115 lines
3.4 KiB
Python
115 lines
3.4 KiB
Python
"""Support for sensor value(s) stored in local files."""
|
|
|
|
from __future__ import annotations
|
|
|
|
import logging
|
|
import os
|
|
|
|
from file_read_backwards import FileReadBackwards
|
|
import voluptuous as vol
|
|
|
|
from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
|
|
from homeassistant.config_entries import ConfigEntry
|
|
from homeassistant.const import (
|
|
CONF_FILE_PATH,
|
|
CONF_NAME,
|
|
CONF_UNIT_OF_MEASUREMENT,
|
|
CONF_VALUE_TEMPLATE,
|
|
)
|
|
from homeassistant.core import HomeAssistant
|
|
from homeassistant.helpers import config_validation as cv
|
|
from homeassistant.helpers.entity_platform import AddEntitiesCallback
|
|
from homeassistant.helpers.template import Template
|
|
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
|
|
|
|
from .const import DEFAULT_NAME, FILE_ICON
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
|
|
{
|
|
vol.Required(CONF_FILE_PATH): cv.isfile,
|
|
vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
|
|
vol.Optional(CONF_VALUE_TEMPLATE): cv.string,
|
|
vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string,
|
|
}
|
|
)
|
|
|
|
|
|
async def async_setup_platform(
|
|
hass: HomeAssistant,
|
|
config: ConfigType,
|
|
async_add_entities: AddEntitiesCallback,
|
|
discovery_info: DiscoveryInfoType | None = None,
|
|
) -> None:
|
|
"""Set up the file sensor from YAML.
|
|
|
|
The YAML platform config is automatically
|
|
imported to a config entry, this method can be removed
|
|
when YAML support is removed.
|
|
"""
|
|
|
|
|
|
async def async_setup_entry(
|
|
hass: HomeAssistant,
|
|
entry: ConfigEntry,
|
|
async_add_entities: AddEntitiesCallback,
|
|
) -> None:
|
|
"""Set up the file sensor."""
|
|
config = dict(entry.data)
|
|
file_path: str = config[CONF_FILE_PATH]
|
|
unique_id: str = entry.entry_id
|
|
name: str = config.get(CONF_NAME, DEFAULT_NAME)
|
|
unit: str | None = config.get(CONF_UNIT_OF_MEASUREMENT)
|
|
value_template: Template | None = None
|
|
|
|
if CONF_VALUE_TEMPLATE in config:
|
|
value_template = Template(config[CONF_VALUE_TEMPLATE], hass)
|
|
|
|
async_add_entities(
|
|
[FileSensor(unique_id, name, file_path, unit, value_template)], True
|
|
)
|
|
|
|
|
|
class FileSensor(SensorEntity):
|
|
"""Implementation of a file sensor."""
|
|
|
|
_attr_icon = FILE_ICON
|
|
|
|
def __init__(
|
|
self,
|
|
unique_id: str,
|
|
name: str,
|
|
file_path: str,
|
|
unit_of_measurement: str | None,
|
|
value_template: Template | None,
|
|
) -> None:
|
|
"""Initialize the file sensor."""
|
|
self._attr_name = name
|
|
self._file_path = file_path
|
|
self._attr_native_unit_of_measurement = unit_of_measurement
|
|
self._val_tpl = value_template
|
|
self._attr_unique_id = unique_id
|
|
|
|
def update(self) -> None:
|
|
"""Get the latest entry from a file and updates the state."""
|
|
try:
|
|
with FileReadBackwards(self._file_path, encoding="utf-8") as file_data:
|
|
for line in file_data:
|
|
data = line
|
|
break
|
|
data = data.strip()
|
|
except (IndexError, FileNotFoundError, IsADirectoryError, UnboundLocalError):
|
|
_LOGGER.warning(
|
|
"File or data not present at the moment: %s",
|
|
os.path.basename(self._file_path),
|
|
)
|
|
return
|
|
|
|
if self._val_tpl is not None:
|
|
self._attr_native_value = (
|
|
self._val_tpl.async_render_with_possible_json_value(data, None)
|
|
)
|
|
else:
|
|
self._attr_native_value = data
|