Añadidos endpoints de validación, organización del backend en subcarpetas y archivos y añadido el control de errores http.

backend/api/services/value_function_service.py

@@ -0,0 +1,38 @@
+def compute_value_function(request):
+    levels = request.levels
+    cards = request.blank_cards
+    refs = request.references
+
+    p, q = sorted(int(k) for k in refs)
+    up, uq = refs[str(p)], refs[str(q)]
+
+    if len(levels) < 3:
+        raise ValueError("Mínimo debe haber 3 niveles para esta funcionalidad.")
+
+    total_units = sum(cards[i] + 1 for i in range(p, q))
+    if total_units == 0:
+        raise ValueError("Las cartas no pueden generar 0 unidades.")
+
+    alpha = (uq - up) / total_units
+
+    values = [0] * len(levels)
+    values[p] = up
+
+    for i in range(p + 1, len(levels)):
+        units = sum(cards[r] + 1 for r in range(p, i))
+        values[i] = up + alpha * units
+
+    for i in range(p - 1, -1, -1):
+        units = sum(cards[r] + 1 for r in range(i, p))
+        values[i] = up - alpha * units
+
+    return {
+        "criterion_name": request.criterion_name,
+        "values": {levels[i]: round(values[i], 4) for i in range(len(levels))}
+    }
+
+
+def compute_points(request):
+    result = compute_value_function(request)
+    values = list(result["values"].values())
+    return {"points": [{"x": i, "y": values[i]} for i in range(len(values))]}