Implement fixed hour tariffs functionality

packages/modules/electricity_tariffs/fixedhours/config.py

@@ -0,0 +1,38 @@
+from typing import Optional, List, Dict
+
+
+class FixedHoursTariffConfiguration:
+    def __init__(self, default_price: Optional[float] = None, tariffs: Optional[List[Dict[str, any]]] = None):
+        self.default_price = default_price
+        self.tariffs = tariffs
+        '''
+        Example configuration:
+        "tariffs": [
+            {
+                "name": "high_tariff",
+                "price": 0.20,
+                "active_times": {
+                    "quarters": [1, 2, 3, 4],  # applicable quarters
+                    "times": [("08:00", "12:00"), ("18:00", "22:00")]  # active times during the day
+                }
+            },
+            {
+                "name": "low_tariff",
+                "price": 0.05,
+                "active_times": {
+                    "quarters": [1, 2, 3, 4],  # applicable quarters
+                    "times": [("00:00", "06:00"), ("22:00", "23:59")]  # active times during the day
+                }
+            }
+        ]
+        '''
+
+
+class FixedHoursTariff:
+    def __init__(self,
+                 name: str = "Feste Tarifstunden (z.b. §14a EnWG Modul3)",
+                 type: str = "fixedhours",
+                 configuration: FixedHoursTariffConfiguration = None) -> None:
+        self.name = name
+        self.type = type
+        self.configuration = configuration or FixedHoursTariffConfiguration()

packages/modules/electricity_tariffs/fixedhours/tariff.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+import logging
+import datetime
+import time
+
+from modules.electricity_tariffs.fixedhours.config import FixedHoursTariff, FixedHoursTariffConfiguration
+from modules.common.abstract_device import DeviceDescriptor
+from modules.common.component_state import TariffState
+# from modules.common.configurable_tariff import ConfigurableTariff
+
+log = logging.getLogger(__name__)
+
+
+def to_time(time_str):
+    return datetime.datetime.strptime(time_str, "%H:%M").time()
+
+
+def validate_tariff_times(config):
+    time_slots = []
+    for tariff in config.tariffs:
+        for start, end in tariff["active_times"]["times"]:
+            start_time = to_time(start)
+            end_time = to_time(end)
+            for existing_start, existing_end in time_slots:
+                if (start_time < existing_end and end_time > existing_start):
+                    raise ValueError(f"Overlapping time window detected: {start} - {end} in tariff '{tariff['name']}'")
+            time_slots.append((start_time, end_time))
+
+
+def fetch(config: FixedHoursTariffConfiguration) -> None:
+    validate_tariff_times(config)
+
+    current_time = datetime.datetime.now().replace(minute=0, second=0, microsecond=0)
+    prices = {}
+
+    for i in range(24):  # get prices for the next 24 hours
+        time_slot = current_time + datetime.timedelta(hours=i)
+        epoch_time = int(time.mktime(time_slot.timetuple()))
+        quarter = (current_time.month - 1) // 3 + 1
+        price = config.default_price/1000
+
+        for tariff in config.tariffs:
+            active_times = [(to_time(start), to_time(end)) for start, end in tariff["active_times"]["times"]]
+            if (any(start <= time_slot.time() < end for start, end in active_times) and
+                    quarter in tariff["active_times"]["quarters"]):
+                price = tariff["price"]/1000
+                break  # Break since we found a matching tariff
+
+        prices[str(epoch_time)] = price
+
+    return TariffState(prices=prices)
+
+
+def create_electricity_tariff(config: FixedHoursTariff):
+    def updater():
+        return fetch(config.configuration)
+    return updater
+
+
+device_descriptor = DeviceDescriptor(configuration_factory=FixedHoursTariff)