multiplefieldassembler.php

<?php
 
namespace Bitrix\Iblock\Grid\Row\Assembler\Property;
 
use Bitrix\Main;
use Bitrix\Iblock\Grid\Column\ElementPropertyProvider;
use Bitrix\Iblock\PropertyTable;
use Bitrix\Main\Grid\Row\FieldAssembler;
 
final class MultipleFieldAssembler extends FieldAssembler
{
    private int $iblockId;
 
    public function __construct(int $iblockId, array $excludeColumnsIds)
    {
        $this->iblockId = $iblockId;
 
        parent::__construct(
            $this->getPropertyColumnsIds($excludeColumnsIds)
        );
    }
 
    private function getPropertyColumnsIds(array $excludeColumnsIds): array
    {
        $result = [];
 
        $rows = PropertyTable::getList([
            'select' => [
                'ID',
            ],
            'filter' => [
                '=IBLOCK_ID' => $this->iblockId,
                '=MULTIPLE' => 'Y',
                'USER_TYPE' => null,
            ],
        ]);
        foreach ($rows as $row)
        {
            $columnId = ElementPropertyProvider::getColumnIdByPropertyId((int)$row['ID']);
            if (!in_array($columnId, $excludeColumnsIds, true))
            {
                $result[] = $columnId;
            }
        }
 
        return $result;
    }
 
    protected function prepareRow(array $row): array
    {
        $columnIds = $this->getColumnIds();
        if (empty($columnIds))
        {
            return $row;
        }
 
        $row['columns'] ??= [];
 
        foreach ($columnIds as $columnId)
        {
            $value = $this->getFlatColumnValues($row['data'][$columnId] ?? null);
            if (is_array($value))
            {
                $value = join(' / ', $value);
            }
            $value = Main\Text\HtmlFilter::encode((string)$value);
 
            $row['columns'][$columnId] ??= $value;
            $row['data']['~' . $columnId] ??= $value;
        }
 
        return $row;
    }
 
    private static function getFlatColumnValues(mixed $rawValues)
    {
        if (!is_array($rawValues))
        {
            return null;
        }
        if (array_key_exists('VALUE', $rawValues))
        {
            return $rawValues['VALUE'];
        }
        else
        {
            $result = [];
            foreach ($rawValues as $row)
            {
                if (is_array($row) && array_key_exists('VALUE', $row))
                {
                    $result[] = $row['VALUE'];
                }
            }
 
            return $result;
        }
    }
}