esphome/esphome/final_validate.py
2022-10-05 20:09:27 +13:00

59 lines
1.9 KiB
Python

from abc import ABC, abstractmethod
from typing import Any
import contextvars
from esphome.types import ConfigFragmentType, ID, ConfigPathType
import esphome.config_validation as cv
class FinalValidateConfig(ABC):
@property
@abstractmethod
def data(self) -> dict[str, Any]:
"""A dictionary that can be used by post validation functions to store
global data during the validation phase. Each component should store its
data under a unique key
"""
@abstractmethod
def get_path_for_id(self, id: ID) -> ConfigPathType:
"""Get the config path a given ID has been declared in.
This is the location under the _validated_ config (for example, with cv.ensure_list applied)
Raises KeyError if the id was not declared in the configuration.
"""
@abstractmethod
def get_config_for_path(self, path: ConfigPathType) -> ConfigFragmentType:
"""Get the config fragment for the given global path.
Raises KeyError if a key in the path does not exist.
"""
FinalValidateConfig.register(dict)
# Context variable tracking the full config for some final validation functions.
full_config: contextvars.ContextVar[FinalValidateConfig] = contextvars.ContextVar(
"full_config"
)
def id_declaration_match_schema(schema):
"""A final-validation schema function that applies a schema to the outer config fragment of an
ID declaration.
This validator must be applied to ID values.
"""
if not isinstance(schema, cv.Schema):
schema = cv.Schema(schema, extra=cv.ALLOW_EXTRA)
def validator(value):
fconf = full_config.get()
path = fconf.get_path_for_id(value)[:-1]
declaration_config = fconf.get_config_for_path(path)
with cv.prepend_path([cv.ROOT_CONFIG_PATH] + path):
return schema(declaration_config)
return validator