bookwyrm/fedireads/models/book.py
2020-04-22 14:53:22 +01:00

158 lines
6.2 KiB
Python

''' database schema for books and shelves '''
from uuid import uuid4
from django.utils import timezone
from django.db import models
from model_utils.managers import InheritanceManager
from fedireads.settings import DOMAIN
from fedireads.utils.fields import JSONField, ArrayField
from fedireads.utils.models import FedireadsModel
from fedireads.connectors.settings import CONNECTORS
ConnectorFiles = models.TextChoices('ConnectorFiles', CONNECTORS)
class Connector(FedireadsModel):
''' book data source connectors '''
identifier = models.CharField(max_length=255, unique=True)
connector_file = models.CharField(
max_length=255,
default='openlibrary',
choices=ConnectorFiles.choices
)
api_key = models.CharField(max_length=255, null=True)
base_url = models.CharField(max_length=255)
covers_url = models.CharField(max_length=255)
search_url = models.CharField(max_length=255, null=True)
key_name = models.CharField(max_length=255)
politeness_delay = models.IntegerField(null=True) #seconds
max_query_count = models.IntegerField(null=True)
# how many queries executed in a unit of time, like a day
query_count = models.IntegerField(default=0)
# when to reset the query count back to 0 (ie, after 1 day)
query_count_expiry = models.DateTimeField(auto_now_add=True)
class Meta:
constraints = [
models.CheckConstraint(
check=models.Q(connector_file__in=ConnectorFiles),
name='connector_file_valid'
)
]
class Book(FedireadsModel):
''' a generic book, which can mean either an edition or a work '''
# these identifiers apply to both works and editions
fedireads_key = models.CharField(max_length=255, unique=True, default=uuid4)
openlibrary_key = models.CharField(max_length=255, blank=True, null=True)
librarything_key = models.CharField(max_length=255, blank=True, null=True)
goodreads_key = models.CharField(max_length=255, blank=True, null=True)
misc_identifiers = JSONField(null=True)
# info about where the data comes from and where/if to sync
source_url = models.CharField(max_length=255, unique=True, null=True)
sync = models.BooleanField(default=True)
sync_cover = models.BooleanField(default=True)
last_sync_date = models.DateTimeField(default=timezone.now)
connector = models.ForeignKey(
'Connector', on_delete=models.PROTECT, null=True)
# TODO: edit history
# book/work metadata
title = models.CharField(max_length=255)
sort_title = models.CharField(max_length=255, blank=True, null=True)
subtitle = models.CharField(max_length=255, blank=True, null=True)
description = models.TextField(blank=True, null=True)
languages = ArrayField(
models.CharField(max_length=255), blank=True, default=list
)
series = models.CharField(max_length=255, blank=True, null=True)
series_number = models.CharField(max_length=255, blank=True, null=True)
subjects = ArrayField(
models.CharField(max_length=255), blank=True, default=list
)
subject_places = ArrayField(
models.CharField(max_length=255), blank=True, default=list
)
# TODO: include an annotation about the type of authorship (ie, translator)
authors = models.ManyToManyField('Author')
cover = models.ImageField(upload_to='covers/', blank=True, null=True)
first_published_date = models.DateTimeField(blank=True, null=True)
published_date = models.DateTimeField(blank=True, null=True)
objects = InheritanceManager()
@property
def absolute_id(self):
''' constructs the absolute reference to any db object '''
base_path = 'https://%s' % DOMAIN
model_name = type(self).__name__.lower()
return '%s/book/%s' % (base_path, self.openlibrary_key)
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')
super().save(*args, **kwargs)
def __repr__(self):
return "<{} key={!r} title={!r}>".format(
self.__class__,
self.openlibrary_key,
self.title,
)
class Work(Book):
''' a work (an abstract concept of a book that manifests in an edition) '''
# library of congress catalog control number
lccn = models.CharField(max_length=255, blank=True, null=True)
@property
def default_edition(self):
ed = Edition.objects.filter(parent_work=self, default=True).first()
if not ed:
ed = Edition.objects.filter(parent_work=self).first()
return ed
class Edition(Book):
''' an edition of a book '''
default = models.BooleanField(default=False)
# these identifiers only apply to work
isbn = models.CharField(max_length=255, blank=True, null=True)
oclc_number = models.CharField(max_length=255, blank=True, null=True)
pages = models.IntegerField(blank=True, null=True)
physical_format = models.CharField(max_length=255, blank=True, null=True)
publishers = ArrayField(
models.CharField(max_length=255), blank=True, default=list
)
shelves = models.ManyToManyField(
'Shelf',
symmetrical=False,
through='ShelfBook',
through_fields=('book', 'shelf')
)
parent_work = models.ForeignKey('Work', on_delete=models.PROTECT, null=True)
class Author(FedireadsModel):
''' copy of an author from OL '''
fedireads_key = models.CharField(max_length=255, unique=True, default=uuid4)
openlibrary_key = models.CharField(max_length=255, blank=True, null=True)
wikipedia_link = models.CharField(max_length=255, blank=True, null=True)
# idk probably other keys would be useful here?
born = models.DateTimeField(blank=True, null=True)
died = models.DateTimeField(blank=True, null=True)
name = models.CharField(max_length=255)
last_name = models.CharField(max_length=255, blank=True, null=True)
first_name = models.CharField(max_length=255, blank=True, null=True)
aliases = ArrayField(
models.CharField(max_length=255), blank=True, default=list
)
bio = models.TextField(null=True, blank=True)