Office365Context::prepareHttpClient

private function prepareHttpClient(): HttpClient
{
	if (!Loader::includeModule('socialservices'))
	{
		throw new LoaderException('Module socialservices is required.');
	}
	$httpClient = new HttpClient();

	$oAuthEntity = $this->prepareAuthEntity($this->owner->getId());
	if ($oAuthEntity->GetAccessToken())
	{
		$httpClient->setHeader('Authorization', 'Bearer ' . $oAuthEntity->getToken());
		$httpClient->setHeader('Content-Type', 'application/json');
		$httpClient->setHeader('Prefer', 'odata.maxpagesize=' . $this->getMaxPageSize());
		$httpClient->setRedirect(false);
	}
	elseif ($checkUser = $oAuthEntity->GetCurrentUser())
	{
		if (!empty($checkUser['access_token']))
		{
			$httpClient->setHeader('Authorization', 'Bearer ' . $checkUser['access_token']);
			$httpClient->setHeader('Content-Type', 'application/json');
			$httpClient->setHeader('Prefer', 'odata.maxpagesize=' . $this->getMaxPageSize());
			$httpClient->setRedirect(false);
		}
		else
		{
			throw new AuthException('Access token not received', 401);
		}
	}
	else
	{
		// TODO: maybe move it to the exception handler.
		// Now it's impossible, because there are many points of call this class
		(new BitrixCalendarCoreMappersConnection())->update(
			$this->getConnection()->setDeleted(true)
		);
		throw new RemoteAccountException('Office365 account not found', 403);
	}
	return $httpClient;
}