Added usage tracking to PR details.

Author: grokys

src/GitHub.App/ViewModels/PullRequestDetailViewModel.cs

@@ -362,6 +362,8 @@ public async Task Load(IPullRequestModel pullRequest)
             }
 
             IsLoading = IsBusy = false;
+            IsBusy = false;
+            usageTracker.IncrementPullRequestOpened().Forget();
 
             if (!isInCheckout)
             {
@@ -481,6 +483,8 @@ IObservable<Unit> DoCheckout(object unused)
             {
                 var localBranches = await pullRequestsService.GetLocalBranches(repository, Model).ToList();
 
+                usageTracker.IncrementPullRequestCheckedOut().Forget();
+
                 if (localBranches.Count > 0)
                 {
                     return pullRequestsService.SwitchToBranch(repository, Model);

src/GitHub.VisualStudio/Services/UsageTracker.cs

@@ -195,6 +195,20 @@ public async Task IncrementGitHubPaneHelpClicks()
             SaveUsage(usage);
         }
 
+        public async Task IncrementPullRequestOpened()
+        {
+            var usage = await LoadUsage();
+            ++usage.Model.NumberOfPullRequestsOpened;
+            SaveUsage(usage);
+        }
+
+        public async Task IncrementPullRequestCheckedOut()
+        {
+            var usage = await LoadUsage();
+            ++usage.Model.NumberOfPullRequestsCheckedOut;
+            SaveUsage(usage);
+        }
+
         async Task Initialize()
         {
             // The services needed by the usage tracker are loaded when they are first needed to
@@ -346,6 +360,8 @@ static void ClearCounters(UsageModel usage, bool weekly, bool monthly)
             usage.NumberOfForkPullRequestsCheckedOut = 0;
             usage.NumberOfForkPullRequestPulls = 0;
             usage.NumberOfForkPullRequestPushes = 0;
+            usage.NumberOfPullRequestsOpened = 0;
+            usage.NumberOfPullRequestsCheckedOut = 0;
 
             if (weekly)
                 usage.NumberOfStartupsWeek = 0;

src/GitHub.VisualStudio/Services/UsageTrackerDispatcher.cs

@@ -32,5 +32,7 @@ public UsageTrackerDispatcher([Import(typeof(SVsServiceProvider))] IServiceProvi
         public Task IncrementWelcomeDocsClicks() => inner.IncrementWelcomeDocsClicks();
         public Task IncrementWelcomeTrainingClicks() => inner.IncrementWelcomeTrainingClicks();
         public Task IncrementGitHubPaneHelpClicks() => inner.IncrementGitHubPaneHelpClicks();
+        public Task IncrementPullRequestOpened() => inner.IncrementPullRequestOpened();
+        public Task IncrementPullRequestCheckedOut() => inner.IncrementPullRequestCheckedOut();
     }
 }