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config_validator.py
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config_validator.py
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"""Config specs and validator."""
import logging
from functools import lru_cache
import re
from collections import namedtuple
from copy import deepcopy
from typing import Any
from typing import Dict
from mpf.core.config_spec_loader import ConfigSpecLoader
from mpf.core.rgb_color import NAMED_RGB_COLORS, RGBColor
from mpf.exceptions.config_file_error import ConfigFileError
from mpf.file_interfaces.yaml_interface import YamlInterface
from mpf.core.utility_functions import Util
MYPY = False
if MYPY: # pragma: no cover
from mpf.core.machine import MachineController # pylint: disable-msg=cyclic-import,unused-import
class RuntimeToken:
"""A runtime token."""
def __init__(self, token, validator_function):
"""Create a runtime token."""
self.token = token
self.validator_function = validator_function
def __repr__(self):
"""Return string representation."""
return "<RuntimeToken ({})>".format(self.token)
ValidationPath = namedtuple("ValidationPath", ["parent", "item"])
class ConfigValidator:
"""Validates config against config specs."""
__slots__ = ["machine", "config_spec", "log", "validator_list"]
def __init__(self, machine, config_spec):
"""Initialize validator."""
self.machine = machine # type: MachineController
self.log = logging.getLogger('ConfigValidator')
self.config_spec = config_spec
self.validator_list = {
"str": self._validate_type_str,
"event_posted": self._validate_type_str,
"event_handler": self._validate_type_str,
"lstr": self._validate_type_lstr,
"float": self._validate_type_float,
"float_or_token": self._validate_type_or_token(self._validate_type_float),
"template_float_or_token": self._validate_type_or_token(self._validate_type_template_float),
"int": self._validate_type_int,
"int_or_token": self._validate_type_or_token(self._validate_type_int),
"num": self._validate_type_num,
"num_or_token": self._validate_type_or_token(self._validate_type_num),
"bool": self._validate_type_bool,
"bool_or_token": self._validate_type_or_token(self._validate_type_bool),
"template_float": self._validate_type_template_float,
"template_int": self._validate_type_template_int,
"template_bool": self._validate_type_template_bool,
"template_secs": self._validate_type_template_secs,
"template_ms": self._validate_type_template_ms,
"template_str": self._validate_type_template_str,
"boolean": self._validate_type_bool,
"ms": self._validate_type_ms,
"ms_or_token": self._validate_type_or_token(self._validate_type_ms),
"secs": self._validate_type_secs,
"secs_or_token": self._validate_type_or_token(self._validate_type_secs),
"list": self._validate_type_list,
"int_from_hex": self._validate_type_int_from_hex,
"dict": self._validate_type_dict,
"kivycolor": self._validate_type_kivycolor,
"color": self._validate_type_color,
"color_or_token": self._validate_type_or_token(self._validate_type_color),
"bool_int": self._validate_type_bool_int,
"pow2": self._validate_type_pow2,
"gain": self._validate_type_gain,
"subconfig": self._validate_type_subconfig,
"enum": self._validate_type_enum,
"machine": self._validate_type_machine,
}
@staticmethod
def _validate_type_or_token(func):
def _validate_type_or_token_real(item, validation_failure_info, param=None):
if isinstance(item, str) and item.startswith("(") and item.endswith(")"):
return RuntimeToken(item[1:-1], func)
return func(item, validation_failure_info, param)
return _validate_type_or_token_real
def load_mode_config_spec(self, mode_string, config_spec):
"""Load config specs for a mode."""
if '_mode_settings' not in self.config_spec:
self.config_spec['_mode_settings'] = {}
if mode_string not in self.config_spec['_mode_settings']:
if isinstance(config_spec, dict):
self.config_spec['_mode_settings'][mode_string] = \
ConfigSpecLoader.process_config_spec(config_spec, mode_string)
else:
config = YamlInterface.process(config_spec)
self.config_spec['_mode_settings'][mode_string] = \
ConfigSpecLoader.process_config_spec(config, mode_string)
def get_config_spec(self):
"""Return config spec."""
return self.config_spec
@lru_cache(1024)
def build_spec(self, config_spec, base_spec):
"""Build config spec out of two or more specs."""
# build up the actual config spec we're going to use
spec_list = [config_spec]
if base_spec:
if isinstance(base_spec, tuple):
spec_list.extend(list(base_spec))
else:
spec_list.append(base_spec)
this_spec = dict()
for spec_element in spec_list:
this_base_spec = self.config_spec
spec_element = spec_element.split(':')
for spec in spec_element:
this_base_spec = this_base_spec[spec]
# need to deepcopy so the orig base spec doesn't get polluted
# with this widget's spec
this_base_spec = deepcopy(this_base_spec)
this_base_spec.update(this_spec)
this_spec = this_base_spec
return this_spec
# pylint: disable-msg=too-many-arguments,too-many-branches
def validate_config(self, config_spec, source, section_name=None,
base_spec=None, add_missing_keys=True, prefix=None) -> Dict[str, Any]:
"""Validate a config dict against spec.
Args:
----
config_spec (str): Path of the config specification
source: Dict to validate against config spec
section_name: Name of the section for debugging and error messages
base_spec: Base specifications to inherit for this config
add_missing_keys: If we should add missing keys while validating
prefix: Prefix for debugging and error messages
"""
if source is None:
source = dict()
validation_failure_info = ValidationPath(parent=None,
item=prefix + ":" + config_spec if prefix else config_spec)
validation_failure_info = ValidationPath(parent=validation_failure_info,
item=section_name if section_name else config_spec)
return self._validate_config(config_spec, source, base_spec=base_spec, add_missing_keys=add_missing_keys,
validation_failure_info=validation_failure_info)
# pylint: disable-msg=too-many-arguments,too-many-branches
def _validate_config(self, config_spec, source, base_spec=None, add_missing_keys=True,
validation_failure_info=None) -> Dict[str, Any]:
"""Validate a config dict against spec."""
# config_spec, str i.e. "device:shot"
# source is dict
# section_name is str used for logging failures
this_spec = self.build_spec(config_spec, base_spec)
if '__allow_others__' not in this_spec:
self.check_for_invalid_sections(this_spec, source, validation_failure_info)
processed_config = source
if not isinstance(source, dict):
raise self.validation_error(source, validation_failure_info,
"Config attribute should be dict but is {}".format(source.__class__))
for k in list(this_spec.keys()):
if this_spec[k] == 'ignore' or k[0] == '_':
continue
if k in source: # validate the entry that exists
if isinstance(this_spec[k], dict):
# This means we're looking for a list of dicts
final_list = list()
if k in source:
for i in source[k]: # individual step
final_list.append(self._validate_config(
config_spec + ':' + k, source=i,
validation_failure_info=ValidationPath(validation_failure_info, k)))
processed_config[k] = final_list
else:
processed_config[k] = self.validate_config_item(
this_spec[k], item=source[k],
validation_failure_info=ValidationPath(validation_failure_info, k))
elif add_missing_keys: # create the default entry
if isinstance(this_spec[k], dict):
processed_config[k] = list()
else:
processed_config[k] = self.validate_config_item(
this_spec[k],
validation_failure_info=ValidationPath(validation_failure_info, k))
return processed_config
def validate_config_item(self, spec, validation_failure_info,
item='item not in config!@#', ):
"""Validate a config item."""
try:
item_type, validation, default = spec
except (ValueError, AttributeError):
raise ValueError('Error in validator spec: {}:{}'.format(validation_failure_info, spec))
if default.lower() == 'none':
default = None
elif not default:
default = 'default required!@#'
if item == 'item not in config!@#':
if default == 'default required!@#':
section = self._build_error_path(validation_failure_info.parent)
raise self.validation_error(
"None", validation_failure_info,
f'Required setting "{validation_failure_info.item}:" is missing '
f'from section "{section}:" in your config.', 9)
item = default
if item_type == 'single':
return self.validate_item(item, validation, validation_failure_info)
if item_type == 'list':
if validation in ("event_posted", "event_handler"):
item_list = Util.string_to_list(item)
else:
item_list = Util.string_to_event_list(item)
new_list = list()
for i in item_list:
if i in ("", " "):
raise self.validation_error(item, validation_failure_info, "List contains an empty element.", 15)
new_list.append(self.validate_item(i, validation, validation_failure_info))
return new_list
if item_type == 'set':
item_set = set(Util.string_to_list(item))
new_set = set()
for i in item_set:
new_set.add(self.validate_item(i, validation, validation_failure_info))
return new_set
if item_type == "event_handler":
if validation != "event_handler:ms":
raise AssertionError("event_handler should use event_handler:ms in config_spec: {}".format(spec))
return self._validate_dict(item_type, validation, validation_failure_info, item)
if item_type == 'dict':
return self._validate_dict(item_type, validation, validation_failure_info, item)
raise ConfigFileError("Invalid Type '{}' in config spec {}".format(item_type,
self._build_error_path(validation_failure_info)), 1, self.log.name)
def _validate_dict(self, item_type, validation, validation_failure_info, item):
if ':' not in validation:
raise self.validation_error(item, validation_failure_info, "Missing : in dict validator.")
validators = validation.split(':')
if item_type == "dict":
item_dict = dict()
if item == "None" or item is None:
item = {}
if not isinstance(item, dict):
raise self.validation_error(item, validation_failure_info, "Item is not a dict.", 12)
elif item_type == "event_handler":
# item could be str, list, or list of dicts
item_dict = dict()
try:
item = Util.event_config_to_dict(item)
except TypeError:
raise self.validation_error(item, validation_failure_info, "Could not convert item to dict", 8)
else:
raise AssertionError("Invalid type {}".format(item_type))
for k, v in item.items():
item_dict[self.validate_item(k, validators[0], validation_failure_info)] = (
self.validate_item(v, validators[1], ValidationPath(validation_failure_info, k)))
return item_dict
def check_for_invalid_sections(self, spec, config, validation_failure_info):
"""Check if all attributes are defined in spec."""
# TODO: refactor this method
try:
for k in config:
if not isinstance(k, dict) and k not in spec and k[0] != '_':
path_list = validation_failure_info.parent.item.split(':')
if len(path_list) > 1 and path_list[-1] == validation_failure_info[1]:
path_list.append('[list_item]')
elif path_list[0] == validation_failure_info[1]:
path_list = list()
path_list.append(validation_failure_info[1])
path_list.append(k)
path_string = ':'.join(path_list)
if "mpf" in self.machine.config and self.machine.config['mpf']['allow_invalid_config_sections']:
self.log.warning('Unrecognized config setting. "%s" is '
'not a valid setting name.',
path_string)
else:
self.log.error('Your config contains a value for the '
'setting "%s", but this is not a valid '
'setting name.', path_string)
raise ConfigFileError('Your config contains a value for the '
'setting "' + path_string + '", but this is not a valid '
'setting name.', 2, self.log.name)
except TypeError:
raise ConfigFileError(
'Error in config. Your "{}:" section contains a value that is '
'not a parent with sub-settings: {}'.format(
validation_failure_info.parent.item, config), 3, self.log.name)
def _validate_type_subconfig(self, item, param, validation_failure_info):
if item is None:
return {}
try:
attribute, base_spec_str = param.split(",", 1)
base_spec = tuple(base_spec_str.split(","))
except ValueError:
base_spec = None
attribute = param
return self._validate_config(attribute, item, validation_failure_info=validation_failure_info,
base_spec=base_spec)
def _validate_type_enum(self, item, param, validation_failure_info):
enum_values = param.lower().split(",")
try:
item = item.lower()
except AttributeError:
pass
if item is None and "none" in enum_values:
return None
if str(item) in enum_values:
return str(item)
if item is False and 'no' in enum_values:
return 'no'
if item is True and 'yes' in enum_values:
return 'yes'
raise self.validation_error(
item, validation_failure_info,
f'Entry "{item}" is not valid for enum. Valid values are: {str(param)}')
def _validate_type_machine(self, item, param, validation_failure_info):
if item is None:
return None
section = getattr(self.machine, param, [])
if not isinstance(item, str):
raise self.validation_error(item, validation_failure_info,
'Expected "{}" in "{}" to be string'.format(item, param),
10)
if not item:
raise self.validation_error(item, validation_failure_info,
'Setting "{}" is empty'.format(param),
14)
if item in section:
return section[item]
raise self.validation_error(item, validation_failure_info,
'Device "{}" not found in "{}:" section in your config.'.format(item, param),
6)
@classmethod
def _validate_type_list(cls, item, validation_failure_info):
del validation_failure_info
return Util.string_to_list(item)
def _validate_type_int_from_hex(self, item, validation_failure_info):
try:
return Util.hex_string_to_int(item)
except ValueError:
raise self.validation_error(item, validation_failure_info, "Could hex convert to int")
@classmethod
def _validate_type_gain(cls, item, validation_failure_info):
del validation_failure_info
if item is None:
return None
return Util.string_to_gain(item)
def _validate_type_str(self, item, validation_failure_info):
if isinstance(item, (list, dict)):
raise self.validation_error(item, validation_failure_info, "List or dict are not string")
if item is not None:
return str(item)
return None
@classmethod
def _validate_type_lstr(cls, item, validation_failure_info):
del validation_failure_info
if item is not None:
return str(item).lower()
return None
def _validate_type_template_str(self, item, validation_failure_info):
del validation_failure_info
if item is None:
return None
item = str(item)
if "{" in item:
return self.machine.placeholder_manager.build_text_template(item)
return self.machine.placeholder_manager.build_quoted_string_template(item)
def _validate_type_template_float(self, item, validation_failure_info, param=None):
del param
if item is None:
return None
if not isinstance(item, (str, float, int)):
raise self.validation_error(item, validation_failure_info, "Template has to be string/int/float.")
return self.machine.placeholder_manager.build_float_template(item)
def _assert_int_float_template(self, item, validation_failure_info):
"""Assert that templates are sting or int."""
if not isinstance(item, (str, int)):
raise self.validation_error(item, validation_failure_info, "Template has to be string/int.")
def _validate_type_template_secs(self, item, validation_failure_info):
if item is None:
return None
self._assert_int_float_template(item, validation_failure_info)
# try to convert to float. if we fail it will be a template
try:
item = Util.string_to_secs(item)
except ValueError:
pass
return self.machine.placeholder_manager.build_float_template(item)
def _validate_type_template_ms(self, item, validation_failure_info):
if item is None:
return None
self._assert_int_float_template(item, validation_failure_info)
# try to convert to int. if we fail it will be a template
try:
item = Util.string_to_ms(item)
except ValueError:
pass
return self.machine.placeholder_manager.build_int_template(item)
def _validate_type_template_int(self, item, validation_failure_info):
if item is None:
return None
self._assert_int_float_template(item, validation_failure_info)
return self.machine.placeholder_manager.build_int_template(item)
def _validate_type_template_bool(self, item, validation_failure_info):
if item is None:
return None
if not isinstance(item, (str, bool)):
raise self.validation_error(item, validation_failure_info, "Template has to be string/bool.")
return self.machine.placeholder_manager.build_bool_template(item)
def _validate_range_min_smaller_max(self, item, value, param, validation_failure_info):
"""Assert that value is within boundaries for numeric template."""
if param:
param = param.split(",")
if param[0] != "NONE" and value < float(param[0]):
raise self.validation_error(item, validation_failure_info,
"{} is smaller then {}".format(value, param[0]))
if param[1] != "NONE" and value > float(param[1]):
raise self.validation_error(item, validation_failure_info,
"{} is larger then {}".format(value, param[1]))
def _validate_type_float(self, item, validation_failure_info, param=None):
if item is None:
return None
try:
value = float(item)
except (TypeError, ValueError):
raise self.validation_error(item, validation_failure_info, "Could not convert to float")
self._validate_range_min_smaller_max(item, value, param, validation_failure_info)
return value
def _validate_type_int(self, item, validation_failure_info, param=None):
if item is None:
return None
try:
value = int(item)
except (TypeError, ValueError):
raise self.validation_error(item, validation_failure_info, "Could not convert {} to int".format(item))
self._validate_range_min_smaller_max(item, value, param, validation_failure_info)
return value
def _validate_type_num(self, item, validation_failure_info, param=None):
if item is None:
return None
# used for int or float, but does not convert one to the other
if isinstance(item, (int, float)):
value = item
else:
try:
if '.' in item:
value = float(item)
else:
value = int(item)
except (TypeError, ValueError):
raise self.validation_error(item, validation_failure_info, "Could not convert {} to num".format(item))
self._validate_range_min_smaller_max(item, value, param, validation_failure_info)
return value
def _validate_type_bool(self, item, validation_failure_info, param=None):
assert not param
if item is None:
return None
if isinstance(item, bool):
return item
if isinstance(item, str):
if item.lower() in ['false', 'f', 'no', 'disable', 'off']:
return False
if item.lower() in ['true', 't', 'yes', 'enable', 'on']:
return True
raise self.validation_error(item, validation_failure_info, "Cannot convert value to boolean.", 13)
def _validate_type_ms(self, item, validation_failure_info, param=None):
assert not param
if item is not None:
try:
return Util.string_to_ms(item)
except ValueError:
raise self.validation_error(item, validation_failure_info, "Cannot convert value to ms.", 11)
return None
def _validate_type_secs(self, item, validation_failure_info, param=None):
assert not param
if item is not None:
try:
return Util.string_to_secs(item)
except ValueError:
raise self.validation_error(item, validation_failure_info, "Cannot convert value to secs.", 11)
return None
def _validate_type_dict(self, item, validation_failure_info, param=None):
if not item:
return {}
if not isinstance(item, dict):
raise self.validation_error(item, validation_failure_info, "Item is not a dict.")
if param:
return self._validate_dict("dict", param, validation_failure_info, item)
return item
def _validate_type_kivycolor(self, item, validation_failure_info):
# Validate colors that will be used by Kivy. The result is a 4-item
# list, RGBA, with individual values from 0.0 - 1.0
if not item:
return None
color_string = str(item).lower()
if color_string[:1] == "(" and color_string[-1:] == ")":
return color_string
if color_string in NAMED_RGB_COLORS:
color = list(NAMED_RGB_COLORS[color_string])
elif Util.is_hex_string(color_string):
color = [int(x, 16) for x in
re.split('([0-9a-f]{2})', color_string) if x != '']
else:
color = Util.string_to_list(color_string)
for i, x in enumerate(color):
try:
color[i] = int(x) / 255
except ValueError:
raise self.validation_error(item, validation_failure_info,
"Color could not be converted to int for kivy.")
if len(color) == 3:
color.append(1)
return color
def _validate_type_color(self, item, validation_failure_info, param=None):
assert not param
if isinstance(item, tuple):
if len(item) != 3:
raise self.validation_error(item, validation_failure_info, "Color needs three components")
return item
# Validates colors by name, hex, or list, into a 3-item list, RGB,
# with individual values from 0-255
color_string = str(item)
if color_string in NAMED_RGB_COLORS:
return NAMED_RGB_COLORS[color_string]
if Util.is_hex_string(color_string):
return RGBColor.hex_to_rgb(color_string)
color = Util.string_to_list(color_string)
try:
return int(color[0]), int(color[1]), int(color[2])
except (IndexError, ValueError) as e:
raise self.validation_error(item, validation_failure_info, "Could not parse color: {}".format(e))
def _validate_type_bool_int(self, item, validation_failure_info):
if self._validate_type_bool(item, validation_failure_info):
return 1
return 0
def _validate_type_pow2(self, item, validation_failure_info):
if item is None:
return None
if not Util.is_power2(item):
raise self.validation_error(item, validation_failure_info, "Could not convert {} to pow2".format(item))
return item
def validate_item(self, item, validator, validation_failure_info):
"""Validate an item using a validator."""
try:
if item.lower() == 'none':
item = None
except AttributeError:
pass
if '(' in validator and validator[-1:] == ')':
validator_parts = validator.split('(', maxsplit=1)
validator = validator_parts[0]
param = validator_parts[1][:-1]
return self.validator_list[validator](item, validation_failure_info=validation_failure_info, param=param)
if validator in self.validator_list:
return self.validator_list[validator](item, validation_failure_info=validation_failure_info)
raise ConfigFileError("Invalid Validator '{}' in config spec {}".format(
validator, self._build_error_path(validation_failure_info)), 4, self.log.name)
def _build_error_path(self, validation_failure_info):
if validation_failure_info is None:
return ""
if validation_failure_info.parent:
return "{}:{}".format(self._build_error_path(validation_failure_info.parent), validation_failure_info.item)
return validation_failure_info.item
def validation_error(self, item, validation_failure_info, msg="", code=None):
"""Raise a validation error with all relevant infos."""
return ConfigFileError("Config validation error: Entry {} = \"{}\" is not valid. {}".format(
self._build_error_path(validation_failure_info),
item, msg), 5 if code is None else code, self.log.name)