5 files changed, 271 insertions, 0 deletions
diff --git a/include/py/homekit/soundsensor/__init__.py b/include/py/homekit/soundsensor/__init__.py
new file mode 100644
index 0000000..30052f8
--- /dev/null
+++ b/include/py/homekit/soundsensor/__init__.py
@@ -0,0 +1,22 @@
+import importlib
+
+__all__ = [
+    'SoundSensorNode',
+    'SoundSensorHitHandler',
+    'SoundSensorServer',
+    'SoundSensorServerGuardClient'
+]
+
+
+def __getattr__(name):
+    if name in __all__:
+        if name == 'SoundSensorNode':
+            file = 'node'
+        elif name == 'SoundSensorServerGuardClient':
+            file = 'server_client'
+        else:
+            file = 'server'
+        module = importlib.import_module(f'.{file}', __name__)
+        return getattr(module, name)
+
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
diff --git a/include/py/homekit/soundsensor/__init__.pyi b/include/py/homekit/soundsensor/__init__.pyi
new file mode 100644
index 0000000..cb34972
--- /dev/null
+++ b/include/py/homekit/soundsensor/__init__.pyi
@@ -0,0 +1,8 @@
+from .server import (
+    SoundSensorHitHandler as SoundSensorHitHandler,
+    SoundSensorServer as SoundSensorServer,
+)
+from .server_client import (
+    SoundSensorServerGuardClient as SoundSensorServerGuardClient
+)
+from .node import SoundSensorNode as SoundSensorNode
diff --git a/include/py/homekit/soundsensor/node.py b/include/py/homekit/soundsensor/node.py
new file mode 100644
index 0000000..292452f
--- /dev/null
+++ b/include/py/homekit/soundsensor/node.py
@@ -0,0 +1,75 @@
+import logging
+import threading
+
+from typing import Optional
+from time import sleep
+from ..util import stringify, send_datagram, Addr
+
+from pyA20.gpio import gpio
+from pyA20.gpio import port as gpioport
+
+logger = logging.getLogger(__name__)
+
+
+class SoundSensorNode:
+    def __init__(self,
+                 name: str,
+                 pinname: str,
+                 server_addr: Optional[Addr],
+                 threshold: int = 1,
+                 delay=0.005):
+
+        if not hasattr(gpioport, pinname):
+            raise ValueError(f'invalid pin {pinname}')
+
+        self.pin = getattr(gpioport, pinname)
+        self.name = name
+        self.delay = delay
+        self.threshold = threshold
+
+        self.server_addr = server_addr
+
+        self.hits = 0
+        self.hitlock = threading.Lock()
+
+        self.interrupted = False
+
+    def run(self):
+        try:
+            t = threading.Thread(target=self.sensor_reader)
+            t.daemon = True
+            t.start()
+
+            while True:
+                with self.hitlock:
+                    hits = self.hits
+                    self.hits = 0
+
+                if hits >= self.threshold:
+                    try:
+                        if self.server_addr is not None:
+                            send_datagram(stringify([self.name, hits]), self.server_addr)
+                        else:
+                            logger.debug(f'server reporting disabled, skipping reporting {hits} hits')
+                    except OSError as exc:
+                        logger.exception(exc)
+
+                sleep(1)
+
+        except (KeyboardInterrupt, SystemExit) as e:
+            self.interrupted = True
+            logger.info(str(e))
+
+    def sensor_reader(self):
+        gpio.init()
+        gpio.setcfg(self.pin, gpio.INPUT)
+        gpio.pullup(self.pin, gpio.PULLUP)
+
+        while not self.interrupted:
+            state = gpio.input(self.pin)
+            sleep(self.delay)
+
+            if not state:
+                with self.hitlock:
+                    logger.debug('got a hit')
+                    self.hits += 1
diff --git a/include/py/homekit/soundsensor/server.py b/include/py/homekit/soundsensor/server.py
new file mode 100644
index 0000000..a627390
--- /dev/null
+++ b/include/py/homekit/soundsensor/server.py
@@ -0,0 +1,128 @@
+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),))
+        self.commit()
+
+
+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,
+                                   update=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
diff --git a/include/py/homekit/soundsensor/server_client.py b/include/py/homekit/soundsensor/server_client.py
new file mode 100644
index 0000000..7eef996
--- /dev/null
+++ b/include/py/homekit/soundsensor/server_client.py
@@ -0,0 +1,38 @@
+import requests
+import logging
+
+from ..util import Addr
+from ..api.errors import ApiResponseError
+
+
+class SoundSensorServerGuardClient:
+    def __init__(self, addr: Addr):
+        self.endpoint = f'http://{addr[0]}:{addr[1]}'
+        self.logger = logging.getLogger(self.__class__.__name__)
+
+    def guard_enable(self):
+        return self._call('guard/enable', is_post=True)
+
+    def guard_disable(self):
+        return self._call('guard/disable', is_post=True)
+
+    def guard_status(self):
+        return self._call('guard/status')
+
+    def _call(self,
+              method: str,
+              is_post=False):
+
+        url = f'{self.endpoint}/{method}'
+        self.logger.debug(f'calling {url}')
+
+        r = requests.get(url) if not is_post else requests.post(url)
+
+        if r.status_code != 200:
+            response = r.json()
+            raise ApiResponseError(status_code=r.status_code,
+                                   error_type=response['error'],
+                                   error_message=response['message'] or None,
+                                   error_stacktrace=response['stacktrace'] if 'stacktrace' in response else None)
+
+        return r.json()['response']