Show legacy CCS cases in interactive scene

api/QuestionsApi.Tests/CcsCaseTests.cs

@@ -177,6 +177,39 @@ public sealed class CcsCaseTests
         Assert.Throws<InvalidOperationException>(() => CcsStore.ApplyDialogueChoice(attempt, definition, "ask_reason", DateTime.UtcNow));
     }
 
+    [Fact]
+    public void LegacyCaseGetsInterviewFromExistingChartNarrative()
+    {
+        var definition = ValidImport().Cases[0];
+        definition.InitialInterview = new();
+        definition.InitialChart.HistorySections =
+        [
+            new() { Code = "hpi", Title = "History of present illness", Text = "The symptoms began this morning." },
+            new() { Code = "medications", Title = "Medications", Text = "I take no regular medicines." }
+        ];
+
+        var interview = CcsStore.EffectiveInterview(definition);
+        var attempt = new CcsAttempt { InterviewNodeId = interview.StartNodeId, OpeningCompleted = false };
+
+        Assert.Equal("opening", interview.StartNodeId);
+        Assert.Equal(5, interview.Nodes.Count);
+        CcsStore.ApplyDialogueChoice(attempt, definition, "ask_reason", DateTime.UtcNow);
+        CcsStore.ApplyDialogueChoice(attempt, definition, "ask_history_1", DateTime.UtcNow);
+        CcsStore.ApplyDialogueChoice(attempt, definition, "ask_history_2", DateTime.UtcNow);
+        CcsStore.ApplyDialogueChoice(attempt, definition, "finish_interview", DateTime.UtcNow);
+        Assert.Equal("complete", attempt.InterviewNodeId);
+        Assert.True(attempt.OpeningCompleted);
+    }
+
+    [Fact]
+    public void AuthoredInterviewRemainsPreferredOverGeneratedFallback()
+    {
+        var definition = ValidImport().Cases[0];
+        definition.InitialInterview = ValidInterview();
+
+        Assert.Same(definition.InitialInterview, CcsStore.EffectiveInterview(definition));
+    }
+
     [Fact]
     public void CcsExpectedScoreUsesSeparateUserAndCaseElo()
     {

api/QuestionsApi/Services/CcsStore.cs

@@ -108,6 +108,7 @@ public sealed class CcsStore
         }
         if (definition is null) throw new KeyNotFoundException("CCS case not found.");
         var now = DateTime.UtcNow;
+        var interview = EffectiveInterview(definition);
         var attempt = new CcsAttempt
         {
             UserId = userId,
@@ -117,7 +118,7 @@ public sealed class CcsStore
             CaseVersion = definition.Version,
             Mode = CcsAttemptModes.Timed,
             OpeningCompleted = false,
-            InterviewNodeId = definition.InitialInterview.StartNodeId,
+            InterviewNodeId = interview.StartNodeId,
             Location = definition.PresentingLocation,
             CurrentVitals = new Dictionary<string, string>(definition.InitialChart.Vitals),
             VitalHistory =
@@ -415,7 +416,8 @@ public sealed class CcsStore
             ? attempt.VitalHistory
             : [new CcsVitalSnapshot { SimulatedMinute = attempt.SimulatedMinute, Values = new Dictionary<string, string>(attempt.CurrentVitals) }];
         CcsInterviewStateResponse? interview = null;
-        var currentInterviewNode = definition.InitialInterview.Nodes.FirstOrDefault(value =>
+        var interviewDefinition = EffectiveInterview(definition);
+        var currentInterviewNode = interviewDefinition.Nodes.FirstOrDefault(value =>
             value.Id.Equals(attempt.InterviewNodeId, StringComparison.OrdinalIgnoreCase));
         if (currentInterviewNode is not null)
         {
@@ -458,12 +460,13 @@ public sealed class CcsStore
     public static void ApplyDialogueChoice(CcsAttempt attempt, CcsCaseRevision definition, string choiceId, DateTime now)
     {
         if (attempt.OpeningCompleted == true) throw new InvalidOperationException("The initial interview is already complete.");
-        var node = definition.InitialInterview.Nodes.FirstOrDefault(value =>
+        var interview = EffectiveInterview(definition);
+        var node = interview.Nodes.FirstOrDefault(value =>
             value.Id.Equals(attempt.InterviewNodeId, StringComparison.OrdinalIgnoreCase))
             ?? throw new InvalidOperationException("The interactive interview is unavailable.");
         var choice = node.Choices.FirstOrDefault(value => value.Id.Equals(choiceId, StringComparison.OrdinalIgnoreCase))
             ?? throw new ArgumentException("The dialogue choice is not available at the current interview node.");
-        var next = definition.InitialInterview.Nodes.FirstOrDefault(value =>
+        var next = interview.Nodes.FirstOrDefault(value =>
             value.Id.Equals(choice.NextNodeId, StringComparison.OrdinalIgnoreCase))
             ?? throw new InvalidOperationException("The dialogue choice target is unavailable.");
         attempt.Actions.Add(Action("dialogue_choice", choice.Id, attempt.SimulatedMinute, now));
@@ -727,8 +730,66 @@ public sealed class CcsStore
         ExternalId = value.ExternalId, Title = value.Title, System = value.System,
         PresentingLocation = value.PresentingLocation, RealTimeMinutes = value.RealTimeMinutes,
         Difficulty = value.Difficulty, Tags = value.Tags,
-        InteractiveInterviewAvailable = !string.IsNullOrWhiteSpace(value.InitialInterview.StartNodeId) && value.InitialInterview.Nodes.Count > 0
+        InteractiveInterviewAvailable = EffectiveInterview(value).Nodes.Count > 0
     };
+
+    internal static CcsInitialInterview EffectiveInterview(CcsCaseRevision definition)
+    {
+        if (!string.IsNullOrWhiteSpace(definition.InitialInterview.StartNodeId)
+            && definition.InitialInterview.Nodes.Count > 0)
+            return definition.InitialInterview;
+
+        var narrative = definition.InitialChart.HistorySections
+            .Where(value => !string.IsNullOrWhiteSpace(value.Text))
+            .Select((value, index) => new
+            {
+                Id = $"history_{index + 1}",
+                Prompt = string.IsNullOrWhiteSpace(value.Title)
+                    ? "Can you tell me more about your history?"
+                    : $"Can you tell me about your {value.Title.Trim().ToLowerInvariant()}?",
+                value.Text
+            }).ToList();
+        if (narrative.Count == 0 && !string.IsNullOrWhiteSpace(definition.InitialChart.History))
+            narrative.Add(new { Id = "history_1", Prompt = "Can you tell me more about your history?", Text = definition.InitialChart.History });
+
+        var nodes = new List<CcsDialogueNode>
+        {
+            new()
+            {
+                Id = "opening", PatientText = "Hello, doctor.",
+                Choices = [new() { Id = "ask_reason", Text = "What brings you in today?", NextNodeId = "reason" }]
+            },
+            new()
+            {
+                Id = "reason", PatientText = definition.InitialChart.ReasonForEncounter,
+                Choices = [new()
+                {
+                    Id = narrative.Count > 0 ? "ask_history_1" : "finish_interview",
+                    Text = narrative.Count > 0 ? narrative[0].Prompt : "Is there anything else you would like me to know?",
+                    NextNodeId = narrative.Count > 0 ? narrative[0].Id : "complete"
+                }]
+            }
+        };
+        for (var index = 0; index < narrative.Count; index++)
+        {
+            var next = index + 1 < narrative.Count ? narrative[index + 1] : null;
+            nodes.Add(new CcsDialogueNode
+            {
+                Id = narrative[index].Id, PatientText = narrative[index].Text,
+                Choices = [new()
+                {
+                    Id = next is null ? "finish_interview" : $"ask_history_{index + 2}",
+                    Text = next?.Prompt ?? "Is there anything else you would like me to know?",
+                    NextNodeId = next?.Id ?? "complete"
+                }]
+            });
+        }
+        nodes.Add(new CcsDialogueNode
+        {
+            Id = "complete", PatientText = "That is everything I can think of, doctor.", IsTerminal = true
+        });
+        return new CcsInitialInterview { StartNodeId = "opening", Nodes = nodes };
+    }
     internal static int Rank(CcsOrderDefinition order, string query)
     {
         var values = new[] { order.CanonicalName }.Concat(order.Aliases).Select(value => value.ToLowerInvariant());