Implement checking for the Patchwork user agent (#1090)

* Implement checking for the Patchwork user agent, move logout into standalone method

* Quick fixes (awesome name)

* 403 user at login instead of logging out at /announce

* Move configuration and revert logout changes

* Rework parsing to check against GameVersion enum and game token GameVersion

* Fix logic error

oopsie

* Fix Zaprit suggestions

* Simplify patchwork game version test

* Test patchwork user agent with regex instead

* Fix Qodana warnings

* Fix remaining Qodana warnings

ProjectLighthouse.Tests.GameApiTests/Unit/PatchworkUserAgentTests.cs

@@ -0,0 +1,44 @@
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Helpers;
+using Xunit;
+
+namespace ProjectLighthouse.Tests.GameApiTests.Unit;
+
+[Trait("Category", "Unit")]
+public class PatchworkUserAgentTests
+{
+    [Fact]
+    public void CanValidatePatchworkUserAgents()
+    {
+        string[] validUserAgents = {
+            "PatchworkLBP1 1.0",
+            "PatchworkLBP2 2.0",
+            "PatchworkLBP3 3.0",
+            "PatchworkLBPV 4.0",
+            "PatchworkLBP1 1.5",
+        };
+
+        string[] invalidUserAgents = {
+            // Matching
+            "patchworklbp1 1.0", // Case sensitive
+            "ptchwrklbp1 1.0", // Misspelled
+            "PatchworkLBP1 1", // Missing major/minor
+            "PatchworkLBP1 1.000001", // Major/minor too long
+
+            // Data
+            "PatchworkLBP1 0.5", // Version number too low
+            "PatchworkLBP1 A.0" // Int cannot be parsed
+        };
+
+        bool result;
+        foreach (string userAgent in validUserAgents)
+        {
+            result = PatchworkHelper.IsValidPatchworkUserAgent(userAgent);
+            Assert.True(result, $"Valid user agent: \"{userAgent}\" was evaluated as {result}.");
+        }
+        foreach (string userAgent in invalidUserAgents)
+        {
+            result = PatchworkHelper.IsValidPatchworkUserAgent(userAgent);
+            Assert.False(result, $"Invalid user agent: \"{userAgent}\" was evaluated as {result}.");
+        }
+    }
+}