presence.py

   1 #!/usr/bin/env python3
   2
   3 import datetime
   4 from collections import defaultdict
   5 import enum
   6 import logging
   7 import re
   8 from typing import Dict, List
   9
  10 import argparse_utils
  11 import bootstrap
  12 import config
  13
  14 logger = logging.getLogger(__name__)
  15
  16 cfg = config.add_commandline_args(
  17     f"Presence Detection ({__file__})",
  18     "Args related to detection of human beings in locations.",
  19 )
  20 cfg.add_argument(
  21     "--presence_macs_file",
  22     type=argparse_utils.valid_filename,
  23     default = "/home/scott/cron/persisted_mac_addresses.txt",
  24     metavar="FILENAME",
  25     help="The location of persisted_mac_addresses.txt to use."
  26 )
  27
  28
  29 class Person(enum.Enum):
  30     UNKNOWN = 0
  31     SCOTT = 1
  32     LYNN = 2
  33     ALEX = 3
  34     AARON_AND_DANA = 4
  35     AARON = 4
  36     DANA = 4
  37
  38
  39 @enum.unique
  40 class Location(enum.Enum):
  41     UNKNOWN = 0
  42     HOUSE = 1
  43     CABIN = 2
  44
  45
  46 class PresenceDetection(object):
  47     def __init__(self) -> None:
  48         # Note: list most important devices first.
  49         self.devices_by_person: Dict[Person, List[str]] = {
  50             Person.SCOTT: [
  51                 "3C:28:6D:10:6D:41",
  52                 "D4:61:2E:88:18:09",
  53                 "6C:40:08:AE:DC:2E",
  54                 "14:7D:DA:6A:20:D7",
  55             ],
  56             Person.LYNN: [
  57                 "08:CC:27:63:26:14",
  58                 "B8:31:B5:9A:4F:19",
  59             ],
  60             Person.ALEX: [
  61                 "0C:CB:85:0C:8B:AE",
  62                 "D0:C6:37:E3:36:9A",
  63             ],
  64             Person.AARON_AND_DANA: [
  65                 "98:B6:E9:E5:5A:7C",
  66                 "D6:2F:37:CA:B2:9B",
  67                 "6C:E8:5C:ED:17:26",
  68                 "90:E1:7B:13:7C:E5",
  69                 "6E:DC:7C:75:02:1B",
  70                 "B2:16:1A:93:7D:50",
  71                 "18:65:90:DA:3A:35",
  72                 "22:28:C8:7D:3C:85",
  73                 "B2:95:23:69:91:F8",
  74                 "96:69:2C:88:7A:C3",
  75             ],
  76         }
  77         self.weird_mac_at_cabin = False
  78         self.location_ts_by_mac: Dict[
  79             Location, Dict[str, datetime.datetime]
  80         ] = defaultdict(dict)
  81         self.names_by_mac: Dict[str, str] = {}
  82         self.update()
  83
  84     def update(self) -> None:
  85         from exec_utils import cmd
  86         persisted_macs = config.config['presence_macs_file']
  87         self.read_persisted_macs_file(persisted_macs, Location.HOUSE)
  88         raw = cmd(
  89             "ssh [email protected] 'cat /home/scott/cron/persisted_mac_addresses.txt'"
  90         )
  91         self.parse_raw_macs_file(raw, Location.CABIN)
  92
  93     def read_persisted_macs_file(
  94         self, filename: str, location: Location
  95     ) -> None:
  96         if location is Location.UNKNOWN:
  97             return
  98         with open(filename, "r") as rf:
  99             lines = rf.read()
 100         self.parse_raw_macs_file(lines, location)
 101
 102     def parse_raw_macs_file(self, raw: str, location: Location) -> None:
 103         lines = raw.split("\n")
 104
 105         # CC:F4:11:D7:FA:EE, 2240, 10.0.0.22 (side_deck_high_home), Google, 1611681990
 106         cabin_count = 0
 107         for line in lines:
 108             line = line.strip()
 109             if len(line) == 0:
 110                 continue
 111             logger.debug(f'{location}> {line}')
 112             if "cabin_" in line:
 113                 continue
 114             if location == Location.CABIN:
 115                 logger.debug('Cabin count: {cabin_count}')
 116                 cabin_count += 1
 117             try:
 118                 (mac, count, ip_name, mfg, ts) = line.split(",")
 119             except Exception as e:
 120                 logger.error(f'SKIPPED BAD LINE> {line}')
 121                 logger.exception(e)
 122                 continue
 123             mac = mac.strip()
 124             (self.location_ts_by_mac[location])[
 125                 mac
 126             ] = datetime.datetime.fromtimestamp(int(ts.strip()))
 127             ip_name = ip_name.strip()
 128             match = re.match(r"(\d+\.\d+\.\d+\.\d+) +\(([^\)]+)\)", ip_name)
 129             if match is not None:
 130                 name = match.group(2)
 131                 self.names_by_mac[mac] = name
 132         if cabin_count > 0:
 133             logger.debug('Weird MAC at the cabin')
 134             self.weird_mac_at_cabin = True
 135
 136     def is_anyone_in_location_now(self, location: Location) -> bool:
 137         for person in Person:
 138             if person is not None:
 139                 loc = self.where_is_person_now(person)
 140                 if location == loc:
 141                     return True
 142         if location == location.CABIN and self.weird_mac_at_cabin:
 143             return True
 144         return False
 145
 146     def where_is_person_now(self, name: Person) -> Location:
 147         import dict_utils
 148
 149         if name is Person.UNKNOWN:
 150             if self.weird_mac_at_cabin:
 151                 return Location.CABIN
 152             else:
 153                 return Location.UNKNOWN
 154         votes: Dict[Location, int] = {}
 155         tiebreaks: Dict[Location, datetime.datetime] = {}
 156         credit = 10000
 157         for mac in self.devices_by_person[name]:
 158             logger.debug(f'Looking for {name}... check for mac {mac}')
 159             if mac not in self.names_by_mac:
 160                 continue
 161             for location in self.location_ts_by_mac:
 162                 if mac in self.location_ts_by_mac[location]:
 163                     ts = (self.location_ts_by_mac[location])[mac]
 164                     logger.debug(f'I saw {mac} at {location} at {ts}')
 165                     tiebreaks[location] = ts
 166             location = dict_utils.key_with_min_value(tiebreaks)
 167             v = votes.get(location, 0)
 168             votes[location] = v + credit
 169             logger.debug('{name}: {location} gets {credit} votes.')
 170             credit = int(
 171                 credit * 0.667
 172             )  # Note: list most important devices first
 173             if credit <= 0:
 174                 credit = 1
 175         if len(votes) > 0:
 176             item = dict_utils.item_with_max_value(votes)
 177             return item[0]
 178         return Location.UNKNOWN
 179
 180
 181 @bootstrap.initialize
 182 def main() -> None:
 183     p = PresenceDetection()
 184     for person in Person:
 185         print(f'{person} => {p.where_is_person_now(person)}')
 186     print()
 187     for location in Location:
 188         print(f'{location} => {p.is_anyone_in_location_now(location)}')
 189
 190
 191 if __name__ == '__main__':
 192     main()