<?php
/**
 * Copyright (c) 2012, Tom Needham <tom@owncloud.com>
 * This file is licensed under the Affero General Public License version 3 or later.
 * See the COPYING-README file.
 */

require_once('../lib/base.php');
// Logic
$operation = isset($_GET['operation']) ? $_GET['operation'] : '';
$server = OC_OAuth_server::init();

switch($operation){
	
	case 'register':

		// Here external apps can register with an ownCloud
		if(empty($_GET['name']) || empty($_GET['url'])){
			// Invalid request
			echo 401;
		} else {
			$callbacksuccess = empty($_GET['callback_success']) ? null : $_GET['callback_success'];
			$callbackfail = empty($_GET['callback_fail']) ? null : $_GET['callback_fail'];
			$consumer = OC_OAuth_Server::register_consumer($_GET['name'], $_GET['url'], $callbacksuccess, $callbackfail);
			
			echo 'Registered consumer successfully! </br></br>Key: ' . $consumer->key . '</br>Secret: ' . $consumer->secret;
		}
	break;
	
	case 'request_token':
		
		try {
			$request = OAuthRequest::from_request();
			$token = $server->get_request_token($request);
			echo $token;
		} catch (OAuthException $exception) {
			OC_Log::write('OC_OAuth_Server', $exception->getMessage(), OC_LOG::ERROR);
			echo $exception->getMessage();
		}
	
	break;
	case 'authorise';
	
		OC_API::checkLoggedIn();
		// Example
		$consumer = array(
			'name' => 'Firefox Bookmark Sync',
			'scopes' => array('ookmarks'),
		);
		
		// Check that the scopes are real and installed
		$apps = OC_App::getEnabledApps();
		$notfound = array();
		foreach($consumer['scopes'] as $requiredapp){
			// App scopes are in this format: app_$appname
			$requiredapp = end(explode('_', $requiredapp));
			if(!in_array($requiredapp, $apps)){
				$notfound[] = $requiredapp;
			}
		}
		if(!empty($notfound)){
			// We need more apps :( Show error
			if(count($notfound)==1){
				$message = 'requires that you have an extra app installed on your ownCloud. Please contact your ownCloud administrator and ask them to install the app below.';
			} else {
				$message = 'requires that you have some extra apps installed on your ownCloud. Please contract your ownCloud administrator and ask them to install the apps below.';
			}
			$t = new OC_Template('settings', 'oauth-required-apps', 'guest');
			OC_Util::addStyle('settings', 'oauth');
			$t->assign('requiredapps', $notfound);
			$t->assign('consumer', $consumer);
			$t->assign('message', $message);
			$t->printPage();
		} else {
			$t = new OC_Template('settings', 'oauth', 'guest');
			OC_Util::addStyle('settings', 'oauth');
			$t->assign('consumer', $consumer);
			$t->printPage();
		}
	break;
	
	case 'access_token';
		try {
			$request = OAuthRequest::from_request();
			$token = $server->fetch_access_token($request);
			echo $token;
		} catch (OAuthException $exception) {
			OC_Log::write('OC_OAuth_Server', $exception->getMessage(), OC_LOG::ERROR);
			echo $exception->getMessage();
		}
		
	break;
	default:
		// Something went wrong, we need an operation!
		OC_Response::setStatus(400);
	break;
	
}