RequestFacebook::directQuery

protected function directQuery(array $params = array())
{
	$url = 'https://graph.facebook.com/v8.0/';
	$url .= $params['endpoint'];

	$clientParameters = is_array($params['fields']) ? $params['fields'] : array();
	$clientParameters = $clientParameters + array('access_token' => $this->adapter->getToken());

	$result = '';
	if ($params['method'] == 'GET')
	{
		$url .= '?' . http_build_query($clientParameters, "", "&");
		$result = $this->client->get($url);
	}
	elseif ($params['method'] == 'DELETE')
	{
		$result = $this->client->delete($url, $clientParameters, true);
	}
	else
	{
		$result = $this->client->post($url, $clientParameters, true);
	}
	if (!$params['has_pagination'])
		return $result;

	try
	{
		$partialResult = $result;
		$result = [];
		$page = 1;
		do
		{
			$decodedResult = Json::decode($partialResult);
			$nextPage = ($decodedResult['paging'] && $decodedResult['paging']['next']) ? $decodedResult['paging']['next'] : false;
			unset($decodedResult['paging']);

			$result = array_merge_recursive($result, $decodedResult);

			if ($nextPage)
			{
				$this->client->query($params['method'], $nextPage);
				$partialResult = $this->client->getResult();
				$page++;
			}
			else
			{
				if ($page == 1) // if haven't ['paging']['next'] in original response
				{
					return $partialResult;
				}
				break;
			}
		}
		while($nextPage && $page < 20); // max 500 items

		return Json::encode($result);
	}
	catch (Exception $e)
	{
		return $result;
	}
}