forked from mirrors/bookwyrm
403 lines
14 KiB
Python
403 lines
14 KiB
Python
""" database schema for books and shelves """
|
|
import re
|
|
|
|
from django.contrib.postgres.search import SearchVectorField
|
|
from django.contrib.postgres.indexes import GinIndex
|
|
from django.db import models, transaction
|
|
from django.db.models import Prefetch
|
|
from django.dispatch import receiver
|
|
from django.utils.translation import gettext_lazy as _
|
|
from model_utils import FieldTracker
|
|
from model_utils.managers import InheritanceManager
|
|
from imagekit.models import ImageSpecField
|
|
|
|
from bookwyrm import activitypub
|
|
from bookwyrm.preview_images import generate_edition_preview_image_task
|
|
from bookwyrm.settings import (
|
|
DOMAIN,
|
|
DEFAULT_LANGUAGE,
|
|
ENABLE_PREVIEW_IMAGES,
|
|
ENABLE_THUMBNAIL_GENERATION,
|
|
)
|
|
|
|
from .activitypub_mixin import OrderedCollectionPageMixin, ObjectMixin
|
|
from .base_model import BookWyrmModel
|
|
from . import fields
|
|
|
|
|
|
class BookDataModel(ObjectMixin, BookWyrmModel):
|
|
"""fields shared between editable book data (books, works, authors)"""
|
|
|
|
origin_id = models.CharField(max_length=255, null=True, blank=True)
|
|
openlibrary_key = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
inventaire_id = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
librarything_key = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
goodreads_key = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
bnf_id = fields.CharField( # Bibliothèque nationale de France
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
search_vector = SearchVectorField(null=True)
|
|
|
|
last_edited_by = fields.ForeignKey(
|
|
"User",
|
|
on_delete=models.PROTECT,
|
|
null=True,
|
|
)
|
|
|
|
class Meta:
|
|
"""can't initialize this model, that wouldn't make sense"""
|
|
|
|
abstract = True
|
|
|
|
def save(self, *args, **kwargs):
|
|
"""ensure that the remote_id is within this instance"""
|
|
if self.id:
|
|
self.remote_id = self.get_remote_id()
|
|
else:
|
|
self.origin_id = self.remote_id
|
|
self.remote_id = None
|
|
return super().save(*args, **kwargs)
|
|
|
|
def broadcast(self, activity, sender, software="bookwyrm"):
|
|
"""only send book data updates to other bookwyrm instances"""
|
|
super().broadcast(activity, sender, software=software)
|
|
|
|
|
|
class Book(BookDataModel):
|
|
"""a generic book, which can mean either an edition or a work"""
|
|
|
|
connector = models.ForeignKey("Connector", on_delete=models.PROTECT, null=True)
|
|
|
|
# book/work metadata
|
|
title = fields.TextField(max_length=255)
|
|
sort_title = fields.CharField(max_length=255, blank=True, null=True)
|
|
subtitle = fields.TextField(max_length=255, blank=True, null=True)
|
|
description = fields.HtmlField(blank=True, null=True)
|
|
languages = fields.ArrayField(
|
|
models.CharField(max_length=255), blank=True, default=list
|
|
)
|
|
series = fields.TextField(max_length=255, blank=True, null=True)
|
|
series_number = fields.CharField(max_length=255, blank=True, null=True)
|
|
subjects = fields.ArrayField(
|
|
models.CharField(max_length=255), blank=True, null=True, default=list
|
|
)
|
|
subject_places = fields.ArrayField(
|
|
models.CharField(max_length=255), blank=True, null=True, default=list
|
|
)
|
|
authors = fields.ManyToManyField("Author")
|
|
cover = fields.ImageField(
|
|
upload_to="covers/", blank=True, null=True, alt_field="alt_text"
|
|
)
|
|
preview_image = models.ImageField(
|
|
upload_to="previews/covers/", blank=True, null=True
|
|
)
|
|
first_published_date = fields.DateTimeField(blank=True, null=True)
|
|
published_date = fields.DateTimeField(blank=True, null=True)
|
|
|
|
objects = InheritanceManager()
|
|
field_tracker = FieldTracker(fields=["authors", "title", "subtitle", "cover"])
|
|
|
|
if ENABLE_THUMBNAIL_GENERATION:
|
|
cover_bw_book_xsmall_webp = ImageSpecField(
|
|
source="cover", id="bw:book:xsmall:webp"
|
|
)
|
|
cover_bw_book_xsmall_jpg = ImageSpecField(
|
|
source="cover", id="bw:book:xsmall:jpg"
|
|
)
|
|
cover_bw_book_small_webp = ImageSpecField(
|
|
source="cover", id="bw:book:small:webp"
|
|
)
|
|
cover_bw_book_small_jpg = ImageSpecField(source="cover", id="bw:book:small:jpg")
|
|
cover_bw_book_medium_webp = ImageSpecField(
|
|
source="cover", id="bw:book:medium:webp"
|
|
)
|
|
cover_bw_book_medium_jpg = ImageSpecField(
|
|
source="cover", id="bw:book:medium:jpg"
|
|
)
|
|
cover_bw_book_large_webp = ImageSpecField(
|
|
source="cover", id="bw:book:large:webp"
|
|
)
|
|
cover_bw_book_large_jpg = ImageSpecField(source="cover", id="bw:book:large:jpg")
|
|
cover_bw_book_xlarge_webp = ImageSpecField(
|
|
source="cover", id="bw:book:xlarge:webp"
|
|
)
|
|
cover_bw_book_xlarge_jpg = ImageSpecField(
|
|
source="cover", id="bw:book:xlarge:jpg"
|
|
)
|
|
cover_bw_book_xxlarge_webp = ImageSpecField(
|
|
source="cover", id="bw:book:xxlarge:webp"
|
|
)
|
|
cover_bw_book_xxlarge_jpg = ImageSpecField(
|
|
source="cover", id="bw:book:xxlarge:jpg"
|
|
)
|
|
|
|
@property
|
|
def author_text(self):
|
|
"""format a list of authors"""
|
|
return ", ".join(a.name for a in self.authors.all())
|
|
|
|
@property
|
|
def latest_readthrough(self):
|
|
"""most recent readthrough activity"""
|
|
return self.readthrough_set.order_by("-updated_date").first()
|
|
|
|
@property
|
|
def edition_info(self):
|
|
"""properties of this edition, as a string"""
|
|
items = [
|
|
self.physical_format if hasattr(self, "physical_format") else None,
|
|
self.languages[0] + " language"
|
|
if self.languages and self.languages[0] != "English"
|
|
else None,
|
|
str(self.published_date.year) if self.published_date else None,
|
|
", ".join(self.publishers) if hasattr(self, "publishers") else None,
|
|
]
|
|
return ", ".join(i for i in items if i)
|
|
|
|
@property
|
|
def alt_text(self):
|
|
"""image alt test"""
|
|
text = self.title
|
|
if self.edition_info:
|
|
text += f" ({self.edition_info})"
|
|
return text
|
|
|
|
def save(self, *args, **kwargs):
|
|
"""can't be abstract for query reasons, but you shouldn't USE it"""
|
|
if not isinstance(self, Edition) and not isinstance(self, Work):
|
|
raise ValueError("Books should be added as Editions or Works")
|
|
return super().save(*args, **kwargs)
|
|
|
|
def get_remote_id(self):
|
|
"""editions and works both use "book" instead of model_name"""
|
|
return f"https://{DOMAIN}/book/{self.id}"
|
|
|
|
def __repr__(self):
|
|
# pylint: disable=consider-using-f-string
|
|
return "<{} key={!r} title={!r}>".format(
|
|
self.__class__,
|
|
self.openlibrary_key,
|
|
self.title,
|
|
)
|
|
|
|
class Meta:
|
|
"""sets up postgres GIN index field"""
|
|
|
|
indexes = (GinIndex(fields=["search_vector"]),)
|
|
|
|
|
|
class Work(OrderedCollectionPageMixin, Book):
|
|
"""a work (an abstract concept of a book that manifests in an edition)"""
|
|
|
|
# library of congress catalog control number
|
|
lccn = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
|
|
def save(self, *args, **kwargs):
|
|
"""set some fields on the edition object"""
|
|
# set rank
|
|
for edition in self.editions.all():
|
|
edition.save()
|
|
return super().save(*args, **kwargs)
|
|
|
|
@property
|
|
def default_edition(self):
|
|
"""in case the default edition is not set"""
|
|
return self.editions.order_by("-edition_rank").first()
|
|
|
|
def to_edition_list(self, **kwargs):
|
|
"""an ordered collection of editions"""
|
|
return self.to_ordered_collection(
|
|
self.editions.order_by("-edition_rank").all(),
|
|
remote_id=f"{self.remote_id}/editions",
|
|
**kwargs,
|
|
)
|
|
|
|
activity_serializer = activitypub.Work
|
|
serialize_reverse_fields = [("editions", "editions", "-edition_rank")]
|
|
deserialize_reverse_fields = [("editions", "editions")]
|
|
|
|
|
|
# https://schema.org/BookFormatType
|
|
FormatChoices = [
|
|
("AudiobookFormat", _("Audiobook")),
|
|
("EBook", _("eBook")),
|
|
("GraphicNovel", _("Graphic novel")),
|
|
("Hardcover", _("Hardcover")),
|
|
("Paperback", _("Paperback")),
|
|
]
|
|
|
|
|
|
class Edition(Book):
|
|
"""an edition of a book"""
|
|
|
|
# these identifiers only apply to editions, not works
|
|
isbn_10 = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
isbn_13 = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
oclc_number = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
asin = fields.CharField(
|
|
max_length=255, blank=True, null=True, deduplication_field=True
|
|
)
|
|
pages = fields.IntegerField(blank=True, null=True)
|
|
physical_format = fields.CharField(
|
|
max_length=255, choices=FormatChoices, null=True, blank=True
|
|
)
|
|
physical_format_detail = fields.CharField(max_length=255, blank=True, null=True)
|
|
publishers = fields.ArrayField(
|
|
models.CharField(max_length=255), blank=True, default=list
|
|
)
|
|
shelves = models.ManyToManyField(
|
|
"Shelf",
|
|
symmetrical=False,
|
|
through="ShelfBook",
|
|
through_fields=("book", "shelf"),
|
|
)
|
|
parent_work = fields.ForeignKey(
|
|
"Work",
|
|
on_delete=models.PROTECT,
|
|
null=True,
|
|
related_name="editions",
|
|
activitypub_field="work",
|
|
)
|
|
edition_rank = fields.IntegerField(default=0)
|
|
|
|
activity_serializer = activitypub.Edition
|
|
name_field = "title"
|
|
|
|
def get_rank(self):
|
|
"""calculate how complete the data is on this edition"""
|
|
rank = 0
|
|
# big ups for havinga cover
|
|
rank += int(bool(self.cover)) * 3
|
|
# is it in the instance's preferred language?
|
|
rank += int(bool(DEFAULT_LANGUAGE in self.languages))
|
|
# prefer print editions
|
|
if self.physical_format:
|
|
rank += int(
|
|
bool(self.physical_format.lower() in ["paperback", "hardcover"])
|
|
)
|
|
|
|
# does it have metadata?
|
|
rank += int(bool(self.isbn_13))
|
|
rank += int(bool(self.isbn_10))
|
|
rank += int(bool(self.oclc_number))
|
|
rank += int(bool(self.pages))
|
|
rank += int(bool(self.physical_format))
|
|
rank += int(bool(self.description))
|
|
# max rank is 9
|
|
return rank
|
|
|
|
def save(self, *args, **kwargs):
|
|
"""set some fields on the edition object"""
|
|
# calculate isbn 10/13
|
|
if self.isbn_13 and self.isbn_13[:3] == "978" and not self.isbn_10:
|
|
self.isbn_10 = isbn_13_to_10(self.isbn_13)
|
|
if self.isbn_10 and not self.isbn_13:
|
|
self.isbn_13 = isbn_10_to_13(self.isbn_10)
|
|
|
|
# normalize isbn format
|
|
if self.isbn_10:
|
|
self.isbn_10 = re.sub(r"[^0-9X]", "", self.isbn_10)
|
|
if self.isbn_13:
|
|
self.isbn_13 = re.sub(r"[^0-9X]", "", self.isbn_13)
|
|
|
|
# set rank
|
|
self.edition_rank = self.get_rank()
|
|
|
|
return super().save(*args, **kwargs)
|
|
|
|
@classmethod
|
|
def viewer_aware_objects(cls, viewer):
|
|
"""annotate a book query with metadata related to the user"""
|
|
queryset = cls.objects
|
|
if not viewer or not viewer.is_authenticated:
|
|
return queryset
|
|
|
|
queryset = queryset.prefetch_related(
|
|
Prefetch(
|
|
"shelfbook_set",
|
|
queryset=viewer.shelfbook_set.all(),
|
|
to_attr="current_shelves",
|
|
),
|
|
Prefetch(
|
|
"readthrough_set",
|
|
queryset=viewer.readthrough_set.filter(is_active=True).all(),
|
|
to_attr="active_readthroughs",
|
|
),
|
|
)
|
|
return queryset
|
|
|
|
|
|
def isbn_10_to_13(isbn_10):
|
|
"""convert an isbn 10 into an isbn 13"""
|
|
isbn_10 = re.sub(r"[^0-9X]", "", isbn_10)
|
|
# drop the last character of the isbn 10 number (the original checkdigit)
|
|
converted = isbn_10[:9]
|
|
# add "978" to the front
|
|
converted = "978" + converted
|
|
# add a check digit to the end
|
|
# multiply the odd digits by 1 and the even digits by 3 and sum them
|
|
try:
|
|
checksum = sum(int(i) for i in converted[::2]) + sum(
|
|
int(i) * 3 for i in converted[1::2]
|
|
)
|
|
except ValueError:
|
|
return None
|
|
# add the checksum mod 10 to the end
|
|
checkdigit = checksum % 10
|
|
if checkdigit != 0:
|
|
checkdigit = 10 - checkdigit
|
|
return converted + str(checkdigit)
|
|
|
|
|
|
def isbn_13_to_10(isbn_13):
|
|
"""convert isbn 13 to 10, if possible"""
|
|
if isbn_13[:3] != "978":
|
|
return None
|
|
|
|
isbn_13 = re.sub(r"[^0-9X]", "", isbn_13)
|
|
|
|
# remove '978' and old checkdigit
|
|
converted = isbn_13[3:-1]
|
|
# calculate checkdigit
|
|
# multiple each digit by 10,9,8.. successively and sum them
|
|
try:
|
|
checksum = sum(int(d) * (10 - idx) for (idx, d) in enumerate(converted))
|
|
except ValueError:
|
|
return None
|
|
checkdigit = checksum % 11
|
|
checkdigit = 11 - checkdigit
|
|
if checkdigit == 10:
|
|
checkdigit = "X"
|
|
return converted + str(checkdigit)
|
|
|
|
|
|
# pylint: disable=unused-argument
|
|
@receiver(models.signals.post_save, sender=Edition)
|
|
def preview_image(instance, *args, **kwargs):
|
|
"""create preview image on book create"""
|
|
if not ENABLE_PREVIEW_IMAGES:
|
|
return
|
|
changed_fields = {}
|
|
if instance.field_tracker:
|
|
changed_fields = instance.field_tracker.changed()
|
|
|
|
if len(changed_fields) > 0:
|
|
transaction.on_commit(
|
|
lambda: generate_edition_preview_image_task.delay(instance.id)
|
|
)
|