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Regex.php
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113 lines (95 loc) · 3.91 KB
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\InvalidArgumentException;
use Symfony\Component\Validator\Exception\MissingOptionsException;
/**
* Validates that a value matches a regular expression.
*
* @author Bernhard Schussek <[email protected]>
*/
#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
class Regex extends Constraint
{
public const REGEX_FAILED_ERROR = 'de1e3db3-5ed4-4941-aae4-59f3667cc3a3';
protected const ERROR_NAMES = [
self::REGEX_FAILED_ERROR => 'REGEX_FAILED_ERROR',
];
public string $message = 'This value is not valid.';
public ?string $pattern = null;
public ?string $htmlPattern = null;
public bool $match = true;
/** @var callable|null */
public $normalizer;
/**
* @param string|null $pattern The regular expression to match
* @param string|null $htmlPattern The pattern to use in the HTML5 pattern attribute
* @param bool|null $match Whether to validate the value matches the configured pattern or not (defaults to true)
* @param string[]|null $groups
*/
public function __construct(
?string $pattern,
?string $message = null,
?string $htmlPattern = null,
?bool $match = null,
?callable $normalizer = null,
?array $groups = null,
mixed $payload = null,
) {
if (null === $pattern) {
throw new MissingOptionsException(\sprintf('The options "pattern" must be set for constraint "%s".', self::class), ['pattern']);
}
parent::__construct(null, $groups, $payload);
$this->pattern = $pattern;
$this->message = $message ?? $this->message;
$this->htmlPattern = $htmlPattern;
$this->match = $match ?? $this->match;
$this->normalizer = $normalizer;
if (null !== $this->normalizer && !\is_callable($this->normalizer)) {
throw new InvalidArgumentException(\sprintf('The "normalizer" option must be a valid callable ("%s" given).', get_debug_type($this->normalizer)));
}
}
/**
* Converts the htmlPattern to a suitable format for HTML5 pattern.
* Example: /^[a-z]+$/ would be converted to [a-z]+
* However, if options are specified, it cannot be converted.
*
* @see http://dev.w3.org/html5/spec/single-page.html#the-pattern-attribute
*/
public function getHtmlPattern(): ?string
{
// If htmlPattern is specified, use it
if (null !== $this->htmlPattern) {
return $this->htmlPattern ?: null;
}
// Quit if delimiters not at very beginning/end (e.g. when options are passed)
if ($this->pattern[0] !== $this->pattern[\strlen($this->pattern) - 1]) {
return null;
}
$delimiter = $this->pattern[0];
// Unescape the delimiter
$pattern = str_replace('\\'.$delimiter, $delimiter, substr($this->pattern, 1, -1));
// If the pattern is inverted, we can wrap it in
// ((?!pattern).)*
if (!$this->match) {
return '((?!'.$pattern.').)*';
}
// If the pattern contains an or statement, wrap the pattern in
// .*(pattern).* and quit. Otherwise we'd need to parse the pattern
if (str_contains($pattern, '|')) {
return '.*('.$pattern.').*';
}
// Trim leading ^, otherwise prepend .*
$pattern = '^' === $pattern[0] ? substr($pattern, 1) : '.*'.$pattern;
// Trim trailing $, otherwise append .*
return '$' === $pattern[\strlen($pattern) - 1] ? substr($pattern, 0, -1) : $pattern.'.*';
}
}