82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
|
import datetime
|
||
|
|
import logging
|
||
|
|
import typing
|
||
|
|
from typing import Any, Optional, Callable
|
||
|
|
|
||
|
|
from paho.mqtt.client import Client as Client
|
||
|
|
|
||
|
|
_logger = logging.getLogger("door_pi_control").getChild("util")
|
||
|
|
|
||
|
|
class Value:
|
||
|
|
def __init__(self,
|
||
|
|
client: Client,
|
||
|
|
topic: str,
|
||
|
|
start_value: Any = None,
|
||
|
|
*,
|
||
|
|
persistent: bool = False,
|
||
|
|
translate: typing.Union[
|
||
|
|
None,
|
||
|
|
typing.Dict[Any, str],
|
||
|
|
typing.Callable]
|
||
|
|
= None,
|
||
|
|
max_update: float = 0.1):
|
||
|
|
self.client = client
|
||
|
|
self.topic = topic
|
||
|
|
self.persistent = persistent
|
||
|
|
self.value = start_value
|
||
|
|
self.last_update = datetime.datetime.now() - datetime.timedelta(
|
||
|
|
seconds=max_update)
|
||
|
|
self.last_update_value = None
|
||
|
|
self.max_update = max_update
|
||
|
|
|
||
|
|
if translate is None:
|
||
|
|
self.translate: Callable = str
|
||
|
|
elif callable(translate):
|
||
|
|
self.translate = translate
|
||
|
|
else:
|
||
|
|
self.translate = lambda x: translate[x]
|
||
|
|
|
||
|
|
if start_value is not None:
|
||
|
|
self.update(start_value)
|
||
|
|
|
||
|
|
def update(self, value: Any, *,
|
||
|
|
force: bool = False,
|
||
|
|
no_update: bool = False) -> None:
|
||
|
|
if value != self.value or value != self.last_update_value:
|
||
|
|
self.value = value
|
||
|
|
if value is not None and \
|
||
|
|
(force
|
||
|
|
or (not no_update
|
||
|
|
and value != self.last_update_value
|
||
|
|
and (datetime.datetime.now()
|
||
|
|
- self.last_update
|
||
|
|
).total_seconds() >= self.max_update)):
|
||
|
|
self.last_update = datetime.datetime.now()
|
||
|
|
self.last_update_value = value
|
||
|
|
if self.client is not None:
|
||
|
|
self.client.publish(
|
||
|
|
self.topic,
|
||
|
|
self.translate(value),
|
||
|
|
qos=2,
|
||
|
|
retain=self.persistent)
|
||
|
|
|
||
|
|
def force_update(self, value) -> None:
|
||
|
|
self.update(value, force=True)
|
||
|
|
|
||
|
|
def __call__(self, value=None, **kwargs) -> typing.Optional[Any]:
|
||
|
|
if value is not None:
|
||
|
|
self.update(value, **kwargs)
|
||
|
|
return value
|
||
|
|
return self.value
|
||
|
|
|
||
|
|
def str(self):
|
||
|
|
return self.translate(self.value)
|
||
|
|
|
||
|
|
def reconnecting_client(host: str, *, keepalive: int = 60):
|
||
|
|
client = Client()
|
||
|
|
client.on_connect = lambda client, userdata, flags, rc: \
|
||
|
|
_logger.debug("Connected to mqtt host")
|
||
|
|
client.connect_async(host, keepalive=keepalive)
|
||
|
|
client.loop_start()
|
||
|
|
return client
|