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Copy pathRegex.php
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125 lines (114 loc) · 3.59 KB
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Copy pathRegex.php
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125 lines (114 loc) · 3.59 KB
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<?php
namespace Dotenv\Regex;
use Dotenv\Result\Error;
use Dotenv\Result\Result;
use Dotenv\Result\Success;
class Regex
{
/**
* Perform a preg match, wrapping up the result.
*
* @param string $pattern
* @param string $subject
*
* @return \Dotenv\Result\Result<int,string>
*/
public static function match($pattern, $subject)
{
return self::pregAndWrap(function ($subject) use ($pattern) {
return (int) @preg_match($pattern, $subject);
}, $subject);
}
/**
* Perform a preg replace, wrapping up the result.
*
* @param string $pattern
* @param string $replacement
* @param string $subject
* @param int|null $limit
*
* @return \Dotenv\Result\Result<string,string>
*/
public static function replace($pattern, $replacement, $subject, $limit = null)
{
return self::pregAndWrap(function ($subject) use ($pattern, $replacement, $limit) {
return (string) @preg_replace($pattern, $replacement, $subject, $limit === null ? -1 : $limit);
}, $subject);
}
/**
* Perform a preg replace callback, wrapping up the result.
*
* @param string $pattern
* @param callable $callback
* @param string $subject
* @param int|null $limit
*
* @return \Dotenv\Result\Result<string,string>
*/
public static function replaceCallback($pattern, callable $callback, $subject, $limit = null)
{
return self::pregAndWrap(function ($subject) use ($pattern, $callback, $limit) {
return (string) @preg_replace_callback($pattern, $callback, $subject, $limit === null ? -1 : $limit);
}, $subject);
}
/**
* Perform a preg split, wrapping up the result.
*
* @param string $pattern
* @param string $subject
*
* @return \Dotenv\Result\Result<string[],string>
*/
public static function split($pattern, $subject)
{
return self::pregAndWrap(function ($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 \Dotenv\Result\Result<V,string>
*/
private static function pregAndWrap(callable $operation, $subject)
{
$result = $operation($subject);
if (($e = preg_last_error()) !== PREG_NO_ERROR) {
return Error::create(self::lookupError($e));
}
return Success::create($result);
}
/**
* Lookup the preg error code.
*
* @param int $code
*
* @return string
*/
private static function lookupError($code)
{
if (defined('PREG_JIT_STACKLIMIT_ERROR') && $code === PREG_JIT_STACKLIMIT_ERROR) {
return 'JIT stack limit exhausted';
}
switch ($code) {
case PREG_INTERNAL_ERROR:
return 'Internal error';
case PREG_BAD_UTF8_ERROR:
return 'Malformed UTF-8 characters, possibly incorrectly encoded';
case PREG_BAD_UTF8_OFFSET_ERROR:
return 'The offset did not correspond to the beginning of a valid UTF-8 code point';
case PREG_BACKTRACK_LIMIT_ERROR:
return 'Backtrack limit exhausted';
case PREG_RECURSION_LIMIT_ERROR:
return 'Recursion limit exhausted';
default:
return 'Unknown error';
}
}
}