from owrx.config import Config from urllib import request import json from datetime import datetime, timedelta import logging import threading from owrx.map import Map, LatLngLocation from owrx.aprs import AprsParser, AprsLocation from abc import ABC, abstractmethod logger = logging.getLogger(__name__) class Enricher(ABC): def __init__(self, parser): self.parser = parser @abstractmethod def enrich(self, meta, callback): pass class RadioIDCache(object): sharedInstance = None @staticmethod def getSharedInstance(): if RadioIDCache.sharedInstance is None: RadioIDCache.sharedInstance = RadioIDCache() return RadioIDCache.sharedInstance def __init__(self): self.cache = {} self.cacheTimeout = timedelta(seconds=86400) def isValid(self, mode, radio_id): key = self.__key(mode, radio_id) if key not in self.cache: return False entry = self.cache[key] return entry["timestamp"] + self.cacheTimeout > datetime.now() def __key(self, mode, radio_id): return "{}-{}".format(mode, radio_id) def put(self, mode, radio_id, value): self.cache[self.__key(mode, radio_id)] = {"timestamp": datetime.now(), "data": value} def get(self, mode, radio_id): if not self.isValid(mode, radio_id): return None return self.cache[self.__key(mode, radio_id)]["data"] class RadioIDEnricher(Enricher): def __init__(self, mode, parser): super().__init__(parser) self.mode = mode self.threads = {} self.callbacks = {} def _fillCache(self, id): data = self._downloadRadioIdData(id) RadioIDCache.getSharedInstance().put(self.mode, id, data) if id in self.callbacks: while self.callbacks[id]: self.callbacks[id].pop()(data) del self.callbacks[id] del self.threads[id] def _downloadRadioIdData(self, id): try: logger.debug("requesting radioid metadata for mode=%s and id=%s", self.mode, id) res = request.urlopen("https://www.radioid.net/api/{0}/user/?id={1}".format(self.mode, id), timeout=30) if res.status != 200: logger.warning("radioid API returned error %i for mode=%s and id=%s", res.status, self.mode, id) return None data = json.loads(res.read().decode("utf-8")) if "count" in data and data["count"] > 0 and "results" in data: for item in data["results"]: if "id" in item and item["id"] == id: return item except json.JSONDecodeError: logger.warning("unable to parse radioid response JSON") return None def enrich(self, meta, callback): config_key = "digital_voice_{}_id_lookup".format(self.mode) if not Config.get()[config_key]: return meta if "source" not in meta: return meta id = int(meta["source"]) cache = RadioIDCache.getSharedInstance() if not cache.isValid(self.mode, id): if id not in self.threads: self.threads[id] = threading.Thread(target=self._fillCache, args=[id], daemon=True) self.threads[id].start() if id not in self.callbacks: self.callbacks[id] = [] def onFinish(data): if data is not None: meta["additional"] = data callback(meta) self.callbacks[id].append(onFinish) return meta data = cache.get(self.mode, id) if data is not None: meta["additional"] = data return meta class YsfMetaEnricher(Enricher): def enrich(self, meta, callback): for key in ["source", "up", "down", "target"]: if key in meta: meta[key] = meta[key].strip() for key in ["lat", "lon"]: if key in meta: meta[key] = float(meta[key]) if "source" in meta and "lat" in meta and "lon" in meta: loc = LatLngLocation(meta["lat"], meta["lon"]) Map.getSharedInstance().updateLocation(meta["source"], loc, "YSF", self.parser.getBand()) return meta class DStarEnricher(Enricher): def enrich(self, meta, callback): for key in ["lat", "lon"]: if key in meta: meta[key] = float(meta[key]) if "ourcall" in meta and "lat" in meta and "lon" in meta: loc = LatLngLocation(meta["lat"], meta["lon"]) Map.getSharedInstance().updateLocation(meta["ourcall"], loc, "D-Star", self.parser.getBand()) if "dprs" in meta: try: # we can send the DPRS stuff through our APRS parser to extract the information # TODO: only third-party parsing accepts this format right now parser = AprsParser() dprsData = parser.parseThirdpartyAprsData(meta["dprs"]) if "data" in dprsData: data = dprsData["data"] if "lat" in data and "lon" in data: # TODO: we could actually get the symbols from the parsed APRS data and show that on the meta panel meta["lat"] = data["lat"] meta["lon"] = data["lon"] if "ourcall" in meta: # send location info to map as well (it will show up with the correct symbol there!) loc = AprsLocation(data) Map.getSharedInstance().updateLocation(meta["ourcall"], loc, "DPRS", self.parser.getBand()) except Exception: logger.exception("Error while parsing DPRS data") return meta class MetaParser: def __init__(self, handler): self.handler = handler self.enrichers = { "DMR": RadioIDEnricher("dmr", self), "YSF": YsfMetaEnricher(self), "DSTAR": DStarEnricher(self), "NXDN": RadioIDEnricher("nxdn", self), } self.currentMetaData = None def parse(self, raw: memoryview): try: raw = raw.tobytes().decode("utf-8").rstrip("\n") except UnicodeError: logger.warning("unable to decode meta binary: %s", str(raw.tobytes())) return for meta in raw.split("\n"): fields = meta.split(";") meta = {v[0]: ":".join(v[1:]) for v in map(lambda x: x.split(":"), fields) if v[0] != ""} self.currentMetaData = None if "protocol" in meta: protocol = meta["protocol"] if protocol in self.enrichers: self.currentMetaData = meta = self.enrichers[protocol].enrich(meta, self.receive) self.handler.write_metadata(meta) def receive(self, meta): # we may have moved on in the meantime if meta is not self.currentMetaData: return self.handler.write_metadata(meta)