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1<?php
2namespace Apie\RegexValueObjects;
3
4use Apie\Core\Attributes\FakeMethod;
5use Apie\Core\ValueObjects\Interfaces\StringValueObjectInterface;
6use Apie\Core\ValueObjects\IsStringValueObject;
7use Apie\RegexValueObjects\Exceptions\ExpressionContainsLookAheads;
8use Apie\RegexValueObjects\Exceptions\ExpressionContainsRepeatsInRepeats;
9use Apie\RegexValueObjects\Exceptions\InvalidPhpRegularExpression;
10
11#[FakeMethod("createRandom")]
12final class PhpSafeRegularExpression implements StringValueObjectInterface
13{
14    use IsStringValueObject;
15    use SharedRegularExpression;
16
17    public static function validate(string $input): void
18    {
19        if (false === @preg_match($input, '')) {
20            throw new InvalidPhpRegularExpression($input, preg_last_error_msg());
21        }
22
23        // Check for lookaheads and lookbehinds
24        if (preg_match('/(?<!\w)[\(\[]\?[:=!<]|[\(\[]\?[:=!<](?!\w)/', $input)) {
25            throw new ExpressionContainsLookAheads($input);
26        }
27        // Check for nested repetitions
28        $repetition = '((\{\d*,\d*\})|\*|\+)'; // {\d,\d} or * or +
29        if (preg_match('/' . $repetition . '\)*' . $repetition . '/', $input)) {
30            throw new ExpressionContainsRepeatsInRepeats($input);
31        }
32    }
33}