moviewyrm/fedireads/connectors/openlibrary.py
2020-03-07 12:22:28 -08:00

138 lines
4.5 KiB
Python

''' openlibrary data connector '''
from django.core.exceptions import ObjectDoesNotExist
from django.core.files.base import ContentFile
import re
import requests
from fedireads import models
from .abstract_connector import AbstractConnector, SearchResult
class OpenLibraryConnector(AbstractConnector):
''' instantiate a connector for OL '''
def __init__(self):
super().__init__('openlibrary')
def search(self, query):
''' query openlibrary search '''
resp = requests.get('%s/search.json' % self.url, params={'q': query})
if not resp.ok:
resp.raise_for_status()
data = resp.json()
results = []
for doc in data['docs'][:5]:
key = doc['key']
key = key.split('/')[-1]
author = doc.get('author_name') or ['Unknown']
results.append(SearchResult(
doc.get('title'),
key,
author[0],
doc.get('first_publish_year'),
))
return results
def get_or_create_book(self, olkey):
''' pull up a book record by whatever means possible '''
if re.match(r'^OL\d+W$', olkey):
model = models.Work
elif re.match(r'^OL\d+M$', olkey):
model = models.Edition
else:
raise ValueError('Invalid OpenLibrary ID')
try:
book = models.Book.objects.get(openlibrary_key=olkey)
return book
except ObjectDoesNotExist:
# no book was found, so we start creating a new one
book = model(openlibrary_key=olkey)
# load the book json from openlibrary.org
response = requests.get('%s/works/%s.json' % (self.url, olkey))
if not response.ok:
response.raise_for_status()
data = response.json()
# great, we can update our book.
book.title = data['title']
description = data.get('description')
if description:
if isinstance(description, dict):
description = description.get('value')
book.description = description
book.pages = data.get('pages')
#book.published_date = data.get('publish_date')
# this book sure as heck better be an edition
if data.get('works'):
key = data.get('works')[0]['key']
key = key.split('/')[-1]
work = self.get_or_create_book(key)
book.parent_work = work
book.save()
# we also need to know the author get the cover
for author_blob in data.get('authors'):
# this id is "/authors/OL1234567A" and we want just "OL1234567A"
author_blob = author_blob.get('author', author_blob)
author_id = author_blob['key']
author_id = author_id.split('/')[-1]
book.authors.add(self.get_or_create_author(author_id))
if data.get('covers') and len(data['covers']):
book.cover.save(*self.get_cover(data['covers'][0]), save=True)
return book
def get_or_create_author(self, olkey):
''' load that author '''
if not re.match(r'^OL\d+A$', olkey):
raise ValueError('Invalid OpenLibrary author ID')
try:
author = models.Author.objects.get(openlibrary_key=olkey)
except ObjectDoesNotExist:
pass
response = requests.get('%s/authors/%s.json' % (self.url, olkey))
if not response.ok:
response.raise_for_status()
data = response.json()
author = models.Author(openlibrary_key=olkey)
bio = data.get('bio')
if bio:
if isinstance(bio, dict):
bio = bio.get('value')
author.bio = bio
name = data['name']
author.name = name
# TODO this is making some BOLD assumption
author.last_name = name.split(' ')[-1]
author.first_name = ' '.join(name.split(' ')[:-1])
#author.born = data.get('birth_date')
#author.died = data.get('death_date')
author.save()
return author
def get_cover(self, cover_id):
''' ask openlibrary for the cover '''
# TODO: get medium and small versions
image_name = '%s-M.jpg' % cover_id
url = '%s/b/id/%s' % (self.covers_url, image_name)
response = requests.get(url)
if not response.ok:
response.raise_for_status()
image_content = ContentFile(requests.get(url).content)
return [image_name, image_content]
def update_book(self, book_obj):
pass