class DisallowMultipleAttributesPerLineSniff

class DisallowMultipleAttributesPerLineSniff implements Sniff {
    public const CODE_DISALLOWED_MULTIPLE_ATTRIBUTES_PER_LINE = 'DisallowedMultipleAttributesPerLine';
    
    /**
     * @return array<int, (int|string)>
     */
    public function register() : array {
        return [
            T_ATTRIBUTE,
        ];
    }
    
    /**
     * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
     * @param int $attributeOpenerPointer
     */
    public function process(File $phpcsFile, $attributeOpenerPointer) : void {
        if (!AttributeHelper::isValidAttribute($phpcsFile, $attributeOpenerPointer)) {
            return;
        }
        $tokens = $phpcsFile->getTokens();
        $attributeCloserPointer = $tokens[$attributeOpenerPointer]['attribute_closer'];
        $nextAttributeOpenerPointer = TokenHelper::findNext($phpcsFile, T_ATTRIBUTE, $attributeCloserPointer + 1);
        if ($nextAttributeOpenerPointer === null) {
            return;
        }
        if ($tokens[$attributeCloserPointer]['line'] !== $tokens[$nextAttributeOpenerPointer]['line']) {
            return;
        }
        $attributeTargetPointer = AttributeHelper::getAttributeTarget($phpcsFile, $attributeOpenerPointer);
        $nextAttributeTargetPointer = AttributeHelper::getAttributeTarget($phpcsFile, $nextAttributeOpenerPointer);
        if ($attributeTargetPointer !== $nextAttributeTargetPointer) {
            return;
        }
        $fix = $phpcsFile->addFixableError('Multiple attributes per line are disallowed.', $nextAttributeOpenerPointer, self::CODE_DISALLOWED_MULTIPLE_ATTRIBUTES_PER_LINE);
        if (!$fix) {
            return;
        }
        $nonWhitespacePointerBefore = TokenHelper::findPreviousNonWhitespace($phpcsFile, $nextAttributeOpenerPointer - 1);
        $indentation = IndentationHelper::getIndentation($phpcsFile, TokenHelper::findFirstNonWhitespaceOnLine($phpcsFile, $attributeOpenerPointer));
        $phpcsFile->fixer
            ->beginChangeset();
        FixerHelper::removeBetween($phpcsFile, $nonWhitespacePointerBefore, $nextAttributeOpenerPointer);
        $phpcsFile->fixer
            ->addContentBefore($nextAttributeOpenerPointer, $phpcsFile->eolChar . $indentation);
        $phpcsFile->fixer
            ->endChangeset();
    }

}