add samples (#920)

samples/extensionSamples/src/utils.ts

@@ -0,0 +1,45 @@
+'use strict';
+
+import * as fs from 'fs-extra';
+import * as handlebars from 'handlebars';
+import * as path from 'path';
+import * as vscode from 'vscode';
+
+import * as Constants from './constants';
+import * as LocalizedConstants from './localizedConstants';
+
+/**
+ * Helper to log messages to the developer console if enabled
+ * @param msg Message to log to the console
+ */
+export function logDebug(msg: any): void {
+    let config = vscode.workspace.getConfiguration(Constants.extensionConfigSectionName);
+    let logDebugInfo = config[Constants.configLogDebugInfo];
+    if (logDebugInfo === true) {
+        let currentTime = new Date().toLocaleTimeString();
+        let outputMsg = '[' + currentTime + ']: ' + msg ? msg.toString() : '';
+        console.log(outputMsg);
+    }
+}
+
+export function renderTemplateHtml(extensionPath: string, templateName: string, templateValues: object): Thenable<string> {
+    let templatePath = path.join(extensionPath, 'resources', templateName);
+
+    // 1) Read the template from the disk
+    // 2) Compile it as a handlebars template and render the HTML
+    // 3) On failure, return a simple string as an error
+    return fs.readFile(templatePath, 'utf-8')
+        .then(templateText => {
+            let template = handlebars.compile(templateText);
+            return template(templateValues);
+        })
+        .then(
+            undefined,
+            error => {
+                logDebug(error);
+                return LocalizedConstants.msgErrorLoadingTab;
+            }
+        );
+}
+
+