ClassNameResolver.php

<?php

namespace Symplify\CodingStandard\Fixer\Naming;

use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;
use SplFileInfo;

final class ClassNameResolver
{
    /**
     * @var array<string, string>
     */
    private array $classNameByFilePath = [];

    /**
     * @param Tokens<Token> $tokens
     */
    public function resolveClassName(SplFileInfo $splFileInfo, Tokens $tokens): ?string
    {
        $filePath = $splFileInfo->getRealPath();

        if (isset($this->classNameByFilePath[$filePath])) {
            return $this->classNameByFilePath[$filePath];
        }

        $classLikeName = $this->resolveFromTokens($tokens);
        if (! is_string($classLikeName)) {
            return null;
        }

        $this->classNameByFilePath[$filePath] = $classLikeName;

        return $classLikeName;
    }

    /**
     * @param Tokens<Token> $tokens
     */
    private function resolveFromTokens(Tokens $tokens): ?string
    {
        foreach ($tokens as $position => $token) {
            if (! $token->isGivenKind([T_CLASS, T_TRAIT, T_INTERFACE])) {
                continue;
            }

            $nextNextMeaningfulTokenIndex = $tokens->getNextMeaningfulToken($position + 1);

            if (null === $nextNextMeaningfulTokenIndex) {
                continue;
            }

            $nextNextMeaningfulToken = $tokens[$nextNextMeaningfulTokenIndex];

            // skip anonymous classes
            if (! $nextNextMeaningfulToken->isGivenKind(T_STRING)) {
                continue;
            }

            return $nextNextMeaningfulToken->getContent();
        }

        return null;
    }
}