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?? Editing: SelfMemberReferenceSniff.php

<?php
/**
 * Tests self member references.
 *
 * Verifies that :
 * - self:: is used instead of Self::
 * - self:: is used for local static member reference
 * - self:: is used instead of self ::
 *
 * @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\Squiz\Sniffs\Classes;

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

class SelfMemberReferenceSniff extends AbstractScopeSniff
{

/**
     * Constructs a Squiz_Sniffs_Classes_SelfMemberReferenceSniff.
     */
    public function __construct()
    {
        parent::__construct([T_CLASS], [T_DOUBLE_COLON]);

}//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 double colon which needs to be examined.
        $conditions = $tokens[$stackPtr]['conditions'];
        $conditions = array_reverse($conditions, true);
        foreach ($conditions as $conditionToken => $tokenCode) {
            if ($tokenCode === T_CLASS || $tokenCode === T_ANON_CLASS || $tokenCode === T_CLOSURE) {
                break;
            }
        }

if ($conditionToken !== $currScope) {
            return;
        }

$calledClassName = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
        if ($calledClassName === false) {
            // Parse error.
            return;
        }

if ($tokens[$calledClassName]['code'] === T_SELF) {
            if ($tokens[$calledClassName]['content'] !== 'self') {
                $error = 'Must use "self::" for local static member reference; found "%s::"';
                $data  = [$tokens[$calledClassName]['content']];
                $fix   = $phpcsFile->addFixableError($error, $calledClassName, 'IncorrectCase', $data);
                if ($fix === true) {
                    $phpcsFile->fixer->replaceToken($calledClassName, 'self');
                }

return;
            }
        } else if ($tokens[$calledClassName]['code'] === T_STRING) {
            // If the class is called with a namespace prefix, build fully qualified
            // namespace calls for both current scope class and requested class.
            $prevNonEmpty = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($calledClassName - 1), null, true);
            if ($prevNonEmpty !== false && $tokens[$prevNonEmpty]['code'] === T_NS_SEPARATOR) {
                $declarationName        = $this->getDeclarationNameWithNamespace($tokens, $calledClassName);
                $declarationName        = ltrim($declarationName, '\\');
                $fullQualifiedClassName = $this->getNamespaceOfScope($phpcsFile, $currScope);
                if ($fullQualifiedClassName === '\\') {
                    $fullQualifiedClassName = '';
                } else {
                    $fullQualifiedClassName .= '\\';
                }

$fullQualifiedClassName .= $phpcsFile->getDeclarationName($currScope);
            } else {
                $declarationName        = $phpcsFile->getDeclarationName($currScope);
                $fullQualifiedClassName = $tokens[$calledClassName]['content'];
            }

if ($declarationName === $fullQualifiedClassName) {
                // Class name is the same as the current class, which is not allowed.
                $error = 'Must use "self::" for local static member reference';
                $fix   = $phpcsFile->addFixableError($error, $calledClassName, 'NotUsed');

if ($fix === true) {
                    $phpcsFile->fixer->beginChangeset();

$currentPointer = ($stackPtr - 1);
                    while ($tokens[$currentPointer]['code'] === T_NS_SEPARATOR
                        || $tokens[$currentPointer]['code'] === T_STRING
                        || isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']]) === true
                    ) {
                        if (isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']]) === true) {
                            --$currentPointer;
                            continue;
                        }

$phpcsFile->fixer->replaceToken($currentPointer, '');
                        --$currentPointer;
                    }

$phpcsFile->fixer->replaceToken($stackPtr, 'self::');
                    $phpcsFile->fixer->endChangeset();

// Fix potential whitespace issues in the next loop.
                    return;
                }//end if
            }//end if
        }//end if

if ($tokens[($stackPtr - 1)]['code'] === T_WHITESPACE) {
            $found = $tokens[($stackPtr - 1)]['length'];
            $error = 'Expected 0 spaces before double colon; %s found';
            $data  = [$found];
            $fix   = $phpcsFile->addFixableError($error, ($stackPtr - 1), 'SpaceBefore', $data);

if ($fix === true) {
                $phpcsFile->fixer->beginChangeset();

for ($i = ($stackPtr - 1); $tokens[$i]['code'] === T_WHITESPACE; $i--) {
                    $phpcsFile->fixer->replaceToken($i, '');
                }

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

if ($tokens[($stackPtr + 1)]['code'] === T_WHITESPACE) {
            $found = $tokens[($stackPtr + 1)]['length'];
            $error = 'Expected 0 spaces after double colon; %s found';
            $data  = [$found];
            $fix   = $phpcsFile->addFixableError($error, ($stackPtr - 1), 'SpaceAfter', $data);

if ($fix === true) {
                $phpcsFile->fixer->beginChangeset();

for ($i = ($stackPtr + 1); $tokens[$i]['code'] === T_WHITESPACE; $i++) {
                    $phpcsFile->fixer->replaceToken($i, '');
                }

$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()

/**
     * Returns the declaration names for classes/interfaces/functions with a namespace.
     *
     * @param array $tokens   Token stack for this file.
     * @param int   $stackPtr The position where the namespace building will start.
     *
     * @return string
     */
    protected function getDeclarationNameWithNamespace(array $tokens, $stackPtr)
    {
        $nameParts      = [];
        $currentPointer = $stackPtr;
        while ($tokens[$currentPointer]['code'] === T_NS_SEPARATOR
            || $tokens[$currentPointer]['code'] === T_STRING
            || isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']]) === true
        ) {
            if (isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']]) === true) {
                --$currentPointer;
                continue;
            }

$nameParts[] = $tokens[$currentPointer]['content'];
            --$currentPointer;
        }

$nameParts = array_reverse($nameParts);
        return implode('', $nameParts);

}//end getDeclarationNameWithNamespace()

/**
     * Returns the namespace declaration of a file.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param int                         $stackPtr  The position where the search for the
     *                                               namespace declaration will start.
     *
     * @return string
     */
    protected function getNamespaceOfScope(File $phpcsFile, $stackPtr)
    {
        $namespace = '\\';
        $tokens    = $phpcsFile->getTokens();

while (($namespaceDeclaration = $phpcsFile->findPrevious(T_NAMESPACE, $stackPtr)) !== false) {
            $nextNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, ($namespaceDeclaration + 1), null, true);
            if ($tokens[$nextNonEmpty]['code'] === T_NS_SEPARATOR) {
                // Namespace operator. Ignore.
                $stackPtr = ($namespaceDeclaration - 1);
                continue;
            }

$endOfNamespaceDeclaration = $phpcsFile->findNext([T_SEMICOLON, T_OPEN_CURLY_BRACKET, T_CLOSE_TAG], $namespaceDeclaration);
            $namespace = $this->getDeclarationNameWithNamespace(
                $phpcsFile->getTokens(),
                ($endOfNamespaceDeclaration - 1)
            );
            break;
        }

return $namespace;

}//end getNamespaceOfScope()

}//end class

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?? Editing: SelfMemberReferenceSniff.php

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