ReplyService.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Message\Reply;
 
use Bitrix\Im\V2\Chat;
use Bitrix\Im\V2\Common\ContextCustomer;
use Bitrix\Im\V2\Message;
use Bitrix\Im\V2\Result;
 
class ReplyService
{
    use ContextCustomer;

    public function createMessage(Message $replyingMessage, string $comment): Result
    {
        $result = new Result();
        if (!$replyingMessage->getChat()->checkAccess($this->getContext()->getUserId())->isSuccess())
        {
            return $result->addError(new Chat\ChatError(Chat\ChatError::ACCESS_DENIED));
        }
 
        $messageId = \CIMMessenger::Add([
            "MESSAGE_TYPE" => $replyingMessage->getChat()->getType(),
            "MESSAGE" => $comment,
            "PARAMS" => [
                "REPLY_ID" => $replyingMessage->getMessageId(),
            ],
            "TO_CHAT_ID" =>  $replyingMessage->getChat()->getChatId(),
            "FROM_USER_ID" => $this->getContext()->getUserId(),
        ]);
 
        if (!$messageId)
        {
            return $result->addError(new Message\MessageError(Message\MessageError::SENDING_FAILED));
        }
 
        return $result->setResult(new Message($messageId));
    }
 
}