {
$this->valid = true;
}
if ($this->valid && $_template->caching === Smarty::CACHING_LIFETIME_CURRENT
&& $_template->cache_lifetime >= 0 && time() > ($this->timestamp + $_template->cache_lifetime)
) {
// lifetime expired
$this->valid = false;
}
if ($this->valid && $_template->compile_check === Smarty::COMPILECHECK_ON
&& $_template->source->getTimeStamp() > $this->timestamp
) {
$this->valid = false;
}
if ($this->valid || !$_template->smarty->cache_locking) {
break;
}
if (!$this->handler->locked($_template->smarty, $this)) {
$this->handler->acquireLock($_template->smarty, $this);
break 2;
}
$this->handler->populate($this, $_template);
}
if ($this->valid) {
if (!$_template->smarty->cache_locking || $this->handler->locked($_template->smarty, $this) === null) {
// load cache file for the following checks
if ($_template->smarty->debugging) {
$_template->smarty->_debug->start_cache($_template);
}
if ($this->handler->process($_template, $this) === false) {
$this->valid = false;
} else {
$this->processed = true;
}
if ($_template->smarty->debugging) {
$_template->smarty->_debug->end_cache($_template);
}
} else {
$this->is_locked = true;
continue;
}
} else {
return $this->valid;
}
if ($this->valid && $_template->caching === Smarty::CACHING_LIFETIME_SAVED
&& $_template->cached->cache_lifetime >= 0
&& (time() > ($_template->cached->timestamp + $_template->cached->cache_lifetime))
) {
$this->valid = false;
}
if ($_template->smarty->cache_locking) {
if (!$this->valid) {
$this->handler->acquireLock($_template->smarty, $this);
} elseif ($this->is_locked) {
$this->handler->releaseLock($_template->smarty, $this);
}
}
return $this->valid;
}
return $this->valid;
}
/**
* Process cached template
*
* @param Smarty_Internal_Template $_template template object
* @param bool $update flag if called because cache update
*/
public function process(Smarty_Internal_Template $_template, $update = false)
{
if ($this->handler->process($_template, $this, $update) === false) {
$this->valid = false;
}
if ($this->valid) {
$this->processed = true;
} else {
$this->processed = false;
}
}
/**
* Read cache content from handler
*
* @param Smarty_Internal_Template $_template template object
*
* @return string|false content
*/
public function read(Smarty_Internal_Template $_template)
{
if (!$_template->source->handler->recompiled) {
return $this->handler->readCachedContent($_template);
}
return false;
}
}