Don't ignore non-updatable files

Don't discriminate with these files; let them have the right to
join the session or generate access token like other sessions

controller/sessioncontroller.php

@@ -99,16 +99,9 @@ class SessionController extends Controller{
 			$view = \OC\Files\Filesystem::getView();
 			$path = $view->getPath($fileId);
 
-			if ($view->isUpdatable($path)) {
-				$file = new File($fileId);
-				$response = Db\Session::start($this->uid, $file);
-			} else {
-				$info = $view->getFileInfo($path);
-				$response = [
-					'permissions' => $info['permissions'],
-					'id' => $fileId
-				];
-			}
+			$file = new File($fileId);
+			$response = Db\Session::start($this->uid, $file);
+
 			$response = array_merge(
 					$response,
 					[ 'status'=>'success' ]

js/documents.js

@@ -18,6 +18,7 @@ $.widget('oc.documentGrid', {
 			.then(function(){
 				that._render();
 
+				// TODO: Handle all of this logic by sending UserCanWrite: false to loolwsd
 				if (!documentsMain.isGuest) {
 					var editGroups = $('#edit_groups').val()
 					    .split('|')
@@ -658,6 +659,7 @@ var documentsMain = {
 
 			documentsMain.esId = response.es_id;
 			documentsMain.memberId = response.member_id;
+			documentsMain.canEdit = response.permissions & OC.PERMISSION_UPDATE;
 
 			documentsMain.loadDocument();
 

lib/db/wopi.php

@@ -49,7 +49,7 @@ class Wopi extends \OCA\Richdocuments\Db{
 		// Get the virtual path (if the file is shared).
 		$path = $view->getPath($fileId);
 
-		if (!$view->is_file($path) || !$view->isUpdatable($path)) {
+		if (!$view->is_file($path)) {
 			throw new \Exception('Invalid fileId.');
 		}