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<?php |
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declare(strict_types=1); |
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namespace ReliqArts\StyleImporter\HTML\Extractor; |
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use ReliqArts\StyleImporter\HTML\Extractor; |
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final class ElementExtractor implements Extractor |
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{ |
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private const PATTERN_CLASSES = '#\<\w[^<>]*\sclass=[\"\\\']([\w\s-]+)[\"\\\'][\s\>\/]#'; |
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private const PATTERN_IDS = '#\<\w[^<>]*\sid=[\"\\\']([\w-]+)[\"\\\'][\s\>\/]\>?#'; |
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private const PATTERN_TAGS = '#\<([\w-]+)[\s\>]#'; |
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/** |
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* @param string $html |
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* |
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* @return string[] |
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*/ |
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public function extractClasses(string $html): array |
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{ |
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$extractedClasses = $this->extractItemsByPattern($html, self::PATTERN_CLASSES); |
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$classNames = []; |
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foreach ($extractedClasses as $combinedClass) { |
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$splitClasses = array_map( |
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function (string $class): string { |
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return sprintf('.%s', $class); |
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}, |
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preg_split('/\s+/', $combinedClass) |
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); |
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array_push($classNames, ...$splitClasses); |
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} |
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return array_unique($classNames); |
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} |
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/** |
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* @param string $html |
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* |
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* @return string[] |
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*/ |
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public function extractIds(string $html): array |
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{ |
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$idNames = $this->extractItemsByPattern($html, self::PATTERN_IDS); |
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return array_map( |
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function (string $id): string { |
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return sprintf('#%s', $id); |
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}, |
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array_unique($idNames) |
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); |
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} |
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/** |
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* @param string $html |
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* |
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* @return string[] |
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*/ |
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public function extractTags(string $html): array |
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{ |
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return array_unique($this->extractItemsByPattern($html, self::PATTERN_TAGS)); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @param string $html |
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* |
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* @return array |
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*/ |
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public function extract(string $html): array |
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{ |
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return array_merge( |
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$this->extractTags($html), |
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$this->extractIds($html), |
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$this->extractClasses($html) |
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); |
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} |
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/** |
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* @param string $subject |
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* @param string $pattern |
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* |
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* @return array |
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*/ |
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private function extractItemsByPattern(string $subject, string $pattern): array |
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{ |
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$matchCount = preg_match_all($pattern, $subject, $matches); |
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if (empty($matchCount)) { |
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return []; |
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} |
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return $matches[1]; |
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} |
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} |
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