moviewyrm/bookwyrm/models/shelf.py
2020-11-10 14:56:53 -08:00

84 lines
2.6 KiB
Python

''' puttin' books on shelves '''
import re
from django.db import models
from bookwyrm import activitypub
from .base_model import BookWyrmModel, OrderedCollectionMixin, PrivacyLevels
class Shelf(OrderedCollectionMixin, BookWyrmModel):
''' a list of books owned by a user '''
name = models.CharField(max_length=100)
identifier = models.CharField(max_length=100)
user = models.ForeignKey('User', on_delete=models.PROTECT)
editable = models.BooleanField(default=True)
privacy = models.CharField(
max_length=255,
default='public',
choices=PrivacyLevels.choices
)
books = models.ManyToManyField(
'Edition',
symmetrical=False,
through='ShelfBook',
through_fields=('shelf', 'book')
)
def save(self, *args, **kwargs):
''' set the identifier '''
saved = super().save(*args, **kwargs)
if not self.identifier:
slug = re.sub(r'[^\w]', '', self.name).lower()
self.identifier = '%s-%d' % (slug, self.id)
return super().save(*args, **kwargs)
return saved
@property
def collection_queryset(self):
''' list of books for this shelf, overrides OrderedCollectionMixin '''
return self.books
def get_remote_id(self):
''' shelf identifier instead of id '''
base_path = self.user.remote_id
return '%s/shelf/%s' % (base_path, self.identifier)
class Meta:
''' user/shelf unqiueness '''
unique_together = ('user', 'identifier')
class ShelfBook(BookWyrmModel):
''' many to many join table for books and shelves '''
book = models.ForeignKey('Edition', on_delete=models.PROTECT)
shelf = models.ForeignKey('Shelf', on_delete=models.PROTECT)
added_by = models.ForeignKey(
'User',
blank=True,
null=True,
on_delete=models.PROTECT
)
def to_add_activity(self, user):
''' AP for shelving a book'''
return activitypub.Add(
id='%s#add' % self.remote_id,
actor=user.remote_id,
object=self.book.to_activity(),
target=self.shelf.remote_id,
).serialize()
def to_remove_activity(self, user):
''' AP for un-shelving a book'''
return activitypub.Remove(
id='%s#remove' % self.remote_id,
actor=user.remote_id,
object=self.book.to_activity(),
target=self.shelf.to_activity()
).serialize()
class Meta:
''' an opinionated constraint!
you can't put a book on shelf twice '''
unique_together = ('book', 'shelf')