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<?php |
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namespace Maiorano\Shortcodes\Parsers; |
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use Closure; |
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use Generator; |
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/** |
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* Class DefaultParser. |
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*/ |
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class DefaultParser implements ParserInterface |
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{ |
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/** |
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* @param string $content |
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* @param array $tags |
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* @param Closure|null $callback |
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* |
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* @return array|string|string[]|null |
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*/ |
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public function parseShortcode(string $content, array $tags, Closure $callback = null) |
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{ |
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if (strpos($content, '[') === false && empty($tags)) { |
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return is_null($callback) ? [] : $content; |
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} |
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$regex = $this->getRegex($tags); |
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preg_match_all("/$regex/", $content, $matches, PREG_SET_ORDER); |
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if (is_null($callback)) { |
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return iterator_to_array($this->generateResults($matches)); |
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} |
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return preg_replace_callback("/$regex/", function ($match) use ($callback) { |
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if ($match[1] == '[' && $match[6] == ']') { |
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return substr($match[0], 1, -1); |
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} |
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$content = isset($match[5]) ? $match[5] : null; |
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$atts = isset($match[3]) ? $this->parseAttributes($match[3]) : []; |
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return $callback($match[2], $content, $atts); |
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}, $content); |
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} |
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/** |
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* @param array $tags |
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* |
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* @return string |
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* |
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* @see https://core.trac.wordpress.org/browser/tags/4.9/src/wp-includes/shortcodes.php#L228 |
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*/ |
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private function getRegex(array $tags): string |
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{ |
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$tagregexp = implode('|', array_map('preg_quote', $tags)); |
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return |
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'\\[' // Opening bracket |
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.'(\\[?)' // 1: Optional second opening bracket for escaping shortcodes: [[tag]] |
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."($tagregexp)" // 2: Shortcode name |
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.'(?![\\w-])' // Not followed by word character or hyphen |
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.'(' // 3: Unroll the loop: Inside the opening shortcode tag |
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.'[^\\]\\/]*' // Not a closing bracket or forward slash |
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.'(?:' |
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.'\\/(?!\\])' // A forward slash not followed by a closing bracket |
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.'[^\\]\\/]*' // Not a closing bracket or forward slash |
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.')*?' |
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.')' |
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.'(?:' |
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.'(\\/)' // 4: Self closing tag ... |
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.'\\]' // ... and closing bracket |
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.'|' |
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.'\\]' // Closing bracket |
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.'(?:' |
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.'(' // 5: Unroll the loop: Optionally, anything between the opening and closing shortcode tags |
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.'[^\\[]*+' // Not an opening bracket |
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.'(?:' |
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.'\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag |
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.'[^\\[]*+' // Not an opening bracket |
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.')*+' |
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.')' |
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.'\\[\\/\\2\\]' // Closing shortcode tag |
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.')?' |
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.')' |
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.'(\\]?)'; // 6: Optional second closing brocket for escaping shortcodes: [[tag]] |
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} |
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/** |
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* @param string $text |
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* |
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* @return array |
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* |
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* @see https://core.trac.wordpress.org/browser/tags/4.9/src/wp-includes/shortcodes.php#L482 |
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*/ |
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public function parseAttributes(string $text): array |
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{ |
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$atts = []; |
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$patterns = implode('|', [ |
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'([\w-]+)\s*=\s*"([^"]*)"(?:\s|$)', // attribute="value" |
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'([\w-]+)\s*=\s*\'([^\']*)\'(?:\s|$)', // attribute='value' |
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'([\w-]+)\s*=\s*([^\s\'"]+)(?:\s|$)', // attribute=value |
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'"([^"]*)"(?:\s|$)', // "attribute" |
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'\'([^\']*)\'(?:\s|$)', // 'attribute' |
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'(\S+)(?:\s|$)', // attribute |
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]); |
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$pattern = "/{$patterns}/"; |
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$text = preg_replace("/[\x{00a0}\x{200b}]+/u", ' ', $text); |
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if (preg_match_all($pattern, (string) $text, $match, PREG_SET_ORDER)) { |
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// Reject any unclosed HTML elements |
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foreach($this->generateAttributes($match) as $att => $value){ |
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if (strpos($value, '<') !== false) { |
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if (preg_match('/^[^<]*+(?:<[^>]*+>[^<]*+)*+$/', $value) !== 1) { |
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$value = ''; |
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} |
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} |
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$atts[$att] = $value; |
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} |
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} |
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return $atts; |
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} |
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/** |
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* @param array $matches |
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* |
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* @return Generator |
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*/ |
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private function generateAttributes(array $matches): Generator |
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{ |
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foreach ($matches as $m) { |
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if (!empty($m[1])) { |
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yield strtolower($m[1]) => stripcslashes($m[2]); |
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} elseif (!empty($m[3])) { |
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yield strtolower($m[3]) => stripcslashes($m[4]); |
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} elseif (!empty($m[5])) { |
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yield strtolower($m[5]) => stripcslashes($m[6]); |
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} elseif (isset($m[7]) && strlen($m[7])) { |
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yield strtolower($m[7]) => true; |
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} elseif (isset($m[8]) && strlen($m[8])) { |
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yield strtolower($m[8]) => true; |
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} elseif (isset($m[9])) { |
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yield strtolower($m[9]) => true; |
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} |
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} |
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} |
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/** |
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* @param array $matches |
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* |
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* @return Generator |
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*/ |
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1 |
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private function generateResults(array $matches): Generator |
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{ |
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foreach ($matches as $match) { |
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if ($match[1] == '[' && $match[6] == ']') { |
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continue; |
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} |
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yield [ |
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'tag' => $match[2], |
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'content' => isset($match[5]) ? $match[5] : null, |
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'attributes' => isset($match[3]) ? $this->parseAttributes($match[3]) : [], |
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]; |
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} |
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} |
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} |
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maiorano84 /
shortcodes
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