mirror of https://github.com/craigerl/aprsd.git
100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
import datetime
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import logging
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import threading
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from oslo_config import cfg
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import wrapt
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from aprsd import utils
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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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lock = threading.Lock()
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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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cls._instance._init_store()
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cls._instance.data = {}
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return cls._instance
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def __init__(self, config=None):
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ring_size = CONF.watch_list.packet_keep_count
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if not self.is_enabled():
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LOG.info("Watch List is disabled.")
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if 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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self.data[call] = {
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"last": datetime.datetime.now(),
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"packets": utils.RingBuffer(
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ring_size,
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),
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}
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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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return callsign in self.data
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@wrapt.synchronized(lock)
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def update_seen(self, packet):
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if packet.addresse:
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callsign = packet.addresse
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else:
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callsign = packet.from_call
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if self.callsign_in_watchlist(callsign):
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self.data[callsign]["last"] = datetime.datetime.now()
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self.data[callsign]["packets"].append(packet)
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def last_seen(self, callsign):
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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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return str(now - self.last_seen(callsign))
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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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age = self.age(callsign)
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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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