128 lines
3.3 KiB
Python
128 lines
3.3 KiB
Python
"""Client Open-Meteo (gratuit, sans clé API)."""
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import json
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import os
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from datetime import datetime, timezone
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from pathlib import Path
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from typing import Any
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import httpx
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CACHE_PATH = Path(os.environ.get("UPLOAD_DIR", "/data")).parent / "meteo_cache.json"
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CACHE_TTL_SECONDS = 3 * 3600 # 3h
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WMO_LABELS = {
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0: "Ensoleillé",
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1: "Principalement ensoleillé",
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2: "Partiellement nuageux",
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3: "Couvert",
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45: "Brouillard",
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48: "Brouillard givrant",
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51: "Bruine légère",
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53: "Bruine modérée",
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55: "Bruine dense",
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61: "Pluie légère",
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63: "Pluie modérée",
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65: "Pluie forte",
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71: "Neige légère",
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73: "Neige modérée",
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75: "Neige forte",
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80: "Averses légères",
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81: "Averses modérées",
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82: "Averses violentes",
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85: "Averses de neige",
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95: "Orage",
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96: "Orage avec grêle",
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99: "Orage violent",
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}
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WMO_ICONS = {
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0: "☀️",
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1: "🌤",
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2: "⛅",
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3: "☁️",
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45: "🌫",
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48: "🌫",
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51: "🌦",
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53: "🌦",
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55: "🌧",
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61: "🌦",
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63: "🌧",
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65: "🌧",
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71: "🌨",
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73: "🌨",
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75: "❄️",
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80: "🌦",
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81: "🌧",
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82: "⛈",
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85: "🌨",
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95: "⛈",
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96: "⛈",
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99: "⛈",
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}
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def _cache_fresh() -> dict | None:
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if not CACHE_PATH.exists():
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return None
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try:
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data = json.loads(CACHE_PATH.read_text())
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cached_at = datetime.fromisoformat(
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data.get("cached_at", "2000-01-01T00:00:00+00:00")
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)
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if (datetime.now(timezone.utc) - cached_at).total_seconds() < CACHE_TTL_SECONDS:
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return data
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except Exception:
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pass
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return None
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def fetch_forecast(
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lat: float = 45.14, lon: float = 4.12, days: int = 14
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) -> dict[str, Any]:
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cached = _cache_fresh()
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if cached:
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return cached
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url = "https://api.open-meteo.com/v1/forecast"
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params = {
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"latitude": lat,
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"longitude": lon,
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"daily": "temperature_2m_max,temperature_2m_min,precipitation_sum,windspeed_10m_max,weathercode",
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"timezone": "Europe/Paris",
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"forecast_days": min(days, 16),
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}
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try:
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r = httpx.get(url, params=params, timeout=10)
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r.raise_for_status()
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raw = r.json()
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except Exception as e:
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return {"error": str(e), "days": []}
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daily = raw.get("daily", {})
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dates = daily.get("time", [])
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result_days = []
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for i, d in enumerate(dates):
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code = int(daily.get("weathercode", [0] * len(dates))[i] or 0)
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result_days.append(
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{
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"date": d,
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"t_max": daily.get("temperature_2m_max", [None] * len(dates))[i],
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"t_min": daily.get("temperature_2m_min", [None] * len(dates))[i],
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"pluie_mm": daily.get("precipitation_sum", [0] * len(dates))[i] or 0,
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"vent_kmh": daily.get("windspeed_10m_max", [0] * len(dates))[i] or 0,
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"code": code,
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"label": WMO_LABELS.get(code, "Inconnu"),
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"icone": WMO_ICONS.get(code, "🌡"),
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}
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)
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data = {
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"cached_at": datetime.now(timezone.utc).isoformat(),
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"days": result_days,
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}
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try:
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CACHE_PATH.parent.mkdir(parents=True, exist_ok=True)
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CACHE_PATH.write_text(json.dumps(data, ensure_ascii=False))
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except Exception:
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pass
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return data
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