ske087
bff6d70b17
Aplicatie Flask + SQLite pentru productie alimentara: cantarirea componentelor unui produs finit si tiparirea etichetei prin QZ Tray. - produse finite (retete) formate din componente cantarite - designer vizual de etichete (mm/px, zona sigura, campuri variabile, cod QR cu continut din mai multe bucati) - legare produs finit -> sablon de eticheta - navigare pe doua taburi: Cantarire / Setari - administrare: componente, produse finite, sabloane, campuri, istoric - backup, resetare baza de date, checklist de pregatire, /healthz - CLI de administrare si serviciu systemd pentru productie - vendor/syncpulse-scale-bridge (GPL-3.0-or-later) pentru citirea cantarului
59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
"""Unitati de masa, normalizare si conversii.
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Etichetele de produs finit sunt exprimate de obicei in grame, iar cantarul
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poate raporta kilograme. Toate cantaririle sunt convertite in unitatea retetei
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inainte de a fi salvate.
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"""
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from __future__ import annotations
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from typing import Optional
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# Unitati acceptate, in ordinea afisata in interfata.
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UNITS: tuple[str, ...] = ("g", "kg", "mg", "t", "lb", "oz")
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GRAMS_PER: dict[str, float] = {
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"g": 1.0,
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"kg": 1000.0,
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"mg": 0.001,
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"t": 1_000_000.0,
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"lb": 453.59237,
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"oz": 28.349523125,
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}
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ALIASES: dict[str, str] = {
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"gr": "g", "gram": "g", "grame": "g", "grams": "g",
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"kg": "kg", "kgs": "kg", "kilogram": "kg", "kilograme": "kg",
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"mg": "mg", "miligram": "mg", "miligrame": "mg",
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"t": "t", "tona": "t", "ton": "t", "to": "t",
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"lb": "lb", "lbs": "lb", "pound": "lb",
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"oz": "oz", "ounce": "oz",
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}
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def normalize_unit(value: object, default: str = "g") -> str:
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text = str(value or "").strip().lower()
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if not text:
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return default
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return ALIASES.get(text, text if text in GRAMS_PER else default)
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def convert(value: float, from_unit: str, to_unit: str) -> Optional[float]:
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"""Converteste intre unitati de masa; None daca una nu este unitate de masa."""
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source = GRAMS_PER.get(from_unit)
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target = GRAMS_PER.get(to_unit)
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if source is None or target is None:
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return None
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return value * source / target
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def format_weight(value: object, decimals: int = 3) -> str:
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"""Formatare pentru etichete: fara zerouri finale inutile."""
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try:
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number = float(value) # type: ignore[arg-type]
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except (TypeError, ValueError):
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return str(value)
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text = f"{number:.{int(decimals)}f}"
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if "." in text:
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text = text.rstrip("0").rstrip(".")
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return text or "0"
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