up

src/Policy/StellaOps.Policy.Engine/Endpoints/PathScopeSimulationEndpoint.cs

@@ -3,6 +3,7 @@ using System.Text.Json;
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
 using StellaOps.Policy.Engine.Streaming;
+using StellaOps.Policy.Engine.Overlay;
 
 namespace StellaOps.Policy.Engine.Endpoints;
 
@@ -19,6 +20,7 @@ public static class PathScopeSimulationEndpoint
     private static async Task<IResult> HandleAsync(
         [FromBody] PathScopeSimulationRequest request,
         PathScopeSimulationService service,
+        PathScopeSimulationBridgeService bridge,
         CancellationToken cancellationToken)
     {
         try
@@ -31,6 +33,19 @@ public static class PathScopeSimulationEndpoint
                 responseBuilder.AppendLine(line);
             }
 
+            // Emit change event stub when run in what-if mode.
+            if (request.Options.Deterministic && request.Options.IncludeTrace)
+            {
+                var bridgeRequest = new PathScopeSimulationBridgeRequest(
+                    Tenant: request.Tenant,
+                    Rules: Array.Empty<string>(),
+                    Overlays: null,
+                    Paths: new[] { request },
+                    Mode: "preview",
+                    Seed: null);
+                await bridge.SimulateAsync(bridgeRequest, cancellationToken).ConfigureAwait(false);
+            }
+
             return Results.Text(responseBuilder.ToString(), "application/x-ndjson", Encoding.UTF8);
         }
         catch (PathScopeSimulationException ex)