Refactoring permissions. Allow guests to join session

ajax/controller.php

@@ -28,4 +28,16 @@ class Controller {
 		return \OCP\User::getUser();
 	}
 	
+	/**
+	 * Do security precheck for not logged in users
+	 * @param bool callcheck - whether security token check is needed
+	 */
+	public static function preDispatchGuest($callcheck = true){
+		if ($callcheck){
+			\OCP\JSON::callCheck();
+		}
+		\OCP\JSON::checkAppEnabled('documents');
+		return '(guest)';
+	}
+
 }

ajax/otpoll.php

@@ -37,7 +37,11 @@
 
 namespace OCA\Documents;
 
- \OCP\JSON::checkLoggedIn();
+
+//TODO: check if the session is related to a public share
+ //\OCP\JSON::checkLoggedIn();
+
+
  \OCP\JSON::checkAppEnabled('documents');
  // session_write_close();
 

ajax/sessionController.php

@@ -14,34 +14,23 @@ namespace OCA\Documents;
 
 class SessionController extends Controller{
 	
-	public static function join($args){
+	public static function joinAsGuest($args){
+		$uid = self::preDispatchGuest();
+		$token = @$args['token'];
+		$file = File::getByShareToken($token);
+		self::join($uid, $file);
+	}
+
+	public static function joinAsUser($args){
 		$uid = self::preDispatch();
 		$fileId = intval(@$args['file_id']);
-		try{
 		$file = new File($fileId);
-			list($ownerView, $path) = $file->getOwnerViewAndPath();
-			$session = Session::getSessionByFileId($fileId);
-			
-			//If there is no existing session we need to start a new one
-			if (!$session || empty($session)){
-
-				$genesisPath = $ownerView->storeDocument($ownerView, $path);
-
-				if (!$genesisPath){
-					throw new \Exception('Unable to copy document. Check permissions and make sure you have enought free space.');
+		self::join($uid, $file);
 	}
 	
-				$hash = $ownerView->getHashByGenesis($genesisPath);
-				$session = Session::add(
-						$genesisPath, 
-						$hash, 
-						$file->getOwner(), 
-						$fileId
-				);
-			}
-
-			$session['permissions'] = $ownerView->getFilePermissions($path);
-			$session['member_id'] = (string) Member::add($session['es_id'], $uid, Helper::getRandomColor());
+	protected static function join($uid, $file){
+		try{
+			$session = Session::start($uid, $file);
 			\OCP\JSON::success($session);
 			exit();
 		} catch (\Exception $e){

ajax/userController.php

@@ -46,5 +46,4 @@ class UserController extends Controller{
 
 		echo $image->show();
 	}
-	
 }

appinfo/routes.php

@@ -57,13 +57,21 @@ $this->create('documents_session_listhtml', 'ajax/session/listHtml')
 	->action('\OCA\Documents\SessionController', 'listAllHtml')
 ;
 
-$this->create('documents_session_join', 'ajax/session/join/{file_id}')
+$this->create('documents_session_joinasuser', 'ajax/session/joinasuser/{file_id}')
 	->get()
-	->action('\OCA\Documents\SessionController', 'join')
+	->action('\OCA\Documents\SessionController', 'joinAsUser')
 ;
-$this->create('documents_session_join', 'ajax/session/join/{file_id}')
+$this->create('documents_session_joinasuser', 'ajax/session/joinasuser/{file_id}')
 	->post()
-	->action('\OCA\Documents\SessionController', 'join')
+	->action('\OCA\Documents\SessionController', 'joinAsUser')
+;
+$this->create('documents_session_joinasguest', 'ajax/session/joinasguest/{token}')
+	->get()
+	->action('\OCA\Documents\SessionController', 'joinAsGuest')
+;
+$this->create('documents_session_joinasguest', 'ajax/session/joinasguest/{token}')
+	->post()
+	->action('\OCA\Documents\SessionController', 'joinAsGuest')
 ;
 
 $this->create('documents_session_save', 'ajax/session/save')

js/documents.js

@@ -5,6 +5,7 @@ var documentsMain = {
 	_members: [],
 	isEditormode : false,
 	useUnstable : false,
+	isGuest : false,
 	
 	UI : {
 		/* Overlay HTML */
@@ -89,10 +90,14 @@ var documentsMain = {
 		"use strict";
 		documentsMain.UI.init();
 		
+		if (!OC.currentUser){
+			documentsMain.isGuest = true;
+			var fileId = $("[name='document']").val();
+		} else {
 			// Does anything indicate that we need to autostart a session?
-		var fileId = parent.location.hash.replace(/\W*/g, '')
-		    || $("[name='document']").val()
-		;
+			var fileId = parent.location.hash.replace(/\W*/g, '');
+		}
+		
 		
 		if ($("[name='document']").val()){
 			// !Login page mess wih WebODF toolbars
@@ -138,7 +143,6 @@ var documentsMain = {
 	initSession: function(response) {
 		"use strict";
 		
-
 		if (!response || !response.es_id || !response.status || response.status==='error'){
 			OC.Notification.show(t('documents', 'Failed to load this document. Please check if it can be opened with an external odt editor. This might also mean it has been unshared or deleted recently.'));
 			documentsMain.prepareGrid();
@@ -175,8 +179,14 @@ var documentsMain = {
 
 	joinSession: function(fileId) {
 		console.log('joining session '+fileId);
+		var url;
+		if (documentsMain.isGuest){
+			url = OC.Router.generate('documents_session_joinasguest') + '/' + fileId
+		} else {
+			url = OC.Router.generate('documents_session_joinasuser') + '/' + fileId
+		}
 		$.post(
-			OC.Router.generate('documents_session_join') + '/' + fileId,
+			url,
 			{ },
 			documentsMain.initSession
 		);
@@ -230,7 +240,12 @@ var documentsMain = {
 			// successfull shutdown - all is good.
 			// TODO: proper session leaving call to server, either by webodfServerInstance or custom
 // 			documentsMain.webodfServerInstance.leaveSession(sessionId, memberId, function() {
+			if (documentsMain.isGuest){
+				$(document.body).attr('id', 'body-login');
+				$('header,footer').show();
+			}
 			documentsMain.webodfEditorInstance.destroy(documentsMain.UI.hideEditor);
+			
 // 			});
 		});
 	},
@@ -240,7 +255,7 @@ var documentsMain = {
 	},
 	
 	show: function(){
-		if (!OC.currentUser){
+		if (documentsMain.isGuest){
 			return;
 		}
 		

lib/file.php

@@ -25,6 +25,8 @@ namespace OCA\Documents;
 
 class File {
 	protected $fileId;
+	protected $owner;
+	protected $path;
 	
 	public function __construct($fileId){
 		if (!$fileId){
@@ -34,22 +36,46 @@ class File {
 		$this->fileId = $fileId;
 	}
 	
+	public static function getByShareToken($token){
+		$linkItem = \OCP\Share::getShareByToken($token);
+		if (is_array($linkItem) && isset($linkItem['uid_owner'])) {
+			// seems to be a valid share
+			$rootLinkItem = \OCP\Share::resolveReShare($linkItem);
+			$fileOwner = $rootLinkItem['uid_owner'];
+		} else {
+			throw new \Exception('This file was probably unshared');
+		}
+		
+		$file = new File($rootLinkItem['file_source']);
+		$file->setOwner($rootLinkItem['uid_owner']);
+		$file->setPath('/files' . $rootLinkItem['file_target']);
+		
+		return $file;
+	}
+
+	public function getFileId(){
+		return $this->fileId;
+	}
+	
+	public function setOwner($owner){
+		$this->owner = $owner;
+	}
+	
+	public function setPath($path){
+		$this->path = $path;
+	}
+
 	/**
 	 * 
 	 * @return string owner of the current file item
 	 * @throws \Exception
 	 */
 	public function getOwnerViewAndPath(){
+		if (!$this->owner || !$this->path){
 			$fileInfo = \OC\Files\Cache\Cache::getById($this->fileId);
 
 			//is it shared 
-		$sharedInfo = \OCP\Share::getItemSharedWithBySource(
-					'file', 
-					$this->fileId,
-					\OCP\Share::FORMAT_NONE,
-					null,
-					true
-		);
+			$sharedInfo = $this->getSharedBySource();
 		
 			if (is_array($sharedInfo)){
 				$owner = $sharedInfo['uid_owner'];
@@ -66,6 +92,12 @@ class File {
 		
 			$view = new View('/' . $owner);
 			
+			$this->owner = $owner;
+		} else {
+			$view = new View('/' . $this->owner);
+			$path = $this->path;
+		}
+		
 		if (!$view->file_exists($path)){
 			throw new \Exception($path . ' doesn\'t exist');
 		}
@@ -74,25 +106,34 @@ class File {
 	}
 	
 	public function getOwner(){
+		if (!$this->owner){
+
 			$fileInfo = \OC\Files\Cache\Cache::getById($this->fileId);
 
 			//is it shared 
-		$sharedInfo = \OCP\Share::getItemSharedWithBySource(
-					'file', 
-					$this->fileId,
-					\OCP\Share::FORMAT_NONE,
-					null,
-					true
-		);
+			$sharedInfo = $this->getSharedBySource();
+			if (!is_array($sharedInfo)){
+				$sharedInfo = $this->getSharedByLink();
+			}
 		
 			if (is_array($sharedInfo)){
-			$owner = $sharedInfo['uid_owner'];
+				$this->owner = $sharedInfo['uid_owner'];
 			} else {
 				// owner is myself
-			$owner = \OCP\User::getUser();
+				$this->owner = \OCP\User::getUser();
+			}
+		}
+		return $this->owner;
 	}
 
-		return $owner;
+	protected function getSharedBySource(){
+		return \OCP\Share::getItemSharedWithBySource(
+					'file', 
+					$this->fileId,
+					\OCP\Share::FORMAT_NONE,
+					null,
+					true
+		);
 	}
 	
 }

lib/member.php

@@ -21,14 +21,14 @@ class Member extends Db{
 	const MEMBER_STATUS_ACTIVE = 1;
 	const MEMBER_STATUS_INACTIVE = 2;
 
-	public static function add($esId, $displayname, $color){
+	public static function add($esId, $uid, $color){
 		$query = \OCP\DB::prepare('
 			INSERT INTO ' . self::DB_TABLE . ' (`es_id`, `uid`, `color`, `last_activity`)
 			VALUES (?, ?, ?, ?)
 			');
 		$query->execute(array(
 			$esId,
-			\OCP\User::getUser(),
+			$uid,
 			$color,
 			time()
 		));

lib/session.php

@@ -1,4 +1,5 @@
 <?php
+
 /**
  * ownCloud - Documents App
  *
@@ -12,8 +13,34 @@
 namespace OCA\Documents;
 
 class Session extends Db {
+
 	const DB_TABLE = '`*PREFIX*documents_session`';
 
+	public static function start($uid, File $file){
+		list($ownerView, $path) = $file->getOwnerViewAndPath();
+		$session = Session::getSessionByFileId( $file->getFileId() );
+
+		//If there is no existing session we need to start a new one
+		if (!$session || empty($session)){
+
+			$genesisPath = $ownerView->storeDocument($ownerView, $path);
+
+			if (!$genesisPath){
+				throw new \Exception('Unable to copy document. Check permissions and make sure you have enought free space.');
+			}
+
+			$hash = $ownerView->getHashByGenesis($genesisPath);
+			$session = Session::add(
+				$genesisPath, $hash, $file->getOwner(), $file->getFileId()
+			);
+		}
+
+		$session['permissions'] = $ownerView->getFilePermissions($path);
+		$session['member_id'] = (string) Member::add($session['es_id'], $uid, Helper::getRandomColor());
+		
+		return $session;
+	}
+
 	public static function add($genesis, $hash, $owner, $fileId){
 		$query = \OCP\DB::prepare('
 			INSERT INTO ' . self::DB_TABLE . ' (`es_id`, `genesis_url`, `genesis_hash`, `owner`, `file_id`)

public.php

@@ -38,7 +38,7 @@ if (isset($fileOwner)) {
 	\OCP\Util::addStyle( 'documents', '3rdparty/webodf/dojo-app');
 	\OCP\Util::addStyle( 'documents', '3rdparty/webodf/editor' );
 	\OCP\Util::addScript('documents', 'documents');
-	$tmpl->assign('document', $rootLinkItem['file_source']);
+	$tmpl->assign('document', $token);
 } else {
 	// TODO: show nice 404 page
 }