Adapt dynamic question difficulty to learner Elo

2026-07-23 16:18:44 -05:00
parent 5b5741de37
commit fae38d2ded
13 changed files with 519 additions and 33 deletions
@@ -0,0 +1,61 @@
+using QuestionsApi.Models;
+using System.Text.Json;
+
+namespace QuestionsApi.Services;
+
+public static class DynamicBlueprintResolver
+{
+    private static readonly JsonSerializerOptions Json = new(JsonSerializerDefaults.Web);
+
+    public static List<DynamicQuestionBlueprint> ResolveAll(IEnumerable<DynamicQuestionBlueprint> source)
+    {
+        var all = source.ToList();
+        var resolved = new List<DynamicQuestionBlueprint>();
+        foreach (var blueprint in all.OrderBy(value => value.Version))
+        {
+            if (blueprint.BaseBlueprintVersion <= 0)
+            {
+                resolved.Add(blueprint);
+                continue;
+            }
+            var baseBlueprint = resolved.FirstOrDefault(value =>
+                value.ExternalId == blueprint.ExternalId
+                && value.Version == blueprint.BaseBlueprintVersion)
+                ?? throw new InvalidDataException(
+                    $"{blueprint.ExternalId} v{blueprint.Version} base version {blueprint.BaseBlueprintVersion} not found");
+            var materialized = Clone(baseBlueprint);
+            materialized.Id = null;
+            materialized.Version = blueprint.Version;
+            materialized.BaseBlueprintVersion = blueprint.BaseBlueprintVersion;
+            materialized.QualityStandardVersion = blueprint.QualityStandardVersion;
+            materialized.IsPublished = blueprint.IsPublished;
+            materialized.CaseFamilies = blueprint.CaseFamilies.Select(overlay =>
+            {
+                var baseFamily = baseBlueprint.CaseFamilies.FirstOrDefault(value => value.Id == overlay.BaseFamilyId)
+                    ?? throw new InvalidDataException(
+                        $"{blueprint.ExternalId} v{blueprint.Version} base family {overlay.BaseFamilyId} not found");
+                var family = Clone(baseFamily);
+                family.Id = overlay.Id;
+                family.BaseFamilyId = overlay.BaseFamilyId;
+                family.DifficultyTier = overlay.DifficultyTier;
+                family.NominalElo = overlay.NominalElo;
+                if (!string.IsNullOrWhiteSpace(family.LeadIn)
+                    && family.StemTemplate.EndsWith(family.LeadIn, StringComparison.Ordinal))
+                    family.StemTemplate = family.StemTemplate[..^family.LeadIn.Length].TrimEnd();
+                if (!string.IsNullOrWhiteSpace(overlay.StemTemplate))
+                    family.StemTemplate = $"{family.StemTemplate} {overlay.StemTemplate}".Trim();
+                if (!string.IsNullOrWhiteSpace(overlay.LeadIn))
+                    family.LeadIn = overlay.LeadIn;
+                if (overlay.Distractors.Count > 0)
+                    family.Distractors = overlay.Distractors;
+                return family;
+            }).ToList();
+            resolved.Add(materialized);
+        }
+        return resolved;
+    }
+
+    private static T Clone<T>(T value) =>
+        JsonSerializer.Deserialize<T>(JsonSerializer.Serialize(value, Json), Json)
+        ?? throw new InvalidOperationException("Blueprint clone failed.");
+}