Интегрирован wesp в сайт

WESP_REL/app/lab/calc/gfe_norms.py

@@ -0,0 +1,94 @@
+"""Динамические нормы по уравнениям GfE (Германия)."""
+
+from __future__ import annotations
+
+from typing import Any
+
+USP_DYNAMIC_KEY = "usp"
+NEL_DYNAMIC_KEY = "nel"
+
+# GfE 2001 Milchkühe — Erhaltung + Milch (Standardmilch / FCM)
+NEL_MAINTENANCE_COEFF = 0.293  # MJ NEL / (kg LM)^0,75 / Tag
+NEL_PER_KG_MILK_MJ = 3.3  # MJ NEL / kg Milch (FCM)
+
+
+def gfe_usp_min_g(
+    mass_kg: float | None,
+    milk_yield_kg: float | None = None,
+) -> float | None:
+    """
+    Минимальная суточная потребность в усвояемом протеине (уСП / nXP), г/сут.
+
+    GfE: 0,09 × (масса^0,75) × 6,25 + удой × 85 г.
+    """
+    if mass_kg is None or mass_kg <= 0:
+        return None
+    maintenance = 0.09 * (mass_kg**0.75) * 6.25
+    milk = max(float(milk_yield_kg or 0), 0.0) * 85.0
+    return maintenance + milk
+
+
+def gfe_nel_min_mj(
+    mass_kg: float | None,
+    milk_yield_kg: float | None = None,
+) -> float | None:
+    """
+    Минимальная суточная потребность в ЧЭЛ (NEL), МДж/сут.
+
+    GfE 2001: 0,293 × LM^0,75 + удой × 3,3 (MJ NEL на кг молока).
+    """
+    if mass_kg is None or mass_kg <= 0:
+        return None
+    maintenance = NEL_MAINTENANCE_COEFF * (mass_kg**0.75)
+    milk = max(float(milk_yield_kg or 0), 0.0) * NEL_PER_KG_MILK_MJ
+    return maintenance + milk
+
+
+def preview_dynamic_norms(
+    mass_kg: float | None,
+    milk_yield_kg: float | None = None,
+) -> dict[str, Any]:
+    """Расчётные min по GfE для UI (без учёта сохранённых норм)."""
+    _, dynamic = apply_dynamic_norms(
+        {},
+        mass_kg=mass_kg,
+        milk_yield_kg=milk_yield_kg,
+    )
+    return dynamic
+
+
+def apply_dynamic_norms(
+    stored: dict[str, dict[str, float | None]],
+    *,
+    mass_kg: float | None,
+    milk_yield_kg: float | None,
+    ration_type: str | None = None,
+    force_dynamic: bool = False,
+) -> tuple[dict[str, dict[str, float | None]], dict[str, Any]]:
+    """
+    Заполняет нормы по GfE, если в БД min не задан.
+    force_dynamic=True — пересчитать min уСП/ЧЭЛ по массе и удою даже при нормах в БД
+    (автоготовка с явными mass_kg / milk_yield_kg).
+    Возвращает (resolved_norms, dynamic_meta).
+    """
+    del ration_type
+    resolved: dict[str, dict[str, float | None]] = {
+        key: {"min": bounds.get("min"), "max": bounds.get("max")}
+        for key, bounds in stored.items()
+    }
+    dynamic: dict[str, Any] = {}
+
+    for key, compute, formula in (
+        (USP_DYNAMIC_KEY, gfe_usp_min_g, "0.09×масса^0.75×6.25 + удой×85"),
+        (NEL_DYNAMIC_KEY, gfe_nel_min_mj, "0.293×масса^0.75 + удой×3.3"),
+    ):
+        bounds = resolved.get(key, {"min": None, "max": None})
+        if force_dynamic or bounds.get("min") is None:
+            computed = compute(mass_kg, milk_yield_kg)
+            if computed is not None:
+                entry = dict(bounds)
+                entry["min"] = computed
+                resolved[key] = entry
+                dynamic[key] = {"min": computed, "formula": formula}
+
+    return resolved, dynamic