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<?php |
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use Leafo\ScssPhp\Compiler; |
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use Leafo\ScssPhp\Server; |
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use Leafo\ScssPhp\Version; |
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|
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/** |
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* Class for using SCSS files |
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* |
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* @link https://github.com/leafo/scssphp/ |
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*/ |
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class Minify_ScssCssSource extends Minify_Source |
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{ |
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/** |
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* @var Minify_CacheInterface |
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*/ |
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private $cache; |
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|
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/** |
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* Parsed SCSS cache object |
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* |
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* @var array |
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*/ |
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private $parsed; |
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|
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/** |
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* @inheritdoc |
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*/ |
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public function __construct(array $spec, Minify_CacheInterface $cache) |
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{ |
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parent::__construct($spec); |
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|
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$this->cache = $cache; |
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} |
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|
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/** |
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* Get last modified of all parsed files |
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* |
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* @return int |
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*/ |
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public function getLastModified() |
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{ |
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$cache = $this->getCache(); |
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|
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return $cache['updated']; |
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} |
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|
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/** |
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* Get content |
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* |
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* @return string |
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*/ |
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public function getContent() |
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{ |
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$cache = $this->getCache(); |
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|
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return $cache['content']; |
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} |
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|
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/** |
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* Make a unique cache id for for this source. |
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* |
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* @param string $prefix |
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* |
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* @return string |
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*/ |
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private function getCacheId($prefix = 'minify') |
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{ |
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$md5 = md5($this->filepath); |
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|
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return "{$prefix}_scss_{$md5}"; |
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} |
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|
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/** |
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* Get SCSS cache object |
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* |
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* Runs the compilation if needed |
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* |
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* Implements Leafo\ScssPhp\Server logic because we need to get parsed files without parsing actual content |
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* |
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* @return array |
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*/ |
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private function getCache() |
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{ |
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// cache for single run |
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// so that getLastModified and getContent in single request do not add additional cache roundtrips (i.e memcache) |
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if (isset($this->parsed)) { |
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return $this->parsed; |
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} |
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|
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// check from cache first |
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$cache = null; |
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$cacheId = $this->getCacheId(); |
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if ($this->cache->isValid($cacheId, 0)) { |
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if ($cache = $this->cache->fetch($cacheId)) { |
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$cache = unserialize($cache); |
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} |
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} |
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|
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$input = $cache ? $cache : $this->filepath; |
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|
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if ($this->cacheIsStale($cache)) { |
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$cache = $this->compile($this->filepath); |
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} |
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|
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if (!is_array($input) || $cache['updated'] > $input['updated']) { |
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$this->cache->store($cacheId, serialize($cache)); |
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} |
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|
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return $this->parsed = $cache; |
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} |
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|
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/** |
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* Determine whether .scss file needs to be re-compiled. |
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* |
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* @param array $cache Cache object |
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* |
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* @return boolean True if compile required. |
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*/ |
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private function cacheIsStale($cache) |
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{ |
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if (!$cache) { |
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return true; |
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} |
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|
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$updated = $cache['updated']; |
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foreach ($cache['files'] as $import => $mtime) { |
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$filemtime = filemtime($import); |
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|
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if ($filemtime !== $mtime || $filemtime > $updated) { |
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return true; |
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} |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Compile .scss file |
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* |
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* @param string $filename Input path (.scss) |
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* |
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* @see Server::compile() |
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* @return array meta data result of the compile |
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*/ |
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private function compile($filename) |
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{ |
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$start = microtime(true); |
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$scss = new Compiler(); |
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|
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// set import path directory the input filename resides |
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// otherwise @import statements will not find the files |
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// and will treat the @import line as css import |
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$scss->setImportPaths(dirname($filename)); |
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|
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$css = $scss->compile(file_get_contents($filename), $filename); |
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$elapsed = round((microtime(true) - $start), 4); |
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|
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$v = Version::VERSION; |
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$ts = date('r', $start); |
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$css = "/* compiled by scssphp $v on $ts (${elapsed}s) */\n\n" . $css; |
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|
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$imports = $scss->getParsedFiles(); |
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|
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$updated = 0; |
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foreach ($imports as $mtime) { |
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$updated = max($updated, $mtime); |
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} |
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|
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return array( |
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'elapsed' => $elapsed, // statistic, can be dropped |
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'updated' => $updated, |
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'content' => $css, |
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'files' => $imports, |
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); |
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} |
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} |
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|
