[Telemetry][Hosts]Add telemetry to Hosts (#21486)

src/modules/Hosts/Hosts/App.xaml.cs

@@ -12,6 +12,7 @@ using Hosts.Views;
 using ManagedCommon;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using Microsoft.PowerToys.Telemetry;
 using Microsoft.UI.Dispatching;
 using Microsoft.UI.Xaml;
 
@@ -104,6 +105,8 @@ namespace Hosts
                 Logger.LogInfo($"Hosts started detached from PowerToys Runner.");
             }
 
+            PowerToysTelemetry.Log.WriteEvent(new Hosts.Telemetry.HostsFileEditorOpenedEvent());
+
             _window = new MainWindow();
             _window.Activate();
         }

src/modules/Hosts/Hosts/Telemetry/HostsFileEditorOpenedEvent.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics.Tracing;
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+
+namespace Hosts.Telemetry
+{
+    [EventData]
+    public class HostsFileEditorOpenedEvent : EventBase, IEvent
+    {
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServiceUsage;
+    }
+}

src/modules/Hosts/HostsModuleInterface/dllmain.cpp

@@ -165,6 +165,7 @@ public:
             {
                 launch_process(true);
             }
+            Trace::ActivateEditor();
         }
         catch (std::exception&)
         {
@@ -185,6 +186,7 @@ public:
     {
         Logger::trace("HostsModuleInterface::enable()");
         m_enabled = true;
+        Trace::EnableHostsFileEditor(true);
     };
 
     virtual void disable()
@@ -196,6 +198,7 @@ public:
         }
 
         m_enabled = false;
+        Trace::EnableHostsFileEditor(false);
     }
 };
 

src/modules/Hosts/HostsModuleInterface/trace.cpp

@@ -17,3 +17,24 @@ void Trace::UnregisterProvider() noexcept
 {
     TraceLoggingUnregister(g_hProvider);
 }
+
+// Log if the user has HostsFileEditor enabled or disabled
+void Trace::EnableHostsFileEditor(const bool enabled) noexcept
+{
+    TraceLoggingWrite(
+        g_hProvider,
+        "HostsFileEditor_EnableHostsFileEditor",
+        ProjectTelemetryPrivacyDataTag(ProjectTelemetryTag_ProductAndServicePerformance),
+        TraceLoggingKeyword(PROJECT_KEYWORD_MEASURE),
+        TraceLoggingBoolean(enabled, "Enabled"));
+}
+
+// Log that the user tried to activate the editor
+void Trace::ActivateEditor() noexcept
+{
+    TraceLoggingWrite(
+        g_hProvider,
+        "HostsFileEditor_Activate",
+        ProjectTelemetryPrivacyDataTag(ProjectTelemetryTag_ProductAndServicePerformance),
+        TraceLoggingKeyword(PROJECT_KEYWORD_MEASURE));
+}

src/modules/Hosts/HostsModuleInterface/trace.h

@@ -5,4 +5,10 @@ class Trace
 public:
     static void RegisterProvider() noexcept;
     static void UnregisterProvider() noexcept;
+
+    // Log if the user has HostsFileEditor enabled or disabled
+    static void EnableHostsFileEditor(const bool enabled) noexcept;
+
+    // Log that the user tried to activate the editor
+    static void ActivateEditor() noexcept;
 };