From 7c3b7a49e921e00ee635bfa14b1f6bef1120e20a Mon Sep 17 00:00:00 2001
From: Thomas Culotta <tculotta@microsoft.com>
Date: Wed, 20 Mar 2024 14:44:49 -0700
Subject: [PATCH] VmAgent endpoint to report GSDK version telemetry

---
 .../Controllers/SessionHostController.cs      | 25 ++++++++++++++++++-
 .../Instrumentation/GsdkVersionInfo.cs        |  8 ++++++
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 LocalMultiplayerAgent/Instrumentation/GsdkVersionInfo.cs

diff --git a/LocalMultiplayerAgent/Controllers/SessionHostController.cs b/LocalMultiplayerAgent/Controllers/SessionHostController.cs
index 55e3141..ed8ed1b 100644
--- a/LocalMultiplayerAgent/Controllers/SessionHostController.cs
+++ b/LocalMultiplayerAgent/Controllers/SessionHostController.cs
@@ -11,7 +11,7 @@ namespace LocalMultiplayerAgent.Controllers
     using Microsoft.Azure.Gaming.LocalMultiplayerAgent;
     using Microsoft.Azure.Gaming.VmAgent.Model;
     using Microsoft.Extensions.Hosting;
-    using Newtonsoft.Json;
+    using Instrumentation;
 
     public class SessionHostController : Controller
     {
@@ -96,6 +96,29 @@ public async Task<IActionResult> ProcessHeartbeat(string sessionHostId,
             });
         }
 
+        private static bool _wasGsdkVersionLogged = false;
+        [HttpPost]
+        [Route("v1/metrics/{sessionHostId}/gsdkinfo")]
+        public IActionResult ReportGsdkVersion(string sessionHostId, [FromBody] GsdkVersionInfo vi)
+        {
+            if (string.IsNullOrEmpty(vi.Version))
+            {
+                return BadRequest($"{nameof(GsdkVersionInfo.Version)} should not be an empty string");
+            }
+            if (string.IsNullOrEmpty(vi.Flavor))
+            {
+                return BadRequest($"{nameof(GsdkVersionInfo.Flavor)} should not be an empty string");
+            }
+
+            if (!_wasGsdkVersionLogged)
+            {
+                Globals.MultiLogger.LogInformation($"GSDK flavor/version: {vi.Flavor}/{vi.Version} from session host {sessionHostId}");
+                _wasGsdkVersionLogged = true;
+            }
+
+            return Ok();
+        }
+
         [HttpPatch]
         [Route("v1/sessionHosts/{sessionHostId}")]
         public Task<IActionResult> ProcessHeartbeatV1(
diff --git a/LocalMultiplayerAgent/Instrumentation/GsdkVersionInfo.cs b/LocalMultiplayerAgent/Instrumentation/GsdkVersionInfo.cs
new file mode 100644
index 0000000..ecc6273
--- /dev/null
+++ b/LocalMultiplayerAgent/Instrumentation/GsdkVersionInfo.cs
@@ -0,0 +1,8 @@
+namespace LocalMultiplayerAgent.Instrumentation
+{
+    public class GsdkVersionInfo
+    {
+        public string Flavor { get; set; } // Unreal/Unity/C#/C++ etc.
+        public string Version { get; set; }
+    }
+}