<?php

namespace Vn\Web;

require_once (__DIR__.'/http-request.php');
require_once (__DIR__.'/json-reply.php');
require_once (__DIR__.'/json-message.php');

/**
 * Base class for rest services.
 **/
class JsonRequest extends HttpRequest
{
	function listen ()
	{
		try {
			// Checks the client version

			if (!empty ($_COOKIE['vn_version']))
				$clientVersion = (int) $_COOKIE['vn_version'];

			if (isset ($clientVersion)
			&& $clientVersion < $this->getVersion ())
				throw new Lib\UserException (s('Critical version available'), 'newVersion');

			// Fetchs the result

			$json = $this->run ();
			$this->json ($json);
		}
		catch (SessionExpiredException $e)
		{
			$this->setError (s('The session has expired'), 'sessionExpired');
		}
		catch (BadLoginException $e)
		{
			$this->setError (s('Invalid login'), 'badLogin');
		}
		catch (Lib\UserException $e)
		{
			$this->setError ($e->getMessage (), $e->getCode ());
		}
	}

	function json ($json)
	{
		$reply = new JsonReply ();
		$reply->data = $json;

		if ($this->warnings)
		{
			$reply->warnings = [];

			foreach ($this->warnings as $warning)
				$reply->warnings = $warning;
		}

		$this->replyJson ($reply);
	}
	
	function replyJson ($reply)
	{
		header ('Content-Type: application/json; charset=UTF-8');
		echo json_encode ($reply);
	}

	function addWarning ($message, $code)
	{
		if (!isset ($this->reply->warnings))
			$this->reply->warnings = [];
	
		$this->warnings[] = new JsonMessage ($code, $message);
	}
	
	function setError ($message, $code)
	{
		http_response_code (400);
		$reply = new JsonMessage ($code, $message);
		$this->replyJson ($reply);
	}
}

?>