camera_trigger.py

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