<?php
/**
 * Checks that the closing braces of scopes are aligned correctly.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/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 ScopeClosingBraceSniff implements Sniff
{


    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array
     */
    public function register()
    {
        return Tokens::$scopeOpeners;

    }//end register()


    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile All the tokens found in the document.
     * @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 this is an inline condition (ie. there is no scope opener), then
        // return, as this is not a new scope.
        if (isset($tokens[$stackPtr]['scope_closer']) === false) {
            return;
        }

        // We need to actually find the first piece of content on this line,
        // as if this is a method with tokens before it (public, static etc)
        // or an if with an else before it, then we need to start the scope
        // checking from there, rather than the current token.
        $lineStart = $phpcsFile->findFirstOnLine([T_WHITESPACE, T_INLINE_HTML], $stackPtr, true);
        while ($tokens[$lineStart]['code'] === T_CONSTANT_ENCAPSED_STRING
            && $tokens[($lineStart - 1)]['code'] === T_CONSTANT_ENCAPSED_STRING
        ) {
            $lineStart = $phpcsFile->findFirstOnLine([T_WHITESPACE, T_INLINE_HTML], ($lineStart - 1), true);
        }

        $startColumn = $tokens[$lineStart]['column'];
        $scopeStart  = $tokens[$stackPtr]['scope_opener'];
        $scopeEnd    = $tokens[$stackPtr]['scope_closer'];

        // Check that the closing brace is on it's own line.
        $lastContent = $phpcsFile->findPrevious([T_INLINE_HTML, T_WHITESPACE, T_OPEN_TAG], ($scopeEnd - 1), $scopeStart, true);
        for ($lineStart = $scopeEnd; $tokens[$lineStart]['column'] > 1; $lineStart--);

        if ($tokens[$lastContent]['line'] === $tokens[$scopeEnd]['line']
            || ($tokens[$lineStart]['code'] === T_INLINE_HTML
            && trim($tokens[$lineStart]['content']) !== '')
        ) {
            $error = 'Closing brace must be on a line by itself';
            $fix   = $phpcsFile->addFixableError($error, $scopeEnd, 'ContentBefore');
            if ($fix === true) {
                if ($tokens[$lastContent]['line'] === $tokens[$scopeEnd]['line']) {
                    $phpcsFile->fixer->addNewlineBefore($scopeEnd);
                } else {
                    $phpcsFile->fixer->addNewlineBefore(($lineStart + 1));
                }
            }

            return;
        }

        // Check now that the closing brace is lined up correctly.
        $lineStart   = $phpcsFile->findFirstOnLine([T_WHITESPACE, T_INLINE_HTML], $scopeEnd, true);
        $braceIndent = $tokens[$lineStart]['column'];
        if ($tokens[$stackPtr]['code'] !== T_DEFAULT
            && $tokens[$stackPtr]['code'] !== T_CASE
            && $braceIndent !== $startColumn
        ) {
            $error = 'Closing brace indented incorrectly; expected %s spaces, found %s';
            $data  = [
                ($startColumn - 1),
                ($braceIndent - 1),
            ];

            $fix = $phpcsFile->addFixableError($error, $scopeEnd, 'Indent', $data);
            if ($fix === true) {
                $diff = ($startColumn - $braceIndent);
                if ($diff > 0) {
                    $phpcsFile->fixer->addContentBefore($lineStart, str_repeat(' ', $diff));
                } else {
                    $phpcsFile->fixer->substrToken(($lineStart - 1), 0, $diff);
                }
            }
        }//end if

    }//end process()


}//end class
