mirror of
https://github.com/blakeblackshear/frigate.git
synced 2026-10-19 13:12:48 +03:00
Josh Hawkins
c1543f587c
Running the full registration validator over stored rows dropped self-hosted endpoints registered before 0.18 with a non-443 port or a bare / path. _build_web_pushers now skips only non-dict rows, rows with no endpoint, unparsable endpoints and hosts with empty labels, and the warning names the host so the row can be found. Registration still uses the full validator.
742 lines
27 KiB
Python
742 lines
27 KiB
Python
"""Handle sending notifications for Frigate via Firebase."""
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import datetime
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import ipaddress
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import json
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import logging
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import os
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import queue
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import threading
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from collections.abc import Callable, Iterator
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from dataclasses import dataclass
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from multiprocessing.synchronize import Event as MpEvent
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from typing import Any
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from urllib.parse import urlparse
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import requests
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from py_vapid import Vapid01
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from pywebpush import WebPusher
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from titlecase import titlecase
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from frigate.comms.base_communicator import Communicator
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from frigate.comms.config_updater import ConfigSubscriber
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from frigate.config import FrigateConfig
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from frigate.config.auth import AuthConfig
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from frigate.config.camera.updater import (
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CameraConfigUpdateEnum,
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CameraConfigUpdateSubscriber,
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)
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from frigate.const import BASE_DIR, CONFIG_DIR
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from frigate.models import User
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logger = logging.getLogger(__name__)
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@dataclass
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class PushNotification:
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user: str
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payload: dict[str, Any]
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title: str
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message: str
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direct_url: str = ""
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image: str = ""
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notification_type: str = "alert"
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ttl: int = 0
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# Push endpoints are opaque URLs but stay well under this in practice
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MAX_ENDPOINT_LENGTH = 2048
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# Suffixes that only ever resolve on the local network
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INTERNAL_HOST_SUFFIXES = (".local", ".localdomain", ".internal", ".home.arpa")
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def validate_push_endpoint(endpoint: Any) -> str | None:
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"""Return a reason the endpoint is unusable, or None when it is valid.
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Subscriptions are issued by the browser vendor's push service, so a valid
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endpoint is always a public https URL. Anything else is either a broken
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registration or an attempt to aim the notification sender somewhere it
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should not reach.
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"""
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if not isinstance(endpoint, str) or not endpoint:
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return "endpoint must be a url"
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if len(endpoint) > MAX_ENDPOINT_LENGTH:
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return "endpoint is too long"
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try:
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parsed = urlparse(endpoint)
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port = parsed.port
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except ValueError:
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return "endpoint is not a valid url"
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if parsed.scheme != "https":
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return "endpoint must use https"
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if parsed.username or parsed.password:
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return "endpoint must not include credentials"
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if port is not None and port != 443:
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return "endpoint must use the default https port"
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hostname = parsed.hostname
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if not hostname:
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return "endpoint must include a hostname"
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try:
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address = ipaddress.ip_address(hostname)
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except ValueError:
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address = None
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if address is not None:
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# A push service is never reachable at an address only this network can
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# route, so anything non-global is a misconfiguration at best
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if not address.is_global:
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return "endpoint must not use a private address"
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elif hostname == "localhost" or "." not in hostname:
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return "endpoint must use a fully qualified hostname"
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elif "" in hostname.split("."):
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return "endpoint hostname must not contain empty labels"
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elif hostname.endswith(INTERNAL_HOST_SUFFIXES):
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return "endpoint must not use an internal hostname"
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# The subscription token lives in the path
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if len(parsed.path) <= 1:
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return "endpoint must include a subscription path"
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return None
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class _NoRedirectSession(requests.Session):
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"""Session that never follows redirects.
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A push endpoint could otherwise redirect the send to an internal URL.
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"""
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def request(self, *args: Any, **kwargs: Any) -> requests.Response:
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kwargs["allow_redirects"] = False
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return super().request(*args, **kwargs)
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_push_session = _NoRedirectSession()
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def _vapid_audience(endpoint: str) -> str:
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parsed = urlparse(endpoint)
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return f"{parsed.scheme}://{parsed.netloc}"
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def _build_web_pushers(user: str, subs: list[dict[str, Any]]) -> list[WebPusher]:
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"""Build pushers for a user's stored subscriptions, skipping unusable ones."""
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pushers: list[WebPusher] = []
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for sub in subs:
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# Stored rows may predate registration validation, so only skip the
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# endpoints that would break building the VAPID audience
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endpoint = sub.get("endpoint") if isinstance(sub, dict) else None
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if not isinstance(endpoint, str):
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logger.warning(
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"Skipping notification subscription for %s: no endpoint", user
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)
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continue
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try:
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hostname = urlparse(endpoint).hostname or ""
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except ValueError:
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logger.warning(
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"Skipping notification subscription for %s: unparsable endpoint", user
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)
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continue
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if "" in hostname.split("."):
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logger.warning(
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"Skipping notification subscription for %s: invalid endpoint host %r",
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user,
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hostname,
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)
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continue
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# WebPusher decodes the stored keys and raises on malformed ones
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try:
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pushers.append(WebPusher(sub, requests_session=_push_session))
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except Exception:
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logger.warning("Skipping invalid notification subscription for %s", user)
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return pushers
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class WebPushClient(Communicator):
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"""Frigate wrapper for webpush client."""
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def __init__(self, config: FrigateConfig, stop_event: MpEvent) -> None:
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self.config = config
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self.stop_event = stop_event
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self.claim_headers: dict[str, dict[str, str]] = {}
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self.refresh: int = 0
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self.web_pushers: dict[str, list[WebPusher]] = {}
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self.expired_subs: dict[str, list[str]] = {}
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self.suspended_cameras: dict[str, int] = {
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c.name: 0 # type: ignore[misc]
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for c in self.config.cameras.values()
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}
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self.suspension_broadcaster: Callable[[str, Any, bool], None] | None = None
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self.config_lock = threading.Lock()
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self.last_camera_notification_time: dict[str, float] = {
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c.name: 0 # type: ignore[misc]
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for c in self.config.cameras.values()
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}
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self.last_notification_time: float = 0
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self.user_cameras: dict[str, set[str]] = {}
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self.notification_queue: queue.Queue[PushNotification] = queue.Queue()
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self.notification_thread: threading.Thread | None = None
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self.suspension_thread: threading.Thread | None = None
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if not self.config.notifications.email:
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logger.warning("Email must be provided for push notifications to be sent.")
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# Pull keys from PEM or generate if they do not exist
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self.vapid = Vapid01.from_file(os.path.join(CONFIG_DIR, "notifications.pem"))
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users: Iterator[dict[str, Any]] = (
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User.select(User.username, User.notification_tokens).dicts().iterator()
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)
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for user in users:
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self.web_pushers[user["username"]] = _build_web_pushers(
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user["username"], user["notification_tokens"]
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)
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# notification and auth config updater
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self.global_config_subscriber = ConfigSubscriber("config/")
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self.config_subscriber = CameraConfigUpdateSubscriber(
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self.config,
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self.config.cameras,
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[CameraConfigUpdateEnum.add, CameraConfigUpdateEnum.notifications],
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)
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self._refresh_user_cameras()
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def subscribe(self, receiver: Callable) -> None:
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"""Wrapper for allowing dispatcher to subscribe."""
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pass
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def start(self) -> None:
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self.notification_thread = threading.Thread(
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target=self._process_notifications, daemon=True
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)
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self.notification_thread.start()
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self.suspension_thread = threading.Thread(
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target=self._process_suspensions, daemon=True
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)
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self.suspension_thread.start()
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def check_registrations(self) -> None:
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# check for valid claim or create new one
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now = datetime.datetime.now().timestamp()
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if len(self.claim_headers) == 0 or self.refresh < now:
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self.refresh = int(
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(datetime.datetime.now() + datetime.timedelta(hours=1)).timestamp()
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)
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endpoints: set[str] = set()
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# get a unique set of push endpoints
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for pushers in self.web_pushers.values():
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for push in pushers:
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endpoint: str = push.subscription_info["endpoint"]
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endpoints.add(_vapid_audience(endpoint))
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# create new claim
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for endpoint in endpoints:
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claim = {
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"sub": f"mailto:{self.config.notifications.email}",
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"aud": endpoint,
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"exp": self.refresh,
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}
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self.claim_headers[endpoint] = self.vapid.sign(claim)
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def cleanup_registrations(self) -> None:
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# delete any expired subs
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if len(self.expired_subs) > 0:
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for user, expired in self.expired_subs.items():
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user_subs = []
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# get all subscriptions, removing ones that are expired
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stored_user: User = User.get_by_id(user)
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for token in stored_user.notification_tokens:
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if token["endpoint"] in expired:
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continue
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user_subs.append(token)
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# overwrite the database and reset web pushers
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User.update(notification_tokens=user_subs).where(
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User.username == user
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).execute()
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self.web_pushers[user] = _build_web_pushers(user, user_subs)
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logger.info(
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f"Cleaned up {len(expired)} notification subscriptions for {user}"
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)
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self.expired_subs = {}
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def suspend_notifications(self, camera: str, minutes: int) -> None:
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"""Suspend notifications for a specific camera."""
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suspend_until = int(
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(datetime.datetime.now() + datetime.timedelta(minutes=minutes)).timestamp()
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)
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self.suspended_cameras[camera] = suspend_until
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logger.info(
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f"Notifications for {camera} suspended until {datetime.datetime.fromtimestamp(suspend_until).strftime('%Y-%m-%d %H:%M:%S')}"
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)
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def unsuspend_notifications(self, camera: str) -> None:
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"""Unsuspend notifications for a specific camera."""
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self.suspended_cameras[camera] = 0
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logger.info(f"Notifications for {camera} unsuspended")
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def is_camera_suspended(self, camera: str) -> bool:
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return datetime.datetime.now().timestamp() <= self.suspended_cameras[camera]
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def set_suspension_broadcaster(
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self, broadcaster: Callable[[str, Any, bool], None]
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) -> None:
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"""Register the callback used to broadcast suspension state changes."""
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self.suspension_broadcaster = broadcaster
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def _process_suspensions(self) -> None:
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while not self.stop_event.wait(1):
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self._clear_expired_suspensions()
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def _clear_expired_suspensions(self) -> None:
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"""Reset and broadcast cameras whose suspension window has elapsed."""
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now = datetime.datetime.now().timestamp()
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for camera, suspended_until in list(self.suspended_cameras.items()):
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if suspended_until and now > suspended_until:
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self.unsuspend_notifications(camera)
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if self.suspension_broadcaster is not None:
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self.suspension_broadcaster(
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f"{camera}/notifications/suspended", "0", True
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)
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def publish(self, topic: str, payload: Any, retain: bool = False) -> None:
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"""Wrapper for publishing when client is in valid state."""
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with self.config_lock:
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# check for updated global config (notifications, auth)
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while True:
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config_topic, config_payload = (
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self.global_config_subscriber.check_for_update()
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)
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if config_topic is None:
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break
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if config_topic == "config/notifications" and config_payload:
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self.config.notifications = config_payload
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elif config_topic == "config/auth":
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if isinstance(config_payload, AuthConfig):
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self.config.auth = config_payload
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self._refresh_user_cameras()
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updates = self.config_subscriber.check_for_updates()
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if "add" in updates:
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for camera in updates["add"]:
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self.suspended_cameras[camera] = 0
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self.last_camera_notification_time[camera] = 0
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self._refresh_user_cameras()
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if topic == "reviews":
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decoded = json.loads(payload)
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camera = decoded["before"]["camera"]
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camera_config = self.config.cameras.get(camera)
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if camera_config is None or not camera_config.notifications.enabled:
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return
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if self.is_camera_suspended(camera):
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logger.debug(f"Notifications for {camera} are currently suspended.")
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return
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self.send_alert(decoded)
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if topic == "triggers":
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decoded = json.loads(payload)
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camera = decoded["camera"]
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name = decoded["name"]
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# ensure notifications are enabled and the specific trigger has
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# notification action enabled
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camera_config = self.config.cameras.get(camera)
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if (
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camera_config is None
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or not camera_config.notifications.enabled
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or name not in camera_config.semantic_search.triggers
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or "notification"
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not in camera_config.semantic_search.triggers[name].actions
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):
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return
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if self.is_camera_suspended(camera):
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logger.debug(f"Notifications for {camera} are currently suspended.")
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return
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self.send_trigger(decoded)
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elif topic == "camera_monitoring":
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decoded = json.loads(payload)
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camera = decoded["camera"]
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camera_config = self.config.cameras.get(camera)
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if camera_config is None or not camera_config.notifications.enabled:
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return
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if self.is_camera_suspended(camera):
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logger.debug(f"Notifications for {camera} are currently suspended.")
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return
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self.send_camera_monitoring(decoded)
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elif topic == "notification_test":
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if not self.config.notifications.enabled and not any(
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cam.notifications.enabled for cam in self.config.cameras.values()
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):
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logger.debug(
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"No cameras have notifications enabled, test notification not sent"
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)
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return
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self.send_notification_test()
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def send_push_notification(
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self,
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user: str,
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payload: dict[str, Any],
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title: str,
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message: str,
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direct_url: str = "",
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image: str = "",
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notification_type: str = "alert",
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ttl: int = 0,
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) -> None:
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notification = PushNotification(
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user=user,
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payload=payload,
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title=title,
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message=message,
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direct_url=direct_url,
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image=image,
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notification_type=notification_type,
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ttl=ttl,
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)
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self.notification_queue.put(notification)
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def _process_notifications(self) -> None:
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while not self.stop_event.is_set():
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try:
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notification = self.notification_queue.get(timeout=1.0)
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self.check_registrations()
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for pusher in self.web_pushers[notification.user]:
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endpoint = pusher.subscription_info["endpoint"]
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headers = self.claim_headers[_vapid_audience(endpoint)].copy()
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headers["urgency"] = "high"
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resp = pusher.send(
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headers=headers,
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ttl=notification.ttl,
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data=json.dumps(
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{
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"title": notification.title,
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"message": notification.message,
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"direct_url": notification.direct_url,
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"image": notification.image,
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"id": notification.payload.get("after", {}).get(
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"id", ""
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),
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"type": notification.notification_type,
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}
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),
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timeout=10,
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)
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if resp.status_code in (404, 410):
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self.expired_subs.setdefault(notification.user, []).append(
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endpoint
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)
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logger.debug(
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f"Notification endpoint expired for {notification.user}, received {resp.status_code}"
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)
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elif resp.status_code != 201:
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logger.warning(
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f"Failed to send notification to {notification.user} :: {resp.status_code}"
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)
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except queue.Empty:
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continue
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except Exception as e:
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logger.error(f"Error processing notification: {str(e)}")
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def _refresh_user_cameras(self) -> None:
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"""Rebuild the user-to-cameras access cache from the database."""
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all_camera_names = set(self.config.cameras.keys())
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roles_dict = self.config.auth.roles
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updated: dict[str, set[str]] = {}
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for user in User.select(User.username, User.role).dicts().iterator():
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allowed = User.get_allowed_cameras(
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user["role"], roles_dict, all_camera_names
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)
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updated[user["username"]] = set(allowed)
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logger.debug(
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"User %s has access to cameras: %s",
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user["username"],
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", ".join(allowed),
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)
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self.user_cameras = updated
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def _user_has_camera_access(self, username: str, camera: str) -> bool:
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"""Check if a user has access to a specific camera based on cached roles."""
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allowed = self.user_cameras.get(username)
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if allowed is None:
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logger.debug(f"No camera access information found for user {username}")
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return False
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return camera in allowed
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def _within_cooldown(self, camera: str) -> bool:
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now = datetime.datetime.now().timestamp()
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if now - self.last_notification_time < self.config.notifications.cooldown:
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logger.debug(
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f"Skipping notification for {camera} - in global cooldown period"
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)
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return True
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if (
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now - self.last_camera_notification_time[camera]
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< self.config.cameras[camera].notifications.cooldown
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):
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logger.debug(
|
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f"Skipping notification for {camera} - in camera-specific cooldown period"
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)
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return True
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return False
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def send_notification_test(self) -> None:
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if not self.config.notifications.email:
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return
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self.check_registrations()
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|
|
|
logger.debug("Sending test notification")
|
|
|
|
for user in self.web_pushers:
|
|
self.send_push_notification(
|
|
user=user,
|
|
payload={},
|
|
title="Test Notification",
|
|
message="This is a test notification from Frigate.",
|
|
direct_url="/",
|
|
notification_type="test",
|
|
)
|
|
|
|
def send_alert(self, payload: dict[str, Any]) -> None:
|
|
if (
|
|
not self.config.notifications.email
|
|
or payload["after"]["severity"] != "alert"
|
|
):
|
|
return
|
|
|
|
camera: str = payload["after"]["camera"]
|
|
camera_name: str = getattr(
|
|
self.config.cameras[camera], "friendly_name", None
|
|
) or titlecase(camera.replace("_", " "))
|
|
current_time = datetime.datetime.now().timestamp()
|
|
|
|
if self._within_cooldown(camera):
|
|
return
|
|
|
|
self.check_registrations()
|
|
|
|
state = payload["type"]
|
|
|
|
# Don't notify if message is an update and important fields don't have an update
|
|
if (
|
|
state == "update"
|
|
and payload["before"]["severity"] == payload["after"]["severity"]
|
|
and len(payload["before"]["data"]["objects"])
|
|
== len(payload["after"]["data"]["objects"])
|
|
and len(payload["before"]["data"]["zones"])
|
|
== len(payload["after"]["data"]["zones"])
|
|
):
|
|
logger.debug(
|
|
f"Skipping notification for {camera} - message is an update and important fields don't have an update"
|
|
)
|
|
return
|
|
|
|
self.last_camera_notification_time[camera] = current_time
|
|
self.last_notification_time = current_time
|
|
|
|
reviewId = payload["after"]["id"]
|
|
sorted_objects: set[str] = set()
|
|
|
|
for obj in payload["after"]["data"]["objects"]:
|
|
if "-verified" not in obj:
|
|
sorted_objects.add(obj)
|
|
|
|
sorted_objects.update(payload["after"]["data"]["sub_labels"])
|
|
|
|
image = f"{payload['after']['thumb_path'].replace(BASE_DIR, '')}"
|
|
ended = state == "end" or state == "genai"
|
|
|
|
if state == "genai" and payload["after"]["data"]["metadata"]:
|
|
base_title = payload["after"]["data"]["metadata"]["title"]
|
|
threat_level = payload["after"]["data"]["metadata"].get(
|
|
"potential_threat_level", 0
|
|
)
|
|
|
|
# Add prefix for threat levels 1 and 2
|
|
if threat_level == 1:
|
|
title = f"Needs Review: {base_title}"
|
|
elif threat_level == 2:
|
|
title = f"Security Concern: {base_title}"
|
|
else:
|
|
title = base_title
|
|
|
|
if payload["after"]["data"]["metadata"].get("shortSummary"):
|
|
message = payload["after"]["data"]["metadata"]["shortSummary"]
|
|
else:
|
|
message = f"Detected on {camera_name}"
|
|
else:
|
|
zone_names = payload["after"]["data"]["zones"]
|
|
formatted_zone_names = []
|
|
|
|
for zone_name in zone_names:
|
|
if zone_name in self.config.cameras[camera].zones:
|
|
formatted_zone_names.append(
|
|
self.config.cameras[camera]
|
|
.zones[zone_name]
|
|
.get_formatted_name(zone_name)
|
|
)
|
|
else:
|
|
formatted_zone_names.append(titlecase(zone_name.replace("_", " ")))
|
|
|
|
title = f"{titlecase(', '.join(sorted_objects).replace('_', ' '))}{' was' if state == 'end' else ''} detected in {', '.join(formatted_zone_names)}"
|
|
message = f"Detected on {camera_name}"
|
|
|
|
if ended:
|
|
logger.debug(
|
|
f"Sending a notification with state {state} and message {message}"
|
|
)
|
|
|
|
# if event is ongoing open to live view otherwise open to recordings view
|
|
direct_url = f"/review?id={reviewId}" if ended else f"/#{camera}"
|
|
ttl = 3600 if ended else 0
|
|
|
|
logger.debug(f"Sending push notification for {camera}, review ID {reviewId}")
|
|
|
|
for user in self.web_pushers:
|
|
if not self._user_has_camera_access(user, camera):
|
|
logger.debug(
|
|
"Skipping notification for user %s - no access to camera %s",
|
|
user,
|
|
camera,
|
|
)
|
|
continue
|
|
|
|
self.send_push_notification(
|
|
user=user,
|
|
payload=payload,
|
|
title=title,
|
|
message=message,
|
|
direct_url=direct_url,
|
|
image=image,
|
|
ttl=ttl,
|
|
)
|
|
|
|
self.cleanup_registrations()
|
|
|
|
def send_trigger(self, payload: dict[str, Any]) -> None:
|
|
if not self.config.notifications.email:
|
|
return
|
|
|
|
camera: str = payload["camera"]
|
|
camera_name: str = getattr(
|
|
self.config.cameras[camera], "friendly_name", None
|
|
) or titlecase(camera.replace("_", " "))
|
|
current_time = datetime.datetime.now().timestamp()
|
|
|
|
if self._within_cooldown(camera):
|
|
return
|
|
|
|
self.check_registrations()
|
|
|
|
self.last_camera_notification_time[camera] = current_time
|
|
self.last_notification_time = current_time
|
|
|
|
trigger_type = payload["type"]
|
|
event_id = payload["event_id"]
|
|
name = payload["name"]
|
|
score = payload["score"]
|
|
|
|
title = f"{name.replace('_', ' ')} triggered on {camera_name}"
|
|
message = f"{titlecase(trigger_type)} trigger fired for {camera_name} with score {score:.2f}"
|
|
image = f"clips/triggers/{camera}/{event_id}.webp"
|
|
|
|
direct_url = f"/explore?event_id={event_id}"
|
|
ttl = 0
|
|
|
|
logger.debug(
|
|
f"Sending push notification for {camera_name}, trigger name {name}"
|
|
)
|
|
|
|
for user in self.web_pushers:
|
|
if not self._user_has_camera_access(user, camera):
|
|
logger.debug(
|
|
"Skipping notification for user %s - no access to camera %s",
|
|
user,
|
|
camera,
|
|
)
|
|
continue
|
|
|
|
self.send_push_notification(
|
|
user=user,
|
|
payload=payload,
|
|
title=title,
|
|
message=message,
|
|
direct_url=direct_url,
|
|
image=image,
|
|
ttl=ttl,
|
|
)
|
|
|
|
self.cleanup_registrations()
|
|
|
|
def send_camera_monitoring(self, payload: dict[str, Any]) -> None:
|
|
camera: str = payload["camera"]
|
|
camera_name: str = getattr(
|
|
self.config.cameras[camera], "friendly_name", None
|
|
) or titlecase(camera.replace("_", " "))
|
|
|
|
self.check_registrations()
|
|
|
|
text: str = payload.get("message") or payload.get("reasoning", "")
|
|
title = f"{camera_name}: Monitoring Alert"
|
|
message = (text[:197] + "...") if len(text) > 200 else text
|
|
|
|
logger.debug(f"Sending camera monitoring push notification for {camera_name}")
|
|
|
|
for user in self.web_pushers:
|
|
if not self._user_has_camera_access(user, camera):
|
|
logger.debug(
|
|
"Skipping notification for user %s - no access to camera %s",
|
|
user,
|
|
camera,
|
|
)
|
|
continue
|
|
|
|
self.send_push_notification(
|
|
user=user,
|
|
payload=payload,
|
|
title=title,
|
|
message=message,
|
|
)
|
|
|
|
self.cleanup_registrations()
|
|
|
|
def stop(self) -> None:
|
|
logger.info("Closing notification queue")
|
|
if self.notification_thread is not None:
|
|
self.notification_thread.join()
|