Remove "client" folder in Agent extension (#1820)

* Remove "client" folder in Agent extension

* Alert dialog cleanups

extensions/agent/src/apiWrapper.ts

@@ -0,0 +1,63 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 vscode from 'vscode';
+import * as data from 'sqlops';
+
+/**
+ * Wrapper class to act as a facade over VSCode and Data APIs and allow us to test / mock callbacks into
+ * this API from our code
+ *
+ * @export
+ * @class ApiWrapper
+ */
+export class ApiWrapper {
+    // Data APIs
+
+    public registerWebviewProvider(widgetId: string, handler: (webview: data.DashboardWebview) => void): void {
+        return data.dashboard.registerWebviewProvider(widgetId, handler);
+    }
+
+
+    public registerControlHostProvider(widgetId: string, handler: (webview: data.DashboardWebview) => void): void {
+        return data.dashboard.registerWebviewProvider(widgetId, handler);
+    }
+
+    /**
+     * Get the configuration for a extensionName
+     * @param extensionName The string name of the extension to get the configuration for
+     * @param resource The optional URI, as a URI object or a string, to use to get resource-scoped configurations
+     */
+    public getConfiguration(extensionName: string, resource?: vscode.Uri | string): vscode.WorkspaceConfiguration {
+        if (typeof resource === 'string') {
+            try {
+                resource = this.parseUri(resource);
+            } catch (e) {
+                resource = undefined;
+            }
+        }
+        return vscode.workspace.getConfiguration(extensionName, resource as vscode.Uri);
+    }
+
+    /**
+     * Parse uri
+     */
+    public parseUri(uri: string): vscode.Uri {
+        return vscode.Uri.parse(uri);
+    }
+
+    public showOpenDialog(options: vscode.OpenDialogOptions): Thenable<vscode.Uri[] | undefined> {
+        return vscode.window.showOpenDialog(options);
+    }
+
+    public showErrorMessage(message: string, ...items: string[]): Thenable<string | undefined> {
+        return vscode.window.showErrorMessage(message, ...items);
+    }
+
+    public get workspaceRootPath(): string {
+        return vscode.workspace.rootPath;
+    }
+}