641 lines
25 KiB
Python
641 lines
25 KiB
Python
"""ShieldConnectionManager — entry-scoped owner of the ADB connection (Phase 1).
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The ADB socket, its watchdog and all ADB-derived state live here instead of on
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the media-player entity (plan blockers B1/B2/B5):
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- one persistent socket; a watchdog task reconnects with exponential backoff
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(5 s doubling to a 300 s cap, ±25 % jitter) when it drops, and pulls the
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heartbeat data (wake + media sessions + running apps) while connected;
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- ADB-derived values live in a
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:class:`StateStore` with per-field timestamps and TTL expiry — stale values
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read as expired (None/empty) instead of clinging on;
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- entities are thin callback-views: they ``register_listener()`` and write HA
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state when the store changes (the androidtv core ``entity.py`` pattern);
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- ADB is optional: when no poller factory is provided the manager is *passive*
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and the entry still sets up — a failed ADB connect is a background retry,
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never a ``ConfigEntryNotReady``.
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This module deliberately stays Home-Assistant-free at import time so it is
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unit-testable with plain pytest; every hass capability is injected (the entry
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builds the concrete poller factory). Task creation additionally works without
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hass (plain ``asyncio.create_task``) for the unit tests.
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"""
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import asyncio
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import contextlib
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import logging
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import random
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import time
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from collections.abc import Callable
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from typing import Any
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from .adb_session import AdbMediaSessionPoller
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from .const import (
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ADB_POLL_INTERVAL,
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ADB_RECONNECT_BACKOFF_CAP,
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ADB_RECONNECT_BACKOFF_START,
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ADB_RECONNECT_JITTER,
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STATE_STORE_TTL,
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SYSTEM_MEDIA_PACKAGES,
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)
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from .ha_adb_common import MediaSessionInfo, parse_audio_playback
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_LOGGER = logging.getLogger(__name__)
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# StateStore field names
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FIELD_AWAKE = "awake"
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FIELD_SESSIONS = "sessions"
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FIELD_AUDIO_PLAYBACK = "audio_playback"
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FIELD_RUNNING_APPS = "running_apps"
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# Protocol transport (androidtvremote2) push fields
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FIELD_IS_ON = "is_on"
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FIELD_IS_AVAILABLE = "is_available"
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FIELD_CURRENT_APP = "current_app"
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FIELD_VOLUME_INFO = "volume_info"
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# ADB fallback foreground identity (P3-2): stamped only when the protocol
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# push is silent; consumers prefer FIELD_CURRENT_APP over this.
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FIELD_FOREGROUND = "foreground"
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# ADB-derived fields (cleared when the ADB connection goes down — they are
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# regenerated by the watchdog); protocol pushes (IS_ON/IS_AVAILABLE/
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# CURRENT_APP/VOLUME_INFO) are device-reported truth and expire by TTL only,
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# so an ADB outage never clobbers them.
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ADB_FIELDS = (
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FIELD_AWAKE,
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FIELD_SESSIONS,
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FIELD_AUDIO_PLAYBACK,
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FIELD_RUNNING_APPS,
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FIELD_FOREGROUND,
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)
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PROTOCOL_FIELDS = (
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FIELD_IS_ON,
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FIELD_IS_AVAILABLE,
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FIELD_CURRENT_APP,
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FIELD_VOLUME_INFO,
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)
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ALL_FIELDS = ADB_FIELDS + PROTOCOL_FIELDS
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def volume_tuple(info) -> tuple | None:
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"""Normalize the protocol's volume push to ``(level, max, muted)``.
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The library delivers a VolumeInfo TypedDict (``level``/``max``/``muted``).
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Readout only — there is no protocol-native VOLUME_SET (C-VOL), so nothing
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here ever sends one.
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"""
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if info is None:
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return None
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try:
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return (
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float(info.get("level", 0.0)),
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float(info.get("max", 1.0)),
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bool(info.get("muted", False)),
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)
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except (AttributeError, TypeError, ValueError):
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return None
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class StateStore:
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"""Timed per-field state cache shared by all entities of one entry.
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Reading an expired (or missing) field returns the caller-supplied
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default, so a stale "playing" session can never outlive the TTL (plan
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blocker B5). Values are written only via :meth:`set`, which re-stamps the
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field's freshness timestamp.
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"""
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def __init__(self, ttl: float = STATE_STORE_TTL, clock: Callable[[], float] = time.monotonic):
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self._ttl = ttl
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self._clock = clock
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self._values: dict[str, tuple[float, Any]] = {}
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def set(self, name: str, value: Any) -> None:
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"""Store a value, re-stamping its freshness timestamp."""
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self._values[name] = (self._clock(), value)
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def get(self, name: str, default: Any = None) -> Any:
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"""Return the field's value, or ``default`` when it is missing/expired."""
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stamped = self._values.get(name)
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if stamped is None:
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return default
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at, value = stamped
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if self._clock() - at > self._ttl:
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return default
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return value
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def clear(self, *names: str) -> None:
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"""Drop fields immediately so they read as expired on the next get."""
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for name in names:
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self._values.pop(name, None)
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@property
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def ttl(self) -> float:
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return self._ttl
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class ShieldConnectionManager:
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"""Owner of one entry's persistent connections (both transports) + state.
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Transport A — ADB (adb_shell): the watchdog keeps a persistent socket,
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pulls heartbeats and reconnects with its own backoff ladder.
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Transport B — remote protocol (androidtvremote2, Phase 2): the library
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owns reconnection (``keep_reconnecting`` with internal backoff), pushes
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``is_on``/``is_available``/``current_app``/``volume_info`` into the state
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store, and surfaces invalid certs (device hard reset) via a reauth hook.
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:param poller_factory: builds the ADB poller when the watchdog starts;
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skipped entirely for entries without ADB (passive manager) or tests
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that inject a ready-to-use ``poller`` directly.
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:param protocol_factory: builds the AndroidTVRemote client; instead pass
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``protocol_settings`` (host/client_name/certfile/keyfile) and the
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manager builds it, or ``protocol`` directly (tests).
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:param invalid_auth_callback: called when the device rejects our
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certificates (hard reset) — the entry-owned reauth hook (t9).
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"""
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def __init__(
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self,
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hass=None,
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entry=None,
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poller_factory: Callable[[], AdbMediaSessionPoller] | None = None,
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poller: AdbMediaSessionPoller | None = None,
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store: StateStore | None = None,
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protocol_factory: Callable[[], Any] | None = None,
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protocol: Any = None,
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protocol_settings: dict | None = None,
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invalid_auth_callback: Callable[[], None] | None = None,
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):
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self.hass = hass
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self.entry = entry
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self.store = store if store is not None else StateStore(ttl=STATE_STORE_TTL)
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self._poller_factory = poller_factory
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self._poller = poller
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# Remote-protocol transport (androidtvremote2): entry passes either a
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# settings dict (manager itself builds the real client) or a factory /
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# ready-made client (tests, or the config flow when it pre-pairs).
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self._protocol_factory = protocol_factory
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self._protocol = protocol
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self._protocol_settings = protocol_settings
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self._invalid_auth_callback = invalid_auth_callback
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self._protocol_loop: asyncio.AbstractEventLoop | None = None
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self._listeners: list[Callable[[], None]] = []
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self._tasks: list[asyncio.Task] = []
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self._stopping = False
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self._failures = 0
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self._down_since = False # listeners already told the connection is down
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# ── One-shot connection test (pairing UX) ──
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@staticmethod
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async def test_connect(host: str, port: int, key_path: str) -> bool:
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"""Single-shot ADB connect used by the config-flow pairing step.
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Throws away the poller immediately — the config flow runs before any
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entry exists, so it must never touch an entry's persistent socket.
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"""
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poller = AdbMediaSessionPoller(host, port, key_path)
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try:
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return await poller.connect()
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finally:
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await poller.disconnect()
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# ── Remote-protocol transport (androidtvremote2, Phase 2) ──
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@staticmethod
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def build_protocol_client(
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host: str,
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client_name: str,
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certfile: str,
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keyfile: str,
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api_port: int = 6466,
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pair_port: int = 6467,
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loop=None,
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):
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"""Build a real androidtvremote2 client (cert/PIN flow hook, t9).
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Kept as a manager-level factory so the config flow never hand-rolls
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the constructor; the import stays local so this module remains
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importable where androidtvremote2 is not installed.
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"""
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try:
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import androidtvremote2
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except ImportError:
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_LOGGER.warning(
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"androidtvremote2 is not installed — the remote-protocol "
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"transport is disabled and the entry degrades to ADB-only."
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)
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return None
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return androidtvremote2.AndroidTVRemote(
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client_name=client_name,
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certfile=certfile,
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keyfile=keyfile,
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host=host,
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api_port=api_port,
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pair_port=pair_port,
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loop=loop,
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)
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def _build_protocol(self):
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"""Default factory from the entry settings (host + cert/key paths)."""
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settings = self._protocol_settings or {}
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return self.build_protocol_client(
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host=settings["host"],
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client_name=settings.get("client_name", "Home Assistant"),
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certfile=settings["certfile"],
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keyfile=settings["keyfile"],
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)
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async def _start_protocol(self) -> None:
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"""Spin up the protocol transport alongside the ADB watchdog.
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One owner per transport: the library's own ``keep_reconnecting()``
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handles reconnection with its internal backoff, so no competing
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watchdog is built here. Push callbacks write straight into the
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StateStore and ping registered listeners.
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"""
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if self._protocol is None:
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if self._protocol_factory is None:
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if self._protocol_settings is None:
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return # protocol transport disabled for this entry
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self._protocol_factory = self._build_protocol
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self._protocol = self._protocol_factory()
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client = self._protocol
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if client is None:
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return
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# Real client: make sure local certificate material exists before it
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# connects (fails soft — pair flows can regenerate).
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generate_cert = getattr(client, "async_generate_cert_if_missing", None)
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if generate_cert is not None:
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with contextlib.suppress(Exception):
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await generate_cert()
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self._protocol_loop = asyncio.get_running_loop()
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client.add_is_on_updated_callback(self._on_is_on)
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client.add_is_available_updated_callback(self._on_is_available)
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client.add_current_app_updated_callback(self._on_current_app)
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client.add_volume_info_updated_callback(self._on_volume_info)
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# One owner per transport: the library's keep_reconnecting() creates
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# and owns its reconnect task internally — we never wrap or duplicate
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# it (the stop path closes the client, which tears the task down).
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client.keep_reconnecting(self._on_invalid_auth)
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def _on_is_on(self, on) -> None:
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self._protocol_push(FIELD_IS_ON, bool(on))
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def _on_is_available(self, is_available) -> None:
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self._protocol_push(FIELD_IS_AVAILABLE, bool(is_available))
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def _on_current_app(self, app_package) -> None:
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self._protocol_push(FIELD_CURRENT_APP, app_package)
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def _on_volume_info(self, info) -> None:
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self._protocol_push(FIELD_VOLUME_INFO, volume_tuple(info))
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def _on_invalid_auth(self) -> None:
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"""Device hard reset — certificates rejected.
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The library keeps its own backoff, but retrying can never succeed
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since certificated auth is gone — the entry-level callback (reauth
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flow) decides the user-facing response (t9).
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"""
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_LOGGER.warning(
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"Shield remote-protocol auth is invalid (device hard reset?) — "
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"notifying the entry's reauth hook"
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)
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if self._invalid_auth_callback is not None:
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try:
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self._invalid_auth_callback()
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except Exception:
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_LOGGER.exception("Shield invalid-auth callback failed")
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def _protocol_push(self, field: str, value) -> None:
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"""Stamp a push value into the store and ping listeners.
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Push callbacks may arrive off the event loop (grpc worker threads);
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route the listener notification back onto the captured loop.
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"""
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self.store.set(field, value)
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loop = self._protocol_loop
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if loop is not None and loop.is_running():
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try:
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loop.call_soon_threadsafe(self._notify)
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return
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except RuntimeError:
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pass # loop closed during shutdown — skip the notify
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self._notify()
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# ── Introspection (thin views for entities) ──
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@property
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def available(self) -> bool:
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"""True when ADB is active for this entry (a poller exists)."""
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return self._poller is not None
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@property
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def connected(self) -> bool:
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return bool(self._poller and self._poller.connected)
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@property
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def awake(self) -> bool | None:
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"""Device wake state (exact mWakefulness parse), None = unknown."""
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return self.store.get(FIELD_AWAKE)
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@property
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def active_sessions(self) -> list[MediaSessionInfo]:
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"""Stored media sessions, sorted playing > paused > other."""
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return self.store.get(FIELD_SESSIONS, [])
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@property
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def audio_playback(self) -> list[str]:
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"""Packages that recently played audio, ordered last-played-first."""
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return self.store.get(FIELD_AUDIO_PLAYBACK, [])
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@property
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def running_apps(self) -> list[dict]:
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"""Visible recent-task apps, ordered by recency."""
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return self.store.get(FIELD_RUNNING_APPS, [])
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@property
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def protocol_active(self) -> bool:
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"""True when the remote-protocol transport is wired for this entry.
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Entities use this instead of reaching into ``_protocol``: a passive
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manager means "no transport", not "broken transport".
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"""
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return self._protocol is not None
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@property
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def is_on(self) -> bool | None:
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"""Protocol power push (device reports on/off state)."""
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return self.store.get(FIELD_IS_ON)
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@property
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def is_available(self) -> bool | None:
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"""Protocol availability push (device reachable at the protocol)."""
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return self.store.get(FIELD_IS_AVAILABLE)
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@property
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def current_app(self) -> str | None:
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"""Protocol current-app push (raw package; name resolution deferred)."""
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return self.store.get(FIELD_CURRENT_APP)
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@property
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def foreground_app(self) -> str | None:
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"""Best foreground identity: protocol push first, ADB parse fallback
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(P3-2 store priority: FIELD_CURRENT_APP > FIELD_FOREGROUND)."""
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return self.store.get(FIELD_CURRENT_APP) or self.store.get(FIELD_FOREGROUND)
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@property
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def volume_info(self) -> tuple | None:
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"""Protocol volume push as ``(level, max, muted)`` — readout only
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(no protocol VOLUME_SET exists, C-VOL)."""
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return self.store.get(FIELD_VOLUME_INFO)
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def best_session(
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self, foreground_package: str | None = None
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) -> MediaSessionInfo | None:
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"""Best media session: foreground app first, then playing > paused."""
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sessions = self.active_sessions
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if not sessions:
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return None
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if foreground_package:
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for session in sessions:
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if session.package == foreground_package:
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return session
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return sessions[0]
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# ── Listener API (entities are thin callback-views) ──
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def register_listener(self, listener: Callable[[], None]) -> Callable[[], None]:
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"""Register a refresh callback; returns an unsubscribe callable."""
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self._listeners.append(listener)
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def _unregister() -> None:
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with contextlib.suppress(ValueError):
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self._listeners.remove(listener)
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return _unregister
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def _notify(self) -> None:
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for listener in tuple(self._listeners):
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try:
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listener()
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except Exception:
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_LOGGER.exception("Shield state listener failed")
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# ── Delegation (commands over the managed socket) ──
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async def send_media_command(self, command: str) -> bool:
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"""Send a media key command over the persistent socket."""
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if not self.available:
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return False
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return await self._poller.send_media_command(command)
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async def bring_to_foreground(self, package: str) -> bool:
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if not self.available:
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return False
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return await self._poller.bring_to_foreground(package)
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# -- Protocol command delegation (Phase 2) --
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async def send_protocol_key(self, key: str, direction: str = "SHORT") -> bool:
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"""Send a remote-protocol key push (fast, non-blocking).
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Returns False when the transport is down or the send raises — entities
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then fall back to the ADB keyevent path.
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"""
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if self._protocol is None:
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return False
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try:
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self._protocol.send_key_command(key, direction)
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return True
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except Exception as err:
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_LOGGER.debug("Protocol key %s failed: %s", key, err)
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return False
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async def launch_app(self, app_link_or_app_id: str) -> bool:
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"""Launch an app or URL over the protocol transport.
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``send_launch_app_command`` auto-prefixes ``market://launch?id=`` for
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bare package ids (C-LAUNCH); deep links pass through unchanged.
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"""
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if self._protocol is None:
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return False
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try:
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self._protocol.send_launch_app_command(app_link_or_app_id)
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return True
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except Exception as err:
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_LOGGER.debug("Protocol launch %s failed: %s", app_link_or_app_id, err)
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return False
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async def send_digit_key(self, digit: str) -> bool:
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"""Channel digit via the ADB keyevent path (fallback for §7)."""
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if not self.available:
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return False
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return await self._poller.send_digit_keyevent(digit)
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async def send_enter_key(self) -> bool:
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"""ENTER via the ADB keyevent path (KEYCODE_ENTER = 66, §7 fallback)."""
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if not self.available:
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return False
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return await self._poller.send_enter_keyevent()
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# ── Lifecycle ──
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async def async_start(self) -> None:
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"""Start the persistent connection loop.
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Never validates the ADB connection here: setup must not fail because
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of ADB (it is optional), so all failure handling lives in the
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watchdog's background retry.
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"""
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self._stopping = False
|
|
self._tasks.append(self._create_task(self._watchdog(), "shield_adb_watchdog"))
|
|
await self._start_protocol()
|
|
|
|
async def async_stop(self) -> None:
|
|
"""Cancel all manager tasks and close the socket.
|
|
|
|
Called on entry unload and on EVENT_HOMEASSISTANT_STOP.
|
|
"""
|
|
self._stopping = True
|
|
tasks, self._tasks = self._tasks, []
|
|
for task in tasks:
|
|
task.cancel()
|
|
self._listeners.clear()
|
|
if self._poller is not None:
|
|
with contextlib.suppress(Exception):
|
|
await self._poller.disconnect()
|
|
self._poller = None
|
|
if self._protocol is not None:
|
|
with contextlib.suppress(Exception):
|
|
self._protocol.disconnect()
|
|
self._protocol = None
|
|
|
|
def _create_task(self, coro, name: str) -> asyncio.Task:
|
|
if self.hass is not None:
|
|
return self.hass.async_create_background_task(coro, name)
|
|
return asyncio.create_task(coro, name=name)
|
|
|
|
async def _watchdog(self) -> None:
|
|
"""Persistent loop: reconnect with backoff when down, refresh when up.
|
|
|
|
A passive manager (no poller possible) exits immediately — the entry
|
|
recreates it when options change (full reload).
|
|
"""
|
|
try:
|
|
if self._poller is None:
|
|
if self._poller_factory is None:
|
|
return
|
|
self._poller = self._poller_factory()
|
|
if self._poller is None:
|
|
return
|
|
|
|
backoff = ADB_RECONNECT_BACKOFF_START
|
|
while not self._stopping:
|
|
delay = await self._watchdog_cycle(backoff)
|
|
if self._stopping:
|
|
break
|
|
if self.connected:
|
|
backoff = ADB_RECONNECT_BACKOFF_START
|
|
else:
|
|
backoff = min(backoff * 2, ADB_RECONNECT_BACKOFF_CAP)
|
|
await asyncio.sleep(delay)
|
|
except asyncio.CancelledError:
|
|
raise
|
|
except Exception:
|
|
_LOGGER.exception("Shield connection watchdog crashed")
|
|
|
|
async def _watchdog_cycle(self, backoff: float) -> float:
|
|
"""Run one watchdog cycle; return seconds to sleep before the next.
|
|
|
|
When the connection is up this is the heartbeat: wake check + (when
|
|
awake) media sessions + running apps, all stored with timestamps.
|
|
The current backoff sleeps after failures; success resets it."""
|
|
|
|
try:
|
|
if not self.connected and not await self._poller.connect():
|
|
await self._note_failure(backoff)
|
|
return self._jitter(backoff)
|
|
if self._failures:
|
|
self._failures = 0
|
|
self._down_since = False
|
|
_LOGGER.info("ADB connection recovered")
|
|
await self._refresh()
|
|
return ADB_POLL_INTERVAL
|
|
except Exception as err:
|
|
await self._note_failure(backoff)
|
|
_LOGGER.debug("Watchdog cycle failed: %s", err)
|
|
return self._jitter(backoff)
|
|
|
|
async def _note_failure(self, backoff: float) -> None:
|
|
"""Bookkeep a failed cycle: log sparingly, drop stale store, notify."""
|
|
self._failures += 1
|
|
if self._failures == 1 or self._failures % 6 == 0:
|
|
_LOGGER.warning(
|
|
"ADB connection down (%s consecutive failures) — retrying in ~%.0fs",
|
|
self._failures,
|
|
backoff,
|
|
)
|
|
if not self._down_since:
|
|
self._down_since = True
|
|
# Reconnect decision (health_check's documented role): close the
|
|
# socket so the next cycle rebuilds it from scratch instead of
|
|
# trusting shell()'s auto-reconnect on a broken transport.
|
|
try:
|
|
await self._poller.disconnect()
|
|
except Exception:
|
|
_LOGGER.debug("disconnect during reconnect decision failed", exc_info=True)
|
|
# Only ADB-derived fields expire here: protocol pushes are
|
|
# device-reported truth and must survive an ADB outage (t11 F2).
|
|
self.store.clear(*ADB_FIELDS)
|
|
self._notify()
|
|
|
|
@staticmethod
|
|
def _jitter(delay: float) -> float:
|
|
"""Backoff with ±jitter so many clients do not reconnect in lockstep."""
|
|
return max(
|
|
1.0,
|
|
delay * (1.0 + random.uniform(-ADB_RECONNECT_JITTER, ADB_RECONNECT_JITTER)),
|
|
)
|
|
|
|
async def _refresh(self) -> None:
|
|
"""Heartbeat: pull all ADB-derived state into the store (with stamps)."""
|
|
poller = self._poller
|
|
awake = await poller.is_awake()
|
|
if awake is None:
|
|
# Failed poll (connection dropped / device unreachable) — surface
|
|
# as a cycle failure instead of clinging to the last values.
|
|
raise ConnectionError("ADB wake poll failed")
|
|
self.store.set(FIELD_AWAKE, awake)
|
|
if awake:
|
|
# Full dump, no truncation (B4) — low sessions must not be lost.
|
|
await poller.poll_media_sessions(head_lines=None)
|
|
self.store.set(FIELD_SESSIONS, list(poller.all_sessions))
|
|
# Zero-cost hint from the same dump; system processes filtered
|
|
# (mediashell/systemui/tv settings/diagtools report "audio").
|
|
playback = [
|
|
pkg
|
|
for pkg in parse_audio_playback(poller.last_dump or "")
|
|
if pkg not in SYSTEM_MEDIA_PACKAGES
|
|
]
|
|
self.store.set(FIELD_AUDIO_PLAYBACK, playback)
|
|
self.store.set(FIELD_RUNNING_APPS, await poller.poll_running_apps())
|
|
# Foreground fallback (P3-2): ADB parse only when the protocol
|
|
# push is silent — store priority is protocol > ADB, so this
|
|
# never overwrites a live push.
|
|
if self.store.get(FIELD_CURRENT_APP) is None:
|
|
foreground = await poller.poll_foreground()
|
|
if foreground:
|
|
self.store.set(FIELD_FOREGROUND, foreground)
|
|
self._cache_last_known(foreground)
|
|
else:
|
|
# Standby: playback data is not current — expire it.
|
|
self.store.set(FIELD_SESSIONS, [])
|
|
self.store.set(FIELD_AUDIO_PLAYBACK, [])
|
|
self.store.set(FIELD_RUNNING_APPS, [])
|
|
self._notify()
|