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import asyncio
import json
import logging
import threading
from ..database.sqlite import SQLiteBase
from ..config import config
from .. import http
from typing import Type
from ..util import Addr
logger = logging.getLogger(__name__)
class SoundSensorHitHandler(asyncio.DatagramProtocol):
def datagram_received(self, data, addr):
try:
data = json.loads(data)
except json.JSONDecodeError as e:
logger.error('failed to parse json datagram')
logger.exception(e)
return
try:
name, hits = data
except (ValueError, IndexError) as e:
logger.error('failed to unpack data')
logger.exception(e)
return
self.handler(name, hits)
def handler(self, name: str, hits: int):
pass
class Database(SQLiteBase):
SCHEMA = 1
def __init__(self):
super().__init__(dbname='sound_sensor_server')
def schema_init(self, version: int) -> None:
cursor = self.cursor()
if version < 1:
cursor.execute("CREATE TABLE IF NOT EXISTS status (guard_enabled INTEGER NOT NULL)")
cursor.execute("INSERT INTO status (guard_enabled) VALUES (-1)")
self.commit()
def get_guard_enabled(self) -> int:
cur = self.cursor()
cur.execute("SELECT guard_enabled FROM status LIMIT 1")
return int(cur.fetchone()[0])
def set_guard_enabled(self, enabled: bool) -> None:
cur = self.cursor()
cur.execute("UPDATE status SET guard_enabled=?", (int(enabled),))
class SoundSensorServer:
def __init__(self,
addr: Addr,
handler_impl: Type[SoundSensorHitHandler]):
self.addr = addr
self.impl = handler_impl
self.db = Database()
self._recording_lock = threading.Lock()
self._recording_enabled = True
if self.guard_control_enabled():
current_status = self.db.get_guard_enabled()
if current_status == -1:
self.set_recording(config['server']['guard_recording_default']
if 'guard_recording_default' in config['server']
else False)
else:
self.set_recording(bool(current_status), update=False)
@staticmethod
def guard_control_enabled() -> bool:
return 'guard_control' in config['server'] and config['server']['guard_control'] is True
def set_recording(self, enabled: bool, update=True):
with self._recording_lock:
self._recording_enabled = enabled
if update:
self.db.set_guard_enabled(enabled)
def is_recording_enabled(self) -> bool:
with self._recording_lock:
return self._recording_enabled
def run(self):
if self.guard_control_enabled():
t = threading.Thread(target=self.run_guard_server)
t.daemon = True
t.start()
loop = asyncio.get_event_loop()
t = loop.create_datagram_endpoint(self.impl, local_addr=self.addr)
loop.run_until_complete(t)
loop.run_forever()
def run_guard_server(self):
routes = http.routes()
@routes.post('/guard/enable')
async def guard_enable(request):
self.set_recording(True)
return http.ok()
@routes.post('/guard/disable')
async def guard_disable(request):
self.set_recording(False)
return http.ok()
@routes.get('/guard/status')
async def guard_status(request):
return http.ok({'enabled': self.is_recording_enabled()})
asyncio.set_event_loop(asyncio.new_event_loop()) # need to create new event loop in new thread
http.serve(self.addr, routes, handle_signals=False) # handle_signals=True doesn't work in separate thread
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