PrototypeItemIndex::getItemIdsByQuery

static function getItemIdsByQuery(string $query): ?array
{
	$query = static::prepareFullTextQuery($query);

	if ($query)
	{
		$result = [];
		$list = static::getList([
			'select' => ['ITEM_ID'],
			'filter' => [
				'*SEARCH_CONTENT' => $query,
			],
		]);
		while($item = $list->fetch())
		{
			$result[] = $item['ITEM_ID'];
		}

		return $result;
	}

	return null;
}