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config_flow.py
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config_flow.py
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"""Config flow"""
from __future__ import annotations
import logging
import voluptuous as vol
import re
from homeassistant import config_entries, exceptions
from homeassistant.const import CONF_HOST, CONF_NAME, CONF_UNIQUE_ID
from homeassistant.core import HomeAssistant
from audiocontrol_director_telnet.telnet_client import TelnetClient
from .const import DOMAIN
_LOGGER = logging.getLogger(__name__)
INIT_DATA_SCHEMA = vol.Schema({vol.Required(CONF_HOST): str})
IDENTIFIERS_DATA_SCHEMA = vol.Schema(
{vol.Required(CONF_UNIQUE_ID): str, vol.Required(CONF_NAME): str}
)
def is_valid_hostname(hostname):
"""Validate hostname string"""
if len(hostname) > 255:
return False
if hostname[-1] == ".":
hostname = hostname[:-1] # strip exactly one dot from the right, if present
allowed = re.compile(r"(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
return all(allowed.match(x) for x in hostname.split("."))
async def async_validate_host(hass: HomeAssistant, data: dict):
"""Validate the user input, allowing us to connect.
Data has the keys from INIT_DATA_SCHEMA with values provided by the user.
"""
# Validate the data can be used to set up a connection.
if not is_valid_hostname(data[CONF_HOST]):
raise InvalidHost
telnet_client = TelnetClient(data[CONF_HOST])
# Ensure connection succeeds and sample command works
try:
await telnet_client.async_connect()
await telnet_client.async_get_system_status()
except Exception as exc:
raise CannotConnect from exc
class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
"""Handle a config flow for AudioControl Director M6400/M6800."""
VERSION = 1
# Pick one of the available connection classes in homeassistant/config_entries.py
# This tells HA if it should be asking for updates, or it'll be notified of updates
# automatically.
CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
def __init__(self) -> None:
self._host = None
async def async_step_user(self, user_input=None):
"""Start the user config flow."""
return await self.async_step_init()
async def async_step_init(self, user_input=None):
"""Handle the initial step."""
errors = {}
if user_input is not None:
try:
await async_validate_host(self.hass, user_input)
self._host = user_input[CONF_HOST]
return await self.async_step_identifiers()
except CannotConnect:
errors[CONF_HOST] = "cannot_connect"
except InvalidHost:
errors[CONF_HOST] = "invalid_host"
except:
_LOGGER.exception("Unexpected exception")
errors["base"] = "unknown"
raise
return self.async_show_form(
step_id="init", data_schema=INIT_DATA_SCHEMA, errors=errors
)
async def async_step_identifiers(self, user_input=None):
"""Handle the identifiers step."""
errors = {}
if user_input is not None:
await self.async_set_unique_id(user_input[CONF_UNIQUE_ID])
self._abort_if_unique_id_configured()
entry_data = {
"host": self._host,
"unique_id": user_input[CONF_UNIQUE_ID],
"name": user_input[CONF_NAME],
}
return self.async_create_entry(title=entry_data["name"], data=entry_data)
return self.async_show_form(
step_id="identifiers", data_schema=IDENTIFIERS_DATA_SCHEMA, errors=errors
)
class CannotConnect(exceptions.HomeAssistantError):
"""Error to indicate we cannot connect."""
class InvalidHost(exceptions.HomeAssistantError):
"""Error to indicate there is an invalid hostname."""