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"""Template helper methods for rendering strings with Home Assistant data."""
from __future__ import annotations
from ast import literal_eval
import asyncio
import base64
import collections.abc
from collections.abc import Generator, Iterable
from contextlib import suppress
from contextvars import ContextVar
from datetime import datetime, timedelta
from functools import partial, wraps
import json
import logging
import math
from operator import attrgetter
import random
import re
import sys
from typing import Any, Callable, cast
from urllib.parse import urlencode as urllib_urlencode
import weakref
import jinja2
from jinja2 import pass_context
from jinja2.sandbox import ImmutableSandboxedEnvironment
from jinja2.utils import Namespace
import voluptuous as vol
from homeassistant.const import (
ATTR_ENTITY_ID,
ATTR_LATITUDE,
ATTR_LONGITUDE,
ATTR_UNIT_OF_MEASUREMENT,
LENGTH_METERS,
STATE_UNKNOWN,
)
from homeassistant.core import (
HomeAssistant,
State,
callback,
split_entity_id,
valid_entity_id,
)
from homeassistant.exceptions import TemplateError
from homeassistant.helpers import (
area_registry,
device_registry,
entity_registry,
location as loc_helper,
)
from homeassistant.helpers.typing import TemplateVarsType
from homeassistant.loader import bind_hass
from homeassistant.util import convert, dt as dt_util, location as loc_util
from homeassistant.util.async_ import run_callback_threadsafe
from homeassistant.util.thread import ThreadWithException
# mypy: allow-untyped-defs, no-check-untyped-defs
_LOGGER = logging.getLogger(__name__)
_SENTINEL = object()
DATE_STR_FORMAT = "%Y-%m-%d %H:%M:%S"
_RENDER_INFO = "template.render_info"
_ENVIRONMENT = "template.environment"
_ENVIRONMENT_LIMITED = "template.environment_limited"
_ENVIRONMENT_STRICT = "template.environment_strict"
_RE_JINJA_DELIMITERS = re.compile(r"\{%|\{\{|\{#")
# Match "simple" ints and floats. -1.0, 1, +5, 5.0
_IS_NUMERIC = re.compile(r"^[+-]?(?!0\d)\d*(?:\.\d*)?$")
_RESERVED_NAMES = {"contextfunction", "evalcontextfunction", "environmentfunction"}
_GROUP_DOMAIN_PREFIX = "group."
_COLLECTABLE_STATE_ATTRIBUTES = {
"state",
"attributes",
"last_changed",
"last_updated",
"context",
"domain",
"object_id",
"name",
}
ALL_STATES_RATE_LIMIT = timedelta(minutes=1)
DOMAIN_STATES_RATE_LIMIT = timedelta(seconds=1)
template_cv: ContextVar[str | None] = ContextVar("template_cv", default=None)
@bind_hass
def attach(hass: HomeAssistant, obj: Any) -> None:
"""Recursively attach hass to all template instances in list and dict."""
if isinstance(obj, list):
for child in obj:
attach(hass, child)
elif isinstance(obj, collections.abc.Mapping):
for child_key, child_value in obj.items():
attach(hass, child_key)
attach(hass, child_value)
elif isinstance(obj, Template):
obj.hass = hass
def render_complex(
value: Any, variables: TemplateVarsType = None, limited: bool = False
) -> Any:
"""Recursive template creator helper function."""
if isinstance(value, list):
return [render_complex(item, variables) for item in value]
if isinstance(value, collections.abc.Mapping):
return {
render_complex(key, variables): render_complex(item, variables)
for key, item in value.items()
}
if isinstance(value, Template):
return value.async_render(variables, limited=limited)
return value
def is_complex(value: Any) -> bool:
"""Test if data structure is a complex template."""
if isinstance(value, Template):
return True
if isinstance(value, list):
return any(is_complex(val) for val in value)
if isinstance(value, collections.abc.Mapping):
return any(is_complex(val) for val in value.keys()) or any(
is_complex(val) for val in value.values()
)
return False
def is_template_string(maybe_template: str) -> bool:
"""Check if the input is a Jinja2 template."""
return _RE_JINJA_DELIMITERS.search(maybe_template) is not None
class ResultWrapper:
"""Result wrapper class to store render result."""
render_result: str | None
def gen_result_wrapper(kls):
"""Generate a result wrapper."""
class Wrapper(kls, ResultWrapper):
"""Wrapper of a kls that can store render_result."""
def __init__(self, *args: Any, render_result: str | None = None) -> None:
super().__init__(*args)
self.render_result = render_result
def __str__(self) -> str:
if self.render_result is None:
# Can't get set repr to work
if kls is set:
return str(set(self))
return cast(str, kls.__str__(self))
return self.render_result
return Wrapper
class TupleWrapper(tuple, ResultWrapper):
"""Wrap a tuple."""
# This is all magic to be allowed to subclass a tuple.
def __new__(cls, value: tuple, *, render_result: str | None = None) -> TupleWrapper:
"""Create a new tuple class."""
return super().__new__(cls, tuple(value))
# pylint: disable=super-init-not-called
def __init__(self, value: tuple, *, render_result: str | None = None) -> None:
"""Initialize a new tuple class."""
self.render_result = render_result
def __str__(self) -> str:
"""Return string representation."""
if self.render_result is None:
return super().__str__()
return self.render_result
RESULT_WRAPPERS: dict[type, type] = {
kls: gen_result_wrapper(kls) # type: ignore[no-untyped-call]
for kls in (list, dict, set)
}
RESULT_WRAPPERS[tuple] = TupleWrapper
def _true(arg: str) -> bool:
return True
def _false(arg: str) -> bool:
return False
class RenderInfo:
"""Holds information about a template render."""
def __init__(self, template: Template) -> None:
"""Initialise."""
self.template = template
# Will be set sensibly once frozen.
self.filter_lifecycle: Callable[[str], bool] = _true
self.filter: Callable[[str], bool] = _true
self._result: str | None = None
self.is_static = False
self.exception: TemplateError | None = None
self.all_states = False
self.all_states_lifecycle = False
self.domains: collections.abc.Set[str] = set()
self.domains_lifecycle: collections.abc.Set[str] = set()
self.entities: collections.abc.Set[str] = set()
self.rate_limit: timedelta | None = None
self.has_time = False
def __repr__(self) -> str:
"""Representation of RenderInfo."""
return f"<RenderInfo {self.template} all_states={self.all_states} all_states_lifecycle={self.all_states_lifecycle} domains={self.domains} domains_lifecycle={self.domains_lifecycle} entities={self.entities} rate_limit={self.rate_limit}> has_time={self.has_time}"
def _filter_domains_and_entities(self, entity_id: str) -> bool:
"""Template should re-render if the entity state changes when we match specific domains or entities."""
return (
split_entity_id(entity_id)[0] in self.domains or entity_id in self.entities
)
def _filter_entities(self, entity_id: str) -> bool:
"""Template should re-render if the entity state changes when we match specific entities."""
return entity_id in self.entities
def _filter_lifecycle_domains(self, entity_id: str) -> bool:
"""Template should re-render if the entity is added or removed with domains watched."""
return split_entity_id(entity_id)[0] in self.domains_lifecycle
def result(self) -> str:
"""Results of the template computation."""
if self.exception is not None:
raise self.exception
return cast(str, self._result)
def _freeze_static(self) -> None:
self.is_static = True
self._freeze_sets()
self.all_states = False
def _freeze_sets(self) -> None:
self.entities = frozenset(self.entities)
self.domains = frozenset(self.domains)
self.domains_lifecycle = frozenset(self.domains_lifecycle)
def _freeze(self) -> None:
self._freeze_sets()
if self.rate_limit is None:
if self.all_states or self.exception:
self.rate_limit = ALL_STATES_RATE_LIMIT
elif self.domains or self.domains_lifecycle:
self.rate_limit = DOMAIN_STATES_RATE_LIMIT
if self.exception:
return
if not self.all_states_lifecycle:
if self.domains_lifecycle:
self.filter_lifecycle = self._filter_lifecycle_domains
else:
self.filter_lifecycle = _false
if self.all_states:
return
if self.domains:
self.filter = self._filter_domains_and_entities
elif self.entities:
self.filter = self._filter_entities
else:
self.filter = _false
class Template:
"""Class to hold a template and manage caching and rendering."""
__slots__ = (
"__weakref__",
"template",
"hass",
"is_static",
"_compiled_code",
"_compiled",
"_exc_info",
"_limited",
"_strict",
)
def __init__(self, template, hass=None):
"""Instantiate a template."""
if not isinstance(template, str):
raise TypeError("Expected template to be a string")
self.template: str = template.strip()
self._compiled_code = None
self._compiled: jinja2.Template | None = None
self.hass = hass
self.is_static = not is_template_string(template)
self._exc_info = None
self._limited = None
self._strict = None
@property
def _env(self) -> TemplateEnvironment:
if self.hass is None:
return _NO_HASS_ENV
if self._limited:
wanted_env = _ENVIRONMENT_LIMITED
elif self._strict:
wanted_env = _ENVIRONMENT_STRICT
else:
wanted_env = _ENVIRONMENT
ret: TemplateEnvironment | None = self.hass.data.get(wanted_env)
if ret is None:
ret = self.hass.data[wanted_env] = TemplateEnvironment(self.hass, self._limited, self._strict) # type: ignore[no-untyped-call]
return ret
def ensure_valid(self) -> None:
"""Return if template is valid."""
if self.is_static or self._compiled_code is not None:
return
try:
self._compiled_code = self._env.compile(self.template) # type: ignore[no-untyped-call]
except jinja2.TemplateError as err:
raise TemplateError(err) from err
def render(
self,
variables: TemplateVarsType = None,
parse_result: bool = True,
limited: bool = False,
**kwargs: Any,
) -> Any:
"""Render given template.
If limited is True, the template is not allowed to access any function or filter depending on hass or the state machine.
"""
if self.is_static:
if not parse_result or self.hass.config.legacy_templates:
return self.template
return self._parse_result(self.template)
return run_callback_threadsafe(
self.hass.loop,
partial(self.async_render, variables, parse_result, limited, **kwargs),
).result()
@callback
def async_render(
self,
variables: TemplateVarsType = None,
parse_result: bool = True,
limited: bool = False,
strict: bool = False,
**kwargs: Any,
) -> Any:
"""Render given template.
This method must be run in the event loop.
If limited is True, the template is not allowed to access any function or filter depending on hass or the state machine.
"""
if self.is_static:
if not parse_result or self.hass.config.legacy_templates:
return self.template
return self._parse_result(self.template)
compiled = self._compiled or self._ensure_compiled(limited, strict)
if variables is not None:
kwargs.update(variables)
try:
render_result = _render_with_context(self.template, compiled, **kwargs)
except Exception as err:
raise TemplateError(err) from err
render_result = render_result.strip()
if self.hass.config.legacy_templates or not parse_result:
return render_result
return self._parse_result(render_result)
def _parse_result(self, render_result: str) -> Any: # pylint: disable=no-self-use
"""Parse the result."""
try:
result = literal_eval(render_result)
if type(result) in RESULT_WRAPPERS:
result = RESULT_WRAPPERS[type(result)](
result, render_result=render_result
)
# If the literal_eval result is a string, use the original
# render, by not returning right here. The evaluation of strings
# resulting in strings impacts quotes, to avoid unexpected
# output; use the original render instead of the evaluated one.
# Complex and scientific values are also unexpected. Filter them out.
if (
# Filter out string and complex numbers
not isinstance(result, (str, complex))
and (
# Pass if not numeric and not a boolean
not isinstance(result, (int, float))
# Or it's a boolean (inherit from int)
or isinstance(result, bool)
# Or if it's a digit
or _IS_NUMERIC.match(render_result) is not None
)
):
return result
except (ValueError, TypeError, SyntaxError, MemoryError):
pass
return render_result
async def async_render_will_timeout(
self,
timeout: float,
variables: TemplateVarsType = None,
strict: bool = False,
**kwargs: Any,
) -> bool:
"""Check to see if rendering a template will timeout during render.
This is intended to check for expensive templates
that will make the system unstable. The template
is rendered in the executor to ensure it does not
tie up the event loop.
This function is not a security control and is only
intended to be used as a safety check when testing
templates.
This method must be run in the event loop.
"""
if self.is_static:
return False
compiled = self._compiled or self._ensure_compiled(strict=strict)
if variables is not None:
kwargs.update(variables)
self._exc_info = None
finish_event = asyncio.Event()
def _render_template() -> None:
try:
_render_with_context(self.template, compiled, **kwargs)
except TimeoutError:
pass
except Exception: # pylint: disable=broad-except
self._exc_info = sys.exc_info()
finally:
run_callback_threadsafe(self.hass.loop, finish_event.set)
try:
template_render_thread = ThreadWithException(target=_render_template)
template_render_thread.start()
await asyncio.wait_for(finish_event.wait(), timeout=timeout)
if self._exc_info:
raise TemplateError(self._exc_info[1].with_traceback(self._exc_info[2]))
except asyncio.TimeoutError:
template_render_thread.raise_exc(TimeoutError)
return True
finally:
template_render_thread.join()
return False
@callback
def async_render_to_info(
self, variables: TemplateVarsType = None, strict: bool = False, **kwargs: Any
) -> RenderInfo:
"""Render the template and collect an entity filter."""
assert self.hass and _RENDER_INFO not in self.hass.data
render_info = RenderInfo(self)
# pylint: disable=protected-access
if self.is_static:
render_info._result = self.template.strip()
render_info._freeze_static()
return render_info
self.hass.data[_RENDER_INFO] = render_info
try:
render_info._result = self.async_render(variables, strict=strict, **kwargs)
except TemplateError as ex:
render_info.exception = ex
finally:
del self.hass.data[_RENDER_INFO]
render_info._freeze()
return render_info
def render_with_possible_json_value(self, value, error_value=_SENTINEL):
"""Render template with value exposed.
If valid JSON will expose value_json too.
"""
if self.is_static:
return self.template
return run_callback_threadsafe(
self.hass.loop,
self.async_render_with_possible_json_value,
value,
error_value,
).result()
@callback
def async_render_with_possible_json_value(
self, value, error_value=_SENTINEL, variables=None
):
"""Render template with value exposed.
If valid JSON will expose value_json too.
This method must be run in the event loop.
"""
if self.is_static:
return self.template
if self._compiled is None:
self._ensure_compiled()
variables = dict(variables or {})
variables["value"] = value
with suppress(ValueError, TypeError):
variables["value_json"] = json.loads(value)
try:
return _render_with_context(
self.template, self._compiled, **variables
).strip()
except jinja2.TemplateError as ex:
if error_value is _SENTINEL:
_LOGGER.error(
"Error parsing value: %s (value: %s, template: %s)",
ex,
value,
self.template,
)
return value if error_value is _SENTINEL else error_value
def _ensure_compiled(
self, limited: bool = False, strict: bool = False
) -> jinja2.Template:
"""Bind a template to a specific hass instance."""
self.ensure_valid()
assert self.hass is not None, "hass variable not set on template"
assert (
self._limited is None or self._limited == limited
), "can't change between limited and non limited template"
assert (
self._strict is None or self._strict == strict
), "can't change between strict and non strict template"
assert not (strict and limited), "can't combine strict and limited template"
self._limited = limited
self._strict = strict
env = self._env
self._compiled = jinja2.Template.from_code(
env, self._compiled_code, env.globals, None
)
return self._compiled
def __eq__(self, other):
"""Compare template with another."""
return (
self.__class__ == other.__class__
and self.template == other.template
and self.hass == other.hass
)
def __hash__(self) -> int:
"""Hash code for template."""
return hash(self.template)
def __repr__(self) -> str:
"""Representation of Template."""
return 'Template("' + self.template + '")'
class AllStates:
"""Class to expose all HA states as attributes."""
def __init__(self, hass: HomeAssistant) -> None:
"""Initialize all states."""
self._hass = hass
def __getattr__(self, name):
"""Return the domain state."""
if "." in name:
return _get_state_if_valid(self._hass, name)
if name in _RESERVED_NAMES:
return None
if not valid_entity_id(f"{name}.entity"):
raise TemplateError(f"Invalid domain name '{name}'")
return DomainStates(self._hass, name)
# Jinja will try __getitem__ first and it avoids the need
# to call is_safe_attribute
__getitem__ = __getattr__
def _collect_all(self) -> None:
render_info = self._hass.data.get(_RENDER_INFO)
if render_info is not None:
render_info.all_states = True
def _collect_all_lifecycle(self) -> None:
render_info = self._hass.data.get(_RENDER_INFO)
if render_info is not None:
render_info.all_states_lifecycle = True
def __iter__(self):
"""Return all states."""
self._collect_all()
return _state_generator(self._hass, None)
def __len__(self) -> int:
"""Return number of states."""
self._collect_all_lifecycle()
return self._hass.states.async_entity_ids_count()
def __call__(self, entity_id):
"""Return the states."""
state = _get_state(self._hass, entity_id)
return STATE_UNKNOWN if state is None else state.state
def __repr__(self) -> str:
"""Representation of All States."""
return "<template AllStates>"
class DomainStates:
"""Class to expose a specific HA domain as attributes."""
def __init__(self, hass: HomeAssistant, domain: str) -> None:
"""Initialize the domain states."""
self._hass = hass
self._domain = domain
def __getattr__(self, name):
"""Return the states."""
return _get_state_if_valid(self._hass, f"{self._domain}.{name}")
# Jinja will try __getitem__ first and it avoids the need
# to call is_safe_attribute
__getitem__ = __getattr__
def _collect_domain(self) -> None:
entity_collect = self._hass.data.get(_RENDER_INFO)
if entity_collect is not None:
entity_collect.domains.add(self._domain)
def _collect_domain_lifecycle(self) -> None:
entity_collect = self._hass.data.get(_RENDER_INFO)
if entity_collect is not None:
entity_collect.domains_lifecycle.add(self._domain)
def __iter__(self):
"""Return the iteration over all the states."""
self._collect_domain()
return _state_generator(self._hass, self._domain)
def __len__(self) -> int:
"""Return number of states."""
self._collect_domain_lifecycle()
return self._hass.states.async_entity_ids_count(self._domain)
def __repr__(self) -> str:
"""Representation of Domain States."""
return f"<template DomainStates('{self._domain}')>"
class TemplateState(State):
"""Class to represent a state object in a template."""
__slots__ = ("_hass", "_state", "_collect")
# Inheritance is done so functions that check against State keep working
# pylint: disable=super-init-not-called
def __init__(self, hass: HomeAssistant, state: State, collect: bool = True) -> None:
"""Initialize template state."""
self._hass = hass
self._state = state
self._collect = collect
def _collect_state(self) -> None:
if self._collect and _RENDER_INFO in self._hass.data:
self._hass.data[_RENDER_INFO].entities.add(self._state.entity_id)
# Jinja will try __getitem__ first and it avoids the need
# to call is_safe_attribute
def __getitem__(self, item):
"""Return a property as an attribute for jinja."""
if item in _COLLECTABLE_STATE_ATTRIBUTES:
# _collect_state inlined here for performance
if self._collect and _RENDER_INFO in self._hass.data:
self._hass.data[_RENDER_INFO].entities.add(self._state.entity_id)
return getattr(self._state, item)
if item == "entity_id":
return self._state.entity_id
if item == "state_with_unit":
return self.state_with_unit
raise KeyError
@property
def entity_id(self):
"""Wrap State.entity_id.
Intentionally does not collect state
"""
return self._state.entity_id
@property
def state(self):
"""Wrap State.state."""
self._collect_state()
return self._state.state
@property
def attributes(self):
"""Wrap State.attributes."""
self._collect_state()
return self._state.attributes
@property
def last_changed(self):
"""Wrap State.last_changed."""
self._collect_state()
return self._state.last_changed
@property
def last_updated(self):
"""Wrap State.last_updated."""
self._collect_state()
return self._state.last_updated
@property
def context(self):
"""Wrap State.context."""
self._collect_state()
return self._state.context
@property
def domain(self):
"""Wrap State.domain."""
self._collect_state()
return self._state.domain
@property
def object_id(self):
"""Wrap State.object_id."""
self._collect_state()
return self._state.object_id
@property
def name(self):
"""Wrap State.name."""
self._collect_state()
return self._state.name
@property
def state_with_unit(self) -> str:
"""Return the state concatenated with the unit if available."""
self._collect_state()
unit = self._state.attributes.get(ATTR_UNIT_OF_MEASUREMENT)
return f"{self._state.state} {unit}" if unit else self._state.state
def __eq__(self, other: Any) -> bool:
"""Ensure we collect on equality check."""
self._collect_state()
return self._state.__eq__(other)
def __repr__(self) -> str:
"""Representation of Template State."""
return f"<template TemplateState({self._state.__repr__()})>"
def _collect_state(hass: HomeAssistant, entity_id: str) -> None:
entity_collect = hass.data.get(_RENDER_INFO)
if entity_collect is not None:
entity_collect.entities.add(entity_id)
def _state_generator(hass: HomeAssistant, domain: str | None) -> Generator:
"""State generator for a domain or all states."""
for state in sorted(hass.states.async_all(domain), key=attrgetter("entity_id")):
yield TemplateState(hass, state, collect=False)
def _get_state_if_valid(hass: HomeAssistant, entity_id: str) -> TemplateState | None:
state = hass.states.get(entity_id)
if state is None and not valid_entity_id(entity_id):
raise TemplateError(f"Invalid entity ID '{entity_id}'") # type: ignore
return _get_template_state_from_state(hass, entity_id, state)
def _get_state(hass: HomeAssistant, entity_id: str) -> TemplateState | None:
return _get_template_state_from_state(hass, entity_id, hass.states.get(entity_id))
def _get_template_state_from_state(
hass: HomeAssistant, entity_id: str, state: State | None
) -> TemplateState | None:
if state is None:
# Only need to collect if none, if not none collect first actual
# access to the state properties in the state wrapper.
_collect_state(hass, entity_id)
return None
return TemplateState(hass, state)
def _resolve_state(
hass: HomeAssistant, entity_id_or_state: Any
) -> State | TemplateState | None:
"""Return state or entity_id if given."""
if isinstance(entity_id_or_state, State):
return entity_id_or_state
if isinstance(entity_id_or_state, str):
return _get_state(hass, entity_id_or_state)
return None
def result_as_boolean(template_result: str | None) -> bool:
"""Convert the template result to a boolean.
True/not 0/'1'/'true'/'yes'/'on'/'enable' are considered truthy
False/0/None/'0'/'false'/'no'/'off'/'disable' are considered falsy
"""
if template_result is None:
return False
try:
# Import here, not at top-level to avoid circular import
from homeassistant.helpers import ( # pylint: disable=import-outside-toplevel
config_validation as cv,
)
return cv.boolean(template_result)
except vol.Invalid:
return False
def expand(hass: HomeAssistant, *args: Any) -> Iterable[State]:
"""Expand out any groups into entity states."""
search = list(args)
found = {}
while search:
entity = search.pop()
if isinstance(entity, str):
entity_id = entity
entity = _get_state(hass, entity)
if entity is None:
continue
elif isinstance(entity, State):
entity_id = entity.entity_id
elif isinstance(entity, collections.abc.Iterable):
search += entity
continue
else:
# ignore other types
continue
if entity_id.startswith(_GROUP_DOMAIN_PREFIX):
# Collect state will be called in here since it's wrapped
group_entities = entity.attributes.get(ATTR_ENTITY_ID)
if group_entities:
search += group_entities
else:
_collect_state(hass, entity_id)
found[entity_id] = entity
return sorted(found.values(), key=lambda a: a.entity_id)
def device_entities(hass: HomeAssistant, _device_id: str) -> Iterable[str]:
"""Get entity ids for entities tied to a device."""
entity_reg = entity_registry.async_get(hass)
entries = entity_registry.async_entries_for_device(entity_reg, _device_id)
return [entry.entity_id for entry in entries]
def device_id(hass: HomeAssistant, entity_id: str) -> str | None:
"""Get a device ID from an entity ID."""
if not isinstance(entity_id, str) or "." not in entity_id:
raise TemplateError(f"Must provide an entity ID, got {entity_id}") # type: ignore
entity_reg = entity_registry.async_get(hass)
entity = entity_reg.async_get(entity_id)
if entity is None:
return None
return entity.device_id
def device_attr(hass: HomeAssistant, device_or_entity_id: str, attr_name: str) -> Any:
"""Get the device specific attribute."""
device_reg = device_registry.async_get(hass)
if not isinstance(device_or_entity_id, str):
raise TemplateError("Must provide a device or entity ID")
device = None
if (
"." in device_or_entity_id
and (_device_id := device_id(hass, device_or_entity_id)) is not None
):
device = device_reg.async_get(_device_id)
elif "." not in device_or_entity_id:
device = device_reg.async_get(device_or_entity_id)
if device is None or not hasattr(device, attr_name):
return None
return getattr(device, attr_name)
def is_device_attr(
hass: HomeAssistant, device_or_entity_id: str, attr_name: str, attr_value: Any
) -> bool:
"""Test if a device's attribute is a specific value."""
return bool(device_attr(hass, device_or_entity_id, attr_name) == attr_value)
def area_id(hass: HomeAssistant, lookup_value: str) -> str | None:
"""Get the area ID from an area name, device id, or entity id."""
area_reg = area_registry.async_get(hass)
if area := area_reg.async_get_area_by_name(str(lookup_value)):
return area.id
ent_reg = entity_registry.async_get(hass)
dev_reg = device_registry.async_get(hass)
# Import here, not at top-level to avoid circular import
from homeassistant.helpers import ( # pylint: disable=import-outside-toplevel
config_validation as cv,
)
try:
cv.entity_id(lookup_value)
except vol.Invalid:
pass
else:
if entity := ent_reg.async_get(lookup_value):
# If entity has an area ID, return that
if entity.area_id:
return entity.area_id
# If entity has a device ID, return the area ID for the device
if entity.device_id and (device := dev_reg.async_get(entity.device_id)):
return device.area_id
# Check if this could be a device ID
if device := dev_reg.async_get(lookup_value):
return device.area_id
return None
def _get_area_name(area_reg: area_registry.AreaRegistry, valid_area_id: str) -> str:
"""Get area name from valid area ID."""
area = area_reg.async_get_area(valid_area_id)
assert area
return area.name
def area_name(hass: HomeAssistant, lookup_value: str) -> str | None:
"""Get the area name from an area id, device id, or entity id."""
area_reg = area_registry.async_get(hass)
area = area_reg.async_get_area(lookup_value)
if area:
return area.name
dev_reg = device_registry.async_get(hass)
ent_reg = entity_registry.async_get(hass)
# Import here, not at top-level to avoid circular import
from homeassistant.helpers import ( # pylint: disable=import-outside-toplevel
config_validation as cv,
)
try:
cv.entity_id(lookup_value)
except vol.Invalid:
pass
else:
if entity := ent_reg.async_get(lookup_value):
# If entity has an area ID, get the area name for that
if entity.area_id:
return _get_area_name(area_reg, entity.area_id)
# If entity has a device ID and the device exists with an area ID, get the
# area name for that
if (
entity.device_id
and (device := dev_reg.async_get(entity.device_id))
and device.area_id
):
return _get_area_name(area_reg, device.area_id)
if (device := dev_reg.async_get(lookup_value)) and device.area_id:
return _get_area_name(area_reg, device.area_id)
return None
def closest(hass, *args):
"""Find closest entity.
Closest to home:
closest(states)
closest(states.device_tracker)
closest('group.children')
closest(states.group.children)
Closest to a point:
closest(23.456, 23.456, 'group.children')
closest('zone.school', 'group.children')
closest(states.zone.school, 'group.children')
As a filter:
states | closest
states.device_tracker | closest
['group.children', states.device_tracker] | closest
'group.children' | closest(23.456, 23.456)
states.device_tracker | closest('zone.school')
'group.children' | closest(states.zone.school)
"""
if len(args) == 1:
latitude = hass.config.latitude
longitude = hass.config.longitude
entities = args[0]
elif len(args) == 2:
point_state = _resolve_state(hass, args[0])
if point_state is None:
_LOGGER.warning("Closest:Unable to find state %s", args[0])
return None
if not loc_helper.has_location(point_state):
_LOGGER.warning(
"Closest:State does not contain valid location: %s", point_state
)
return None
latitude = point_state.attributes.get(ATTR_LATITUDE)
longitude = point_state.attributes.get(ATTR_LONGITUDE)
entities = args[1]
else:
latitude = convert(args[0], float)
longitude = convert(args[1], float)
if latitude is None or longitude is None:
_LOGGER.warning(
"Closest:Received invalid coordinates: %s, %s", args[0], args[1]
)
return None
entities = args[2]
states = expand(hass, entities)
# state will already be wrapped here
return loc_helper.closest(latitude, longitude, states)
def closest_filter(hass, *args):
"""Call closest as a filter. Need to reorder arguments."""
new_args = list(args[1:])
new_args.append(args[0])
return closest(hass, *new_args)
def distance(hass, *args):
"""Calculate distance.
Will calculate distance from home to a point or between points.
Points can be passed in using state objects or lat/lng coordinates.
"""
locations = []
to_process = list(args)
while to_process:
value = to_process.pop(0)
if isinstance(value, str) and not valid_entity_id(value):
point_state = None
else:
point_state = _resolve_state(hass, value)
if point_state is None:
# We expect this and next value to be lat&lng
if not to_process:
_LOGGER.warning(
"Distance:Expected latitude and longitude, got %s", value
)
return None
value_2 = to_process.pop(0)
latitude = convert(value, float)
longitude = convert(value_2, float)
if latitude is None or longitude is None:
_LOGGER.warning(
"Distance:Unable to process latitude and longitude: %s, %s",
value,
value_2,
)
return None
else:
if not loc_helper.has_location(point_state):
_LOGGER.warning(
"Distance:State does not contain valid location: %s", point_state
)
return None
latitude = point_state.attributes.get(ATTR_LATITUDE)
longitude = point_state.attributes.get(ATTR_LONGITUDE)
locations.append((latitude, longitude))
if len(locations) == 1:
return hass.config.distance(*locations[0])
return hass.config.units.length(
loc_util.distance(*locations[0] + locations[1]), LENGTH_METERS
)
def is_state(hass: HomeAssistant, entity_id: str, state: State) -> bool:
"""Test if a state is a specific value."""
state_obj = _get_state(hass, entity_id)
return state_obj is not None and state_obj.state == state
def is_state_attr(hass: HomeAssistant, entity_id: str, name: str, value: Any) -> bool:
"""Test if a state's attribute is a specific value."""
attr = state_attr(hass, entity_id, name)
return attr is not None and attr == value
def state_attr(hass: HomeAssistant, entity_id: str, name: str) -> Any:
"""Get a specific attribute from a state."""
state_obj = _get_state(hass, entity_id)
if state_obj is not None:
return state_obj.attributes.get(name)
return None
def now(hass: HomeAssistant) -> datetime:
"""Record fetching now."""
render_info = hass.data.get(_RENDER_INFO)
if render_info is not None:
render_info.has_time = True
return dt_util.now()
def utcnow(hass: HomeAssistant) -> datetime:
"""Record fetching utcnow."""
render_info = hass.data.get(_RENDER_INFO)
if render_info is not None:
render_info.has_time = True
return dt_util.utcnow()
def forgiving_round(value, precision=0, method="common"):
"""Round accepted strings."""
try:
# support rounding methods like jinja
multiplier = float(10 ** precision)
if method == "ceil":
value = math.ceil(float(value) * multiplier) / multiplier
elif method == "floor":
value = math.floor(float(value) * multiplier) / multiplier
elif method == "half":
value = round(float(value) * 2) / 2
else:
# if method is common or something else, use common rounding
value = round(float(value), precision)
return int(value) if precision == 0 else value
except (ValueError, TypeError):
# If value can't be converted to float
return value
def multiply(value, amount):
"""Filter to convert value to float and multiply it."""
try:
return float(value) * amount
except (ValueError, TypeError):
# If value can't be converted to float
return value
def logarithm(value, base=math.e):
"""Filter to get logarithm of the value with a specific base."""
try:
return math.log(float(value), float(base))
except (ValueError, TypeError):
return value
def sine(value):
"""Filter to get sine of the value."""
try:
return math.sin(float(value))
except (ValueError, TypeError):
return value
def cosine(value):
"""Filter to get cosine of the value."""
try:
return math.cos(float(value))
except (ValueError, TypeError):
return value
def tangent(value):
"""Filter to get tangent of the value."""
try:
return math.tan(float(value))
except (ValueError, TypeError):
return value
def arc_sine(value):
"""Filter to get arc sine of the value."""
try:
return math.asin(float(value))
except (ValueError, TypeError):
return value
def arc_cosine(value):
"""Filter to get arc cosine of the value."""
try:
return math.acos(float(value))
except (ValueError, TypeError):
return value
def arc_tangent(value):
"""Filter to get arc tangent of the value."""
try:
return math.atan(float(value))
except (ValueError, TypeError):
return value
def arc_tangent2(*args):
"""Filter to calculate four quadrant arc tangent of y / x."""
try:
if len(args) == 1 and isinstance(args[0], (list, tuple)):
args = args[0]
return math.atan2(float(args[0]), float(args[1]))
except (ValueError, TypeError):
return args
def square_root(value):
"""Filter to get square root of the value."""
try:
return math.sqrt(float(value))
except (ValueError, TypeError):
return value
def timestamp_custom(value, date_format=DATE_STR_FORMAT, local=True):
"""Filter to convert given timestamp to format."""
try:
date = dt_util.utc_from_timestamp(value)
if local:
date = dt_util.as_local(date)
return date.strftime(date_format)
except (ValueError, TypeError):
# If timestamp can't be converted
return value
def timestamp_local(value):
"""Filter to convert given timestamp to local date/time."""
try:
return dt_util.as_local(dt_util.utc_from_timestamp(value)).strftime(
DATE_STR_FORMAT
)
except (ValueError, TypeError):
# If timestamp can't be converted
return value
def timestamp_utc(value):
"""Filter to convert given timestamp to UTC date/time."""
try:
return dt_util.utc_from_timestamp(value).strftime(DATE_STR_FORMAT)
except (ValueError, TypeError):
# If timestamp can't be converted
return value
def forgiving_as_timestamp(value):
"""Try to convert value to timestamp."""
try:
return dt_util.as_timestamp(value)
except (ValueError, TypeError):
return None
def strptime(string, fmt):
"""Parse a time string to datetime."""
try:
return datetime.strptime(string, fmt)
except (ValueError, AttributeError, TypeError):
return string
def fail_when_undefined(value):
"""Filter to force a failure when the value is undefined."""
if isinstance(value, jinja2.Undefined):
value()
return value
def forgiving_float(value):
"""Try to convert value to a float."""
try:
return float(value)
except (ValueError, TypeError):
return value
def regex_match(value, find="", ignorecase=False):
"""Match value using regex."""
if not isinstance(value, str):
value = str(value)
flags = re.I if ignorecase else 0
return bool(re.match(find, value, flags))
def regex_replace(value="", find="", replace="", ignorecase=False):
"""Replace using regex."""
if not isinstance(value, str):
value = str(value)
flags = re.I if ignorecase else 0
regex = re.compile(find, flags)
return regex.sub(replace, value)
def regex_search(value, find="", ignorecase=False):
"""Search using regex."""
if not isinstance(value, str):
value = str(value)
flags = re.I if ignorecase else 0
return bool(re.search(find, value, flags))
def regex_findall_index(value, find="", index=0, ignorecase=False):
"""Find all matches using regex and then pick specific match index."""
if not isinstance(value, str):
value = str(value)
flags = re.I if ignorecase else 0
return re.findall(find, value, flags)[index]
def bitwise_and(first_value, second_value):
"""Perform a bitwise and operation."""
return first_value & second_value
def bitwise_or(first_value, second_value):
"""Perform a bitwise or operation."""
return first_value | second_value
def base64_encode(value):
"""Perform base64 encode."""
return base64.b64encode(value.encode("utf-8")).decode("utf-8")
def base64_decode(value):
"""Perform base64 denode."""
return base64.b64decode(value).decode("utf-8")
def ordinal(value):
"""Perform ordinal conversion."""
return str(value) + (
list(["th", "st", "nd", "rd"] + ["th"] * 6)[(int(str(value)[-1])) % 10]
if int(str(value)[-2:]) % 100 not in range(11, 14)
else "th"
)
def from_json(value):
"""Convert a JSON string to an object."""
return json.loads(value)
def to_json(value):
"""Convert an object to a JSON string."""
return json.dumps(value)
@pass_context
def random_every_time(context, values):
"""Choose a random value.
Unlike Jinja's random filter,
this is context-dependent to avoid caching the chosen value.
"""
return random.choice(values)
def relative_time(value):
"""
Take a datetime and return its "age" as a string.
The age can be in second, minute, hour, day, month or year. Only the
biggest unit is considered, e.g. if it's 2 days and 3 hours, "2 days" will
be returned.
Make sure date is not in the future, or else it will return None.
If the input are not a datetime object the input will be returned unmodified.
"""
if not isinstance(value, datetime):
return value
if not value.tzinfo:
value = dt_util.as_local(value)
if dt_util.now() < value:
return value
return dt_util.get_age(value)
def urlencode(value):
"""Urlencode dictionary and return as UTF-8 string."""
return urllib_urlencode(value).encode("utf-8")
def _render_with_context(
template_str: str, template: jinja2.Template, **kwargs: Any
) -> str:
"""Store template being rendered in a ContextVar to aid error handling."""
template_cv.set(template_str)
return template.render(**kwargs)
class LoggingUndefined(jinja2.Undefined):
"""Log on undefined variables."""
def _log_message(self):
template = template_cv.get() or ""
_LOGGER.warning(
"Template variable warning: %s when rendering '%s'",
self._undefined_message,
template,
)
def _fail_with_undefined_error(self, *args, **kwargs):
try:
return super()._fail_with_undefined_error(*args, **kwargs)
except self._undefined_exception as ex:
template = template_cv.get() or ""
_LOGGER.error(
"Template variable error: %s when rendering '%s'",
self._undefined_message,
template,
)
raise ex
def __str__(self):
"""Log undefined __str___."""
self._log_message()
return super().__str__()
def __iter__(self):
"""Log undefined __iter___."""
self._log_message()
return super().__iter__()
def __bool__(self):
"""Log undefined __bool___."""
self._log_message()
return super().__bool__()
class TemplateEnvironment(ImmutableSandboxedEnvironment):
"""The Home Assistant template environment."""
def __init__(self, hass, limited=False, strict=False):
"""Initialise template environment."""
if not strict:
undefined = LoggingUndefined
else:
undefined = jinja2.StrictUndefined
super().__init__(undefined=undefined)
self.hass = hass
self.template_cache = weakref.WeakValueDictionary()
self.filters["round"] = forgiving_round
self.filters["multiply"] = multiply
self.filters["log"] = logarithm
self.filters["sin"] = sine
self.filters["cos"] = cosine
self.filters["tan"] = tangent
self.filters["asin"] = arc_sine
self.filters["acos"] = arc_cosine
self.filters["atan"] = arc_tangent
self.filters["atan2"] = arc_tangent2
self.filters["sqrt"] = square_root
self.filters["as_datetime"] = dt_util.parse_datetime
self.filters["as_timestamp"] = forgiving_as_timestamp
self.filters["as_local"] = dt_util.as_local
self.filters["timestamp_custom"] = timestamp_custom
self.filters["timestamp_local"] = timestamp_local
self.filters["timestamp_utc"] = timestamp_utc
self.filters["to_json"] = to_json
self.filters["from_json"] = from_json
self.filters["is_defined"] = fail_when_undefined
self.filters["max"] = max
self.filters["min"] = min
self.filters["random"] = random_every_time
self.filters["base64_encode"] = base64_encode
self.filters["base64_decode"] = base64_decode
self.filters["ordinal"] = ordinal
self.filters["regex_match"] = regex_match
self.filters["regex_replace"] = regex_replace
self.filters["regex_search"] = regex_search
self.filters["regex_findall_index"] = regex_findall_index
self.filters["bitwise_and"] = bitwise_and
self.filters["bitwise_or"] = bitwise_or
self.filters["ord"] = ord
self.globals["log"] = logarithm
self.globals["sin"] = sine
self.globals["cos"] = cosine
self.globals["tan"] = tangent
self.globals["sqrt"] = square_root
self.globals["pi"] = math.pi
self.globals["tau"] = math.pi * 2
self.globals["e"] = math.e
self.globals["asin"] = arc_sine
self.globals["acos"] = arc_cosine
self.globals["atan"] = arc_tangent
self.globals["atan2"] = arc_tangent2
self.globals["float"] = forgiving_float
self.globals["as_datetime"] = dt_util.parse_datetime
self.globals["as_local"] = dt_util.as_local
self.globals["as_timestamp"] = forgiving_as_timestamp
self.globals["relative_time"] = relative_time
self.globals["timedelta"] = timedelta
self.globals["strptime"] = strptime
self.globals["urlencode"] = urlencode
self.globals["max"] = max
self.globals["min"] = min
self.tests["match"] = regex_match
self.tests["search"] = regex_search
if hass is None:
return
# We mark these as a context functions to ensure they get
# evaluated fresh with every execution, rather than executed
# at compile time and the value stored. The context itself
# can be discarded, we only need to get at the hass object.
def hassfunction(func):
"""Wrap function that depend on hass."""
@wraps(func)
def wrapper(*args, **kwargs):
return func(hass, *args[1:], **kwargs)
return pass_context(wrapper)
self.globals["device_entities"] = hassfunction(device_entities)
self.filters["device_entities"] = pass_context(self.globals["device_entities"])
self.globals["device_attr"] = hassfunction(device_attr)
self.globals["is_device_attr"] = hassfunction(is_device_attr)
self.globals["device_id"] = hassfunction(device_id)
self.filters["device_id"] = pass_context(self.globals["device_id"])
self.globals["area_id"] = hassfunction(area_id)
self.filters["area_id"] = pass_context(self.globals["area_id"])
self.globals["area_name"] = hassfunction(area_name)
self.filters["area_name"] = pass_context(self.globals["area_name"])
if limited:
# Only device_entities is available to limited templates, mark other
# functions and filters as unsupported.
def unsupported(name):
def warn_unsupported(*args, **kwargs):
raise TemplateError(
f"Use of '{name}' is not supported in limited templates"
)
return warn_unsupported
hass_globals = [
"closest",
"distance",
"expand",
"is_state",
"is_state_attr",
"state_attr",
"states",
"utcnow",
"now",
"device_attr",
"is_device_attr",
"device_id",
"area_id",
"area_name",
]
hass_filters = ["closest", "expand", "device_id", "area_id", "area_name"]
for glob in hass_globals:
self.globals[glob] = unsupported(glob)
for filt in hass_filters:
self.filters[filt] = unsupported(filt)
return
self.globals["expand"] = hassfunction(expand)
self.filters["expand"] = pass_context(self.globals["expand"])
self.globals["closest"] = hassfunction(closest)
self.filters["closest"] = pass_context(hassfunction(closest_filter))
self.globals["distance"] = hassfunction(distance)
self.globals["is_state"] = hassfunction(is_state)
self.globals["is_state_attr"] = hassfunction(is_state_attr)
self.globals["state_attr"] = hassfunction(state_attr)
self.globals["states"] = AllStates(hass)
self.globals["utcnow"] = hassfunction(utcnow)
self.globals["now"] = hassfunction(now)
def is_safe_callable(self, obj):
"""Test if callback is safe."""
return isinstance(obj, AllStates) or super().is_safe_callable(obj)
def is_safe_attribute(self, obj, attr, value):
"""Test if attribute is safe."""
if isinstance(obj, (AllStates, DomainStates, TemplateState)):
return attr[0] != "_"
if isinstance(obj, Namespace):
return True
return super().is_safe_attribute(obj, attr, value)
def compile(self, source, name=None, filename=None, raw=False, defer_init=False):
"""Compile the template."""
if (
name is not None
or filename is not None
or raw is not False
or defer_init is not False
):
# If there are any non-default keywords args, we do
# not cache. In prodution we currently do not have
# any instance of this.
return super().compile(source, name, filename, raw, defer_init)
cached = self.template_cache.get(source)
if cached is None:
cached = self.template_cache[source] = super().compile(source)
return cached
_NO_HASS_ENV = TemplateEnvironment(None) # type: ignore[no-untyped-call]