Add initial version of Vilfo Router integration (home-assistant#31177)

* Initial implementation of Vilfo router integration.

This commit is a combination of several commits, with commit messages in bullet form below.

* Added additional files to Vilfo integration.
* Added generated files.
* Fixed alphabetic order in generated config_flows.
* Continued implementation of config flow for Vilfo integration.
* Continued work on config_flow for Vilfo.
* Updated requirements in manifest for Vilfo Router integration.
* Some strings added to Vilfo Router integration.
* Vilfo Router integration updated with sensor support.
* Code style cleanup.
* Additional cleanup of config flow.
* Added additional UI strings for Vilfo Router
* Updated tests of config flow and fixed formatting
* Updated requirement upon vilfo-api-client.
* Sensor refactoring including support for icons
* Code style changes for Vilfo Router integration
* Code cleanup
* Fixed linting issues in Vilfo Router integration
* Fixed import order in test for Vilfo integration.

* Updates to Vilfo Router integration based on feedback

Based on the feedback received, updates have been made to the Vilfo Router integration.

A couple of the points mentioned have not been addressed yet, since the appropriate action has not yet been determined. These are:

* home-assistant#31177 (comment)
* home-assistant#31177 (comment)

This commit consists of:

    * Removed unused folder/submodule
    * Fixes to __init__
    * Fixes to config_flow
    * Fixes to const
    * Refactored sensors and applied fixes
    * Fix issue with wrong exception type in config flow
    * Updated tests for Vilfo integration config_flow
    * Updated dependency upon vilfo-api-client to improve testability
    * Import order fixes in test
    * Use constants instead of strings in tests

* Updated the VilfoRouterData class to only use the hostname as unique_id when it is the default one (admin.vilfo.com).

* Refactored based on feedback during review.

* Changes to constant names,
* Blocking IO separated to executor job,
* Data for uptime sensor changed from being computed to being a timestamp,
* Started refactoring uptime sensor in terms of naming and unit.
* Updated constants for boot time (previously uptime) sensor.
* Refactored test of Vilfo config flow to avoid patching code under test.
* UI naming fixes and better exception handling.

* Removed unused exception class.

* Various changes to Vilfo Router integration.

* Removed unit of measurement for boot time sensor,
* Added support for a sensor not having a unit,
* Updated the config_flow to handle when the integration is already configured,
* Updated tests to avoid mocking the code under test and also to cover the aforementioned changes.

* Exception handling in Vilfo Router config flow refactored to be more readable.

* Refactored constant usage, fixed sensor availability and fix API client library doing I/O in async context.

* Updated signature with hass first

* Update call to constructor with changed order of arguments

.coveragerc

@@ -788,6 +788,9 @@ omit =
     homeassistant/components/vesync/switch.py
     homeassistant/components/viaggiatreno/sensor.py
     homeassistant/components/vicare/*
+    homeassistant/components/vilfo/__init__.py
+    homeassistant/components/vilfo/sensor.py
+    homeassistant/components/vilfo/const.py
     homeassistant/components/vivotek/camera.py
     homeassistant/components/vlc/media_player.py
     homeassistant/components/vlc_telnet/media_player.py

CODEOWNERS

@@ -385,6 +385,7 @@ homeassistant/components/versasense/* @flamm3blemuff1n
 homeassistant/components/version/* @fabaff
 homeassistant/components/vesync/* @markperdue @webdjoe
 homeassistant/components/vicare/* @oischinger
+homeassistant/components/vilfo/* @ManneW
 homeassistant/components/vivotek/* @HarlemSquirrel
 homeassistant/components/vizio/* @raman325
 homeassistant/components/vlc_telnet/* @rodripf

homeassistant/components/vilfo/__init__.py

@@ -0,0 +1,125 @@
+"""The Vilfo Router integration."""
+import asyncio
+from datetime import timedelta
+import logging
+
+from vilfo import Client as VilfoClient
+from vilfo.exceptions import VilfoException
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import ConfigEntryNotReady
+from homeassistant.helpers.typing import ConfigType, HomeAssistantType
+from homeassistant.util import Throttle
+
+from .const import ATTR_BOOT_TIME, ATTR_LOAD, DOMAIN, ROUTER_DEFAULT_HOST
+
+PLATFORMS = ["sensor"]
+
+DEFAULT_SCAN_INTERVAL = timedelta(seconds=30)
+
+_LOGGER = logging.getLogger(__name__)
+
+
+async def async_setup(hass: HomeAssistantType, config: ConfigType):
+    """Set up the Vilfo Router component."""
+    hass.data.setdefault(DOMAIN, {})
+    return True
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
+    """Set up Vilfo Router from a config entry."""
+    host = entry.data[CONF_HOST]
+    access_token = entry.data[CONF_ACCESS_TOKEN]
+
+    vilfo_router = VilfoRouterData(hass, host, access_token)
+
+    await vilfo_router.async_update()
+
+    if not vilfo_router.available:
+        raise ConfigEntryNotReady
+
+    hass.data[DOMAIN][entry.entry_id] = vilfo_router
+
+    for platform in PLATFORMS:
+        hass.async_create_task(
+            hass.config_entries.async_forward_entry_setup(entry, platform)
+        )
+
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry):
+    """Unload a config entry."""
+    unload_ok = all(
+        await asyncio.gather(
+            *[
+                hass.config_entries.async_forward_entry_unload(entry, platform)
+                for platform in PLATFORMS
+            ]
+        )
+    )
+    if unload_ok:
+        hass.data[DOMAIN].pop(entry.entry_id)
+
+    return unload_ok
+
+
+class VilfoRouterData:
+    """Define an object to hold sensor data."""
+
+    def __init__(self, hass, host, access_token):
+        """Initialize."""
+        self._vilfo = VilfoClient(host, access_token)
+        self.hass = hass
+        self.host = host
+        self.available = False
+        self.firmware_version = None
+        self.mac_address = self._vilfo.mac
+        self.data = {}
+        self._unavailable_logged = False
+
+    @property
+    def unique_id(self):
+        """Get the unique_id for the Vilfo Router."""
+        if self.mac_address:
+            return self.mac_address
+
+        if self.host == ROUTER_DEFAULT_HOST:
+            return self.host
+
+        return self.host
+
+    def _fetch_data(self):
+        board_information = self._vilfo.get_board_information()
+        load = self._vilfo.get_load()
+
+        return {
+            "board_information": board_information,
+            "load": load,
+        }
+
+    @Throttle(DEFAULT_SCAN_INTERVAL)
+    async def async_update(self):
+        """Update data using calls to VilfoClient library."""
+        try:
+            data = await self.hass.async_add_executor_job(self._fetch_data)
+
+            self.firmware_version = data["board_information"]["version"]
+            self.data[ATTR_BOOT_TIME] = data["board_information"]["bootTime"]
+            self.data[ATTR_LOAD] = data["load"]
+
+            self.available = True
+        except VilfoException as error:
+            if not self._unavailable_logged:
+                _LOGGER.error(
+                    "Could not fetch data from %s, error: %s", self.host, error
+                )
+                self._unavailable_logged = True
+            self.available = False
+            return
+
+        if self.available and self._unavailable_logged:
+            _LOGGER.info("Vilfo Router %s is available again", self.host)
+            self._unavailable_logged = False

homeassistant/components/vilfo/config_flow.py

@@ -0,0 +1,147 @@
+"""Config flow for Vilfo Router integration."""
+import ipaddress
+import logging
+import re
+
+from vilfo import Client as VilfoClient
+from vilfo.exceptions import (
+    AuthenticationException as VilfoAuthenticationException,
+    VilfoException,
+)
+import voluptuous as vol
+
+from homeassistant import config_entries, core, exceptions
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST, CONF_ID, CONF_MAC
+
+from .const import DOMAIN  # pylint:disable=unused-import
+from .const import ROUTER_DEFAULT_HOST
+
+_LOGGER = logging.getLogger(__name__)
+
+DATA_SCHEMA = vol.Schema(
+    {
+        vol.Required(CONF_HOST, default=ROUTER_DEFAULT_HOST): str,
+        vol.Required(CONF_ACCESS_TOKEN, default=""): str,
+    }
+)
+
+RESULT_SUCCESS = "success"
+RESULT_CANNOT_CONNECT = "cannot_connect"
+RESULT_INVALID_AUTH = "invalid_auth"
+
+
+def host_valid(host):
+    """Return True if hostname or IP address is valid."""
+    try:
+        if ipaddress.ip_address(host).version == (4 or 6):
+            return True
+    except ValueError:
+        disallowed = re.compile(r"[^a-zA-Z\d\-]")
+        return all(x and not disallowed.search(x) for x in host.split("."))
+
+
+def _try_connect_and_fetch_basic_info(host, token):
+    """Attempt to connect and call the ping endpoint and, if successful, fetch basic information."""
+
+    # Perform the ping. This doesn't validate authentication.
+    controller = VilfoClient(host=host, token=token)
+    result = {"type": None, "data": {}}
+
+    try:
+        controller.ping()
+    except VilfoException:
+        result["type"] = RESULT_CANNOT_CONNECT
+        result["data"] = CannotConnect
+        return result
+
+    # Perform a call that requires authentication.
+    try:
+        controller.get_board_information()
+    except VilfoAuthenticationException:
+        result["type"] = RESULT_INVALID_AUTH
+        result["data"] = InvalidAuth
+        return result
+
+    if controller.mac:
+        result["data"][CONF_ID] = controller.mac
+        result["data"][CONF_MAC] = controller.mac
+    else:
+        result["data"][CONF_ID] = host
+        result["data"][CONF_MAC] = None
+
+    result["type"] = RESULT_SUCCESS
+
+    return result
+
+
+async def validate_input(hass: core.HomeAssistant, data):
+    """Validate the user input allows us to connect.
+
+    Data has the keys from DATA_SCHEMA with values provided by the user.
+    """
+
+    # Validate the host before doing anything else.
+    if not host_valid(data[CONF_HOST]):
+        raise InvalidHost
+
+    config = {}
+
+    result = await hass.async_add_executor_job(
+        _try_connect_and_fetch_basic_info, data[CONF_HOST], data[CONF_ACCESS_TOKEN]
+    )
+
+    if result["type"] != RESULT_SUCCESS:
+        raise result["data"]
+
+    # Return some info we want to store in the config entry.
+    result_data = result["data"]
+    config["title"] = f"{data[CONF_HOST]}"
+    config[CONF_MAC] = result_data[CONF_MAC]
+    config[CONF_HOST] = data[CONF_HOST]
+    config[CONF_ID] = result_data[CONF_ID]
+
+    return config
+
+
+class DomainConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle a config flow for Vilfo Router."""
+
+    VERSION = 1
+    CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
+
+    async def async_step_user(self, user_input=None):
+        """Handle the initial step."""
+        errors = {}
+        if user_input is not None:
+            try:
+                info = await validate_input(self.hass, user_input)
+            except InvalidHost:
+                errors[CONF_HOST] = "wrong_host"
+            except CannotConnect:
+                errors["base"] = "cannot_connect"
+            except InvalidAuth:
+                errors["base"] = "invalid_auth"
+            except Exception as err:  # pylint: disable=broad-except
+                _LOGGER.error("Unexpected exception: %s", err)
+                errors["base"] = "unknown"
+            else:
+                await self.async_set_unique_id(info[CONF_ID])
+                self._abort_if_unique_id_configured()
+
+                return self.async_create_entry(title=info["title"], data=user_input)
+
+        return self.async_show_form(
+            step_id="user", data_schema=DATA_SCHEMA, errors=errors
+        )
+
+
+class CannotConnect(exceptions.HomeAssistantError):
+    """Error to indicate we cannot connect."""
+
+
+class InvalidAuth(exceptions.HomeAssistantError):
+    """Error to indicate there is invalid auth."""
+
+
+class InvalidHost(exceptions.HomeAssistantError):
+    """Error to indicate that hostname/IP address is invalid."""

homeassistant/components/vilfo/const.py

@@ -0,0 +1,36 @@
+"""Constants for the Vilfo Router integration."""
+from homeassistant.const import DEVICE_CLASS_TIMESTAMP
+
+DOMAIN = "vilfo"
+
+ATTR_API_DATA_FIELD = "api_data_field"
+ATTR_API_DATA_FIELD_LOAD = "load"
+ATTR_API_DATA_FIELD_BOOT_TIME = "boot_time"
+ATTR_DEVICE_CLASS = "device_class"
+ATTR_ICON = "icon"
+ATTR_LABEL = "label"
+ATTR_LOAD = "load"
+ATTR_UNIT = "unit"
+ATTR_BOOT_TIME = "boot_time"
+
+ROUTER_DEFAULT_HOST = "admin.vilfo.com"
+ROUTER_DEFAULT_MODEL = "Vilfo Router"
+ROUTER_DEFAULT_NAME = "Vilfo Router"
+ROUTER_MANUFACTURER = "Vilfo AB"
+
+UNIT_PERCENT = "%"
+
+SENSOR_TYPES = {
+    ATTR_LOAD: {
+        ATTR_LABEL: "Load",
+        ATTR_UNIT: UNIT_PERCENT,
+        ATTR_ICON: "mdi:memory",
+        ATTR_API_DATA_FIELD: ATTR_API_DATA_FIELD_LOAD,
+    },
+    ATTR_BOOT_TIME: {
+        ATTR_LABEL: "Boot time",
+        ATTR_ICON: "mdi:timer",
+        ATTR_API_DATA_FIELD: ATTR_API_DATA_FIELD_BOOT_TIME,
+        ATTR_DEVICE_CLASS: DEVICE_CLASS_TIMESTAMP,
+    },
+}

homeassistant/components/vilfo/manifest.json

@@ -0,0 +1,9 @@
+{
+  "domain": "vilfo",
+  "name": "Vilfo Router",
+  "config_flow": true,
+  "documentation": "https://www.home-assistant.io/integrations/vilfo",
+  "requirements": ["vilfo-api-client==0.3.2"],
+  "dependencies": [],
+  "codeowners": ["@ManneW"]
+}