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<?php |
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namespace Thunder\Shortcode\Parser; |
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use Thunder\Shortcode\Shortcode\ParsedShortcode; |
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use Thunder\Shortcode\Shortcode\Shortcode; |
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use Thunder\Shortcode\Syntax\Syntax; |
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use Thunder\Shortcode\Syntax\SyntaxInterface; |
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use Thunder\Shortcode\Utility\RegexBuilderUtility; |
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/** |
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* @author Tomasz Kowalczyk <[email protected]> |
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*/ |
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final class RegexParser implements ParserInterface |
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{ |
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/** @var SyntaxInterface */ |
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private $syntax; |
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private $shortcodeRegex; |
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private $singleShortcodeRegex; |
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private $parametersRegex; |
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public function __construct(SyntaxInterface $syntax = null) |
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{ |
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$this->syntax = $syntax ?: new Syntax(); |
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$this->shortcodeRegex = RegexBuilderUtility::buildShortcodeRegex($this->syntax); |
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$this->singleShortcodeRegex = RegexBuilderUtility::buildSingleShortcodeRegex($this->syntax); |
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$this->parametersRegex = RegexBuilderUtility::buildParametersRegex($this->syntax); |
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} |
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/** |
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* @param string $text |
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* |
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* @return ParsedShortcode[] |
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*/ |
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public function parse($text) |
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{ |
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preg_match_all($this->shortcodeRegex, $text, $matches, PREG_OFFSET_CAPTURE); |
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// loop instead of array_map to pass the arguments explicitly |
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$shortcodes = array(); |
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foreach($matches[0] as $match) { |
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$offset = mb_strlen(substr($text, 0, $match[1]), 'utf-8'); |
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$shortcodes[] = $this->parseSingle($match[0], $offset); |
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} |
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return array_filter($shortcodes); |
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} |
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private function parseSingle($text, $offset) |
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{ |
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preg_match($this->singleShortcodeRegex, $text, $matches, PREG_OFFSET_CAPTURE); |
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$name = $matches['name'][0]; |
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if(!preg_match('~^'.RegexBuilderUtility::buildNameRegex().'$~us', $name)) { |
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return null; |
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} |
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$parameters = isset($matches['parameters'][0]) ? $this->parseParameters($matches['parameters'][0]) : array(); |
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$bbCode = isset($matches['bbCode'][0]) && $matches['bbCode'][1] !== -1 |
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? $this->extractValue($matches['bbCode'][0]) |
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: null; |
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$content = isset($matches['content'][0]) && $matches['content'][1] !== -1 ? $matches['content'][0] : null; |
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return new ParsedShortcode(new Shortcode($name, $parameters, $content, $bbCode), $text, $offset); |
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} |
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private function parseParameters($text) |
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{ |
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preg_match_all($this->parametersRegex, $text, $argsMatches); |
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// loop because PHP 5.3 can't handle $this properly and I want separate methods |
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$return = array(); |
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foreach ($argsMatches[1] as $item) { |
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$parts = explode($this->syntax->getParameterValueSeparator(), $item, 2); |
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$return[trim($parts[0])] = $this->parseValue(isset($parts[1]) ? $parts[1] : null); |
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} |
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return $return; |
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} |
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private function parseValue($value) |
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{ |
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return null === $value ? null : $this->extractValue(trim($value)); |
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} |
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private function extractValue($value) |
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{ |
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$length = strlen($this->syntax->getParameterValueDelimiter()); |
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return $this->isDelimitedValue($value) ? substr($value, $length, -1 * $length) : $value; |
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} |
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private function isDelimitedValue($value) |
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{ |
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return preg_match('/^'.$this->syntax->getParameterValueDelimiter().'/us', $value) |
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&& preg_match('/'.$this->syntax->getParameterValueDelimiter().'$/us', $value); |
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} |
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} |
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thunderer /
Shortcode
