(GH-355) Re-add Telemetry

This commit re-adds the version details to the telemetry implementation,
but not in the same exact place. This adds the capture to the closing
statement for the connection manager, which is called when the extension
stops. This allows us to send one event per 'session', and since we
include time spent we will be able to differentiate in appinsights.

Author: jpogran

src/connection.ts

@@ -8,6 +8,8 @@ import { RubyHelper } from './rubyHelper';
 import { PuppetStatusBar } from './PuppetStatusBar';
 import { PuppetLanguageClient } from './PuppetLanguageClient';
 import { ConnectionConfiguration } from './configuration';
+import { reporter } from './telemetry/telemetry';
+import { PuppetVersionRequest } from './messages';
 
 const langID = 'puppet'; // don't change this
 const documentSelector = { scheme: 'file', language: langID };
@@ -28,13 +30,15 @@ export class ConnectionManager implements IConnectionManager {
   private languageServerClient: LanguageClient;
   private languageServerProcess: cp.ChildProcess;
   private puppetLanguageClient: PuppetLanguageClient;
+  private timeSpent:number;
 
   constructor(
     context: vscode.ExtensionContext,
     logger: ILogger,
     statusBar: PuppetStatusBar,
     connectionConfiguration: IConnectionConfiguration
   ) {
+    this.timeSpent = Date.now();
     this.logger = logger;
     this.extensionContext = context;
     this.connectionStatus = ConnectionStatus.NotStarted;
@@ -77,6 +81,18 @@ export class ConnectionManager implements IConnectionManager {
 
     this.connectionStatus = ConnectionStatus.Stopping;
 
+    if (this.languageServerClient !== undefined) {
+      this.timeSpent = Date.now() - this.timeSpent;
+      this.languageServerClient.sendRequest(PuppetVersionRequest.type).then(versionDetails => {
+        reporter.sendTelemetryEvent('data', {
+          'timeSpent'            : this.timeSpent.toString(),
+          'puppetVersion'        : versionDetails.puppetVersion,
+          'facterVersion'        : versionDetails.facterVersion,
+          'languageServerVersion': versionDetails.languageServerVersion,
+        });
+      });
+    }
+
     // Close the language server client
     if (this.languageServerClient !== undefined) {
       this.languageServerClient.stop();