moviewyrm/bookwyrm/models/relationship.py

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''' defines relationships between users '''
from django.db import models
from bookwyrm import activitypub
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from .base_model import BookWyrmModel
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class UserRelationship(BookWyrmModel):
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''' many-to-many through table for followers '''
user_subject = models.ForeignKey(
'User',
on_delete=models.PROTECT,
related_name='%(class)s_user_subject'
)
user_object = models.ForeignKey(
'User',
on_delete=models.PROTECT,
related_name='%(class)s_user_object'
)
# follow or follow_request for pending TODO: blocking?
relationship_id = models.CharField(max_length=100)
class Meta:
''' relationships should be unique '''
abstract = True
constraints = [
models.UniqueConstraint(
fields=['user_subject', 'user_object'],
name='%(class)s_unique'
),
models.CheckConstraint(
check=~models.Q(user_subject=models.F('user_object')),
name='%(class)s_no_self'
)
]
def get_remote_id(self):
''' use shelf identifier in remote_id '''
base_path = self.user_subject.remote_id
return '%s#%s/%d' % (base_path, self.status, self.id)
class UserFollows(UserRelationship):
''' Following a user '''
status = 'follows'
@classmethod
def from_request(cls, follow_request):
''' converts a follow request into a follow relationship '''
return cls(
user_subject=follow_request.user_subject,
user_object=follow_request.user_object,
relationship_id=follow_request.relationship_id,
)
class UserFollowRequest(UserRelationship):
''' following a user requires manual or automatic confirmation '''
status = 'follow_request'
def to_activity(self):
''' request activity '''
return activitypub.Follow(
id=self.remote_id,
actor=self.user_subject.remote_id,
object=self.user_object.remote_id,
).serialize()
def to_accept_activity(self):
''' generate an Accept for this follow request '''
return activitypub.Accept(
id='%s#accepts/follows/' % self.remote_id,
actor=self.user_subject.remote_id,
object=self.user_object.remote_id,
).serialize()
def to_reject_activity(self):
''' generate an Accept for this follow request '''
return activitypub.Reject(
id='%s#rejects/follows/' % self.remote_id,
actor=self.user_subject.remote_id,
object=self.user_object.remote_id,
).serialize()
class UserBlocks(UserRelationship):
''' prevent another user from following you and seeing your posts '''
# TODO: not implemented
status = 'blocks'