Event.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Chat\ExternalChat;
 
use Bitrix\Im\V2\Result;
use Bitrix\Main\Engine\Response\Converter;
use Bitrix\Main\EventResult;
 
abstract class Event extends \Bitrix\Main\Event
{
    private const TYPE_TEMPLATE = 'On#ActionName#ExternalChat#EntityType#';
 
    public function __construct(string $entityType, $parameters)
    {
        parent::__construct('im', $this->formatType($entityType), $parameters);
    }
 
    public function hasResult(): bool
    {
        return $this->getFirstResult() !== null;
    }
 
    public function getFirstResult(): ?EventResult
    {
        return $this->getResults()[0] ?? null;
    }
 
    public function getResult(): Result
    {
        $result = new Result();
        $firstResult = $this->getFirstResult();
        if ($firstResult === null)
        {
            return $result;
        }
 
        if ($firstResult->getType() === EventResult::ERROR)
        {
            return $result->addError(new ExternalError(ExternalError::FROM_EVENT));
        }
 
        return $result->setResult($firstResult->getParameters());
    }
 
    protected function getParameterFromResult(string $key): mixed
    {
        $parameters = $this->getFirstResult()?->getParameters() ?? [];
        if (!is_array($parameters))
        {
            return null;
        }
 
        return $parameters[$key] ?? null;
    }
 
    abstract protected function getActionName(): string;
 
    protected function formatType(string $entityType): string
    {
        $converter = new Converter(Converter::TO_CAMEL | Converter::UC_FIRST);
        $entityTypeInCamelCase = $converter->process($entityType);
        $actionName = $this->getActionName();
 
        return strtr(self::TYPE_TEMPLATE, ['#ActionName#' => $actionName, '#EntityType#' => $entityTypeInCamelCase]);
    }
}