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100 lines
3.1 KiB
Python
100 lines
3.1 KiB
Python
''' defines relationships between users '''
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from django.db import models
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from bookwyrm import activitypub
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from .base_model import ActivitypubMixin, ActivityMapping, BookWyrmModel
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class UserRelationship(ActivitypubMixin, BookWyrmModel):
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''' many-to-many through table for followers '''
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user_subject = models.ForeignKey(
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'User',
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on_delete=models.PROTECT,
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related_name='%(class)s_user_subject'
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)
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user_object = models.ForeignKey(
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'User',
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on_delete=models.PROTECT,
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related_name='%(class)s_user_object'
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)
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class Meta:
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''' relationships should be unique '''
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abstract = True
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constraints = [
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models.UniqueConstraint(
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fields=['user_subject', 'user_object'],
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name='%(class)s_unique'
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),
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models.CheckConstraint(
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check=~models.Q(user_subject=models.F('user_object')),
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name='%(class)s_no_self'
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)
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]
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activity_mappings = [
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ActivityMapping('id', 'remote_id'),
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ActivityMapping('actor', 'user_subject'),
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ActivityMapping('object', 'user_object'),
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]
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activity_serializer = activitypub.Follow
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def get_remote_id(self, status=None):
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''' use shelf identifier in remote_id '''
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status = status or 'follows'
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base_path = self.user_subject.remote_id
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return '%s#%s/%d' % (base_path, status, self.id)
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def to_accept_activity(self):
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''' generate an Accept for this follow request '''
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return activitypub.Accept(
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id=self.get_remote_id(status='accepts'),
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actor=self.user_object.remote_id,
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object=self.to_activity()
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).serialize()
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def to_reject_activity(self):
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''' generate an Accept for this follow request '''
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return activitypub.Reject(
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id=self.get_remote_id(status='rejects'),
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actor=self.user_object.remote_id,
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object=self.to_activity()
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).serialize()
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class UserFollows(UserRelationship):
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''' Following a user '''
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status = 'follows'
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@classmethod
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def from_request(cls, follow_request):
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''' converts a follow request into a follow relationship '''
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return cls(
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user_subject=follow_request.user_subject,
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user_object=follow_request.user_object,
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remote_id=follow_request.remote_id,
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)
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class UserFollowRequest(UserRelationship):
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''' following a user requires manual or automatic confirmation '''
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status = 'follow_request'
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def save(self, *args, **kwargs):
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''' make sure the follow relationship doesn't already exist '''
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try:
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UserFollows.objects.get(
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user_subject=self.user_subject,
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user_object=self.user_object
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)
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return None
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except UserFollows.DoesNotExist:
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return super().save(*args, **kwargs)
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class UserBlocks(UserRelationship):
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''' prevent another user from following you and seeing your posts '''
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# TODO: not implemented
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status = 'blocks'
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