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<?php |
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namespace Limonte; |
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class AdblockParser |
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{ |
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private $rules; |
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private $cacheFolder; |
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private $cacheExpire = 1; // 1 day |
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public function __construct($rules = []) |
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{ |
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$this->rules = []; |
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$this->addRules($rules); |
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} |
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/** |
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* @param string[] $rules |
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*/ |
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public function addRules($rules) |
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{ |
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foreach ($rules as $rule) { |
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try { |
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$this->rules[] = new AdblockRule($rule); |
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} catch (InvalidRuleException $e) { |
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// Skip invalid rules |
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} |
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} |
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// Sort rules, eceptions first |
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usort($this->rules, function ($a, $b) { |
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return (int)$a->isException() < (int)$b->isException(); |
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}); |
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} |
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/** |
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* @param string|array $path |
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*/ |
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public function loadRules($path) |
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{ |
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// single resource |
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if (is_string($path)) { |
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if (filter_var($path, FILTER_VALIDATE_URL)) { |
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$content = $this->getCachedResource($path); |
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} else { |
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$content = @file_get_contents($path); |
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} |
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if ($content) { |
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$rules = preg_split("/(\r\n|\n|\r)/", $content); |
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$this->addRules($rules); |
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} |
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// array of resources |
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} elseif (is_array($path)) { |
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foreach ($path as $item) { |
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$this->loadRules($item); |
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} |
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} |
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} |
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/** |
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* @return array |
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*/ |
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public function getRules() |
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{ |
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return $this->rules; |
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} |
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/** |
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* @param string $url |
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* |
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* @return integer |
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*/ |
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public function shouldBlock($url) |
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{ |
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$url = trim($url); |
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if (filter_var($url, FILTER_VALIDATE_URL) === false) { |
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throw new \Exception("Invalid URL"); |
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} |
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foreach ($this->rules as $rule) { |
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if ($rule->isComment() || $rule->isHtml()) { |
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continue; |
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} |
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if ($rule->matchUrl($url)) { |
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if ($rule->isException()) { |
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return false; |
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} |
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return true; |
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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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* @param string $url |
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* |
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* @return boolean |
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*/ |
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public function shouldNotBlock($url) |
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{ |
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return !$this->shouldBlock($url); |
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} |
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/** |
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* Get cache folder |
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* |
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* @return string |
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*/ |
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public function getCacheFolder() |
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{ |
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return $this->cacheFolder; |
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} |
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/** |
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* Set cache folder |
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* |
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* @param string $cacheFolder |
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*/ |
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public function setCacheFolder($cacheFolder) |
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{ |
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$this->cacheFolder = rtrim($cacheFolder, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR; |
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} |
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/** |
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* Get cache expire (in days) |
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* |
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* @return integer |
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*/ |
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public function getCacheExpire() |
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{ |
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return $this->cacheExpire; |
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} |
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/** |
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* Set cache expire (in days) |
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* |
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* @param integer $expireInDays |
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*/ |
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public function setCacheExpire($expireInDays) |
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{ |
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$this->cacheExpire = $expireInDays; |
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} |
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/** |
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* Clear external resources cache |
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*/ |
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public function clearCache() |
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{ |
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if ($this->cacheFolder) { |
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foreach (glob($this->cacheFolder . '*') as $file) { |
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unlink($file); |
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} |
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} |
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} |
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/** |
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* @param string $url |
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* |
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* @return string |
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*/ |
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2 |
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private function getCachedResource($url) |
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{ |
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if (!$this->cacheFolder) { |
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return @file_get_contents($url); |
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} |
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$cacheFile = $this->cacheFolder . basename($url) . md5($url); |
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if (file_exists($cacheFile) && (filemtime($cacheFile) > (time() - 60 * 24 * $this->cacheExpire))) { |
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// Cache file is less than five minutes old. |
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// Don't bother refreshing, just use the file as-is. |
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$content = @file_get_contents($cacheFile); |
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} else { |
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// Our cache is out-of-date, so load the data from our remote server, |
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// and also save it over our cache for next time. |
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$content = @file_get_contents($url); |
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file_put_contents($cacheFile, $content, LOCK_EX); |
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} |
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return $content; |
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} |
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} |
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limonte /
php-adblock-parser
