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