class RequireAbstractOrFinalSniff

class RequireAbstractOrFinalSniff implements Sniff {
    public const CODE_NO_ABSTRACT_OR_FINAL = 'ClassNeitherAbstractNorFinal';
    
    /**
     * @return array<int, (int|string)>
     */
    public function register() : array {
        return [
            T_CLASS,
        ];
    }
    
    /**
     * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
     * @param int $classPointer
     */
    public function process(File $phpcsFile, $classPointer) : void {
        $tokens = $phpcsFile->getTokens();
        $previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $classPointer - 1);
        if ($tokens[$previousPointer]['code'] === T_READONLY) {
            $previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $previousPointer - 1);
        }
        if (in_array($tokens[$previousPointer]['code'], [
            T_ABSTRACT,
            T_FINAL,
        ], true)) {
            return;
        }
        $fix = $phpcsFile->addFixableError('All classes should be declared using either the "abstract" or "final" keyword.', $classPointer, self::CODE_NO_ABSTRACT_OR_FINAL);
        if (!$fix) {
            return;
        }
        $phpcsFile->fixer
            ->beginChangeset();
        $phpcsFile->fixer
            ->addContentBefore($classPointer, 'final ');
        $phpcsFile->fixer
            ->endChangeset();
    }

}