Support client version prerelease flag in context and LD targeting (#4994)

* Support client version prerelease flag in context and LD targeting

* Use integer instead of Boolean

src/Core/Context/CurrentContext.cs

@@ -39,6 +39,7 @@ public class CurrentContext : ICurrentContext
     public virtual int? BotScore { get; set; }
     public virtual string ClientId { get; set; }
     public virtual Version ClientVersion { get; set; }
+    public virtual bool ClientVersionIsPrerelease { get; set; }
     public virtual IdentityClientType IdentityClientType { get; set; }
     public virtual Guid? ServiceAccountOrganizationId { get; set; }
 
@@ -97,6 +98,11 @@ public class CurrentContext : ICurrentContext
         {
             ClientVersion = cVersion;
         }
+
+        if (httpContext.Request.Headers.TryGetValue("Is-Prerelease", out var clientVersionIsPrerelease))
+        {
+            ClientVersionIsPrerelease = clientVersionIsPrerelease == "1";
+        }
     }
 
     public async virtual Task BuildAsync(ClaimsPrincipal user, GlobalSettings globalSettings)

src/Core/Context/ICurrentContext.cs

@@ -29,12 +29,13 @@ public interface ICurrentContext
     int? BotScore { get; set; }
     string ClientId { get; set; }
     Version ClientVersion { get; set; }
+    bool ClientVersionIsPrerelease { get; set; }
+
     Task BuildAsync(HttpContext httpContext, GlobalSettings globalSettings);
     Task BuildAsync(ClaimsPrincipal user, GlobalSettings globalSettings);
 
     Task SetContextAsync(ClaimsPrincipal user);
 
-
     Task<bool> OrganizationUser(Guid orgId);
     Task<bool> OrganizationAdmin(Guid orgId);
     Task<bool> OrganizationOwner(Guid orgId);

src/Core/Services/Implementations/LaunchDarklyFeatureService.cs

@@ -20,6 +20,7 @@ public class LaunchDarklyFeatureService : IFeatureService
     private const string _contextKindServiceAccount = "service-account";
 
     private const string _contextAttributeClientVersion = "client-version";
+    private const string _contextAttributeClientVersionIsPrerelease = "client-version-is-prerelease";
     private const string _contextAttributeDeviceType = "device-type";
     private const string _contextAttributeClientType = "client-type";
     private const string _contextAttributeOrganizations = "organizations";
@@ -145,6 +146,7 @@ public class LaunchDarklyFeatureService : IFeatureService
             if (_currentContext.ClientVersion != null)
             {
                 builder.Set(_contextAttributeClientVersion, _currentContext.ClientVersion.ToString());
+                builder.Set(_contextAttributeClientVersionIsPrerelease, _currentContext.ClientVersionIsPrerelease);
             }
 
             if (_currentContext.DeviceType.HasValue)

test/Core.Test/Services/LaunchDarklyFeatureServiceTests.cs

@@ -24,6 +24,7 @@ public class LaunchDarklyFeatureServiceTests
         var currentContext = Substitute.For<ICurrentContext>();
         currentContext.UserId.Returns(Guid.NewGuid());
         currentContext.ClientVersion.Returns(new Version(AssemblyHelpers.GetVersion()));
+        currentContext.ClientVersionIsPrerelease.Returns(true);
         currentContext.DeviceType.Returns(Enums.DeviceType.ChromeBrowser);
 
         var client = Substitute.For<ILdClient>();