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https://github.com/dcs-liberation/dcs_liberation.git
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75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
from dataclasses import dataclass
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from enum import auto, IntEnum
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import json
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from pathlib import Path
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from typing import Iterable, Optional
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from gen.radios import RadioFrequency
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from gen.tacan import TacanBand, TacanChannel
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BEACONS_RESOURCE_PATH = Path("resources/dcs/beacons")
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class BeaconType(IntEnum):
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BEACON_TYPE_NULL = auto()
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BEACON_TYPE_VOR = auto()
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BEACON_TYPE_DME = auto()
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BEACON_TYPE_VOR_DME = auto()
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BEACON_TYPE_TACAN = auto()
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BEACON_TYPE_VORTAC = auto()
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BEACON_TYPE_RSBN = auto()
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BEACON_TYPE_BROADCAST_STATION = auto()
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BEACON_TYPE_HOMER = auto()
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BEACON_TYPE_AIRPORT_HOMER = auto()
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BEACON_TYPE_AIRPORT_HOMER_WITH_MARKER = auto()
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BEACON_TYPE_ILS_FAR_HOMER = auto()
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BEACON_TYPE_ILS_NEAR_HOMER = auto()
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BEACON_TYPE_ILS_LOCALIZER = auto()
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BEACON_TYPE_ILS_GLIDESLOPE = auto()
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BEACON_TYPE_PRMG_LOCALIZER = auto()
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BEACON_TYPE_PRMG_GLIDESLOPE = auto()
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BEACON_TYPE_ICLS_LOCALIZER = auto()
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BEACON_TYPE_ICLS_GLIDESLOPE = auto()
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BEACON_TYPE_NAUTICAL_HOMER = auto()
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@dataclass(frozen=True)
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class Beacon:
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name: str
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callsign: str
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beacon_type: BeaconType
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hertz: int
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channel: Optional[int]
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@property
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def frequency(self) -> RadioFrequency:
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return RadioFrequency(self.hertz)
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@property
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def is_tacan(self) -> bool:
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return self.beacon_type in (
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BeaconType.BEACON_TYPE_VORTAC,
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BeaconType.BEACON_TYPE_TACAN,
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)
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@property
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def tacan_channel(self) -> TacanChannel:
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assert self.is_tacan
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assert self.channel is not None
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return TacanChannel(self.channel, TacanBand.X)
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def load_beacons_for_terrain(name: str) -> Iterable[Beacon]:
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beacons_file = BEACONS_RESOURCE_PATH / f"{name.lower()}.json"
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if not beacons_file.exists():
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raise RuntimeError(f"Beacon file {beacons_file.resolve()} is missing")
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for beacon in json.loads(beacons_file.read_text()):
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yield Beacon(**beacon)
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