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