adding task integration with wizard and dialog framework (#1929)

* adding task integration with wizard and dialog framework

src/sql/workbench/api/node/extHostBackgroundTaskManagement.ts

@@ -0,0 +1,113 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import { IMainContext } from 'vs/workbench/api/node/extHost.protocol';
+import { ExtHostBackgroundTaskManagementShape, SqlMainContext, MainThreadBackgroundTaskManagementShape } from 'sql/workbench/api/node/sqlExtHost.protocol';
+import * as sqlops from 'sqlops';
+import * as vscode from 'vscode';
+import { Emitter } from 'vs/base/common/event';
+import { generateUuid } from 'vs/base/common/uuid';
+
+export enum TaskStatus {
+	NotStarted = 0,
+	InProgress = 1,
+	Succeeded = 2,
+	SucceededWithWarning = 3,
+	Failed = 4,
+	Canceled = 5,
+	Canceling = 6
+}
+
+export class ExtBackgroundOperation implements sqlops.BackgroundOperation {
+	private readonly _proxy: MainThreadBackgroundTaskManagementShape;
+	private _onCanceled = new Emitter<void>();
+
+	constructor(
+		private _id: string,
+		mainContext: IMainContext
+	) {
+		this._proxy = mainContext.getProxy(SqlMainContext.MainThreadBackgroundTaskManagement);
+	}
+
+	public updateStatus(status: TaskStatus, message?: string): void {
+		this._proxy.$updateTask({
+			message: message,
+			status: status,
+			taskId: this.id
+		});
+	}
+
+	public get onCanceled(): vscode.Event<void> {
+		return this._onCanceled.event;
+	}
+
+	public cancel(): void {
+		this._onCanceled.fire();
+	}
+
+	public get id(): string {
+		return this._id;
+	}
+}
+
+export class ExtHostBackgroundTaskManagement implements ExtHostBackgroundTaskManagementShape {
+	private readonly _proxy: MainThreadBackgroundTaskManagementShape;
+	private readonly _handlers = new Map<string, sqlops.BackgroundOperationInfo>();
+	private readonly _operations = new Map<string, ExtBackgroundOperation>();
+	private readonly _mainContext: IMainContext;
+
+	constructor(
+		mainContext: IMainContext
+	) {
+		this._proxy = mainContext.getProxy(SqlMainContext.MainThreadBackgroundTaskManagement);
+		this._mainContext = mainContext;
+	}
+
+	$onTaskRegistered(operationId: string): void {
+		let extOperationInfo = new ExtBackgroundOperation(operationId, this._mainContext);
+		this._operations.set(operationId, extOperationInfo);
+		let operationInfo = this._handlers.get(operationId);
+		if (operationInfo) {
+			operationInfo.operation(extOperationInfo);
+		}
+	}
+
+	$onTaskCanceled(operationId: string): void {
+		let operation = this._operations.get(operationId);
+		if (operation) {
+			operation.cancel();
+		}
+	}
+
+	$registerTask(operationInfo: sqlops.BackgroundOperationInfo): void {
+		let operationId = operationInfo.operationId || `OperationId${generateUuid()}`;
+		if (this._handlers.has(operationId)) {
+			throw new Error(`operation '${operationId}' already exists`);
+		}
+
+		this._handlers.set(operationId, operationInfo);
+		let taskInfo: sqlops.TaskInfo = {
+			databaseName: undefined,
+			serverName: undefined,
+			description: operationInfo.description,
+			isCancelable: operationInfo.isCancelable,
+			name: operationInfo.displayName,
+			providerName: undefined, //setting provider name will cause the task to be processed by the provider. But this task is created in the extension and needs to be handled
+			//by the extension
+			taskExecutionMode: 0,
+			taskId: operationId,
+			status: TaskStatus.NotStarted,
+			connection: operationInfo.connection
+		};
+		this._proxy.$registerTask(taskInfo);
+	}
+
+	$removeTask(operationId: string) {
+		if (this._handlers.has(operationId)) {
+			this._handlers.delete(operationId);
+		}
+	}
+}