Comment out global awareness websocket until awareness works server side.

Author: 3coins

src/index.ts

@@ -15,6 +15,12 @@ import {
   notebookCellExecutor
 } from './docprovider';
 
+import { IStateDB, StateDB } from '@jupyterlab/statedb';
+import { IGlobalAwareness } from '@jupyter/collaborative-drive';
+import * as Y from 'yjs';
+import { Awareness } from 'y-protocols/awareness';
+import { IAwareness } from '@jupyter/ydoc';
+
 /**
  * Initialization data for the @jupyter/rtc-core extension.
  */
@@ -55,12 +61,56 @@ const plugin: JupyterFrontEndPlugin<void> = {
   }
 };
 
+/**
+ * Jupyter plugin creating a global awareness for RTC.
+ */
+export const rtcGlobalAwarenessPlugin: JupyterFrontEndPlugin<IAwareness> = {
+  id: '@jupyter/rtc-core/collaboration-extension:rtcGlobalAwareness',
+  description: 'Add global awareness to share working document of users.',
+  requires: [IStateDB],
+  provides: IGlobalAwareness,
+  activate: (app: JupyterFrontEnd, state: StateDB): IAwareness => {
+    // @ts-ignore
+    const { user } = app.serviceManager;
+
+    const ydoc = new Y.Doc();
+    const awareness = new Awareness(ydoc);
+
+    // TODO: Uncomment once global awareness is working
+    /*const server = ServerConnection.makeSettings();
+    const url = URLExt.join(server.wsUrl, 'api/collaboration/room');
+
+    new WebSocketAwarenessProvider({
+      url: url,
+      roomID: 'JupyterLab:globalAwareness',
+      awareness: awareness,
+      user: user
+    });*/
+
+    state.changed.connect(async () => {
+      const data: any = await state.toJSON();
+      const current: string = data['layout-restorer:data']?.main?.current || '';
+
+      // For example matches `notebook:Untitled.ipynb` or `editor:untitled.txt`,
+      // but not when in launcher or terminal.
+      if (current.match(/^\w+:.+/)) {
+        awareness.setLocalStateField('current', current);
+      } else {
+        awareness.setLocalStateField('current', null);
+      }
+    });
+
+    return awareness;
+  }
+};
+
 const plugins: JupyterFrontEndPlugin<unknown>[] = [
   rtcContentProvider,
   yfile,
   ynotebook,
   logger,
   notebookCellExecutor,
+  rtcGlobalAwarenessPlugin,
   plugin
 ];