comments.php

См. документацию.

<?php
 
namespace Bitrix\Calendar\Integration\Im;
 
use Bitrix\Im\Model\ChatTable;
 
class Comments
{
    public static function getCounts(array $messageIds): array
    {
        if (!\Bitrix\Main\Loader::includeModule('im'))
        {
            return [];
        }
 
        $comments = ChatTable::query()
            ->setSelect([
                'MESSAGE_COUNT',
                'MESSAGE_ID' => 'PARENT_MID',
            ])
            ->whereIn('MESSAGE_ID', $messageIds)
            ->fetchAll()
        ;
 
        return array_column($comments, 'MESSAGE_COUNT', 'MESSAGE_ID');
    }
}