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<?php
declare (strict_types=1);
namespace Rector\Php55;
use RectorPrefix20211231\Nette\Utils\Strings;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\BinaryOp\Concat;
use PhpParser\Node\Scalar\String_;
use Rector\Core\PhpParser\Node\Value\ValueResolver;
final class RegexMatcher
{
/**
* @var string
* @see https://regex101.com/r/Ok4wuE/1
*/
private const LAST_E_REGEX = '#(\\w+)?e(\\w+)?$#';
/**
* @var string
* @see https://regex101.com/r/2NWVwT/1
*/
private const LETTER_SUFFIX_REGEX = '#(?<modifiers>\\w+)$#';
/**
* @readonly
* @var \Rector\Core\PhpParser\Node\Value\ValueResolver
*/
private $valueResolver;
public function __construct(\Rector\Core\PhpParser\Node\Value\ValueResolver $valueResolver)
{
$this->valueResolver = $valueResolver;
}
public function resolvePatternExpressionWithoutEIfFound(\PhpParser\Node\Expr $expr) : ?\PhpParser\Node\Expr
{
if ($expr instanceof \PhpParser\Node\Scalar\String_) {
$pattern = $this->valueResolver->getValue($expr);
if (!\is_string($pattern)) {
return null;
}
$delimiter = $pattern[0];
/** @var string $modifiers */
$modifiers = \RectorPrefix20211231\Nette\Utils\Strings::after($pattern, $delimiter, -1);
if (\strpos($modifiers, 'e') === \false) {
return null;
}
$patternWithoutE = $this->createPatternWithoutE($pattern, $delimiter, $modifiers);
return new \PhpParser\Node\Scalar\String_($patternWithoutE);
}
if ($expr instanceof \PhpParser\Node\Expr\BinaryOp\Concat) {
return $this->matchConcat($expr);
}
return null;
}
private function createPatternWithoutE(string $pattern, string $delimiter, string $modifiers) : string
{
$modifiersWithoutE = \RectorPrefix20211231\Nette\Utils\Strings::replace($modifiers, '#e#', '');
return \RectorPrefix20211231\Nette\Utils\Strings::before($pattern, $delimiter, -1) . $delimiter . $modifiersWithoutE;
}
private function matchConcat(\PhpParser\Node\Expr\BinaryOp\Concat $concat) : ?\PhpParser\Node\Expr
{
$lastItem = $concat->right;
if (!$lastItem instanceof \PhpParser\Node\Scalar\String_) {
return null;
}
$matches = \RectorPrefix20211231\Nette\Utils\Strings::match($lastItem->value, self::LETTER_SUFFIX_REGEX);
if (!isset($matches['modifiers'])) {
return null;
}
if (\strpos($matches['modifiers'], 'e') === \false) {
return null;
}
// replace last "e" in the code
$lastItem->value = \RectorPrefix20211231\Nette\Utils\Strings::replace($lastItem->value, self::LAST_E_REGEX, '$1$2');
return $concat;
}
}
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