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#!/usr/bin/env python3
import datetime
from collections import defaultdict
import enum
import logging
import re
import sys
from typing import Dict, List
# Note: this module is fairly early loaded. Be aware of dependencies.
import argparse_utils
import bootstrap
import config
logger = logging.getLogger(__name__)
cfg = config.add_commandline_args(
f"Presence Detection ({__file__})",
"Args related to detection of human beings in locations.",
)
cfg.add_argument(
"--presence_macs_file",
type=argparse_utils.valid_filename,
default = "/home/scott/cron/persisted_mac_addresses.txt",
metavar="FILENAME",
help="The location of persisted_mac_addresses.txt to use."
)
class Person(enum.Enum):
UNKNOWN = 0
SCOTT = 1
LYNN = 2
ALEX = 3
AARON_AND_DANA = 4
AARON = 4
DANA = 4
@enum.unique
class Location(enum.Enum):
UNKNOWN = 0
HOUSE = 1
CABIN = 2
class PresenceDetection(object):
def __init__(self) -> None:
# Note: list most important devices first.
self.devices_by_person: Dict[Person, List[str]] = {
Person.SCOTT: [
"3C:28:6D:10:6D:41", # pixel3
"6C:40:08:AE:DC:2E", # laptop
],
Person.LYNN: [
"08:CC:27:63:26:14", # motog7
"B8:31:B5:9A:4F:19", # laptop
],
Person.ALEX: [
"0C:CB:85:0C:8B:AE", # phone
"D0:C6:37:E3:36:9A", # laptop
],
Person.AARON_AND_DANA: [
"98:B6:E9:E5:5A:7C",
"D6:2F:37:CA:B2:9B",
"6C:E8:5C:ED:17:26",
"90:E1:7B:13:7C:E5",
"6E:DC:7C:75:02:1B",
"B2:16:1A:93:7D:50",
"18:65:90:DA:3A:35",
"22:28:C8:7D:3C:85",
"B2:95:23:69:91:F8",
"96:69:2C:88:7A:C3",
],
}
self.weird_mac_at_cabin = False
self.location_ts_by_mac: Dict[
Location, Dict[str, datetime.datetime]
] = defaultdict(dict)
self.names_by_mac: Dict[str, str] = {}
self.update()
def update(self) -> None:
from exec_utils import cmd_with_timeout
try:
persisted_macs = config.config['presence_macs_file']
except KeyError:
persisted_macs = '/home/scott/cron/persisted_mac_addresses.txt'
self.read_persisted_macs_file(persisted_macs, Location.HOUSE)
try:
raw = cmd_with_timeout(
"ssh [email protected] 'cat /home/scott/cron/persisted_mac_addresses.txt'",
timeout_seconds=10.0,
)
self.parse_raw_macs_file(raw, Location.CABIN)
except Exception as e:
logger.exception(e)
logger.error(
'Unable to fetch MAC Addresses from meerkat; can\'t do proper presence detection.'
)
sys.exit(1)
def read_persisted_macs_file(
self, filename: str, location: Location
) -> None:
if location is Location.UNKNOWN:
return
with open(filename, "r") as rf:
lines = rf.read()
self.parse_raw_macs_file(lines, location)
def parse_raw_macs_file(self, raw: str, location: Location) -> None:
lines = raw.split("\n")
# CC:F4:11:D7:FA:EE, 2240, 10.0.0.22 (side_deck_high_home), Google, 1611681990
cabin_count = 0
for line in lines:
line = line.strip()
if len(line) == 0:
continue
logger.debug(f'{location}> {line}')
if "cabin_" in line:
continue
if location == Location.CABIN:
logger.debug('Cabin count: {cabin_count}')
cabin_count += 1
try:
(mac, count, ip_name, mfg, ts) = line.split(",")
except Exception as e:
logger.error(f'SKIPPED BAD LINE> {line}')
logger.exception(e)
continue
mac = mac.strip()
(self.location_ts_by_mac[location])[
mac
] = datetime.datetime.fromtimestamp(int(ts.strip()))
ip_name = ip_name.strip()
match = re.match(r"(\d+\.\d+\.\d+\.\d+) +\(([^\)]+)\)", ip_name)
if match is not None:
name = match.group(2)
self.names_by_mac[mac] = name
if cabin_count > 0:
logger.debug('Weird MAC at the cabin')
self.weird_mac_at_cabin = True
def is_anyone_in_location_now(self, location: Location) -> bool:
for person in Person:
if person is not None:
loc = self.where_is_person_now(person)
if location == loc:
return True
if location == location.CABIN and self.weird_mac_at_cabin:
return True
return False
def where_is_person_now(self, name: Person) -> Location:
import dict_utils
logger.debug(f'Looking for {name}...')
if name is Person.UNKNOWN:
if self.weird_mac_at_cabin:
return Location.CABIN
else:
return Location.UNKNOWN
votes: Dict[Location, int] = {}
tiebreaks: Dict[Location, datetime.datetime] = {}
credit = 10000
for mac in self.devices_by_person[name]:
if mac not in self.names_by_mac:
continue
mac_name = self.names_by_mac[mac]
logger.debug(f'Looking for {name}... check for mac {mac} ({mac_name})')
for location in self.location_ts_by_mac:
if mac in self.location_ts_by_mac[location]:
ts = (self.location_ts_by_mac[location])[mac]
logger.debug(f'Seen {mac} ({mac_name}) at {location} since {ts}')
tiebreaks[location] = ts
(most_recent_location, first_seen_ts) = dict_utils.item_with_max_value(tiebreaks)
bonus = credit
v = votes.get(most_recent_location, 0)
votes[most_recent_location] = v + bonus
logger.debug(f'{name}: {location} gets {bonus} votes.')
credit = int(
credit * 0.2
) # Note: list most important devices first
if credit <= 0:
credit = 1
if len(votes) > 0:
(location, value) = dict_utils.item_with_max_value(votes)
if value > 2001:
return location
return Location.UNKNOWN
@bootstrap.initialize
def main() -> None:
p = PresenceDetection()
for person in Person:
print(f'{person} => {p.where_is_person_now(person)}')
print()
for location in Location:
print(f'{location} => {p.is_anyone_in_location_now(location)}')
if __name__ == '__main__':
main()
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