Интегрирован wesp в сайт

WESP_REL/app/lab/calc/gfe_policies.py

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+"""WESP-политики расчёта на базе GfE 2001 (отличия от zootech Excel — осознанные)."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Literal
+
+FeedGroup = Literal["rough", "succulent", "concentrate", "other", "unknown"]
+
+# --- GfE 2001 константы (формулы не меняем) ---
+NEL_Q_COEFF = 0.004
+NEL_Q_REF_PCT = 57.0
+NEL_BASE = 0.6
+
+GE_CP = 0.0239
+GE_FAT = 0.0398
+GE_FIBER = 0.0201
+GE_NFE = 0.0175
+
+ME_FAT = 0.0312
+ME_FIBER = 0.0136
+ME_OR_RESIDUE = 0.0147
+ME_CP = 0.00234
+
+USP_FAT_THRESHOLD_G_PER_KG_DM = 70.0  # 7% СЖ/кг СВ
+
+# DCAB (Na+K)-(Cl+S), мэкв при минералах в г/кг СВ
+DCAB_NA = 43.5
+DCAB_K = 25.6
+DCAB_CL = 28.2
+DCAB_S = 62.4
+
+# Дефолты переваримости при пустых коэфф. (Excel legacy, кроме ОВ)
+DEFAULT_CP_DIGEST_PCT = 86.0
+DEFAULT_FAT_DIGEST_PCT = 75.0
+DEFAULT_FIBER_DIGEST_PCT = 86.0
+DEFAULT_NFE_DIGEST_PCT = 94.0
+DEFAULT_INSOLUBLE_PROTEIN_PCT = 15.0
+DEFAULT_PROTEIN_FRACTION_PCT = 18.9
+
+# WESP: дефолт ВРХ орг. вещ. при пустом поле — по классу корма
+DEFAULT_OMD_ROUGH_PCT = 65.0
+DEFAULT_OMD_SUCCULENT_PCT = 72.0
+DEFAULT_OMD_CONCENTRATE_PCT = 91.0
+
+
+@dataclass(frozen=True)
+class DeriveContext:
+    feed_group: FeedGroup = "unknown"
+    is_main_feed: bool = False
+
+    @classmethod
+    def from_cells(cls, *, main_feed_g: float = 0.0, feed_group: FeedGroup = "unknown") -> DeriveContext:
+        return cls(
+            feed_group=feed_group,
+            is_main_feed=main_feed_g > 0,
+        )
+
+    @classmethod
+    def infer_from_cells(cls, cells: dict[str, float], feed_group: FeedGroup = "unknown") -> DeriveContext:
+        main_feed = cells.get("E", 0.0)
+        return cls.from_cells(main_feed_g=main_feed, feed_group=feed_group)
+
+
+def default_om_digestibility_pct(ctx: DeriveContext | None) -> float:
+    """Дефолт переваримости ОВ (%) при отсутствии ВРХ Орг Вещ."""
+    if ctx is None:
+        return DEFAULT_OMD_CONCENTRATE_PCT
+    if ctx.is_main_feed or ctx.feed_group == "rough":
+        return DEFAULT_OMD_ROUGH_PCT
+    if ctx.feed_group == "succulent":
+        return DEFAULT_OMD_SUCCULENT_PCT
+    return DEFAULT_OMD_CONCENTRATE_PCT
+
+
+def default_digestibility_coefficients() -> dict[str, float]:
+    return {
+        "cp": DEFAULT_CP_DIGEST_PCT,
+        "fat": DEFAULT_FAT_DIGEST_PCT,
+        "fiber": DEFAULT_FIBER_DIGEST_PCT,
+        "nfe": DEFAULT_NFE_DIGEST_PCT,
+        "insoluble_protein": DEFAULT_INSOLUBLE_PROTEIN_PCT,
+        "protein_fraction": DEFAULT_PROTEIN_FRACTION_PCT,
+    }