"""The core instance for HomeControl"""
import argparse
import asyncio
import logging
import os
import signal
from contextlib import suppress
from typing import Optional
from homecontrol.const import (EVENT_CORE_BOOTSTRAP_COMPLETE, EXIT_RESTART,
EXIT_SHUTDOWN)
from homecontrol.dependencies.config_manager import ConfigManager
from homecontrol.dependencies.event_engine import EventEngine
from homecontrol.dependencies.item_manager import ItemManager
from homecontrol.dependencies.module_manager import ModuleManager
LOGGER = logging.getLogger(__name__)
# pylint: disable=too-many-instance-attributes
[docs]class Core:
"""
Represents the root object for HomeControl
"""
# pylint: disable=too-many-arguments
def __init__(self,
cfg: dict,
cfg_file: str,
loop: Optional[asyncio.AbstractEventLoop] = None,
start_args: Optional[argparse.Namespace] = None) -> None:
"""
:param cfg: config dictionary
:param cfg_file: configuration file
:param loop: asyncio EventLoop
:param start_args: start parameters
"""
self.start_args = start_args or argparse.Namespace()
self.loop = loop or asyncio.get_event_loop()
self.cfg = ConfigManager(cfg, cfg_file)
self.cfg_path = cfg_file
self.cfg_dir = os.path.dirname(cfg_file)
self.block_future = asyncio.Future()
self.event_engine = EventEngine(core=self)
self.module_manager = ModuleManager(core=self)
self.modules = self.module_manager.module_accessor
self.item_manager = ItemManager(core=self)
[docs] async def bootstrap(self) -> None:
"""
Startup coroutine for Core
"""
if not os.name == "nt": # Windows does not have signals
self.loop.add_signal_handler(signal.SIGINT, self.shutdown)
self.loop.add_signal_handler(signal.SIGTERM, self.shutdown)
else:
# Windows needs its special signal handling
signal.signal(signal.SIGINT, self.shutdown)
signal.signal(signal.SIGTERM, self.shutdown)
# Load modules
await self.module_manager.init()
# Init items
await self.item_manager.init()
self.event_engine.broadcast(EVENT_CORE_BOOTSTRAP_COMPLETE)
LOGGER.info("Core bootstrap complete")
[docs] async def block_until_stop(self) -> int:
"""
Blocking method to keep HomeControl running
until Core.block_future is done
Also triggers the stop coroutine when block_future has a result
"""
with suppress(asyncio.CancelledError):
exit_return = await self.block_future
await self.stop()
return exit_return
[docs] async def stop(self) -> None:
"""Stops HomeControl"""
LOGGER.warning("Shutting Down")
await self.item_manager.stop()
await self.module_manager.stop()
pending = [task
for task
in asyncio.all_tasks(loop=self.loop)
if task is not asyncio.current_task(loop=self.loop)]
if pending:
LOGGER.info("Waiting for pending tasks (1s)")
await asyncio.wait(pending, loop=self.loop, timeout=1)
LOGGER.warning("Closing the loop soon")
self.loop.call_soon(self.loop.stop)
[docs] def restart(self) -> None:
"""Restarts HomeControl"""
self.block_future.set_result(EXIT_RESTART)
[docs] def shutdown(self) -> None:
"""Shuts HomeControl down"""
self.block_future.set_result(EXIT_SHUTDOWN)