Add SUPER simulation review sample

api/QuestionsApi/Services/ExamSimulationStore.cs

@@ -97,7 +97,12 @@ public class ExamSimulationStore
         return simulation;
     }
 
-    public async Task<ExamSimulationStateResponse> BuildResultsPreviewAsync(string userId)
+    public async Task<ExamSimulationStateResponse> BuildResultsPreviewAsync(string userId) =>
+        await ToResponseAsync(await BuildSampleAsync(userId, false));
+
+    public Task<ExamSimulation> CreateSampleCompletedAsync(string userId) => BuildSampleAsync(userId, true);
+
+    private async Task<ExamSimulation> BuildSampleAsync(string userId, bool persist)
     {
         var bank = (await _questions.GetPublishedAsync()).Where(question => question.Choices.Count >= 5).ToList();
         if (bank.Count < RequiredQuestions)
@@ -130,19 +135,25 @@ public class ExamSimulationStore
             };
         }).ToList();
         var responseMap = responses.ToDictionary(item => item.QuestionExternalId, StringComparer.Ordinal);
-        return new ExamSimulationStateResponse
+        var now = DateTime.UtcNow;
+        var simulation = new ExamSimulation
         {
-            Id = "preview",
+            UserId = userId,
             State = ExamSimulationStates.Completed,
+            IsSample = true,
             CurrentBlock = BlockSizes.Length - 1,
             BreakSecondsRemaining = 3300,
+            Items = items,
             Responses = responses,
             Score = ExamSimulationScoring.Calculate(items, responseMap, questionMap),
+            CreatedUtc = now,
+            UpdatedUtc = now,
+            CompletedUtc = now,
             BlueprintTargets = targets,
-            BlueprintActual = items.GroupBy(item => item.BlueprintCategory).ToDictionary(group => group.Key, group => group.Count()),
-            ReviewQuestions = items.Select(item => QuestionResponse.FromModelWithChoices(
-                questionMap[item.QuestionExternalId], item.PresentedChoiceIds, item.QuestionElo)).ToList()
+            BlueprintActual = items.GroupBy(item => item.BlueprintCategory).ToDictionary(group => group.Key, group => group.Count())
         };
+        if (persist) await _simulations.InsertOneAsync(simulation);
+        return simulation;
     }
 
     public async Task<ExamSimulation?> FindActiveAsync(string userId) =>
@@ -205,6 +216,7 @@ public class ExamSimulationStore
     {
         Id = item.Id ?? "",
         State = item.State,
+        IsSample = item.IsSample,
         CreatedUtc = item.CreatedUtc,
         UpdatedUtc = item.UpdatedUtc,
         CompletedUtc = item.CompletedUtc,