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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Validator\Constraints;
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13
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14 use Symfony\Component\Validator\Constraint;
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15
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16 /**
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17 * @Annotation
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18 * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
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19 *
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20 * @author Bernhard Schussek <bschussek@gmail.com>
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21 */
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22 class Regex extends Constraint
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23 {
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24 const REGEX_FAILED_ERROR = 'de1e3db3-5ed4-4941-aae4-59f3667cc3a3';
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25
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26 protected static $errorNames = [
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27 self::REGEX_FAILED_ERROR => 'REGEX_FAILED_ERROR',
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28 ];
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29
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30 public $message = 'This value is not valid.';
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31 public $pattern;
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32 public $htmlPattern;
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33 public $match = true;
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34
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35 /**
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36 * {@inheritdoc}
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37 */
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38 public function getDefaultOption()
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39 {
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40 return 'pattern';
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41 }
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42
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43 /**
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44 * {@inheritdoc}
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45 */
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46 public function getRequiredOptions()
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47 {
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48 return ['pattern'];
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49 }
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50
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51 /**
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52 * Converts the htmlPattern to a suitable format for HTML5 pattern.
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53 * Example: /^[a-z]+$/ would be converted to [a-z]+
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54 * However, if options are specified, it cannot be converted.
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55 *
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56 * Pattern is also ignored if match=false since the pattern should
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57 * then be reversed before application.
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58 *
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59 * @see http://dev.w3.org/html5/spec/single-page.html#the-pattern-attribute
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60 *
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61 * @return string|null
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62 */
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63 public function getHtmlPattern()
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64 {
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65 // If htmlPattern is specified, use it
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66 if (null !== $this->htmlPattern) {
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67 return empty($this->htmlPattern)
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68 ? null
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69 : $this->htmlPattern;
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70 }
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71
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72 // Quit if delimiters not at very beginning/end (e.g. when options are passed)
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73 if ($this->pattern[0] !== $this->pattern[\strlen($this->pattern) - 1]) {
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74 return;
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75 }
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76
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77 $delimiter = $this->pattern[0];
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78
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79 // Unescape the delimiter
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80 $pattern = str_replace('\\'.$delimiter, $delimiter, substr($this->pattern, 1, -1));
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81
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82 // If the pattern is inverted, we can wrap it in
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83 // ((?!pattern).)*
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84 if (!$this->match) {
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85 return '((?!'.$pattern.').)*';
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86 }
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87
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88 // If the pattern contains an or statement, wrap the pattern in
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89 // .*(pattern).* and quit. Otherwise we'd need to parse the pattern
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90 if (false !== strpos($pattern, '|')) {
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91 return '.*('.$pattern.').*';
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92 }
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93
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94 // Trim leading ^, otherwise prepend .*
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95 $pattern = '^' === $pattern[0] ? substr($pattern, 1) : '.*'.$pattern;
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96
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97 // Trim trailing $, otherwise append .*
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98 $pattern = '$' === $pattern[\strlen($pattern) - 1] ? substr($pattern, 0, -1) : $pattern.'.*';
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99
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100 return $pattern;
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101 }
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102 }
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