UselessLateStaticBindingSniff.php

<?php

declare (strict_types=1);
namespace SlevomatCodingStandard\Sniffs\Classes;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;
use SlevomatCodingStandard\Helpers\ClassHelper;
use SlevomatCodingStandard\Helpers\TokenHelper;
use function array_reverse;
use function in_array;
use const T_DOUBLE_COLON;
use const T_STATIC;
class UselessLateStaticBindingSniff implements Sniff {
    public const CODE_USELESS_LATE_STATIC_BINDING = 'UselessLateStaticBinding';
    
    /**
     * @return array<int, (int|string)>
     */
    public function register() : array {
        return [
            T_STATIC,
        ];
    }
    
    /**
     * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
     * @param int $staticPointer
     */
    public function process(File $phpcsFile, $staticPointer) : void {
        $tokens = $phpcsFile->getTokens();
        $doubleColonPointer = TokenHelper::findNextEffective($phpcsFile, $staticPointer + 1);
        if ($tokens[$doubleColonPointer]['code'] !== T_DOUBLE_COLON) {
            return;
        }
        $classPointer = null;
        foreach (array_reverse($tokens[$staticPointer]['conditions'], true) as $conditionPointer => $conditionTokenCode) {
            if (!in_array($conditionTokenCode, Tokens::$ooScopeTokens, true)) {
                continue;
            }
            $classPointer = $conditionPointer;
            break;
        }
        if (!ClassHelper::isFinal($phpcsFile, $classPointer)) {
            return;
        }
        $fix = $phpcsFile->addFixableError('Useless late static binding because class is final.', $staticPointer, self::CODE_USELESS_LATE_STATIC_BINDING);
        if (!$fix) {
            return;
        }
        $phpcsFile->fixer
            ->beginChangeset();
        $phpcsFile->fixer
            ->replaceToken($staticPointer, 'self');
        $phpcsFile->fixer
            ->endChangeset();
    }

}