Task.php

<?php
 
namespace Bitrix\Im\V2\Controller\Chat;
 
use Bitrix\Im\V2\Chat;
use Bitrix\Im\V2\Controller\BaseController;
use Bitrix\Im\V2\Link\Task\TaskService;
use Bitrix\Im\V2\Message\MessageError;
use Bitrix\Im\V2\Rest\RestError;
use Bitrix\Main\Engine\AutoWire\ExactParameter;
 
class Task extends BaseController
{
    public function prepareAction(?Chat $chat = null, ?\Bitrix\Im\V2\Message $message = null): ?array
    {
        if (isset($message)) {
            $chat = $message->getChat();
            if (!$chat->hasAccess())
            {
                $this->addError(new RestError(RestError::ACCESS_ERROR));
 
                return null;
            }
        }
 
        if (!isset($chat))
        {
            $this->addError(new Chat\ChatError(Chat\ChatError::TASK_ACCESS_ERROR));
 
            return null;
        }
 
        $taskService = new TaskService();
        $result = $taskService->prepareDataForCreateSlider($chat, $message);
        if (!$result->isSuccess())
        {
            $error = $result->getErrors()[0];
            if (isset($error))
            {
                $this->addError($error);
 
                return null;
            }
        }
 
        return [
            'link' => $result->getResult()['LINK'],
            'params' => $result->getResult()['PARAMS']
        ];
    }
}