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✏️ Editing: MethodDeclarationSniff.php

<?php
/**
 * Checks that the method declaration is correct.
 *
 * @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/HEAD/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\PSR2\Sniffs\Methods;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\AbstractScopeSniff;
use PHP_CodeSniffer\Util\Tokens;

class MethodDeclarationSniff extends AbstractScopeSniff
{

/**
     * Constructs a Squiz_Sniffs_Scope_MethodScopeSniff.
     */
    public function __construct()
    {
        parent::__construct(Tokens::$ooScopeTokens, [T_FUNCTION]);

}//end __construct()

/**
     * Processes the function tokens within the class.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param int                         $stackPtr  The position where the token was found.
     * @param int                         $currScope The current scope opener token.
     *
     * @return void
     */
    protected function processTokenWithinScope(File $phpcsFile, $stackPtr, $currScope)
    {
        $tokens = $phpcsFile->getTokens();

// Determine if this is a function which needs to be examined.
        $conditions = $tokens[$stackPtr]['conditions'];
        end($conditions);
        $deepestScope = key($conditions);
        if ($deepestScope !== $currScope) {
            return;
        }

$methodName = $phpcsFile->getDeclarationName($stackPtr);
        if ($methodName === null) {
            // Ignore closures.
            return;
        }

if ($methodName[0] === '_' && isset($methodName[1]) === true && $methodName[1] !== '_') {
            $error = 'Method name "%s" should not be prefixed with an underscore to indicate visibility';
            $data  = [$methodName];
            $phpcsFile->addWarning($error, $stackPtr, 'Underscore', $data);
        }

$visibility = 0;
        $static     = 0;
        $abstract   = 0;
        $final      = 0;

$find = (Tokens::$methodPrefixes + Tokens::$emptyTokens);
        $prev = $phpcsFile->findPrevious($find, ($stackPtr - 1), null, true);

$prefix = $stackPtr;
        while (($prefix = $phpcsFile->findPrevious(Tokens::$methodPrefixes, ($prefix - 1), $prev)) !== false) {
            switch ($tokens[$prefix]['code']) {
            case T_STATIC:
                $static = $prefix;
                break;
            case T_ABSTRACT:
                $abstract = $prefix;
                break;
            case T_FINAL:
                $final = $prefix;
                break;
            default:
                $visibility = $prefix;
                break;
            }
        }

$fixes = [];

if ($visibility !== 0 && $final > $visibility) {
            $error = 'The final declaration must precede the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $final, 'FinalAfterVisibility');
            if ($fix === true) {
                $fixes[$final]       = '';
                $fixes[($final + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] = 'final '.$fixes[$visibility];
                } else {
                    $fixes[$visibility] = 'final '.$tokens[$visibility]['content'];
                }
            }
        }

if ($visibility !== 0 && $abstract > $visibility) {
            $error = 'The abstract declaration must precede the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $abstract, 'AbstractAfterVisibility');
            if ($fix === true) {
                $fixes[$abstract]       = '';
                $fixes[($abstract + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] = 'abstract '.$fixes[$visibility];
                } else {
                    $fixes[$visibility] = 'abstract '.$tokens[$visibility]['content'];
                }
            }
        }

if ($static !== 0 && $static < $visibility) {
            $error = 'The static declaration must come after the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $static, 'StaticBeforeVisibility');
            if ($fix === true) {
                $fixes[$static]       = '';
                $fixes[($static + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] .= ' static';
                } else {
                    $fixes[$visibility] = $tokens[$visibility]['content'].' static';
                }
            }
        }

// Batch all the fixes together to reduce the possibility of conflicts.
        if (empty($fixes) === false) {
            $phpcsFile->fixer->beginChangeset();
            foreach ($fixes as $stackPtr => $content) {
                $phpcsFile->fixer->replaceToken($stackPtr, $content);
            }

$phpcsFile->fixer->endChangeset();
        }

}//end processTokenWithinScope()

/**
     * Processes a token that is found within the scope that this test is
     * listening to.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param int                         $stackPtr  The position in the stack where this
     *                                               token was found.
     *
     * @return void
     */
    protected function processTokenOutsideScope(File $phpcsFile, $stackPtr)
    {

}//end processTokenOutsideScope()

}//end class

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