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<?php |
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namespace Seiler\Shortcoder; |
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class Shortcoder |
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{ |
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/** |
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* The shortcodes stack |
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* |
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* @var array |
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*/ |
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protected $shortcodes = []; |
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/** |
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* Create a new Shortcoder instance |
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* |
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* @param array|null|string $pattern |
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* @param null|string $replacement |
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* @param mixed $regex |
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*/ |
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public function __construct($pattern = null, $replacement = null, $regex = null) |
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{ |
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$this->set($pattern, $replacement, $regex); |
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} |
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/** |
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* Add shortcodes to the stack |
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* |
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* @param array|null|string $pattern |
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* @param null|string $replacement |
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* @param mixed $regex |
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* |
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* @return \Seiler\Shortcoder\Shortcoder |
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*/ |
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public function add($pattern = null, $replacement = null, $regex = null) |
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{ |
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// Called with arguments |
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if (!is_array($pattern)) { |
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$pattern = compact('pattern', 'replacement', 'regex'); |
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} |
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// Called with only one shortcode |
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if (!is_array(reset($pattern))) { |
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$pattern = [$pattern]; |
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} |
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foreach ($pattern as $attributes) { |
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$pattern = array_key_exists('pattern', $attributes) ? |
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$attributes['pattern'] : key($attributes); |
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if (empty($pattern)) { |
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continue; |
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} |
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$replacement = array_key_exists('replacement', $attributes) ? |
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$attributes['replacement'] : reset($attributes); |
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$regex = array_key_exists('regex', $attributes) ? |
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$attributes['regex'] : null; |
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$shortcode = [ |
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'pattern' => $this->formatPattern($pattern, $regex), |
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'replacement' => $this->formatReplacement($replacement, $regex) |
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]; |
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if (!in_array($shortcode, $this->shortcodes, true)) { |
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$this->shortcodes[] = $shortcode; |
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} |
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} |
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return $this; |
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} |
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/** |
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* Format the given pattern |
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* |
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* @param string $pattern |
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* @param mixed $regex |
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* |
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* @return string |
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*/ |
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protected function formatPattern($pattern, $regex = null) |
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{ |
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if (!empty($regex)) { |
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return $pattern; |
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} |
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$pattern = preg_quote($pattern, '/'); |
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$pattern = preg_replace([ |
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'/\\\\\*/', // 1 Replace all '*'... |
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'/\s+/', // 2 Replace all white-spaces... |
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'/(\(\.\*\?\))$/', // 3 Replace any closing lazy catch-all... |
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], [ |
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'(.*?)', // 1 ...with a lazy catch-all |
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'\s', // 2 ...with a 'white-space' regex pattern |
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'(.*)' // 3 ...with a greedy one |
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], $pattern); |
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return "/$pattern/s"; |
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} |
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/** |
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* Format the given replacement |
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* |
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* @param string $replacement |
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* @param mixed $regex |
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* |
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* @return string |
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*/ |
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protected function formatReplacement($replacement = '', $regex = null) |
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{ |
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if (!empty($regex)) { |
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return $replacement; |
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} |
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$backReferences = []; |
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if (preg_match_all('/\$(\d){1,2}/', $replacement, $matches)) { |
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$backReferences = $matches[1]; |
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} |
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while (strpos($replacement, '*') !== false) { |
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$index = 1; |
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while (in_array((string)$index, $backReferences, true)) { |
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$index++; |
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} |
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$backReferences[] = (string)$index; |
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$replacement = preg_replace('/\*/', '\$' . $index, $replacement, 1); |
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} |
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return $replacement; |
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} |
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/** |
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* Parse the given text with stacked shortcodes |
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* |
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* @param string $text |
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* |
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* @return string |
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*/ |
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public function parse($text = '') |
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{ |
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return preg_replace( |
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array_column($this->shortcodes, 'pattern'), |
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array_column($this->shortcodes, 'replacement'), |
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$text |
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); |
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} |
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/** |
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* Replace the stack with new shortcodes |
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* |
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* @param array|null|string $pattern |
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* @param null|string $replacement |
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* @param mixed $regex |
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* |
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* @return \Seiler\Shortcoder\Shortcoder |
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*/ |
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public function set($pattern = null, $replacement = null, $regex = null) |
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{ |
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return $this->flush()->add($pattern, $replacement, $regex); |
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} |
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/** |
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* Flush the stack |
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* |
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* @return \Seiler\Shortcoder\Shortcoder |
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*/ |
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public function flush() |
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{ |
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$this->shortcodes = []; |
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return $this; |
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} |
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} |
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fredericseiler /
shortcoder
