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- Addressed comments in #174

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- Replaced active_scan flag with a list of track_devices
This commit is contained in:
Fabio Manganiello 2021-03-09 19:02:50 +01:00
parent b3606a8ac3
commit 093bac3a60
1 changed files with 12 additions and 20 deletions
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32
platypush/backend/bluetooth/scanner/__init__.py
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@ -1,6 +1,6 @@
import time import time
from threading import Thread, RLock from threading import Thread, RLock
from typing import Dict, Optional from typing import Dict, Optional, List
from platypush.backend.sensor import SensorBackend from platypush.backend.sensor import SensorBackend
from platypush.context import get_plugin from platypush.context import get_plugin
@ -23,13 +23,12 @@ class BluetoothScannerBackend(SensorBackend):
""" """
def __init__(self, device_id: Optional[int] = None, scan_duration: int = 10, active_scan: bool = False, **kwargs): def __init__(self, device_id: Optional[int] = None, scan_duration: int = 10,
track_devices: Optional[List[str]] = None, **kwargs):
""" """
:param device_id: Bluetooth adapter ID to use (default configured on the ``bluetooth`` plugin if None). :param device_id: Bluetooth adapter ID to use (default configured on the ``bluetooth`` plugin if None).
:param scan_duration: How long the scan should run (default: 10 seconds). :param scan_duration: How long the scan should run (default: 10 seconds).
:param active_scan: Set to True if you want to actively track the devices through a periodic :param track_devices: List of addresses of devices to actively track, even if they aren't discoverable.
``.lookup_name`` call. This is likely to produce a more accurate tracking, but it may negatively impact the
duration of devices that run on battery.
""" """
super().__init__(plugin='bluetooth', plugin_args={ super().__init__(plugin='bluetooth', plugin_args={
'device_id': device_id, 'device_id': device_id,
@ -37,10 +36,9 @@ class BluetoothScannerBackend(SensorBackend):
}, **kwargs) }, **kwargs)
self._last_seen_devices = {} self._last_seen_devices = {}
self._devices_to_track = set()
self._tracking_thread: Optional[Thread] = None self._tracking_thread: Optional[Thread] = None
self._bt_lock = RLock() self._bt_lock = RLock()
self.active_scan = active_scan self.track_devices = set(track_devices or [])
self.scan_duration = scan_duration self.scan_duration = scan_duration
def _add_last_seen_device(self, dev): def _add_last_seen_device(self, dev):
@ -49,9 +47,6 @@ class BluetoothScannerBackend(SensorBackend):
self.bus.post(BluetoothDeviceFoundEvent(address=addr, **dev)) self.bus.post(BluetoothDeviceFoundEvent(address=addr, **dev))
self._last_seen_devices[addr] = {'addr': addr, **dev} self._last_seen_devices[addr] = {'addr': addr, **dev}
if self.active_scan and addr not in self._devices_to_track:
self._devices_to_track.add(addr)
def _remove_last_seen_device(self, addr: str): def _remove_last_seen_device(self, addr: str):
dev = self._last_seen_devices.get(addr) dev = self._last_seen_devices.get(addr)
if not dev: if not dev:
@ -62,7 +57,7 @@ class BluetoothScannerBackend(SensorBackend):
def _addr_tracker(self, addr): def _addr_tracker(self, addr):
with self._bt_lock: with self._bt_lock:
name = get_plugin('bluetooth').lookup_name(addr, timeout=self.scan_duration) name = get_plugin('bluetooth').lookup_name(addr, timeout=self.scan_duration).name
if name is None: if name is None:
self._remove_last_seen_device(addr) self._remove_last_seen_device(addr)
@ -73,7 +68,7 @@ class BluetoothScannerBackend(SensorBackend):
self.logger.info('Starting Bluetooth tracker') self.logger.info('Starting Bluetooth tracker')
while not self.should_stop(): while not self.should_stop():
trackers = [] trackers = []
for addr in self._devices_to_track: for addr in self.track_devices:
tracker = Thread(target=self._addr_tracker, args=(addr,)) tracker = Thread(target=self._addr_tracker, args=(addr,))
tracker.start() tracker.start()
trackers.append(tracker) trackers.append(tracker)
@ -93,16 +88,13 @@ class BluetoothScannerBackend(SensorBackend):
for addr, dev in data.items(): for addr, dev in data.items():
self._add_last_seen_device(dev) self._add_last_seen_device(dev)
if not self.active_scan: for addr, dev in self._last_seen_devices.copy().items():
for addr, dev in self._last_seen_devices.copy().items(): if addr not in data and addr not in self.track_devices:
if addr not in data: self._remove_last_seen_device(addr)
self._remove_last_seen_device(addr)
def run(self): def run(self):
if self.active_scan: self._tracking_thread = Thread(target=self._bt_tracker)
self._tracking_thread = Thread(target=self._bt_tracker) self._tracking_thread.start()
self._tracking_thread.start()
super().run() super().run()
def on_stop(self): def on_stop(self):