resource deployment ext implementation -wip (#5508)

* resource types

* implement the dialog

* remove unused method

* fix issues

* formatting

* 5-17

* address comments and more tests

extensions/resource-deployment/src/services/platformService.ts

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 fs from 'fs';
+import * as vscode from 'vscode';
+
+/**
+ * Abstract of platform dependencies
+ */
+export interface IPlatformService {
+	platform(): string;
+	copyFile(source: string, target: string): void;
+	fileExists(file: string): boolean;
+	openFile(filePath: string): void;
+	showErrorMessage(message: string): void;
+}
+
+export class PlatformService implements IPlatformService {
+	platform(): string {
+		return process.platform;
+	}
+
+	copyFile(source: string, target: string): void {
+		fs.copyFileSync(source, target);
+	}
+
+	fileExists(file: string): boolean {
+		return fs.existsSync(file);
+	}
+
+	openFile(filePath: string): void {
+		vscode.commands.executeCommand('vscode.open', vscode.Uri.file(filePath));
+	}
+
+	showErrorMessage(message: string): void {
+		vscode.window.showErrorMessage(message);
+	}
+}