camera_trigger.py

   1 #!/usr/bin/env python3
   2
   3 import logging
   4 import os
   5 import time
   6 from typing import List, Tuple, Optional
   7
   8 import trigger
   9
  10
  11 logger = logging.getLogger(__file__)
  12
  13
  14 class any_camera_trigger(trigger.trigger):
  15     def __init__(self):
  16         self.triggers_in_the_past_seven_min = {
  17             "driveway": 0,
  18             "frontdoor": 0,
  19             "doorbell": 0,
  20             "cabin_driveway": 0,
  21         }
  22         self.last_trigger_timestamp = {
  23             "driveway": 0,
  24             "frontdoor": 0,
  25             "doorbell": 0,
  26             "cabin_driveway": 0,
  27         }
  28
  29     def choose_priority(self, camera: str, age: int) -> int:
  30         """Based on the camera name and last trigger age, compute priority."""
  31         base_priority_by_camera = {
  32             "driveway": 3,
  33             "frontdoor": 2,
  34             "doorbell": 1,
  35             "cabin_driveway": 3,
  36         }
  37         priority = base_priority_by_camera[camera]
  38         if age < 10:
  39             priority += trigger.trigger.PRIORITY_HIGH
  40         elif age < 30:
  41             priority += trigger.trigger.PRIORITY_NORMAL + age
  42         else:
  43             priority += trigger.trigger.PRIORITY_LOW
  44         return priority
  45
  46     def get_triggered_page_list(self) -> Optional[List[Tuple[str, int]]]:
  47         """Return a list of triggered pages with priorities."""
  48         triggers = []
  49         num_cameras_with_recent_triggers = 0
  50         camera_list = ["driveway", "frontdoor", "doorbell", "cabin_driveway"]
  51
  52         now = time.time()
  53         try:
  54             # First pass, just see whether each camera is triggered
  55             # and, if so, count how many times in the past 7m it has
  56             # been triggered.
  57             for camera in camera_list:
  58                 filename = f"/timestamps/last_camera_motion_{camera}"
  59                 ts = os.stat(filename).st_ctime
  60                 age = now - ts
  61                 if ts != self.last_trigger_timestamp[camera] and age < 10:
  62                     logger.info(f'{camera} is triggered; {filename} touched {age}s ago (@{ts}')
  63                     self.last_trigger_timestamp[camera] = ts
  64                     num_cameras_with_recent_triggers += 1
  65
  66                     self.triggers_in_the_past_seven_min[camera] = 0
  67                     filename = f"/timestamps/camera_motion_history_{camera}"
  68                     with open(filename, "r") as f:
  69                         contents = f.readlines()
  70                     for x in contents:
  71                         x = x.strip()
  72                         age = now - int(x)
  73                         if age < (60 * 7):
  74                             self.triggers_in_the_past_seven_min[camera] += 1
  75
  76             # Second pass, see whether we want to trigger due to
  77             # camera activity we found.  All cameras timestamps were
  78             # just considered and should be up-to-date.  Some logic to
  79             # squelch spammy cameras unless more than one is triggered
  80             # at the same time.
  81             for camera in camera_list:
  82                 if (now - self.last_trigger_timestamp[camera]) < 10:
  83                     if (
  84                         self.triggers_in_the_past_seven_min[camera] <= 4
  85                         or num_cameras_with_recent_triggers > 1
  86                     ):
  87                         logger.info(f'{camera} has {self.triggers_in_the_past_seven_min[camera]} triggers in the past 7d.')
  88                         logger.info(f'{num_cameras_with_recent_triggers} cameras are triggered right now.')
  89
  90                         age = now - self.last_trigger_timestamp[camera]
  91                         priority = self.choose_priority(camera, int(age))
  92                         logger.info(f'*** CAMERA TRIGGER (hidden/{camera}.html @ {priority}) ***')
  93                         triggers.append(
  94                             (
  95                                 f"hidden/unwrapped_{camera}.html",
  96                                 priority,
  97                             )
  98                         )
  99                     else:
 100                         logger.info(f'{camera} is too spammy; {self.triggers_in_the_past_seven_min[camera]} events in the past 7m.  Ignoring it.')
 101         except Exception as e:
 102             logger.exception(e)
 103
 104         if len(triggers) == 0:
 105             return None
 106         else:
 107             logger.info('There are active camera triggers!')
 108             return triggers
 109
 110
 111 # x = any_camera_trigger()
 112 # print(x.get_triggered_page_list())