Add metrics to PullRequestFileMargin

Increment NumberOfPullRequestFileMarginToggleInlineCommentMargin when
checkbox is toggled.
Increment NumberOfPullRequestFileMarginViewChanges when view
changes/comments is clicked.

Author: jcansdale

src/GitHub.Exports/Models/UsageModel.cs

@@ -72,6 +72,8 @@ public class MeasuresModel
             public int NumberOfTeamExplorerHomeOpenPullRequestList { get; set; }
             public int NumberOfNavigateToPullRequestFileDiff { get; set; }
             public int ExecuteToggleInlineCommentMarginCommand { get; set; }
+            public int NumberOfPullRequestFileMarginToggleInlineCommentMargin { get; set; }
+            public int NumberOfPullRequestFileMarginViewChanges { get; set; }
         }
     }
 }

src/GitHub.InlineReviews/Margins/PullRequestFileMargin.cs

@@ -9,7 +9,6 @@
 using GitHub.Extensions;
 using GitHub.InlineReviews.Views;
 using GitHub.InlineReviews.ViewModels;
-using GitHub.InlineReviews.Commands;
 using Microsoft.VisualStudio.Text.Editor;
 using ReactiveUI;
 using Task = System.Threading.Tasks.Task;
@@ -38,12 +37,13 @@ public PullRequestFileMargin(
             IWpfTextView textView,
             IToggleInlineCommentMarginCommand toggleInlineCommentMarginCommand,
             IGoToSolutionOrPullRequestFileCommand goToSolutionOrPullRequestFileCommand,
-            IPullRequestSessionManager sessionManager)
+            IPullRequestSessionManager sessionManager,
+            Lazy<IUsageTracker> usageTracker)
         {
             this.textView = textView;
             this.sessionManager = sessionManager;
 
-            viewModel = new PullRequestFileMarginViewModel(toggleInlineCommentMarginCommand, goToSolutionOrPullRequestFileCommand);
+            viewModel = new PullRequestFileMarginViewModel(toggleInlineCommentMarginCommand, goToSolutionOrPullRequestFileCommand, usageTracker);
             visualElement = new PullRequestFileMarginView { DataContext = viewModel, ClipToBounds = true };
 
             visibilitySubscription = viewModel.WhenAnyValue(x => x.Enabled).Subscribe(enabled =>

src/GitHub.InlineReviews/Margins/PullRequestFileMarginProvider.cs

@@ -3,7 +3,6 @@
 using GitHub.Commands;
 using GitHub.Services;
 using GitHub.Settings;
-using GitHub.InlineReviews.Commands;
 using Microsoft.VisualStudio.Utilities;
 using Microsoft.VisualStudio.Text.Editor;
 
@@ -24,18 +23,21 @@ internal sealed class PullRequestFileMarginProvider : IWpfTextViewMarginProvider
         readonly IToggleInlineCommentMarginCommand enableInlineCommentsCommand;
         readonly IGoToSolutionOrPullRequestFileCommand goToSolutionOrPullRequestFileCommand;
         readonly IPackageSettings packageSettings;
+        readonly Lazy<IUsageTracker> usageTracker;
 
         [ImportingConstructor]
         public PullRequestFileMarginProvider(
             IToggleInlineCommentMarginCommand enableInlineCommentsCommand,
             IGoToSolutionOrPullRequestFileCommand goToSolutionOrPullRequestFileCommand,
             IPullRequestSessionManager sessionManager,
-            IPackageSettings packageSettings)
+            IPackageSettings packageSettings,
+            Lazy<IUsageTracker> usageTracker)
         {
             this.enableInlineCommentsCommand = enableInlineCommentsCommand;
             this.goToSolutionOrPullRequestFileCommand = goToSolutionOrPullRequestFileCommand;
             this.sessionManager = sessionManager;
             this.packageSettings = packageSettings;
+            this.usageTracker = usageTracker;
         }
 
         /// <summary>
@@ -60,8 +62,8 @@ public IWpfTextViewMargin CreateMargin(IWpfTextViewHost wpfTextViewHost, IWpfTex
                 return null;
             }
 
-            return new PullRequestFileMargin(wpfTextViewHost.TextView, enableInlineCommentsCommand, goToSolutionOrPullRequestFileCommand,
-                sessionManager);
+            return new PullRequestFileMargin(
+                wpfTextViewHost.TextView, enableInlineCommentsCommand, goToSolutionOrPullRequestFileCommand, sessionManager, usageTracker);
         }
 
         bool IsDiffView(ITextView textView) => textView.Roles.Contains("DIFF");

src/GitHub.InlineReviews/ViewModels/PullRequestFileMarginViewModel.cs

@@ -1,4 +1,7 @@
-using System.Windows.Input;
+using System;
+using System.Windows.Input;
+using GitHub.Commands;
+using GitHub.Services;
 using ReactiveUI;
 
 namespace GitHub.InlineReviews.ViewModels
@@ -10,10 +13,13 @@ public class PullRequestFileMarginViewModel : ReactiveObject
         int commentsInFile;
         bool marginEnabled;
 
-        public PullRequestFileMarginViewModel(ICommand toggleInlineCommentMarginCommand, ICommand viewChangesCommand)
+        public PullRequestFileMarginViewModel(ICommand toggleInlineCommentMarginCommand, ICommand viewChangesCommand,
+            Lazy<IUsageTracker> usageTracker)
         {
-            ToggleInlineCommentMarginCommand = toggleInlineCommentMarginCommand;
-            ViewChangesCommand = viewChangesCommand;
+            ToggleInlineCommentMarginCommand = toggleInlineCommentMarginCommand = new UsageTrackingCommand(
+                usageTracker, x => x.NumberOfPullRequestFileMarginToggleInlineCommentMargin, toggleInlineCommentMarginCommand);
+            ViewChangesCommand = viewChangesCommand = new UsageTrackingCommand(
+                usageTracker, x => x.NumberOfPullRequestFileMarginViewChanges, viewChangesCommand);
         }
 
         public bool Enabled