"""
homeassistant.components.light
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Provides functionality to interact with lights.
It offers the following services:
TURN_OFF - Turns one or multiple lights off.
Supports following parameters:
- transition
Integer that represents the time the light should take to transition to
the new state.
- entity_id
String or list of strings that point at entity_ids of lights.
TURN_ON - Turns one or multiple lights on and change attributes.
Supports following parameters:
- transition
Integer that represents the time the light should take to transition to
the new state.
- entity_id
String or list of strings that point at entity_ids of lights.
- profile
String with the name of one of the built-in profiles (relax, energize,
concentrate, reading) or one of the custom profiles defined in
light_profiles.csv in the current working directory.
Light profiles define a xy color and a brightness.
If a profile is given and a brightness or xy color then the profile values
will be overwritten.
- xy_color
A list containing two floats representing the xy color you want the light
to be.
- rgb_color
A list containing three integers representing the xy color you want the
light to be.
- brightness
Integer between 0 and 255 representing how bright you want the light to be.
"""
import logging
import os
import csv
import homeassistant as ha
from homeassistant.loader import get_component
import homeassistant.util as util
from homeassistant.components import (
group, extract_entity_ids, STATE_ON,
SERVICE_TURN_ON, SERVICE_TURN_OFF, ATTR_ENTITY_ID)
DOMAIN = "light"
DEPENDENCIES = []
GROUP_NAME_ALL_LIGHTS = 'all_lights'
ENTITY_ID_ALL_LIGHTS = group.ENTITY_ID_FORMAT.format(
GROUP_NAME_ALL_LIGHTS)
ENTITY_ID_FORMAT = DOMAIN + ".{}"
# integer that represents transition time in seconds to make change
ATTR_TRANSITION = "transition"
# lists holding color values
ATTR_RGB_COLOR = "rgb_color"
ATTR_XY_COLOR = "xy_color"
# int with value 0 .. 255 representing brightness of the light
ATTR_BRIGHTNESS = "brightness"
# String representing a profile (built-in ones or external defined)
ATTR_PROFILE = "profile"
LIGHT_PROFILES_FILE = "light_profiles.csv"
_LOGGER = logging.getLogger(__name__)
def is_on(hass, entity_id=None):
""" Returns if the lights are on based on the statemachine. """
entity_id = entity_id or ENTITY_ID_ALL_LIGHTS
return hass.states.is_state(entity_id, STATE_ON)
# pylint: disable=too-many-arguments
def turn_on(hass, entity_id=None, transition=None, brightness=None,
rgb_color=None, xy_color=None, profile=None):
""" Turns all or specified light on. """
data = {}
if entity_id:
data[ATTR_ENTITY_ID] = entity_id
if profile:
data[ATTR_PROFILE] = profile
if transition is not None:
data[ATTR_TRANSITION] = transition
if brightness is not None:
data[ATTR_BRIGHTNESS] = brightness
if rgb_color:
data[ATTR_RGB_COLOR] = rgb_color
if xy_color:
data[ATTR_XY_COLOR] = xy_color
hass.services.call(DOMAIN, SERVICE_TURN_ON, data)
def turn_off(hass, entity_id=None, transition=None):
""" Turns all or specified light off. """
data = {}
if entity_id:
data[ATTR_ENTITY_ID] = entity_id
if transition is not None:
data[ATTR_TRANSITION] = transition
hass.services.call(DOMAIN, SERVICE_TURN_OFF, data)
# pylint: disable=too-many-branches, too-many-locals
def setup(hass, config):
""" Exposes light control via statemachine and services. """
if not util.validate_config(config, {DOMAIN: [ha.CONF_TYPE]}, _LOGGER):
return False
# Load built-in profiles and custom profiles
profile_paths = [os.path.join(os.path.dirname(__file__),
LIGHT_PROFILES_FILE),
hass.get_config_path(LIGHT_PROFILES_FILE)]
profiles = {}
for profile_path in profile_paths:
if os.path.isfile(profile_path):
with open(profile_path) as inp:
reader = csv.reader(inp)
# Skip the header
next(reader, None)
try:
for profile_id, color_x, color_y, brightness in reader:
profiles[profile_id] = (float(color_x), float(color_y),
int(brightness))
except ValueError:
# ValueError if not 4 values per row
# ValueError if convert to float/int failed
_LOGGER.error(
"Error parsing light profiles from %s", profile_path)
return False
# Load platform
light_type = config[DOMAIN][ha.CONF_TYPE]
light_init = get_component('light.{}'.format(light_type))
if light_init is None:
_LOGGER.error("Unknown light type specified: %s", light_type)
return False
lights = light_init.get_lights(hass, config[DOMAIN])
if len(lights) == 0:
_LOGGER.error("No lights found")
return False
ent_to_light = {}
no_name_count = 1
for light in lights:
name = light.get_name()
if name is None:
name = "Light #{}".format(no_name_count)
no_name_count += 1
entity_id = util.ensure_unique_string(
ENTITY_ID_FORMAT.format(util.slugify(name)),
list(ent_to_light.keys()))
light.entity_id = entity_id
ent_to_light[entity_id] = light
# pylint: disable=unused-argument
def update_lights_state(now):
""" Update the states of all the lights. """
for light in lights:
light.update_ha_state(hass)
update_lights_state(None)
# Track all lights in a group
group.setup_group(
hass, GROUP_NAME_ALL_LIGHTS, ent_to_light.keys(), False)
def handle_light_service(service):
""" Hande a turn light on or off service call. """
# Get and validate data
dat = service.data
# Convert the entity ids to valid light ids
lights = [ent_to_light[entity_id] for entity_id
in extract_entity_ids(hass, service)
if entity_id in ent_to_light]
if not lights:
lights = list(ent_to_light.values())
params = {}
transition = util.convert(dat.get(ATTR_TRANSITION), int)
if transition is not None:
params[ATTR_TRANSITION] = transition
if service.service == SERVICE_TURN_OFF:
for light in lights:
# pylint: disable=star-args
light.turn_off(**params)
else:
# Processing extra data for turn light on request
# We process the profile first so that we get the desired
# behavior that extra service data attributes overwrite
# profile values
profile = profiles.get(dat.get(ATTR_PROFILE))
if profile:
# *color, bright = profile
*params[ATTR_XY_COLOR], params[ATTR_BRIGHTNESS] = profile
if ATTR_BRIGHTNESS in dat:
# We pass in the old value as the default parameter if parsing
# of the new one goes wrong.
params[ATTR_BRIGHTNESS] = util.convert(
dat.get(ATTR_BRIGHTNESS), int, params.get(ATTR_BRIGHTNESS))
if ATTR_XY_COLOR in dat:
try:
# xy_color should be a list containing 2 floats
xycolor = dat.get(ATTR_XY_COLOR)
# Without this check, a xycolor with value '99' would work
if not isinstance(xycolor, str):
params[ATTR_XY_COLOR] = [float(val) for val in xycolor]
except (TypeError, ValueError):
# TypeError if xy_color is not iterable
# ValueError if value could not be converted to float
pass
if ATTR_RGB_COLOR in dat:
try:
# rgb_color should be a list containing 3 ints
rgb_color = dat.get(ATTR_RGB_COLOR)
if len(rgb_color) == 3:
params[ATTR_XY_COLOR] = \
util.color_RGB_to_xy(int(rgb_color[0]),
int(rgb_color[1]),
int(rgb_color[2]))
except (TypeError, ValueError):
# TypeError if rgb_color is not iterable
# ValueError if not all values can be converted to int
pass
for light in lights:
# pylint: disable=star-args
light.turn_on(**params)
for light in lights:
light.update_ha_state(hass, True)
# Update light state every 30 seconds
hass.track_time_change(update_lights_state, second=[0, 30])
# Listen for light on and light off service calls
hass.services.register(DOMAIN, SERVICE_TURN_ON,
handle_light_service)
hass.services.register(DOMAIN, SERVICE_TURN_OFF,
handle_light_service)
return True