mirror of https://github.com/craigerl/aprsd.git
123 lines
3.7 KiB
Python
123 lines
3.7 KiB
Python
import datetime
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import logging
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from oslo_config import cfg
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from aprsd import utils
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from aprsd.packets import collector, core
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from aprsd.utils import objectstore
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CONF = cfg.CONF
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LOG = logging.getLogger("APRSD")
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class WatchList(objectstore.ObjectStoreMixin):
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"""Global watch list and info for callsigns."""
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_instance = None
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data = {}
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def __new__(cls, *args, **kwargs):
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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return cls._instance
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def __init__(self):
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super().__init__()
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self._update_from_conf()
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def _update_from_conf(self, config=None):
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with self.lock:
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if CONF.watch_list.enabled and CONF.watch_list.callsigns:
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for callsign in CONF.watch_list.callsigns:
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call = callsign.replace("*", "")
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# FIXME(waboring) - we should fetch the last time we saw
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# a beacon from a callsign or some other mechanism to find
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# last time a message was seen by aprs-is. For now this
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# is all we can do.
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if call not in self.data:
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self.data[call] = {
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"last": None,
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"packet": None,
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}
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def stats(self, serializable=False) -> dict:
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stats = {}
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with self.lock:
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for callsign in self.data:
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stats[callsign] = {
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"last": self.data[callsign]["last"],
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"packet": self.data[callsign]["packet"],
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"age": self.age(callsign),
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"old": self.is_old(callsign),
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}
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return stats
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def is_enabled(self):
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return CONF.watch_list.enabled
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def callsign_in_watchlist(self, callsign):
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with self.lock:
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return callsign in self.data
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def rx(self, packet: type[core.Packet]) -> None:
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"""Track when we got a packet from the network."""
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callsign = packet.from_call
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if self.callsign_in_watchlist(callsign):
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with self.lock:
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self.data[callsign]["last"] = datetime.datetime.now()
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self.data[callsign]["packet"] = packet
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def tx(self, packet: type[core.Packet]) -> None:
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"""We don't care about TX packets."""
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def last_seen(self, callsign):
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with self.lock:
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if self.callsign_in_watchlist(callsign):
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return self.data[callsign]["last"]
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def age(self, callsign):
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now = datetime.datetime.now()
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last_seen_time = self.last_seen(callsign)
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if last_seen_time:
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return str(now - last_seen_time)
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else:
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return None
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def max_delta(self, seconds=None):
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if not seconds:
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seconds = CONF.watch_list.alert_time_seconds
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max_timeout = {"seconds": seconds}
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return datetime.timedelta(**max_timeout)
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def is_old(self, callsign, seconds=None):
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"""Watch list callsign last seen is old compared to now?
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This tests to see if the last time we saw a callsign packet,
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if that is older than the allowed timeout in the config.
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We put this here so any notification plugin can use this
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same test.
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"""
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if not self.callsign_in_watchlist(callsign):
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return False
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age = self.age(callsign)
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if age:
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delta = utils.parse_delta_str(age)
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d = datetime.timedelta(**delta)
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max_delta = self.max_delta(seconds=seconds)
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if d > max_delta:
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return True
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else:
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return False
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else:
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return False
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collector.PacketCollector().register(WatchList)
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