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regluit/core/bookloader.py

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"""
external library imports
"""
import json
import logging
import requests
from datetime import timedelta
from itertools import izip, islice
from xml.etree import ElementTree
from urlparse import urljoin
"""
django imports
"""
from django.conf import settings
from django.contrib.comments.models import Comment
from django.db import IntegrityError
from django.db.models import Q
from gitenberg.metadata.pandata import Pandata
from ..marc.models import inverse_marc_rels
"""
regluit imports
"""
import regluit
import regluit.core.isbn
from regluit.core import models
from regluit.utils.localdatetime import now
import regluit.core.cc as cc
logger = logging.getLogger(__name__)
request_log = logging.getLogger("requests")
request_log.setLevel(logging.WARNING)
def add_by_oclc(isbn, work=None):
# this is indirection in case we have a data source other than google
return add_by_oclc_from_google(isbn)
def add_by_oclc_from_google(oclc):
if oclc:
logger.info("adding book by oclc %s" , oclc)
else:
return None
try:
return models.Identifier.objects.get(type='oclc', value=oclc).edition
except:
url = "https://www.googleapis.com/books/v1/volumes"
try:
results = _get_json(url, {"q": '"OCLC%s"' % oclc})
except LookupFailure, e:
logger.exception("lookup failure for %s", oclc)
return None
if not results.has_key('items') or len(results['items']) == 0:
logger.warn("no google hits for %s" , oclc)
return None
try:
e = add_by_googlebooks_id(results['items'][0]['id'], results=results['items'][0])
models.Identifier(type='oclc', value=oclc, edition=e, work=e.work).save()
return e
except LookupFailure, e:
logger.exception("failed to add edition for %s", oclc)
except IntegrityError, e:
logger.exception("google books data for %s didn't fit our db", oclc)
return None
def add_by_isbn(isbn, work=None):
if not isbn:
return None
try:
e = add_by_isbn_from_google(isbn, work=work)
except LookupFailure:
logger.exception("failed google lookup for %s", isbn)
# try again some other time
return None
if e:
return e
logger.info("null came back from add_by_isbn_from_google: %s", isbn)
if not work or not work.title:
return None
# if there's a work with a title, we want to create stub editions and
# works, even if google doesn't know about it # but if it's not valid,
# forget it!
try:
isbn = regluit.core.isbn.ISBN(isbn)
except:
logger.exception("invalid isbn: %s", isbn)
return None
if not isbn.valid:
return None
isbn = isbn.to_string()
# we don't know the language ->'xx'
w = models.Work(title=work.title, language='xx')
w.save()
e = models.Edition(title=work.title,work=w)
e.save()
e.new = True
models.Identifier(type='isbn', value=isbn, work=w, edition=e).save()
return e
def get_google_isbn_results(isbn):
url = "https://www.googleapis.com/books/v1/volumes"
try:
results = _get_json(url, {"q": "isbn:%s" % isbn})
except LookupFailure:
logger.exception("lookup failure for %s", isbn)
return None
if not results.has_key('items') or len(results['items']) == 0:
logger.warn("no google hits for %s" , isbn)
return None
else:
return results
def add_ebooks(item, edition):
access_info = item.get('accessInfo')
if access_info:
epub = access_info.get('epub')
if epub and epub.get('downloadLink'):
ebook = models.Ebook(edition=edition, format='epub',
url=epub.get('downloadLink'),
provider='Google Books')
try:
ebook.save()
except IntegrityError:
pass
pdf = access_info.get('pdf')
if pdf and pdf.get('downloadLink'):
ebook = models.Ebook(edition=edition, format='pdf',
url=pdf.get('downloadLink', None),
provider='Google Books')
try:
ebook.save()
except IntegrityError:
pass
def update_edition(edition):
"""
attempt to update data associated with input edition and return that updated edition
"""
# if there is no ISBN associated with edition, just return the input edition
try:
isbn=edition.identifiers.filter(type='isbn')[0].value
except (models.Identifier.DoesNotExist, IndexError):
return edition
# do a Google Books lookup on the isbn associated with the edition (there should be either 0 or 1 isbns associated
# with an edition because of integrity constraint in Identifier)
# if we get some data about this isbn back from Google, update the edition data accordingly
results=get_google_isbn_results(isbn)
if not results:
return edition
item=results['items'][0]
googlebooks_id=item['id']
d = item['volumeInfo']
if d.has_key('title'):
title = d['title']
else:
title=''
if len(title)==0:
# need a title to make an edition record; some crap records in GB. use title from parent if available
title=edition.work.title
# check for language change
language = d['language']
# allow variants in main language (e.g., 'zh-tw')
if len(language)>5:
language= language[0:5]
# if the language of the edition no longer matches that of the parent work, attach edition to the
if edition.work.language != language:
logger.info("reconnecting %s since it is %s instead of %s" %(googlebooks_id, language, edition.work.language))
old_work=edition.work
new_work = models.Work(title=title, language=language)
new_work.save()
edition.work = new_work
edition.save()
for identifier in edition.identifiers.all():
logger.info("moving identifier %s" % identifier.value)
identifier.work=new_work
identifier.save()
if old_work and old_work.editions.count()==0:
#a dangling work; make sure nothing else is attached!
merge_works(new_work,old_work)
# update the edition
edition.title = title
edition.publication_date = d.get('publishedDate', '')
edition.set_publisher(d.get('publisher'))
edition.save()
# create identifier if needed
models.Identifier.get_or_add(type='goog',value=googlebooks_id,edition=edition,work=edition.work)
for a in d.get('authors', []):
edition.add_author(a)
add_ebooks(item, edition)
return edition
def add_by_isbn_from_google(isbn, work=None):
"""add a book to the UnglueIt database from google based on ISBN. The work parameter
is optional, and if not supplied the edition will be associated with
a stub work.
"""
if not isbn:
return None
if len(isbn)==10:
isbn = regluit.core.isbn.convert_10_to_13(isbn)
# check if we already have this isbn
edition = get_edition_by_id(type='isbn',value=isbn)
if edition:
edition.new = False
return edition
logger.info("adding new book by isbn %s", isbn)
results=get_google_isbn_results(isbn)
if results:
try:
return add_by_googlebooks_id(results['items'][0]['id'], work=work, results=results['items'][0], isbn=isbn)
except LookupFailure, e:
logger.exception("failed to add edition for %s", isbn)
except IntegrityError, e:
logger.exception("google books data for %s didn't fit our db", isbn)
return None
else:
return None
def get_work_by_id(type,value):
if value:
try:
return models.Identifier.objects.get(type=type,value=value).work
except models.Identifier.DoesNotExist:
return None
def get_edition_by_id(type,value):
if value:
try:
return models.Identifier.objects.get(type=type,value=value).edition
except models.Identifier.DoesNotExist:
return None
def add_by_googlebooks_id(googlebooks_id, work=None, results=None, isbn=None):
"""add a book to the UnglueIt database based on the GoogleBooks ID. The
work parameter is optional, and if not supplied the edition will be
associated with a stub work. isbn can be passed because sometimes passed data won't include it
"""
# don't ping google again if we already know about the edition
try:
edition = models.Identifier.objects.get(type='goog', value=googlebooks_id).edition
edition.new = False
return edition
except models.Identifier.DoesNotExist:
pass
# if google has been queried by caller, don't call again
if results:
item =results
else:
logger.info("loading metadata from google for %s", googlebooks_id)
url = "https://www.googleapis.com/books/v1/volumes/%s" % googlebooks_id
item = _get_json(url)
d = item['volumeInfo']
if d.has_key('title'):
title = d['title']
else:
title=''
if len(title)==0:
# need a title to make an edition record; some crap records in GB. use title from parent if available
if work:
title=work.title
else:
return None
# don't add the edition to a work with a different language
# https://www.pivotaltracker.com/story/show/17234433
language = d['language']
if len(language)>5:
language= language[0:5]
if work and work.language != language:
logger.info("not connecting %s since it is %s instead of %s" %
(googlebooks_id, language, work.language))
work = None
# isbn = None
if not isbn:
for i in d.get('industryIdentifiers', []):
if i['type'] == 'ISBN_10' and not isbn:
isbn = regluit.core.isbn.convert_10_to_13(i['identifier'])
elif i['type'] == 'ISBN_13':
isbn = i['identifier']
# now check to see if there's an existing Work
if work:
work.new = False
if isbn and not work:
work = get_work_by_id(type='isbn',value=isbn)
if work:
work.new = False
if not work:
work = models.Work.objects.create(title=title, language=language)
work.new = True
work.save()
# going off to google can take some time, so we want to make sure this edition has not
# been created in another thread while we were waiting
try:
e = models.Identifier.objects.get(type='goog', value=googlebooks_id).edition
e.new = False
# whoa nellie, somebody else created an edition while we were working.
if work.new:
work.delete()
return e
except models.Identifier.DoesNotExist:
pass
# because this is a new google id, we have to create a new edition
e = models.Edition(work=work)
e.title = title
e.publication_date = d.get('publishedDate', '')
e.set_publisher(d.get('publisher'))
e.save()
e.new = True
# create identifier where needed
models.Identifier(type='goog',value=googlebooks_id,edition=e,work=work).save()
if isbn:
models.Identifier.get_or_add(type='isbn',value=isbn,edition=e,work=work)
for a in d.get('authors', []):
a, created = models.Author.objects.get_or_create(name=a)
e.add_author(a)
add_ebooks(item, e)
return e
def relate_isbn(isbn, cluster_size=1):
"""add a book by isbn and then see if there's an existing work to add it to so as to make a cluster
bigger than cluster_size.
"""
logger.info("finding a related work for %s", isbn)
edition = add_by_isbn(isbn)
if edition is None:
return None
if edition.work is None:
logger.info("didn't add related to null work")
return None
if edition.work.editions.count()>cluster_size:
return edition.work
for other_isbn in thingisbn(isbn):
# 979's come back as 13
logger.debug("other_isbn: %s", other_isbn)
if len(other_isbn)==10:
other_isbn = regluit.core.isbn.convert_10_to_13(other_isbn)
related_edition = add_by_isbn(other_isbn, work=edition.work)
if related_edition:
related_language = related_edition.work.language
if edition.work.language == related_language:
if related_edition.work is None:
related_edition.work = edition.work
related_edition.save()
elif related_edition.work.id != edition.work.id:
logger.debug("merge_works path 1 %s %s", edition.work.id, related_edition.work.id )
merge_works(related_edition.work, edition.work)
if related_edition.work.editions.count()>cluster_size:
return related_edition.work
return edition.work
def add_related(isbn):
"""add all books related to a particular ISBN to the UnglueIt database.
The initial seed ISBN will be added if it's not already there.
"""
# make sure the seed edition is there
logger.info("adding related editions for %s", isbn)
new_editions = []
edition = add_by_isbn(isbn)
if edition is None:
return new_editions
if edition.work is None:
logger.warning("didn't add related to null work")
return new_editions
# this is the work everything will hang off
work = edition.work
other_editions = {}
for other_isbn in thingisbn(isbn):
# 979's come back as 13
logger.debug("other_isbn: %s", other_isbn)
if len(other_isbn)==10:
other_isbn = regluit.core.isbn.convert_10_to_13(other_isbn)
related_edition = add_by_isbn(other_isbn, work=work)
if related_edition:
related_language = related_edition.work.language
if edition.work.language == related_language:
new_editions.append(related_edition)
if related_edition.work is None:
related_edition.work = work
related_edition.save()
elif related_edition.work.id != work.id:
logger.debug("merge_works path 1 %s %s", work.id, related_edition.work.id )
merge_works(work, related_edition.work)
else:
if other_editions.has_key(related_language):
other_editions[related_language].append(related_edition)
else:
other_editions[related_language]=[related_edition]
# group the other language editions together
for lang_group in other_editions.itervalues():
logger.debug("lang_group (ed, work): %s", [(ed.id, ed.work.id) for ed in lang_group])
if len(lang_group)>1:
lang_edition = lang_group[0]
logger.debug("lang_edition.id: %s", lang_edition.id)
# compute the distinct set of works to merge into lang_edition.work
works_to_merge = set([ed.work for ed in lang_group[1:]]) - set([lang_edition.work])
for w in works_to_merge:
logger.debug("merge_works path 2 %s %s", lang_edition.work.id, w.id )
merge_works(lang_edition.work, w)
return new_editions
def thingisbn(isbn):
"""given an ISBN return a list of related edition ISBNs, according to
Library Thing. (takes isbn_10 or isbn_13, returns isbn_10, except for 979 isbns, which come back as isbn_13')
"""
logger.info("looking up %s at ThingISBN" , isbn)
url = "http://www.librarything.com/api/thingISBN/%s" % isbn
xml = requests.get(url, headers={"User-Agent": settings.USER_AGENT}).content
doc = ElementTree.fromstring(xml)
return [e.text for e in doc.findall('isbn')]
def merge_works(w1, w2, user=None):
"""will merge the second work (w2) into the first (w1)
"""
logger.info("merging work %s into %s", w2.id, w1.id)
# don't merge if the works are the same or at least one of the works has no id (for example, when w2 has already been deleted)
if w1 is None or w2 is None or w1.id == w2.id or w1.id is None or w2.id is None:
return
if w2.selected_edition != None and w1.selected_edition == None:
#the merge should be reversed
temp = w1
w1 = w2
w2 = temp
models.WasWork(was=w2.pk, work=w1, user=user).save()
for ww in models.WasWork.objects.filter(work = w2):
ww.work = w1
ww.save()
if w2.description and not w1.description:
w1.description = w2.description
if w2.featured and not w1.featured:
w1.featured = w2.featured
if w2.is_free and not w1.is_free:
w1.is_free = True
w1.save()
for wishlist in models.Wishlist.objects.filter(works__in=[w2]):
w2source = wishlist.work_source(w2)
wishlist.remove_work(w2)
wishlist.add_work(w1, w2source)
for identifier in w2.identifiers.all():
identifier.work = w1
identifier.save()
for comment in Comment.objects.for_model(w2):
comment.object_pk = w1.pk
comment.save()
for edition in w2.editions.all():
edition.work = w1
edition.save()
for campaign in w2.campaigns.all():
campaign.work = w1
campaign.save()
for claim in w2.claim.all():
claim.work = w1
claim.dont_notify = True
claim.save()
for offer in w2.offers.all():
offer.work = w1
offer.save()
for acq in w2.acqs.all():
acq.work = w1
acq.save()
for hold in w2.holds.all():
hold.work = w1
hold.save()
for subject in w2.subjects.all():
if subject not in w1.subjects.all():
w1.subjects.add(subject)
w2.delete()
def detach_edition(e):
"""will detach edition from its work, creating a new stub work. if remerge=true, will see if there's another work to attach to
"""
logger.info("splitting edition %s from %s", e, e.work)
w = models.Work(title=e.title, language = e.work.language)
w.save()
for identifier in e.identifiers.all():
identifier.work = w
identifier.save()
e.work = w
e.save()
def despam_description(description):
""" a lot of descriptions from openlibrary have free-book promotion text; this removes some of it."""
if description.find("GeneralBooksClub.com")>-1 or description.find("AkashaPublishing.Com")>-1:
return ""
pieces=description.split("1stWorldLibrary.ORG -")
if len(pieces)>1:
return pieces[1]
pieces=description.split("a million books for free.")
if len(pieces)>1:
return pieces[1]
return description
def add_openlibrary(work, hard_refresh = False):
if (not hard_refresh) and work.openlibrary_lookup is not None:
# don't hit OL if we've visited in the past month or so
if now()- work.openlibrary_lookup < timedelta(days=30):
return
work.openlibrary_lookup = now()
work.save()
# find the first ISBN match in OpenLibrary
logger.info("looking up openlibrary data for work %s", work.id)
found = False
e = None # openlibrary edition json
w = None # openlibrary work json
# get the 1st openlibrary match by isbn that has an associated work
url = "http://openlibrary.org/api/books"
params = {"format": "json", "jscmd": "details"}
subjects = []
for edition in work.editions.all():
isbn_key = "ISBN:%s" % edition.isbn_13
params['bibkeys'] = isbn_key
try:
e = _get_json(url, params, type='ol')
except LookupFailure:
logger.exception("OL lookup failed for %s", isbn_key)
e = {}
if e.has_key(isbn_key):
if e[isbn_key].has_key('details'):
if e[isbn_key]['details'].has_key('oclc_numbers'):
for oclcnum in e[isbn_key]['details']['oclc_numbers']:
models.Identifier.get_or_add(type='oclc',value=oclcnum,work=work, edition=edition)
if e[isbn_key]['details'].has_key('identifiers'):
ids = e[isbn_key]['details']['identifiers']
if ids.has_key('goodreads'):
models.Identifier.get_or_add(type='gdrd',value=ids['goodreads'][0],work=work,edition=edition)
if ids.has_key('librarything'):
models.Identifier.get_or_add(type='ltwk',value=ids['librarything'][0],work=work)
if ids.has_key('google'):
models.Identifier.get_or_add(type='goog',value=ids['google'][0],work=work)
if ids.has_key('project_gutenberg'):
models.Identifier.get_or_add(type='gute',value=ids['project_gutenberg'][0],work=work)
if e[isbn_key]['details'].has_key('works'):
work_key = e[isbn_key]['details']['works'].pop(0)['key']
logger.info("got openlibrary work %s for isbn %s", work_key, isbn_key)
models.Identifier.get_or_add(type='olwk',value=work_key,work=work)
try:
w = _get_json("http://openlibrary.org" + work_key,type='ol')
if w.has_key('description'):
description=w['description']
if isinstance(description,dict):
if description.has_key('value'):
description=description['value']
description=despam_description(description)
if not work.description or work.description.startswith('{') or len(description) > len(work.description):
work.description = description
work.save()
if w.has_key('subjects') and len(w['subjects']) > len(subjects):
subjects = w['subjects']
except LookupFailure:
logger.exception("OL lookup failed for %s", work_key)
if not subjects:
logger.warn("unable to find work %s at openlibrary", work.id)
return
# add the subjects to the Work
for s in subjects:
if valid_subject(s):
logger.info("adding subject %s to work %s", s, work.id)
subject, created = models.Subject.objects.get_or_create(name=s)
work.subjects.add(subject)
work.save()
def valid_xml_char_ordinal(c):
codepoint = ord(c)
# conditions ordered by presumed frequency
return (
0x20 <= codepoint <= 0xD7FF or
codepoint in (0x9, 0xA, 0xD) or
0xE000 <= codepoint <= 0xFFFD or
0x10000 <= codepoint <= 0x10FFFF
)
def valid_subject( subject_name ):
num_commas = 0
for c in subject_name:
if not valid_xml_char_ordinal(c):
return False
if c == ',':
num_commas += 1
if num_commas > 2:
return False
return True
def _get_json(url, params={}, type='gb'):
# TODO: should X-Forwarded-For change based on the request from client?
headers = {'User-Agent': settings.USER_AGENT,
'Accept': 'application/json',
'X-Forwarded-For': '69.174.114.214'}
if type == 'gb':
params['key'] = settings.GOOGLE_BOOKS_API_KEY
params['country'] = 'us'
response = requests.get(url, params=params, headers=headers)
if response.status_code == 200:
return json.loads(response.content)
else:
logger.error("unexpected HTTP response: %s" % response)
if response.content:
logger.error("response content: %s" % response.content)
raise LookupFailure("GET failed: url=%s and params=%s" % (url, params))
def load_gutenberg_edition(title, gutenberg_etext_id, ol_work_id, seed_isbn, url, format, license, lang, publication_date):
# let's start with instantiating the relevant Work and Edition if they don't already exist
try:
work = models.Identifier.objects.get(type='olwk',value=ol_work_id).work
except models.Identifier.DoesNotExist: # try to find an Edition with the seed_isbn and use that work to hang off of
sister_edition = add_by_isbn(seed_isbn)
if sister_edition.new:
# add related editions asynchronously
regluit.core.tasks.populate_edition.delay(sister_edition.isbn_13)
work = sister_edition.work
# attach the olwk identifier to this work if it's not none.
if ol_work_id is not None:
work_id = models.Identifier.get_or_add(type='olwk',value=ol_work_id, work=work)
# Now pull out any existing Gutenberg editions tied to the work with the proper Gutenberg ID
try:
edition = models.Identifier.objects.get( type='gtbg', value=gutenberg_etext_id ).edition
except models.Identifier.DoesNotExist:
edition = models.Edition()
edition.title = title
edition.work = work
edition.save()
edition_id = models.Identifier.get_or_add(type='gtbg',value=gutenberg_etext_id, edition=edition, work=work)
# check to see whether the Edition hasn't already been loaded first
# search by url
ebooks = models.Ebook.objects.filter(url=url)
# format: what's the controlled vocab? -- from Google -- alternative would be mimetype
if len(ebooks):
ebook = ebooks[0]
elif len(ebooks) == 0: # need to create new ebook
ebook = models.Ebook()
if len(ebooks) > 1:
warnings.warn("There is more than one Ebook matching url {0}".format(url))
ebook.format = format
ebook.provider = 'Project Gutenberg'
ebook.url = url
ebook.rights = license
# is an Ebook instantiable without a corresponding Edition? (No, I think)
ebook.edition = edition
ebook.save()
return ebook
def add_missing_isbn_to_editions(max_num=None, confirm=False):
"""For each of the editions with Google Books ids, do a lookup and attach ISBNs. Set confirm to True to check db changes made correctly"""
logger.info("Number of editions with Google Books IDs but not ISBNs (before): %d",
models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count())
from regluit.experimental import bookdata
gb = bookdata.GoogleBooks(key=settings.GOOGLE_BOOKS_API_KEY)
new_isbns = []
google_id_not_found = []
no_isbn_found = []
editions_to_merge = []
exceptions = []
for (i, ed) in enumerate(islice(models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn'), max_num)):
try:
g_id = ed.identifiers.get(type='goog').value
except Exception, e:
# we might get an exception if there is, for example, more than one Google id attached to this Edition
logger.exception("add_missing_isbn_to_editions for edition.id %s: %s", ed.id, e)
exceptions.append((ed.id, e))
continue
# try to get ISBN from Google Books
try:
vol_id = gb.volumeid(g_id)
if vol_id is None:
google_id_not_found.append((ed.id, g_id))
logger.debug("g_id not found: %s", g_id)
else:
isbn = vol_id.get('isbn')
logger.info("g_id, isbn: %s %s", g_id, isbn)
if isbn is not None:
# check to see whether the isbn is actually already in the db but attached to another Edition
existing_isbn_ids = models.Identifier.objects.filter(type='isbn', value=isbn)
if len(existing_isbn_ids):
# don't try to merge editions right now, just note the need to merge
ed2 = existing_isbn_ids[0].edition
editions_to_merge.append((ed.id, g_id, isbn, ed2.id))
else:
new_id = models.Identifier(type='isbn', value=isbn, edition=ed, work=ed.work)
new_id.save()
new_isbns.append((ed.id, g_id, isbn))
else:
no_isbn_found.append((ed.id, g_id, None))
except Exception, e:
logger.exception("add_missing_isbn_to_editions for edition.id %s: %s", ed.id, e)
exceptions.append((ed.id, g_id, None, e))
logger.info("Number of editions with Google Books IDs but not ISBNs (after): %d",
models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count())
ok = None
if confirm:
ok = True
for (ed_id, g_id, isbn) in new_isbns:
if models.Edition.objects.get(id=ed_id).identifiers.get(type='isbn').value != isbn:
ok = False
break
return {
'new_isbns': new_isbns,
'no_isbn_found': no_isbn_found,
'editions_to_merge': editions_to_merge,
'exceptions': exceptions,
'google_id_not_found': google_id_not_found,
'confirm': ok
}
class LookupFailure(Exception):
pass
IDTABLE = [('librarything','ltwk'),('goodreads','gdrd'),('openlibrary','olwk'),('gutenberg','gtbg'),('isbn','isbn'),('oclc','oclc'), ]
def load_from_yaml(yaml_url):
metadata = Pandata(yaml_url)
#find an work to associate
work = edition = None
if metadata.url:
new_ids = [('http','http', metadata.url)]
else:
new_ids = []
for (identifier, id_code) in IDTABLE:
value = metadata.identifiers.get(identifier,None)
if value:
value = value[0] if isinstance(value, list) else value
try:
id = models.Identifier.objects.get(type=id_code, value=value)
work = id.work
if id.edition and not edition:
edition = id.edition
except models.Identifier.DoesNotExist:
new_ids.append((identifier, id_code, value))
if not work:
work = models.Work.objects.create(title=metadata.title, language=metadata.language)
if not edition:
edition = models.Edition.objects.create(title=metadata.title, work=work)
for (identifier, id_code, value) in new_ids:
models.Identifier.set(type=id_code, value=value, edition=edition if id_code in ('isbn', 'oclc') else None, work=work)
if metadata.publisher: #always believe yaml
edition.set_publisher(metadata.publisher)
if metadata.publication_date: #always believe yaml
edition.publication_date = metadata.publication_date
if metadata.description and len(metadata.description)>len(work.description): #be careful about overwriting the work description
work.description = metadata.description
if metadata.creator: #always believe yaml
edition.authors.clear()
for key in metadata.creator.keys():
creators=metadata.creator[key]
rel_code=inverse_marc_rels.get(key,'aut')
creators = creators if isinstance(creators,list) else [creators]
for creator in creators:
edition.add_author(creator.get('agent_name',''),relation=rel_code)
for yaml_subject in metadata.subjects: #always add yaml subjects (don't clear)
if isinstance(yaml_subject, tuple):
(authority, heading) = yaml_subject
elif isinstance(yaml_subject, str):
(authority, heading) = ( '', yaml_subject)
else:
continue
(subject, created) = models.Subject.objects.get_or_create(name=heading)
if not subject.authority and authority:
subject.authority = authority
subject.save()
subject.works.add(work)
# the default edition uses the first cover in covers.
for cover in metadata.covers:
if cover.get('image_path', False):
edition.cover_image=urljoin(yaml_url,cover['image_path'])
break
edition.save()
# if there is a version, assume there is an ebook. if not, not.
if metadata._version and not metadata._version.startswith('0.0.'):
#there should be an ebook to link to!
try:
ebook= models.Ebook.objects.create(
url=git_download_from_yaml_url(yaml_url,metadata._version,edition_name=metadata._edition ),
provider='Github',
rights = metadata.rights if metadata.rights in cc.LICENSE_LIST_ALL else None,
format = 'epub',
edition = edition,
# version = metadata._version
)
except IntegrityError:
#duplicate url or url isn't a master
pass
return work.id
def git_download_from_yaml_url(yaml_url, version, edition_name='book'):
# go from https://github.com/GITenberg/Adventures-of-Huckleberry-Finn_76/raw/master/metadata.yaml
# to https://github.com/GITenberg/Adventures-of-Huckleberry-Finn_76/releases/download/v0.0.3/Adventures-of-Huckleberry-Finn.epub
if yaml_url.endswith('raw/master/metadata.yaml'):
repo_url = yaml_url[0:-24]
#print (repo_url,version,edition_name)
ebook_url = repo_url + 'releases/download/' + version + '/' + edition_name + '.epub'
return ebook_url
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