Add telemetry to Repl

Author: Paul van Brenk

Nodejs/Product/Nodejs/Repl/NodejsReplEvaluator.cs

@@ -14,6 +14,7 @@
 using System.Threading.Tasks;
 using System.Web.Script.Serialization;
 using System.Windows.Forms;
+using Microsoft.NodejsTools.Telemetry;
 using Microsoft.VisualStudio.Shell;
 using Microsoft.VisualStudio.Text;
 
@@ -27,6 +28,8 @@ internal sealed class NodejsReplEvaluator : IReplEvaluator
         private readonly INodejsReplSite _site;
         internal static readonly object InputBeforeReset = new object();    // used to mark buffers which are no longer valid because we've done a reset
 
+        private static bool LoggedReplUse = false;
+
         public NodejsReplEvaluator()
             : this(VsNodejsReplSite.Site)
         {
@@ -93,6 +96,14 @@ public Task<ExecutionResult> ExecuteText(string text)
                 return ExecutionResult.Failed;
             }
 
+            if (!LoggedReplUse)
+            {
+                // we only want to log the first time each session, 
+                // and not flood the telemetry with every command.
+                TelemetryHelper.LogReplUse();
+                LoggedReplUse = true;
+            }
+
             return this._listener.ExecuteText(text);
         }
 

Nodejs/Product/Nodejs/Telemetry/TelemetryEvents.cs

@@ -33,6 +33,11 @@ internal static class TelemetryEvents
         /// User uninstalled package.
         /// </summary>
         public const string UnInstallNpm = Prefix + "UnInstallNpm";
+
+        /// <summary>
+        /// User executed some script in the interactive window.
+        /// </summary>
+        public const string UsedRepl = Prefix + "UsedRepl";
     }
 
     internal static class TelemetryProperties

Nodejs/Product/Nodejs/Telemetry/TelemetryHelper.cs

@@ -62,13 +62,9 @@ public static void LogUnInstallNpmPackage(string packageName)
             defaultSession.PostEvent(userTask);
         }
 
-        public static void LogUpdateNpmPackage(string packageName, string version)
+        internal static void LogReplUse()
         {
-            var userTask = new UserTaskEvent(UpdateNpm, TelemetryResult.Success);
-            userTask.Properties[NpmPackageName] = packageName;
-            userTask.Properties[NpmPackageVersion] = version;
-
-            defaultSession.PostEvent(userTask);
+            defaultSession.PostUserTask(UsedRepl, TelemetryResult.Success);
         }
     }
 }