class SemicolonSpacingSniff

class SemicolonSpacingSniff implements Sniff {
    
    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = [
        'PHP',
        'JS',
    ];
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_SEMICOLON,
        ];
    }
    
    //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 void
     */
    public function process(File $phpcsFile, $stackPtr) {
        $tokens = $phpcsFile->getTokens();
        $prevType = $tokens[$stackPtr - 1]['code'];
        if (isset(Tokens::$emptyTokens[$prevType]) === false) {
            return;
        }
        $nonSpace = $phpcsFile->findPrevious(Tokens::$emptyTokens, $stackPtr - 2, null, true);
        // Detect whether this is a semicolon for a condition in a `for()` control structure.
        $forCondition = false;
        if (isset($tokens[$stackPtr]['nested_parenthesis']) === true) {
            $nestedParens = $tokens[$stackPtr]['nested_parenthesis'];
            $closeParenthesis = end($nestedParens);
            if (isset($tokens[$closeParenthesis]['parenthesis_owner']) === true) {
                $owner = $tokens[$closeParenthesis]['parenthesis_owner'];
                if ($tokens[$owner]['code'] === T_FOR) {
                    $forCondition = true;
                    $nonSpace = $phpcsFile->findPrevious(T_WHITESPACE, $stackPtr - 2, null, true);
                }
            }
        }
        if ($tokens[$nonSpace]['code'] === T_SEMICOLON || $forCondition === true && $nonSpace === $tokens[$owner]['parenthesis_opener'] || isset($tokens[$nonSpace]['scope_opener']) === true && $tokens[$nonSpace]['scope_opener'] === $nonSpace) {
            // Empty statement.
            return;
        }
        $expected = $tokens[$nonSpace]['content'] . ';';
        $found = $phpcsFile->getTokensAsString($nonSpace, $stackPtr - $nonSpace) . ';';
        $found = str_replace("\n", '\\n', $found);
        $found = str_replace("\r", '\\r', $found);
        $found = str_replace("\t", '\\t', $found);
        $error = 'Space found before semicolon; expected "%s" but found "%s"';
        $data = [
            $expected,
            $found,
        ];
        $fix = $phpcsFile->addFixableError($error, $stackPtr, 'Incorrect', $data);
        if ($fix === true) {
            $phpcsFile->fixer
                ->beginChangeset();
            $i = $stackPtr - 1;
            while ($tokens[$i]['code'] === T_WHITESPACE && $i > $nonSpace) {
                $phpcsFile->fixer
                    ->replaceToken($i, '');
                $i--;
            }
            $phpcsFile->fixer
                ->addContent($nonSpace, ';');
            $phpcsFile->fixer
                ->replaceToken($stackPtr, '');
            $phpcsFile->fixer
                ->endChangeset();
        }
    }
    
    //end process()

}