<?php

/**
 * Ensure there is no whitespace before a semicolon.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */
namespace PHP_CodeSniffer\Standards\Squiz\Sniffs\WhiteSpace;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;
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()
}
//end class
