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