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110 lines
3.4 KiB
Python
110 lines
3.4 KiB
Python
''' activitystream api and books '''
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from django.core.exceptions import ObjectDoesNotExist
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from django.core.files.base import ContentFile
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import re
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import requests
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from fedireads.models import Author, Book
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from fedireads.settings import OL_URL
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def book_search(query):
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''' look up a book '''
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response = requests.get('%s/search.json' % OL_URL, params={'q': query})
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if not response.ok:
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response.raise_for_status()
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data = response.json()
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results = []
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for doc in data['docs'][:5]:
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key = doc['key']
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key = key.split('/')[-1]
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author = doc.get('author_name') or ['Unknown']
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results.append({
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'title': doc.get('title'),
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'olkey': key,
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'year': doc.get('first_publish_year'),
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'author': author[0],
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})
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return results
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def get_or_create_book(olkey, user=None, update=False):
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''' add a book by looking up its open library "work" key. I'm conflating
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"book" and "work" here a bit; the table is called "book" in fedireads, but
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in open library parlance, it's a "work," which is the canonical umbrella
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item that contains all the editions ("book"s) '''
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# check if this is in the format of an OL book identifier
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if not re.match(r'^OL\d+W$', olkey):
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raise ValueError('Invalid OpenLibrary work ID')
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# get the existing entry from our db, if it exists
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try:
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book = Book.objects.get(openlibrary_key=olkey)
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if not update:
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return book
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# we have the book, but still want to update it from OL
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except ObjectDoesNotExist:
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# no book was found, so we start creating a new one
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book = Book(openlibrary_key=olkey)
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# load the book json from openlibrary.org
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response = requests.get('%s/works/%s.json' % (OL_URL, olkey))
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if not response.ok:
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response.raise_for_status()
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data = response.json()
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book.data = data
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if user and user.is_authenticated:
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book.added_by = user
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# great, we can update our book.
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book.save()
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# we also need to know the author get the cover
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for author_blob in data['authors']:
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# this id starts as "/authors/OL1234567A" and we want just "OL1234567A"
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author_id = author_blob['author']['key']
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author_id = author_id.split('/')[-1]
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book.authors.add(get_or_create_author(author_id))
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if data.get('covers') and len(data['covers']):
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book.cover.save(*get_cover(data['covers'][0]), save=True)
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return book
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def get_cover(cover_id):
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''' ask openlibrary for the cover '''
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# TODO: get medium and small versions
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image_name = '%s-M.jpg' % cover_id
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url = 'https://covers.openlibrary.org/b/id/%s' % image_name
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response = requests.get(url)
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if not response.ok:
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response.raise_for_status()
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image_content = ContentFile(requests.get(url).content)
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return [image_name, image_content]
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def get_or_create_author(olkey, update=False):
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''' load that author '''
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if not re.match(r'^OL\d+A$', olkey):
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raise ValueError('Invalid OpenLibrary author ID')
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try:
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author = Author.objects.get(openlibrary_key=olkey)
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if not update:
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return author
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except ObjectDoesNotExist:
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pass
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response = requests.get('%s/authors/%s.json' % (OL_URL, olkey))
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if not response.ok:
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response.raise_for_status()
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data = response.json()
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author = Author(openlibrary_key=olkey, data=data)
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author.save()
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return author
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