Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Validator\Constraints;
Chris@0: 
Chris@0: use Symfony\Component\Validator\Constraint;
Chris@0: 
Chris@0: /**
Chris@0:  * @Annotation
Chris@0:  * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
Chris@0:  *
Chris@0:  * @author Bernhard Schussek <bschussek@gmail.com>
Chris@0:  */
Chris@0: class Regex extends Constraint
Chris@0: {
Chris@0:     const REGEX_FAILED_ERROR = 'de1e3db3-5ed4-4941-aae4-59f3667cc3a3';
Chris@0: 
Chris@17:     protected static $errorNames = [
Chris@0:         self::REGEX_FAILED_ERROR => 'REGEX_FAILED_ERROR',
Chris@17:     ];
Chris@0: 
Chris@0:     public $message = 'This value is not valid.';
Chris@0:     public $pattern;
Chris@0:     public $htmlPattern;
Chris@0:     public $match = true;
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getDefaultOption()
Chris@0:     {
Chris@0:         return 'pattern';
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getRequiredOptions()
Chris@0:     {
Chris@17:         return ['pattern'];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Converts the htmlPattern to a suitable format for HTML5 pattern.
Chris@0:      * Example: /^[a-z]+$/ would be converted to [a-z]+
Chris@0:      * However, if options are specified, it cannot be converted.
Chris@0:      *
Chris@0:      * Pattern is also ignored if match=false since the pattern should
Chris@0:      * then be reversed before application.
Chris@0:      *
Chris@0:      * @see http://dev.w3.org/html5/spec/single-page.html#the-pattern-attribute
Chris@0:      *
Chris@0:      * @return string|null
Chris@0:      */
Chris@0:     public function getHtmlPattern()
Chris@0:     {
Chris@0:         // If htmlPattern is specified, use it
Chris@0:         if (null !== $this->htmlPattern) {
Chris@0:             return empty($this->htmlPattern)
Chris@0:                 ? null
Chris@0:                 : $this->htmlPattern;
Chris@0:         }
Chris@0: 
Chris@0:         // Quit if delimiters not at very beginning/end (e.g. when options are passed)
Chris@17:         if ($this->pattern[0] !== $this->pattern[\strlen($this->pattern) - 1]) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         $delimiter = $this->pattern[0];
Chris@0: 
Chris@0:         // Unescape the delimiter
Chris@0:         $pattern = str_replace('\\'.$delimiter, $delimiter, substr($this->pattern, 1, -1));
Chris@0: 
Chris@18:         // If the pattern is inverted, we can wrap it in
Chris@0:         // ((?!pattern).)*
Chris@0:         if (!$this->match) {
Chris@0:             return '((?!'.$pattern.').)*';
Chris@0:         }
Chris@0: 
Chris@0:         // If the pattern contains an or statement, wrap the pattern in
Chris@0:         // .*(pattern).* and quit. Otherwise we'd need to parse the pattern
Chris@0:         if (false !== strpos($pattern, '|')) {
Chris@0:             return '.*('.$pattern.').*';
Chris@0:         }
Chris@0: 
Chris@0:         // Trim leading ^, otherwise prepend .*
Chris@0:         $pattern = '^' === $pattern[0] ? substr($pattern, 1) : '.*'.$pattern;
Chris@0: 
Chris@0:         // Trim trailing $, otherwise append .*
Chris@17:         $pattern = '$' === $pattern[\strlen($pattern) - 1] ? substr($pattern, 0, -1) : $pattern.'.*';
Chris@0: 
Chris@0:         return $pattern;
Chris@0:     }
Chris@0: }