__init__.py

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"""The Monoprice 6-Zone Amplifier integration."""
 
import logging
 
from pymonoprice import get_monoprice
from serial import SerialException
 
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import CONF_PORT, Platform
from homeassistant.core import HomeAssistant
from homeassistant.exceptions import ConfigEntryNotReady
 
from .const import (
    CONF_NOT_FIRST_RUN,
    DOMAIN,
    FIRST_RUN,
    MONOPRICE_OBJECT,
    UNDO_UPDATE_LISTENER,
)
 
PLATFORMS = [Platform.MEDIA_PLAYER]
 
_LOGGER = logging.getLogger(__name__)
 
 
async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Set up Monoprice 6-Zone Amplifier from a config entry."""
    port = entry.data[CONF_PORT]
 
    try:
        monoprice = await hass.async_add_executor_job(get_monoprice, port)
    except SerialException as err:
        _LOGGER.error("Error connecting to Monoprice controller at %s", port)
        raise ConfigEntryNotReady from err
 
    # double negative to handle absence of value
    first_run = not bool(entry.data.get(CONF_NOT_FIRST_RUN))
 
    if first_run:
        hass.config_entries.async_update_entry(
            entry, data={**entry.data, CONF_NOT_FIRST_RUN: True}
        )
 
    undo_listener = entry.add_update_listener(_update_listener)
 
    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = {
        MONOPRICE_OBJECT: monoprice,
        UNDO_UPDATE_LISTENER: undo_listener,
        FIRST_RUN: first_run,
    }
 
    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
 
    return True
 
 
async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Unload a config entry."""
    unload_ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
    if not unload_ok:
        return False
 
    hass.data[DOMAIN][entry.entry_id][UNDO_UPDATE_LISTENER]()
 
    def _cleanup(monoprice) -> None:
        """Destroy the Monoprice object.
 
        Destroying the Monoprice closes the serial connection, do it in an executor so the garbage
        collection does not block.
        """
        del monoprice
 
    monoprice = hass.data[DOMAIN][entry.entry_id][MONOPRICE_OBJECT]
    hass.data[DOMAIN].pop(entry.entry_id)
 
    await hass.async_add_executor_job(_cleanup, monoprice)
 
    return True
 
 
async def _update_listener(hass: HomeAssistant, entry: ConfigEntry) -> None:
    """Handle options update."""
    await hass.config_entries.async_reload(entry.entry_id)