Allow the Razor extension to report telemetry (and initialize)

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/Razor/RazorInitializer.cs

@@ -0,0 +1,39 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Composition;
+using Microsoft.CodeAnalysis.Contracts.Telemetry;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+using Microsoft.CodeAnalysis.Host.Mef;
+using Microsoft.CodeAnalysis.LanguageServer.Handler;
+using Roslyn.LanguageServer.Protocol;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.Razor;
+
+[Shared]
+[ExportRazorStatelessLspService(typeof(RazorInitializer))]
+[method: ImportingConstructor]
+[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
+internal sealed class RazorInitializer(Lazy<LanguageServerWorkspaceFactory> workspaceFactory, [Import(AllowDefault = true)] ITelemetryReporter? telemetryReporter) : ILspService, IOnInitialized
+{
+    public Task OnInitializedAsync(ClientCapabilities clientCapabilities, RequestContext context, CancellationToken cancellationToken)
+    {
+        var razorInitializerService = context.GetService<AbstractRazorInitializer>();
+        if (razorInitializerService is null)
+        {
+            // No initializer service registered, nothing to do.
+            return Task.CompletedTask;
+        }
+
+        razorInitializerService.Initialize(workspaceFactory.Value.HostWorkspace);
+
+        var razorTelemetryReporter = context.GetService<RazorTelemetryReporter>();
+        if (telemetryReporter is not null && razorTelemetryReporter is not null)
+        {
+            razorTelemetryReporter.Initialize(new TelemetryReporterWrapper(telemetryReporter));
+        }
+
+        return Task.CompletedTask;
+    }
+}

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/Razor/TelemetryReporterWrapper.cs

@@ -0,0 +1,16 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CodeAnalysis.Contracts.Telemetry;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.Razor;
+
+internal class TelemetryReporterWrapper(ITelemetryReporter telemetryReporter) : ILanguageServerTelemetryReporterWrapper
+{
+    public void ReportEvent(string name, List<KeyValuePair<string, object?>> properties)
+    {
+        telemetryReporter.Log(name, properties);
+    }
+}

src/Tools/ExternalAccess/Razor/Features/AbstractRazorInitializer.cs

@@ -0,0 +1,10 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+
+internal abstract class AbstractRazorInitializer : AbstractRazorLspService
+{
+    internal abstract void Initialize(Workspace workspace);
+}

src/Tools/ExternalAccess/Razor/Features/ILanguageServerTelemetryReporterWrapper.cs

@@ -0,0 +1,12 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+
+namespace Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+
+internal interface ILanguageServerTelemetryReporterWrapper
+{
+    void ReportEvent(string name, List<KeyValuePair<string, object?>> properties);
+}

src/Tools/ExternalAccess/Razor/Features/RazorTelemetryReporter.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+
+namespace Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+
+internal abstract class RazorTelemetryReporter : AbstractRazorLspService
+{
+    private ILanguageServerTelemetryReporterWrapper? _wrapper;
+
+    internal void Initialize(ILanguageServerTelemetryReporterWrapper wrapper)
+    {
+        _wrapper = wrapper;
+    }
+
+    public void ReportEvent(string name, List<KeyValuePair<string, object?>> properties)
+    {
+        _wrapper?.ReportEvent(name, properties);
+    }
+}