class PostStatementCommentSniff

class PostStatementCommentSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_COMMENT,
        ];
    }
    
    //end register()
    
    /**
     * Processes this sniff, 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 void
     */
    public function process(File $phpcsFile, $stackPtr) {
        $tokens = $phpcsFile->getTokens();
        if (substr($tokens[$stackPtr]['content'], 0, 2) !== '//') {
            return;
        }
        $commentLine = $tokens[$stackPtr]['line'];
        $lastContent = $phpcsFile->findPrevious(T_WHITESPACE, $stackPtr - 1, null, true);
        if ($tokens[$lastContent]['line'] !== $commentLine) {
            return;
        }
        if ($tokens[$lastContent]['code'] === T_CLOSE_CURLY_BRACKET) {
            return;
        }
        // Special case for JS files.
        if ($tokens[$lastContent]['code'] === T_COMMA || $tokens[$lastContent]['code'] === T_SEMICOLON) {
            $lastContent = $phpcsFile->findPrevious(T_WHITESPACE, $lastContent - 1, null, true);
            if ($tokens[$lastContent]['code'] === T_CLOSE_CURLY_BRACKET) {
                return;
            }
        }
        $error = 'Comments may not appear after statements';
        $fix = $phpcsFile->addFixableError($error, $stackPtr, 'Found');
        if ($fix === true) {
            if ($tokens[$lastContent]['code'] === T_OPEN_TAG) {
                $phpcsFile->fixer
                    ->addNewlineBefore($stackPtr);
                return;
            }
            $lineStart = $stackPtr;
            while ($tokens[$lineStart]['line'] === $tokens[$stackPtr]['line'] && $tokens[$lineStart]['code'] !== T_OPEN_TAG) {
                $lineStart--;
            }
            $phpcsFile->fixer
                ->beginChangeset();
            $phpcsFile->fixer
                ->addContent($lineStart, $tokens[$stackPtr]['content']);
            $phpcsFile->fixer
                ->replaceToken($stackPtr, $phpcsFile->eolChar);
            $phpcsFile->fixer
                ->endChangeset();
        }
    }
    
    //end process()

}