95 lines
2.8 KiB
PHP
95 lines
2.8 KiB
PHP
<?php
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namespace dokuwiki\Cache;
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/**
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* Caching of data of renderer
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*/
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class CacheRenderer extends CacheParser
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{
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/**
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* method contains cache use decision logic
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*
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* @return bool see useCache()
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*/
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public function makeDefaultCacheDecision()
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{
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global $conf;
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if (!parent::makeDefaultCacheDecision()) {
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return false;
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}
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if (!isset($this->page)) {
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return true;
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}
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// meta cache older than file it depends on?
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if ($this->_time < @filemtime(metaFN($this->page, '.meta'))) {
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return false;
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}
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// check current link existence is consistent with cache version
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// first check the purgefile
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// - if the cache is more recent than the purgefile we know no links can have been updated
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if ($this->_time >= @filemtime($conf['cachedir'] . '/purgefile')) {
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return true;
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}
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// for wiki pages, check metadata dependencies
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$metadata = p_get_metadata($this->page);
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if (!isset($metadata['relation']['references']) ||
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empty($metadata['relation']['references'])) {
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return true;
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}
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foreach ($metadata['relation']['references'] as $id => $exists) {
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if ($exists != page_exists($id, '', false)) {
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return false;
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}
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}
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return true;
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}
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protected function addDependencies()
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{
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global $conf;
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// default renderer cache file 'age' is dependent on 'cachetime' setting, two special values:
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// -1 : do not cache (should not be overridden)
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// 0 : cache never expires (can be overridden) - no need to set depends['age']
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if ($conf['cachetime'] == -1) {
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$this->_nocache = true;
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return;
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} elseif ($conf['cachetime'] > 0) {
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$this->depends['age'] = isset($this->depends['age']) ?
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min($this->depends['age'], $conf['cachetime']) : $conf['cachetime'];
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}
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// renderer cache file dependencies ...
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$files = array(
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DOKU_INC . 'inc/parser/' . $this->mode . '.php', // ... the renderer
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);
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// page implies metadata and possibly some other dependencies
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if (isset($this->page)) {
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// for xhtml this will render the metadata if needed
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$valid = p_get_metadata($this->page, 'date valid');
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if (!empty($valid['age'])) {
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$this->depends['age'] = isset($this->depends['age']) ?
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min($this->depends['age'], $valid['age']) : $valid['age'];
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}
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}
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$this->depends['files'] = !empty($this->depends['files']) ?
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array_merge($files, $this->depends['files']) :
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$files;
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parent::addDependencies();
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}
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}
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