77 lines
3.0 KiB
Python
77 lines
3.0 KiB
Python
import importlib
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import logging
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import re
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from django.apps import AppConfig as _AppConfig
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from django.core.exceptions import ImproperlyConfigured
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from ..config import DJANGO_MAIN_MODULE, MODULE_APP_SETTINGS_PREFIX
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logger = logging.getLogger(__name__)
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class DefaultSetting: # pylint: disable=too-few-public-methods
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def __init__(self, name, value, key_name=None, validator=None):
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self.name = name
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self.value = value
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if key_name is None:
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self.key_name = self.name.upper()
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else:
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self.key_name = key_name
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self.validator = validator
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def validate(self, value):
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if self.validator is None:
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return
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if callable(self.validator):
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if not self.validator(value):
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raise ImproperlyConfigured('Validator callback {clb} returned False'.format(clb=self.validator))
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else:
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if not re.search(self.validator, value):
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raise ImproperlyConfigured('Does not match /{re}/'.format(re=self.validator))
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class AppSettings: # pylint: disable=too-few-public-methods
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def __init__(self, app_name, defaults):
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settings_name = '{main_module}.{prefix}{app_name}'.format(main_module=DJANGO_MAIN_MODULE,
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prefix=MODULE_APP_SETTINGS_PREFIX,
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app_name=app_name)
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try:
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settings_module = importlib.import_module(settings_name)
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except ImportError:
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settings_module = None
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for default in defaults:
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if hasattr(settings_module, default.key_name):
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value = getattr(settings_module, default.key_name)
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try:
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default.validate(value)
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except ImproperlyConfigured as e:
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msg = 'Invalid value of {key} in {module}: {cause}'.format(key=default.key_name,
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module=settings_name,
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cause=e)
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raise ImproperlyConfigured(msg) from e
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setattr(self, default.name, value)
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elif isinstance(default.value, ImproperlyConfigured):
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raise default.value
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else:
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try:
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is_impconf = issubclass(default.value, ImproperlyConfigured)
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except TypeError:
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is_impconf = False
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if is_impconf:
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msg = '{key} must be defined in {module}'.format(key=default.key_name,
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module=settings_name)
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raise default.value(msg)
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setattr(self, default.name, default.value)
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class AppConfig(_AppConfig):
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default_settings = ()
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def __init__(self, app_name, app_module):
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super().__init__(app_name, app_module)
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self.settings = AppSettings(app_name, self.default_settings)
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