RecentChannel.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Recent;
 
use Bitrix\Im\Model\ChatTable;
use Bitrix\Im\Model\EO_Chat_Collection;
use Bitrix\Im\V2\Chat;
 
class RecentChannel extends Recent
{
    public static function getOpenChannels(int $limit, ?int $lastMessageId = null): self
    {
        $recent = new static();
        $chatEntities = static::getOrmEntities($limit, $lastMessageId);
 
        foreach ($chatEntities as $entity)
        {
            $recentItem = new RecentItem();
            $recentItem
                ->setMessageId($entity->getLastMessageId())
                ->setChatId($entity->getId())
                ->setDialogId('chat' . $entity->getId())
            ;
            $recent[] = $recentItem;
        }
 
        return $recent;
    }
 
    protected static function getOrmEntities(int $limit, ?int $lastMessageId = null): EO_Chat_Collection
    {
        $query = ChatTable::query()
            ->setSelect(['ID', 'LAST_MESSAGE_ID'])
            ->where('TYPE', Chat::IM_TYPE_OPEN_CHANNEL)
            ->setLimit($limit)
            ->setOrder(['LAST_MESSAGE_ID' => 'DESC'])
        ;
 
        if (isset($lastMessageId))
        {
            $query->where('LAST_MESSAGE_ID', '<', $lastMessageId);
        }
 
        return $query->fetchCollection();
    }
}