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<?php |
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/* @description Transformation Style Sheets - Revolutionising PHP templating * |
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* @author Tom Butler [email protected] * |
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* @copyright 2017 Tom Butler <[email protected]> | https://r.je/ * |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
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* @version 1.2 */ |
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namespace Transphporm\SheetLoader; |
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class TSSFile implements TSSRules { |
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private $fileName; |
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private $filePath; |
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private $cacheName; |
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private $cacheKey; |
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private $cache; |
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private $time; |
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public function __construct($fileName, \Transphporm\FilePath $filePath, $cache, $time) { |
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$this->fileName = $fileName; |
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$this->filePath = $filePath; |
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$this->cache = $cache; |
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$this->time = isset($time) ? $time : time(); |
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$this->cacheName = $this->fileName; |
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} |
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private function getRulesFromCache($file) { |
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//Try to load the cached rules, if not set in the cache (or expired) parse the supplied sheet |
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$rules = $this->cache->load($this->cacheName, filemtime($file)); |
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if (!isset($this->cacheKey) && isset($rules['cacheKey'])) { |
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$this->cacheKey = $rules['cacheKey']; |
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} |
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if ($rules) { |
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foreach ($rules['import'] as $file) { |
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//Check that the import file hasn't been changed since the cache was written |
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if (filemtime($file) > $rules['ctime']) return false; |
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} |
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} |
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return $rules; |
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} |
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public function setCacheKey($tokens) { |
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$this->cacheKey = $tokens; |
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} |
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public function updateRequired($data) { |
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$this->cacheName = $this->getCacheKey($data); |
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$rules = $this->getRulesFromCache($this->fileName); |
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//Nothing was cached or the TSS file has changed, update is required |
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if (empty($rules)) return true; |
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//Find the sheet's minimum update-frequency, if it hasn't passed then no updates are required |
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if ($rules['ctime']+$rules['minFreq'] <= $this->time) return true; |
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return false; |
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} |
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public function getCacheKey($data) { |
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$this->getRulesFromCache($this->fileName); |
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if ($this->cacheKey) { |
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$parser = new \Transphporm\Parser\Value($data); |
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$cacheKey = $parser->parseTokens($this->cacheKey)[0]; |
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$this->cacheName = $cacheKey . $this->fileName; |
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return $cacheKey; |
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} |
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else return $this->fileName; |
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} |
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public function getRules($cssToXpath, $valueParser, $sheetLoader, $indexStart) { |
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$rules = $this->getRulesFromCache($this->fileName); |
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$this->filePath->addPath(dirname(realpath($this->fileName))); |
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if (empty($rules)) $tss = file_get_contents($this->fileName); |
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else return $rules['rules']; |
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return $tss == null ? [] : (new \Transphporm\Parser\Sheet($tss, $cssToXpath, $valueParser, $this->filePath, $sheetLoader))->parse($indexStart); |
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} |
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//write the sheet to cache |
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public function write($rules, $imports = []) { |
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$existing = $this->cache->load($this->fileName, filemtime($this->fileName)); |
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if (isset($existing['import']) && empty($imports)) $imports = $existing['import']; |
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$this->cache->write($this->cacheName, ['rules' => $rules, 'import' => $imports, 'minFreq' => $this->getMinUpdateFreq($rules), 'ctime' => $this->time, 'cacheKey' => $this->cacheKey]); |
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return $rules; |
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} |
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//Gets the minimum update-frequency for a sheet's rules |
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private function getMinUpdateFreq($rules) { |
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$min = \PHP_INT_MAX; |
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foreach ($rules as $rule) { |
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$ruleFreq = $rule->getUpdateFrequency(); |
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if ($ruleFreq < $min) $min = $ruleFreq; |
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} |
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return $min; |
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} |
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} |
Level-2 /
Transphporm
