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