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<?php |
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/** |
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* Created by Vitaly Iegorov <[email protected]>. |
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* on 07.07.16 at 18:19 |
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*/ |
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namespace samsonphp\resource; |
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use samsonphp\resource\exception\ResourceNotFound; |
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/** |
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* CSS assets handling class |
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* |
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* @author Vitaly Iegorov <[email protected]> |
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* @package samsonphp\resource |
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*/ |
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class CSS |
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{ |
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/** Pattern for matching CSS url */ |
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const P_URL = '/url\s*\(\s*(\'|\")?([^\)\s\'\"]+)(\'|\")?\s*\)/i'; |
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/** @var string Path to current resource file */ |
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protected $currentResource; |
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/** |
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* LESS resource compiler. |
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* |
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* @param string $resource Resource full path |
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* @param string $extension Resource extension |
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* @param string $content Compiled output resource content |
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*/ |
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public function compile($resource, $extension, &$content) |
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{ |
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if ($extension === 'css') { |
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$this->currentResource = $resource; |
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// Rewrite Urls |
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$content = preg_replace_callback(self::P_URL, [$this, 'rewriteUrls'], $content); |
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} |
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} |
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/** |
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* Callback for CSS url(...) rewriting. |
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* |
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* @param array $matches Regular expression matches collection |
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* |
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* @return string Rewritten url(..) with static resource handler url |
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* @throws ResourceNotFound |
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*/ |
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public function rewriteUrls($matches) |
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{ |
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// Store static resource path |
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$url = $matches[2]; |
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if (strpos($url, 'data:') === false) { |
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// Remove possible GET parameters from resource path |
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$url = $this->getOnlyUrl($url, '?'); |
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// Remove possible HASH parameters from resource path |
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$url = $this->getOnlyUrl($url, '#'); |
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// Try to find resource and output full error |
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try { |
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$path = ResourceValidator::getProjectRelativePath($url, dirname($this->currentResource)); |
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} catch (ResourceNotFound $e) { |
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throw new ResourceNotFound('Cannot find resource "' . $url . '" in "' . $this->currentResource . '"'); |
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} |
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// Build path to static resource handler |
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return 'url("/' . STATIC_RESOURCE_HANDLER . '/?p=' . $path . '")'; |
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} |
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return $matches[0]; |
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} |
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/** |
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* Get only path or URL before marker. |
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* |
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* @param string $path Full URL with possible unneeded data |
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* @param string $marker Marker for separation |
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* |
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* @return string Filtered asset URL |
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*/ |
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protected function getOnlyUrl($path, $marker) |
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{ |
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// Remove possible GET parameters from resource path |
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if (($getStart = strpos($path, $marker)) !== false) { |
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return substr($path, 0, $getStart); |
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} |
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return $path; |
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} |
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} |
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SamsonPHP /
resource
