100 lines
3.7 KiB
Python
100 lines
3.7 KiB
Python
import re
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from collections import OrderedDict
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from django.conf import settings
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from django.core.exceptions import ValidationError
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from django.utils.functional import Promise
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from orchestra.core import validators
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from orchestra.utils.python import import_class, format_exception
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default_app_config = 'orchestra.contrib.settings.apps.SettingsConfig'
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class Setting(object):
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"""
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Keeps track of the defined settings and provides extra batteries like value validation.
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"""
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conf_settings = settings
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settings = OrderedDict()
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def __str__(self):
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return self.name
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def __repr__(self):
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value = str(self.value)
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value = ("'%s'" if isinstance(value, str) else '%s') % value
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return '<%s: %s>' % (self.name, value)
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def __new__(cls, name, default, help_text="", choices=None, editable=True, serializable=True,
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multiple=False, validators=[], types=[], call_init=False):
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if call_init:
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return super(Setting, cls).__new__(cls)
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cls.settings[name] = cls(name, default, help_text=help_text, choices=choices, editable=editable,
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serializable=serializable, multiple=multiple, validators=validators, types=types, call_init=True)
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return cls.get_value(name, default)
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def __init__(self, *args, **kwargs):
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self.name, self.default = args
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for name, value in kwargs.items():
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setattr(self, name, value)
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self.value = self.get_value(self.name, self.default)
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self.settings[name] = self
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@classmethod
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def validate_choices(cls, value):
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if not isinstance(value, (list, tuple)):
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raise ValidationError("%s is not a valid choices." % str(value))
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for choice in value:
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if not isinstance(choice, (list, tuple)) or len(choice) != 2:
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raise ValidationError("%s is not a valid choice." % str(choice))
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value, verbose = choice
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if not isinstance(verbose, (str, Promise)):
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raise ValidationError("%s is not a valid verbose name." % value)
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@classmethod
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def validate_import_class(cls, value):
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try:
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import_class(value)
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except Exception as exc:
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raise ValidationError(format_exception(exc))
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@classmethod
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def validate_model_label(cls, value):
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from django.apps import apps
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try:
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apps.get_model(*value.split('.'))
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except Exception as exc:
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raise ValidationError(format_exception(exc))
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@classmethod
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def string_format_validator(cls, names, modulo=True):
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def validate_string_format(value, names=names, modulo=modulo):
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errors = []
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regex = r'%\(([^\)]+)\)' if modulo else r'{([^}]+)}'
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for n in re.findall(regex, value):
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if n not in names:
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errors.append(
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ValidationError('%s is not a valid format name.' % n)
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)
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if errors:
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raise ValidationError(errors)
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return validate_string_format
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def validate_value(self, value):
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if value:
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validators.all_valid(value, self.validators)
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valid_types = list(self.types)
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if isinstance(self.default, (list, tuple)):
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valid_types.extend([list, tuple])
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valid_types.append(type(self.default))
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if not isinstance(value, tuple(valid_types)):
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raise ValidationError("%s is not a valid type (%s)." %
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(type(value).__name__, ', '.join(t.__name__ for t in valid_types))
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)
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@classmethod
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def get_value(cls, name, default):
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return getattr(cls.conf_settings, name, default)
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