diff options
Diffstat (limited to 'include/smarty/libs/sysplugins/smarty_template_cached.php')
| -rw-r--r-- | include/smarty/libs/sysplugins/smarty_template_cached.php | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/include/smarty/libs/sysplugins/smarty_template_cached.php b/include/smarty/libs/sysplugins/smarty_template_cached.php new file mode 100644 index 000000000..cecf42986 --- /dev/null +++ b/include/smarty/libs/sysplugins/smarty_template_cached.php @@ -0,0 +1,246 @@ +<?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(); + + /** + * create Cached Object container + * + * @param Smarty_Internal_Template $_template template object + */ + 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)) { + require SMARTY_SYSPLUGINS_DIR . 'smarty_cacheresource.php'; + } + $this->handler = Smarty_CacheResource::load($_template->smarty); + } + + /** + * @param Smarty_Internal_Template $_template + * + * @return Smarty_Template_Cached + */ + 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 == Smarty::CACHING_LIFETIME_CURRENT || + $_template->caching == Smarty::CACHING_LIFETIME_SAVED) || $_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) { + $_template->smarty->_debug->start_cache($_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->smarty->compile_check == 1 && + $_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 content + */ + public function read(Smarty_Internal_Template $_template) + { + if (!$_template->source->handler->recompiled) { + return $this->handler->readCachedContent($_template); + } + return false; + } +} |