Import Wizard (#2130)

Flat File Importer

extensions/import/src/services/serviceApiManager.ts

@@ -0,0 +1,64 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 * as sqlops from 'sqlops';
+import * as vscode from 'vscode';
+import * as contracts from './contracts';
+import { SqlOpsDataClient } from 'dataprotocol-client/lib/main';
+
+export enum ApiType {
+	FlatFileProvider = 'FlatFileProvider'
+}
+
+export interface IServiceApi {
+	onRegisteredApi<T>(type: ApiType): vscode.Event<T>;
+	registerApi<T>(type: ApiType, feature: T): vscode.Disposable;
+}
+
+export interface IModelViewDefinition {
+	id: string;
+	modelView: sqlops.ModelView;
+}
+
+export class ServiceApiManager implements IServiceApi {
+	private modelViewRegistrations: { [id: string]: boolean } = {};
+	private featureEventChannels: { [type: string]: vscode.EventEmitter<any> } = {};
+	private _onRegisteredModelView = new vscode.EventEmitter<IModelViewDefinition>();
+
+	public onRegisteredApi<T>(type: ApiType): vscode.Event<T> {
+		let featureEmitter = this.featureEventChannels[type];
+		if (!featureEmitter) {
+			featureEmitter = new vscode.EventEmitter<T>();
+			this.featureEventChannels[type] = featureEmitter;
+		}
+		return featureEmitter.event;
+	}
+
+	public registerApi<T>(type: ApiType, feature: T): vscode.Disposable {
+		let featureEmitter = this.featureEventChannels[type];
+		if (featureEmitter) {
+			featureEmitter.fire(feature);
+		}
+		// TODO handle unregistering API on close
+		return {
+			dispose: () => undefined
+		};
+	}
+
+	public get onRegisteredModelView(): vscode.Event<IModelViewDefinition> {
+		return this._onRegisteredModelView.event;
+	}
+
+	public registerModelView(id: string, modelView: sqlops.ModelView): void {
+		this._onRegisteredModelView.fire({
+			id: id,
+			modelView: modelView
+		});
+	}
+}
+
+export let managerInstance = new ServiceApiManager();