Basic UserID support.

Author: damieng

Source/CSharpAnalytics.Tests/Protocols/Measurement/MeasurementAnalyticsClientTests.cs

@@ -144,6 +144,17 @@ public void MeasurementAnalyticsClient_AdjustUriBeforeRequest_Clears_Fragment()
             Assert.AreEqual(actual.Fragment, "");
         }
 
+        [TestMethod]
+        public void MeasurementAnalyticsClient_AdjustUriBeforeRequest_Adds_Uid_Parameter()
+        {
+            var originalUri = new Uri("http://anything.really.com/something#" + DateTime.UtcNow.ToString("o"));
+            var client = new MeasurementAnalyticsClient() { UserId = "Testing" };
+
+            var actual = client.AdjustUriBeforeRequest(originalUri);
+
+            StringAssert.Contains(actual.Query, "uid=Testing");
+        }
+
         [TestMethod]
         public void MeasurementAnalyticsClient_OnTrack_Fires_When_Tracked()
         {

Source/CSharpAnalytics/Protocols/Measurement/MeasurementAnalyticsClient.cs

@@ -29,6 +29,8 @@ public class MeasurementAnalyticsClient
         /// </summary>
         public event EventHandler<MeasurementActivity> OnTrack = delegate { };
 
+        public string UserId { get; set; }
+
         /// <summary>
         /// Configure this MeasurementAnalyticsClient so it can start recording and sending analytics.
         /// </summary>
@@ -178,6 +180,9 @@ private static void ValidateEnum(Enum index)
         public Uri AdjustUriBeforeRequest(Uri uri)
         {
             var parameters = GetQueryParameters(uri.GetComponents(UriComponents.Query, UriFormat.Unescaped));
+            if (!String.IsNullOrWhiteSpace(UserId))
+                parameters["uid"] = UserId;
+
             AddQueueTimeFromFragment(uri, parameters);
             return new UriBuilder(uri) { Query = GetQueryString(parameters), Fragment = "" }.Uri;
         }