add electricity tariff westfalen wind (#3017)

* add westfalen wind

* imrpove

Author: LKuemmel

packages/modules/electricity_pricing/flexible_tariffs/westfalen_wind/__init__.py

@@ -0,0 +1,39 @@
+from typing import Optional
+
+
+class WestfalenWindToken():
+    def __init__(self,
+                 access_token: Optional[str] = None,
+                 refresh_token: Optional[str] = None,
+                 token_type: Optional[str] = None,
+                 expires: Optional[int] = None,
+                 created_at: Optional[float] = None) -> None:
+        self.access_token = access_token  # don't show in UI
+        self.refresh_token = refresh_token  # don't show in UI
+        self.token_type = token_type  # don't show in UI
+        self.expires = expires  # don't show in UI
+        self.created_at = created_at  # don't show in UI
+
+
+class WestfalenWindTariffConfiguration:
+    def __init__(self,
+                 username: Optional[str] = None,
+                 password: Optional[str] = None,
+                 contract_id: Optional[str] = None,
+                 token: WestfalenWindToken = None):
+        self.username = username
+        self.password = password
+        self.contract_id = contract_id
+        self.token = token or WestfalenWindToken()
+
+
+class WestfalenWindTariff:
+    def __init__(self,
+                 name: str = "WestfalenWind",
+                 type: str = "westfalen_wind",
+                 official: bool = True,
+                 configuration: WestfalenWindTariffConfiguration = None) -> None:
+        self.name = name
+        self.type = type
+        self.official = official
+        self.configuration = configuration or WestfalenWindTariffConfiguration()

packages/modules/electricity_pricing/flexible_tariffs/westfalen_wind/config.py

@@ -0,0 +1,156 @@
+#!/usr/bin/env python3
+import datetime
+import logging
+from typing import Dict
+import pytz
+from requests.exceptions import HTTPError
+
+
+from dataclass_utils import asdict
+from helpermodules import timecheck
+from helpermodules.pub import Pub
+from modules.common import req
+from modules.common.abstract_device import DeviceDescriptor
+from modules.common.component_state import TariffState
+from modules.electricity_pricing.flexible_tariffs.westfalen_wind.config import WestfalenWindTariff, WestfalenWindToken
+
+log = logging.getLogger(__name__)
+
+
+def validate_token(config: WestfalenWindTariff) -> None:
+    """Prüft ob ein gültiger Token vorhanden ist, ansonsten wird ein neuer abgerufen."""
+    if (config.configuration.token.access_token and
+        config.configuration.token.expires and
+            config.configuration.token.created_at):
+
+        # Prüfe ob Token noch gültig ist (mit 5 Min Puffer)
+        expires_timestamp = config.configuration.token.created_at + config.configuration.token.expires - 300
+        current_timestamp = timecheck.create_timestamp()
+
+        if current_timestamp < expires_timestamp:
+            log.debug("Access Token ist noch gültig.")
+            return
+        else:
+            log.debug("Access Token ist abgelaufen. Versuche Refresh Token.")
+            if config.configuration.token.refresh_token:
+                _refresh_token(config)
+            else:
+                _authenticate(config)
+    else:
+        log.debug("Kein gültiger Token vorhanden. Authentifizierung erforderlich.")
+        _authenticate(config)
+
+
+def _authenticate(config: WestfalenWindTariff) -> None:
+    """Authentifizierung mit Benutzername und Passwort."""
+    if not config.configuration.username or not config.configuration.password:
+        raise ValueError("Benutzername und Passwort sind für die Authentifizierung erforderlich.")
+
+    data = {
+        'grant_type': 'password',
+        'username': config.configuration.username,
+        'password': config.configuration.password
+    }
+    token_data = req.get_http_session().post(
+        'https://api.wws.tarifdynamik.de/public/tokens',
+        data=data,
+        headers={'Content-Type': 'application/x-www-form-urlencoded'}
+    ).json()
+
+    config.configuration.token = WestfalenWindToken(
+        access_token=token_data.get("access_token"),
+        refresh_token=token_data.get("refresh_token"),
+        token_type=token_data.get("token_type", "Bearer"),
+        expires=token_data.get("expires"),
+        created_at=timecheck.create_timestamp()
+    )
+    Pub().pub("openWB/set/optional/ep/flexible_tariff/provider", asdict(config))
+    log.debug("Erfolgreich authentifiziert.")
+
+
+def _refresh_token(config: WestfalenWindTariff) -> None:
+    """Erneuert den Access Token mit dem Refresh Token."""
+    if not config.configuration.token.refresh_token:
+        log.debug("Kein Refresh Token vorhanden. Führe neue Authentifizierung durch.")
+        _authenticate(config)
+        return
+
+    data = {
+        'grant_type': 'refresh_token',
+        'refresh_token': config.configuration.token.refresh_token
+    }
+    try:
+        token_data = req.get_http_session().post(
+            'https://api.wws.tarifdynamik.de/public/tokens',
+            data=data,
+            headers={'Content-Type': 'application/x-www-form-urlencoded'}
+        ).json()
+        config.configuration.token = WestfalenWindToken(
+            access_token=token_data.get("access_token"),
+            refresh_token=token_data.get("refresh_token"),
+            token_type=token_data.get("token_type", "Bearer"),
+            expires=token_data.get("expires"),
+            created_at=timecheck.create_timestamp()
+        )
+        Pub().pub("openWB/set/optional/ep/flexible_tariff/provider", asdict(config))
+        log.debug("Token erfolgreich erneuert.")
+    except HTTPError as e:
+        log.error(f"Token-Erneuerung fehlgeschlagen: {e}. Führe neue Authentifizierung durch.")
+        _authenticate(config)
+
+
+def _get_raw_prices(config: WestfalenWindTariff):
+    headers = {
+        "Content-Type": "application/json",
+        "Authorization": f"{config.configuration.token.token_type} {config.configuration.token.access_token}"
+    }
+    now = datetime.datetime.now(pytz.timezone("Europe/Berlin"))
+    start_of_today = now.replace(hour=0, minute=0, second=0, microsecond=0)
+    end_of_tomorrow = start_of_today + datetime.timedelta(days=2) - datetime.timedelta(minutes=15)
+    filters = [
+        f"valid_from:gte:{now.isoformat()}",
+        f"valid_from:lte:{end_of_tomorrow.isoformat()}"
+    ]
+    params = {
+        'page_size': 200,  # Maximal 200 Einträge (2 Tage * 96 Viertelstunden)
+        'sort': 'valid_from:asc',
+        'filters': filters
+    }
+    if config.configuration.contract_id:
+        params['contract_id'] = config.configuration.contract_id
+
+    return req.get_http_session().get(
+        "https://api.wws.tarifdynamik.de/public/energyprices",
+        headers=headers,
+        params=params
+    ).json()
+
+
+def fetch(config: WestfalenWindTariff) -> Dict[str, float]:
+    validate_token(config)
+    try:
+        raw_data = _get_raw_prices(config)
+    except HTTPError as error:
+        if error.response.status_code == 401:
+            log.debug("401 Unauthorized - Token ungültig. Versuche Erneuerung.")
+            _authenticate(config)
+            raw_data = _get_raw_prices(config)
+        else:
+            raise error
+    prices: Dict[str, float] = {}
+    for price_entry in raw_data['data']:
+        timestamp = int(datetime.datetime.fromisoformat(price_entry['start'].replace('Z', '+00:00')).timestamp())
+        price_euro_per_wh = price_entry['price_ct_kwh'] / 100000
+        prices[str(timestamp)] = price_euro_per_wh
+    return prices
+
+
+def create_electricity_tariff(config: WestfalenWindTariff):
+    validate_token(config)
+
+    def updater():
+        return TariffState(prices=fetch(config))
+    return updater
+
+
+device_descriptor = DeviceDescriptor(configuration_factory=WestfalenWindTariff)