class ClassFileNameSniff

class ClassFileNameSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_CLASS,
            T_INTERFACE,
            T_TRAIT,
            T_ENUM,
        ];
    }
    
    //end register()
    
    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
     * @param int                         $stackPtr  The position of the current token in
     *                                               the stack passed in $tokens.
     *
     * @return int
     */
    public function process(File $phpcsFile, $stackPtr) {
        // This check only applies to Drupal 8+, in Drupal 7 we can have classes
        // in all kinds of files.
        if (Project::getCoreVersion($phpcsFile) < 8) {
            return $phpcsFile->numTokens + 1;
        }
        $fullPath = basename($phpcsFile->getFilename());
        $fileName = substr($fullPath, 0, strrpos($fullPath, '.'));
        if ($fileName === '') {
            // No filename probably means STDIN, so we can't do this check.
            return $phpcsFile->numTokens + 1;
        }
        // If the file is not a php file, we do not care about how it looks,
        // since we care about psr-4.
        $extension = pathinfo($fullPath, PATHINFO_EXTENSION);
        if ($extension !== 'php') {
            return $phpcsFile->numTokens + 1;
        }
        $tokens = $phpcsFile->getTokens();
        $decName = $phpcsFile->findNext(Tokens::$emptyTokens, $stackPtr + 1, null, true);
        if ($tokens[$decName]['code'] === T_STRING && $tokens[$decName]['content'] !== $fileName) {
            $error = '%s name doesn\'t match filename; expected "%s %s"';
            $data = [
                ucfirst($tokens[$stackPtr]['content']),
                $tokens[$stackPtr]['content'],
                $fileName,
            ];
            $phpcsFile->addError($error, $stackPtr, 'NoMatch', $data);
        }
        // Only check the first class in a file, we don't care about helper
        // classes in tests for example.
        return $phpcsFile->numTokens + 1;
    }
    
    //end process()

}