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✏️ Editing: ValidClassNameSniff.php

<?php
/**
 * Ensures classes are in camel caps, and the first letter is capitalised.
 *
 * @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\Sniff;
use PHP_CodeSniffer\Util\Common;
use PHP_CodeSniffer\Util\Tokens;

class ValidClassNameSniff implements Sniff
{

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

}//end register()

/**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The current file being processed.
     * @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 (isset($tokens[$stackPtr]['scope_opener']) === false) {
            $error = 'Possible parse error: %s missing opening or closing brace';
            $data  = [$tokens[$stackPtr]['content']];
            $phpcsFile->addWarning($error, $stackPtr, 'MissingBrace', $data);
            return;
        }

// Determine the name of the class or interface. Note that we cannot
        // simply look for the first T_STRING because a class name
        // starting with the number will be multiple tokens.
        $opener    = $tokens[$stackPtr]['scope_opener'];
        $nameStart = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), $opener, true);
        $nameEnd   = $phpcsFile->findNext((Tokens::$emptyTokens + [T_COLON => T_COLON]), $nameStart, $opener);
        if ($nameEnd === false) {
            $name = $tokens[$nameStart]['content'];
        } else {
            $name = trim($phpcsFile->getTokensAsString($nameStart, ($nameEnd - $nameStart)));
        }

// Check for PascalCase format.
        $valid = Common::isCamelCaps($name, true, true, false);
        if ($valid === false) {
            $type  = ucfirst($tokens[$stackPtr]['content']);
            $error = '%s name "%s" is not in PascalCase format';
            $data  = [
                $type,
                $name,
            ];
            $phpcsFile->addError($error, $nameStart, 'NotCamelCaps', $data);
            $phpcsFile->recordMetric($stackPtr, 'PascalCase class name', 'no');
        } else {
            $phpcsFile->recordMetric($stackPtr, 'PascalCase class name', 'yes');
        }

}//end process()

}//end class

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