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devicehub-teal/ereuse_devicehub/resources/proof/models.py

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"""This file contains all proofs related to actions
"""
from collections import Iterable
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from datetime import datetime
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from typing import Optional, Set, Union
from uuid import uuid4
from boltons import urlutils
from citext import CIText
from flask import current_app as app, g
from sortedcontainers import SortedSet
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from sqlalchemy import BigInteger, Column, Enum as DBEnum, \
ForeignKey, Integer, Unicode
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from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy.ext.orderinglist import ordering_list
from sqlalchemy.orm import backref, relationship, validates
from sqlalchemy.util import OrderedSet
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from teal.db import CASCADE_OWN, INHERIT_COND, POLYMORPHIC_ID, \
POLYMORPHIC_ON, StrictVersionType, URL
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from teal.marshmallow import ValidationError
from teal.resource import url_for_resource
from ereuse_devicehub.db import db
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from ereuse_devicehub.resources.action.models import Action, DisposeProduct, \
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EraseBasic, Rate, Trade
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from ereuse_devicehub.resources.models import Thing
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class JoinedTableMixin:
# noinspection PyMethodParameters
@declared_attr
def id(cls):
return Column(UUID(as_uuid=True), ForeignKey(Proof.id), primary_key=True)
class Proof(Thing):
"""Proof over an action.
"""
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
type = Column(Unicode, nullable=False)
ethereum_hashes = Column(CIText(), default='', nullable=False)
@property
def url(self) -> urlutils.URL:
"""The URL where to GET this proof."""
return urlutils.URL(url_for_resource(Proof, item_id=self.id))
@property
def certificate(self) -> Optional[urlutils.URL]:
return None
# noinspection PyMethodParameters
@declared_attr
def __mapper_args__(cls):
"""Defines inheritance.
From `the guide <http://docs.sqlalchemy.org/en/latest/orm/
extensions/declarative/api.html
#sqlalchemy.ext.declarative.declared_attr>`_
"""
args = {POLYMORPHIC_ID: cls.t}
if cls.t == 'Proof':
args[POLYMORPHIC_ON] = cls.type
# noinspection PyUnresolvedReferences
if JoinedTableMixin in cls.mro():
args[INHERIT_COND] = cls.id == Proof.id
return args
def __init__(self, **kwargs) -> None:
# sortedset forces us to do this before calling our parent init
super().__init__(**kwargs)
def __repr__(self):
return '<{0.t} {0.id} >'.format(self)
class ProofTransfer(JoinedTableMixin, Proof):
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transfer_id = Column(UUID, ForeignKey(Trade.id), nullable=False)
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transfer = relationship(DisposeProduct,
primaryjoin=DisposeProduct.id == transfer_id)
class ProofDataWipe(JoinedTableMixin, Proof):
erasure_type = Column(CIText())
date = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
result = db.Column(db.Boolean, default=False, nullable=False)
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erasure_id = Column(UUID, ForeignKey(EraseBasic.id), nullable=False)
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erasure = relationship(EraseBasic,
backref=backref('proofs_datawipe',
lazy=True,
cascade=CASCADE_OWN),
primaryjoin=EraseBasic.id == erasure_id)
class ProofFunction(JoinedTableMixin, Proof):
disk_usage = db.Column(db.Integer, default=0)
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rate_id = Column(UUID, ForeignKey(Rate.id), nullable=False)
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rate = relationship(Rate,
primaryjoin=Rate.id == rate_id)
class ProofReuse(JoinedTableMixin, Proof):
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price = db.Column(db.Integer)
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class ProofRecycling(JoinedTableMixin, Proof):
collection_point = Column(CIText())
date = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
contact = Column(CIText())
ticket = Column(CIText())
gps_location = Column(CIText())