109 lines
2.9 KiB
Python
109 lines
2.9 KiB
Python
# Eos - Verifiable elections
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# Copyright © 2017 RunasSudo (Yingtong Li)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import pymongo
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import uuid
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# Database
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# ========
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client = pymongo.MongoClient()
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db = client['test']
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# Fields
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# ======
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class Field:
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def __init__(self, *args, **kwargs):
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self.default = kwargs.get('default', None)
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self.hashed = kwargs.get('hashed', True)
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class PrimitiveField(Field):
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def serialise(self, value):
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return value
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def deserialise(self, value):
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return value
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DictField = PrimitiveField
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IntField = PrimitiveField
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ListField = PrimitiveField
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StringField = PrimitiveField
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class EmbeddedObjectField(Field):
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def __init__(self, object_type=None, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.object_type = object_type
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def serialise(self, value):
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return value.serialise_and_wrap(self.object_type)
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def deserialise(self, value):
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return EosObject.deserialise_and_unwrap(value, self.object_type)
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class ListField(Field):
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def __init__(self, element_field=None, *args, **kwargs):
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super().__init__(default=[], *args, **kwargs)
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self.element_field = element_field
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def serialise(self, value):
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return [self.element_field.serialise(x) for x in value]
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def deserialise(self, value):
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return [self.element_field.deserialise(x) for x in value]
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EmbeddedObjectListField = ListField
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class UUIDField(Field):
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def __init__(self, *args, **kwargs):
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super().__init__(default=uuid.uuid4, *args, **kwargs)
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def serialise(self, value):
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return str(uuid.uuid4)
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def unserialise(self, value):
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return uuid.uuid4(value)
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# Objects
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# =======
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class EosObjectType(type):
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def __new__(meta, name, bases, attrs):
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#meta, name, bases, attrs = meta.before_new(meta, name, bases, attrs)
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cls = type.__new__(meta, name, bases, attrs)
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# Process fields
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fields = cls._fields if hasattr(cls, '_fields') else {}
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for attr in list(dir(cls)):
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val = getattr(cls, attr)
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if isinstance(val, Field):
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fields[attr] = val
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delattr(cls, attr)
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cls._fields = fields
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cls._name = cls.__module__ + '.' + cls.__qualname__
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return cls
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class EosObject(metaclass=EosObjectType):
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def __init__(self, *args, **kwargs):
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for attr, val in self._fields.items():
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setattr(self, attr, kwargs.get(attr, val.default))
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TopLevelObject = EosObject
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EmbeddedObject = EosObject
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