Rename django_etesync to django_etebase.
This commit is contained in:
Tom Hacohen
222
django_etebase/models.py
Normal file
222
django_etebase/models.py
Normal file
@@ -0,0 +1,222 @@
|
||||
# Copyright © 2017 Tom Hacohen
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as
|
||||
# published by the Free Software Foundation, version 3.
|
||||
#
|
||||
# This library is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
from pathlib import Path
|
||||
|
||||
from django.db import models, transaction
|
||||
from django.conf import settings
|
||||
from django.core.validators import RegexValidator
|
||||
from django.db.models import Q
|
||||
from django.utils.functional import cached_property
|
||||
from django.utils.crypto import get_random_string
|
||||
|
||||
|
||||
Base64Url256BitlValidator = RegexValidator(regex=r'^[a-zA-Z0-9\-_]{42,43}$', message='Expected a base64url.')
|
||||
UidValidator = RegexValidator(regex=r'^[a-zA-Z0-9]*$', message='Not a valid UID')
|
||||
|
||||
|
||||
class Collection(models.Model):
|
||||
uid = models.CharField(db_index=True, blank=False, null=False,
|
||||
max_length=43, validators=[UidValidator])
|
||||
version = models.PositiveSmallIntegerField()
|
||||
owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('uid', 'owner')
|
||||
|
||||
def __str__(self):
|
||||
return self.uid
|
||||
|
||||
@cached_property
|
||||
def main_item(self):
|
||||
return self.items.get(uid=None)
|
||||
|
||||
@property
|
||||
def content(self):
|
||||
return self.main_item.content
|
||||
|
||||
@property
|
||||
def etag(self):
|
||||
return self.content.uid
|
||||
|
||||
@cached_property
|
||||
def stoken(self):
|
||||
stoken = Stoken.objects.filter(
|
||||
Q(collectionitemrevision__item__collection=self) | Q(collectionmember__collection=self)
|
||||
).order_by('id').last()
|
||||
|
||||
if stoken is None:
|
||||
raise Exception('stoken is None. Should never happen')
|
||||
|
||||
return stoken.uid
|
||||
|
||||
|
||||
class CollectionItem(models.Model):
|
||||
uid = models.CharField(db_index=True, blank=False, null=True,
|
||||
max_length=43, validators=[UidValidator])
|
||||
collection = models.ForeignKey(Collection, related_name='items', on_delete=models.CASCADE)
|
||||
version = models.PositiveSmallIntegerField()
|
||||
encryptionKey = models.BinaryField(editable=True, blank=False, null=True)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('uid', 'collection')
|
||||
|
||||
def __str__(self):
|
||||
return '{} {}'.format(self.uid, self.collection.uid)
|
||||
|
||||
@cached_property
|
||||
def content(self):
|
||||
return self.revisions.get(current=True)
|
||||
|
||||
@property
|
||||
def etag(self):
|
||||
return self.content.uid
|
||||
|
||||
|
||||
def chunk_directory_path(instance, filename):
|
||||
item = instance.item
|
||||
col = item.collection
|
||||
user_id = col.owner.id
|
||||
item_uid = item.uid or 'main'
|
||||
return Path('user_{}'.format(user_id), col.uid, item_uid, instance.uid)
|
||||
|
||||
|
||||
class CollectionItemChunk(models.Model):
|
||||
uid = models.CharField(db_index=True, blank=False, null=False,
|
||||
max_length=43, validators=[Base64Url256BitlValidator])
|
||||
item = models.ForeignKey(CollectionItem, related_name='chunks', on_delete=models.CASCADE)
|
||||
chunkFile = models.FileField(upload_to=chunk_directory_path, max_length=150, unique=True)
|
||||
|
||||
def __str__(self):
|
||||
return self.uid
|
||||
|
||||
|
||||
def generate_stoken_uid():
|
||||
return get_random_string(32, allowed_chars='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_')
|
||||
|
||||
|
||||
class Stoken(models.Model):
|
||||
uid = models.CharField(db_index=True, unique=True, blank=False, null=False, default=generate_stoken_uid,
|
||||
max_length=43, validators=[Base64Url256BitlValidator])
|
||||
|
||||
|
||||
class CollectionItemRevision(models.Model):
|
||||
stoken = models.OneToOneField(Stoken, on_delete=models.PROTECT)
|
||||
uid = models.CharField(db_index=True, unique=True, blank=False, null=False,
|
||||
max_length=43, validators=[Base64Url256BitlValidator])
|
||||
salt = models.BinaryField(editable=True, blank=False, null=False, default=b'')
|
||||
item = models.ForeignKey(CollectionItem, related_name='revisions', on_delete=models.CASCADE)
|
||||
meta = models.BinaryField(editable=True, blank=False, null=False)
|
||||
current = models.BooleanField(db_index=True, default=True, null=True)
|
||||
deleted = models.BooleanField(default=False)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('item', 'current')
|
||||
|
||||
def __str__(self):
|
||||
return '{} {} current={}'.format(self.uid, self.item.uid, self.current)
|
||||
|
||||
|
||||
class RevisionChunkRelation(models.Model):
|
||||
chunk = models.ForeignKey(CollectionItemChunk, related_name='revisions_relation', on_delete=models.CASCADE)
|
||||
revision = models.ForeignKey(CollectionItemRevision, related_name='chunks_relation', on_delete=models.CASCADE)
|
||||
|
||||
class Meta:
|
||||
ordering = ('id', )
|
||||
|
||||
|
||||
class AccessLevels(models.TextChoices):
|
||||
ADMIN = 'adm'
|
||||
READ_WRITE = 'rw'
|
||||
READ_ONLY = 'ro'
|
||||
|
||||
|
||||
class CollectionMember(models.Model):
|
||||
stoken = models.OneToOneField(Stoken, on_delete=models.PROTECT, null=True)
|
||||
collection = models.ForeignKey(Collection, related_name='members', on_delete=models.CASCADE)
|
||||
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
|
||||
encryptionKey = models.BinaryField(editable=True, blank=False, null=False)
|
||||
accessLevel = models.CharField(
|
||||
max_length=3,
|
||||
choices=AccessLevels.choices,
|
||||
default=AccessLevels.READ_ONLY,
|
||||
)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('user', 'collection')
|
||||
|
||||
def __str__(self):
|
||||
return '{} {}'.format(self.collection.uid, self.user)
|
||||
|
||||
def revoke(self):
|
||||
with transaction.atomic():
|
||||
CollectionMemberRemoved.objects.update_or_create(
|
||||
collection=self.collection, user=self.user,
|
||||
defaults={
|
||||
'stoken': Stoken.objects.create(),
|
||||
},
|
||||
)
|
||||
|
||||
self.delete()
|
||||
|
||||
|
||||
class CollectionMemberRemoved(models.Model):
|
||||
stoken = models.OneToOneField(Stoken, on_delete=models.PROTECT, null=True)
|
||||
collection = models.ForeignKey(Collection, related_name='removed_members', on_delete=models.CASCADE)
|
||||
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('user', 'collection')
|
||||
|
||||
def __str__(self):
|
||||
return '{} {}'.format(self.collection.uid, self.user)
|
||||
|
||||
|
||||
class CollectionInvitation(models.Model):
|
||||
uid = models.CharField(db_index=True, blank=False, null=False,
|
||||
max_length=43, validators=[Base64Url256BitlValidator])
|
||||
version = models.PositiveSmallIntegerField(default=1)
|
||||
fromMember = models.ForeignKey(CollectionMember, on_delete=models.CASCADE)
|
||||
# FIXME: make sure to delete all invitations for the same collection once one is accepted
|
||||
# Make sure to not allow invitations if already a member
|
||||
|
||||
user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='incoming_invitations', on_delete=models.CASCADE)
|
||||
signedEncryptionKey = models.BinaryField(editable=False, blank=False, null=False)
|
||||
accessLevel = models.CharField(
|
||||
max_length=3,
|
||||
choices=AccessLevels.choices,
|
||||
default=AccessLevels.READ_ONLY,
|
||||
)
|
||||
|
||||
class Meta:
|
||||
unique_together = ('user', 'fromMember')
|
||||
|
||||
def __str__(self):
|
||||
return '{} {}'.format(self.fromMember.collection.uid, self.user)
|
||||
|
||||
@cached_property
|
||||
def collection(self):
|
||||
return self.fromMember.collection
|
||||
|
||||
|
||||
class UserInfo(models.Model):
|
||||
owner = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, primary_key=True)
|
||||
version = models.PositiveSmallIntegerField(default=1)
|
||||
loginPubkey = models.BinaryField(editable=True, blank=False, null=False)
|
||||
pubkey = models.BinaryField(editable=True, blank=False, null=False)
|
||||
encryptedContent = models.BinaryField(editable=True, blank=False, null=False)
|
||||
salt = models.BinaryField(editable=True, blank=False, null=False)
|
||||
|
||||
def __str__(self):
|
||||
return "UserInfo<{}>".format(self.owner)
|
||||
Reference in New Issue
Block a user