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✏️ Editing: DisallowSelfActionsSniff.php

<?php
/**
 * Ensures that self and static are not used to call public methods in action classes.
 *
 * @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
 *
 * @deprecated 3.9.0
 */

namespace PHP_CodeSniffer\Standards\MySource\Sniffs\Channels;

use PHP_CodeSniffer\Sniffs\DeprecatedSniff;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Util\Tokens;

class DisallowSelfActionsSniff implements Sniff, DeprecatedSniff
{

/**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register()
    {
        return [T_CLASS];

}//end register()

/**
     * Processes this sniff, 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();

// We are not interested in abstract classes.
        $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
        if ($prev !== false && $tokens[$prev]['code'] === T_ABSTRACT) {
            return;
        }

// We are only interested in Action classes.
        $classNameToken = $phpcsFile->findNext(T_WHITESPACE, ($stackPtr + 1), null, true);
        $className      = $tokens[$classNameToken]['content'];
        if (substr($className, -7) !== 'Actions') {
            return;
        }

$foundFunctions = [];
        $foundCalls     = [];

// Find all static method calls in the form self::method() in the class.
        $classEnd = $tokens[$stackPtr]['scope_closer'];
        for ($i = ($classNameToken + 1); $i < $classEnd; $i++) {
            if ($tokens[$i]['code'] !== T_DOUBLE_COLON) {
                if ($tokens[$i]['code'] === T_FUNCTION) {
                    // Cache the function information.
                    $funcName  = $phpcsFile->findNext(T_STRING, ($i + 1));
                    $funcScope = $phpcsFile->findPrevious(Tokens::$scopeModifiers, ($i - 1));

$foundFunctions[$tokens[$funcName]['content']] = strtolower($tokens[$funcScope]['content']);
                }

continue;
            }

$prevToken = $phpcsFile->findPrevious(T_WHITESPACE, ($i - 1), null, true);
            if ($tokens[$prevToken]['content'] !== 'self'
                && $tokens[$prevToken]['content'] !== 'static'
            ) {
                continue;
            }

$funcNameToken = $phpcsFile->findNext(T_WHITESPACE, ($i + 1), null, true);
            if ($tokens[$funcNameToken]['code'] === T_VARIABLE) {
                // We are only interested in function calls.
                continue;
            }

$funcName = $tokens[$funcNameToken]['content'];

// We've found the function, now we need to find it and see if it is
            // public, private or protected. If it starts with an underscore we
            // can assume it is private.
            if ($funcName[0] === '_') {
                continue;
            }

$foundCalls[$i] = [
                'name' => $funcName,
                'type' => strtolower($tokens[$prevToken]['content']),
            ];
        }//end for

$errorClassName = substr($className, 0, -7);

foreach ($foundCalls as $token => $funcData) {
            if (isset($foundFunctions[$funcData['name']]) === false) {
                // Function was not in this class, might have come from the parent.
                // Either way, we can't really check this.
                continue;
            } else if ($foundFunctions[$funcData['name']] === 'public') {
                $type  = $funcData['type'];
                $error = "Static calls to public methods in Action classes must not use the $type keyword; use %s::%s() instead";
                $data  = [
                    $errorClassName,
                    $funcName,
                ];
                $phpcsFile->addError($error, $token, 'Found'.ucfirst($funcData['type']), $data);
            }
        }

}//end process()

/**
     * Provide the version number in which the sniff was deprecated.
     *
     * @return string
     */
    public function getDeprecationVersion()
    {
        return 'v3.9.0';

}//end getDeprecationVersion()

/**
     * Provide the version number in which the sniff will be removed.
     *
     * @return string
     */
    public function getRemovalVersion()
    {
        return 'v4.0.0';

}//end getRemovalVersion()

/**
     * Provide a custom message to display with the deprecation.
     *
     * @return string
     */
    public function getDeprecationMessage()
    {
        return 'The MySource standard will be removed completely in v4.0.0.';

}//end getDeprecationMessage()

}//end class

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