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<?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 _useCache() |
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{ |
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global $conf; |
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if (!parent::_useCache()) { |
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return false; |
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} |
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if (!isset($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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splitbrain /
dokuwiki
