Initial LiveShare extension scaffolding (#7170)

* LiveShare initial shared connection

* Various cleanups

* Fix type

* Fix hygiene

extensions/liveshare/src/hostSessionManager.ts

@@ -0,0 +1,47 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import { LiveShare, SharedService } from './liveshare';
+import { ConnectionProvider } from './providers/connectionProvider';
+import { QueryProvider } from './providers/queryProvider';
+import { StatusProvider } from './providers/statusProvider';
+import { LiveShareServiceName } from './constants';
+
+declare var require: any;
+let vsls = require('vsls');
+
+export class HostSessionManager {
+	constructor(
+		context: vscode.ExtensionContext,
+		vslsApi: LiveShare
+	) {
+		vslsApi!.onDidChangeSession(async function onLiveShareSessionCHange(e: any) {
+			const isHost = e.session.role === vsls.Role.Host;
+			if (!isHost) {
+				return;
+			}
+
+			const sharedService: SharedService = await vslsApi.shareService(LiveShareServiceName);
+			if (!sharedService) {
+				vscode.window.showErrorMessage('Could not create a shared service. You have to set "liveshare.features" to "experimental" in your user settings in order to use this extension.');
+				return;
+			}
+
+			const connectionProvider = new ConnectionProvider(isHost, vslsApi, sharedService);
+
+			const queryProvider = new QueryProvider(true);
+			queryProvider.initialize(true, sharedService);
+
+			/* tslint:disable:no-unused-expression */
+			new StatusProvider(
+				isHost,
+				vslsApi,
+				connectionProvider,
+				sharedService);
+			/* tslint:enable:no-unused-expression */
+		});
+	}
+}