forked from mirrors/bookwyrm
155 lines
4.9 KiB
Python
155 lines
4.9 KiB
Python
""" do book related things with other users """
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from django.apps import apps
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from django.db import models, IntegrityError, transaction
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from django.db.models import Q
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from bookwyrm.settings import DOMAIN
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from .base_model import BookWyrmModel
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from . import fields
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from .relationship import UserBlocks
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# from .user import User
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class Group(BookWyrmModel):
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"""A group of users"""
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name = fields.CharField(max_length=100)
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user = fields.ForeignKey("User", on_delete=models.PROTECT)
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description = fields.TextField(blank=True, null=True)
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privacy = fields.PrivacyField()
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def get_remote_id(self):
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"""don't want the user to be in there in this case"""
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return f"https://{DOMAIN}/group/{self.id}"
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class GroupMember(models.Model):
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"""Users who are members of a group"""
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created_date = models.DateTimeField(auto_now_add=True)
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updated_date = models.DateTimeField(auto_now=True)
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group = models.ForeignKey(
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"Group", on_delete=models.CASCADE, related_name="memberships"
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)
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user = models.ForeignKey(
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"User", on_delete=models.CASCADE, related_name="memberships"
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)
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class Meta:
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"""Users can only have one membership per group"""
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constraints = [
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models.UniqueConstraint(fields=["group", "user"], name="unique_membership")
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]
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def save(self, *args, **kwargs):
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"""don't let a user invite someone who blocked them"""
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# blocking in either direction is a no-go
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if UserBlocks.objects.filter(
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Q(
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user_subject=self.group.user,
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user_object=self.user,
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)
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| Q(
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user_subject=self.user,
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user_object=self.group.user,
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)
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).exists():
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raise IntegrityError()
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# accepts and requests are handled by the GroupInvitation model
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super().save(*args, **kwargs)
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@classmethod
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def from_request(cls, join_request):
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"""converts a join request into a member relationship"""
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# remove the invite
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join_request.delete()
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# make a group member
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return cls.objects.create(
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user=join_request.user,
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group=join_request.group,
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)
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class GroupMemberInvitation(models.Model):
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"""adding a user to a group requires manual confirmation"""
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created_date = models.DateTimeField(auto_now_add=True)
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group = models.ForeignKey(
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"Group", on_delete=models.CASCADE, related_name="user_invitations"
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)
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user = models.ForeignKey(
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"User", on_delete=models.CASCADE, related_name="group_invitations"
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)
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class Meta:
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"""Users can only have one outstanding invitation per group"""
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constraints = [
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models.UniqueConstraint(fields=["group", "user"], name="unique_invitation")
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]
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def save(self, *args, **kwargs):
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"""make sure the membership doesn't already exist"""
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# if there's an invitation for a membership that already exists, accept it
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# without changing the local database state
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if GroupMember.objects.filter(user=self.user, group=self.group).exists():
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self.accept()
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return
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# blocking in either direction is a no-go
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if UserBlocks.objects.filter(
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Q(
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user_subject=self.group.user,
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user_object=self.user,
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)
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| Q(
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user_subject=self.user,
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user_object=self.group.user,
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)
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).exists():
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raise IntegrityError()
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# make an invitation
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super().save(*args, **kwargs)
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# now send the invite
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model = apps.get_model("bookwyrm.Notification", require_ready=True)
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notification_type = "INVITE"
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model.objects.create(
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user=self.user,
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related_user=self.group.user,
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related_group=self.group,
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notification_type=notification_type,
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)
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def accept(self):
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"""turn this request into the real deal"""
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with transaction.atomic():
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GroupMember.from_request(self)
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model = apps.get_model("bookwyrm.Notification", require_ready=True)
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# tell the group owner
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model.objects.create(
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user=self.group.user,
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related_user=self.user,
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related_group=self.group,
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notification_type="ACCEPT",
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)
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# let the other members know about it
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for membership in self.group.memberships.all():
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member = membership.user
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if member not in (self.user, self.group.user):
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model.objects.create(
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user=member,
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related_user=self.user,
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related_group=self.group,
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notification_type="JOIN",
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)
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def reject(self):
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"""generate a Reject for this membership request"""
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self.delete()
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