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<?php
declare(strict_types=1);
namespace Dotenv\Util;
use GrahamCampbell\ResultType\Error;
use GrahamCampbell\ResultType\Success;
/**
* @internal
*/
final class Regex
{
/**
* This class is a singleton.
*
* @codeCoverageIgnore
*
* @return void
*/
private function __construct()
{
//
}
/**
* Perform a preg match, wrapping up the result.
*
* @param string $pattern
* @param string $subject
*
* @return \GrahamCampbell\ResultType\Result<bool,string>
*/
public static function matches(string $pattern, string $subject)
{
return self::pregAndWrap(static function (string $subject) use ($pattern) {
return @\preg_match($pattern, $subject) === 1;
}, $subject);
}
/**
* Perform a preg match all, wrapping up the result.
*
* @param string $pattern
* @param string $subject
*
* @return \GrahamCampbell\ResultType\Result<int,string>
*/
public static function occurrences(string $pattern, string $subject)
{
return self::pregAndWrap(static function (string $subject) use ($pattern) {
return (int) @\preg_match_all($pattern, $subject);
}, $subject);
}
/**
* Perform a preg replace callback, wrapping up the result.
*
* @param string $pattern
* @param callable $callback
* @param string $subject
* @param int|null $limit
*
* @return \GrahamCampbell\ResultType\Result<string,string>
*/
public static function replaceCallback(string $pattern, callable $callback, string $subject, int $limit = null)
{
return self::pregAndWrap(static function (string $subject) use ($pattern, $callback, $limit) {
return (string) @\preg_replace_callback($pattern, $callback, $subject, $limit ?? -1);
}, $subject);
}
/**
* Perform a preg split, wrapping up the result.
*
* @param string $pattern
* @param string $subject
*
* @return \GrahamCampbell\ResultType\Result<string[],string>
*/
public static function split(string $pattern, string $subject)
{
return self::pregAndWrap(static function (string $subject) use ($pattern) {
/** @var string[] */
return (array) @\preg_split($pattern, $subject);
}, $subject);
}
/**
* Perform a preg operation, wrapping up the result.
*
* @template V
*
* @param callable(string):V $operation
* @param string $subject
*
* @return \GrahamCampbell\ResultType\Result<V,string>
*/
private static function pregAndWrap(callable $operation, string $subject)
{
$result = $operation($subject);
if (\preg_last_error() !== \PREG_NO_ERROR) {
/** @var \GrahamCampbell\ResultType\Result<V,string> */
return Error::create(\preg_last_error_msg());
}
/** @var \GrahamCampbell\ResultType\Result<V,string> */
return Success::create($result);
}
}