<?php

namespace Vn\Rest;

require_once ('vn/rest/reply.php');
require_once ('vn/rest/encoding.php');
require_once ('vn/rest/message.php');

/**
 * Manages the REST service.
 *
 * @property Reply $reply The reply
 **/
class Service
{
	private static $reply = NULL;
	static $encoding = Encoding::JSON;
	
	static function init ()
	{
		self::$reply = new Reply ();
		set_error_handler ('Vn\Rest\Service::errorHandler', E_ALL);
		set_exception_handler ('Vn\Rest\Service::exceptionHandler');
	}
	
	static function setData ($data)
	{
		self::$reply->data = $data;
	}

	static function addWarning ($domain, $code, $message)
	{
		if (!isset (self::$reply->warnings))
			self::$reply->warnings = [];
	
		self::$reply->warnings[] =
			new Message ($domain, $code, $message);
	}
	
	static function setError ($domain, $code, $message)
	{
		self::$reply->data = NULL;
		self::$reply->error =
			new Message ($domain, $code, $message);
	}
	
	static function exceptionHandler ($e)
	{
		// XXX: Exception trace
		//$trace = array_pop (debug_backtrace (DEBUG_BACKTRACE_IGNORE_ARGS, 2));

		self::setError ('PHP', 'exception', $e->getMessage ());
		self::sendReply ();
	}
	
	static function errorHandler ($code, $message, $file, $line, $context)
	{
		self::setError ('PHP', 'error', "$file:$line:$message");
		self::sendReply ();

		return TRUE;
	}

	static function sendReply ()
	{
		header ('Content-Type: application/json; charset=UTF-8');
		echo json_encode (self::$reply);
	}
}

?>