297 lines
9.7 KiB
Python
297 lines
9.7 KiB
Python
from itertools import islice
|
|
|
|
import datetime
|
|
import urlparse
|
|
from django.core.urlresolvers import reverse
|
|
from django.utils.http import urlquote
|
|
import json
|
|
import pytz
|
|
|
|
import logging
|
|
logger = logging.getLogger(__name__)
|
|
|
|
from regluit.core import models, facets
|
|
import regluit.core.cc as cc
|
|
from .opds import (
|
|
feeds,
|
|
get_facet_class,
|
|
add_query_component,
|
|
Facet,
|
|
get_facet_facet,
|
|
opds_feed_for_work,
|
|
)
|
|
|
|
licenses = cc.LICENSE_LIST
|
|
|
|
FORMAT_TO_MIMETYPE = {'pdf':"application/pdf",
|
|
'epub':"application/epub+zip",
|
|
'mobi':"application/x-mobipocket-ebook",
|
|
'html':"text/html",
|
|
'text':"text/html"}
|
|
|
|
UNGLUEIT_URL= 'https://unglue.it'
|
|
ACQUISITION = "application/opds+json"
|
|
FACET_RELATION = "opds:facet"
|
|
JSONCONTEXT = "http://opds-spec.org/opds.jsonld"
|
|
|
|
def feeds():
|
|
for facet_path in facets.get_all_facets('Format'):
|
|
yield get_facet_facet(facet_path)
|
|
for facet_path in facets.get_all_facets('Keyword'):
|
|
yield get_facet_facet(facet_path)
|
|
|
|
def get_facet_class(name):
|
|
return get_facet_facet(name)
|
|
|
|
def text_node(tag, text):
|
|
return {tag:text}
|
|
|
|
def html_node(tag, html):
|
|
return {tag:html}
|
|
|
|
def isbn_node(isbn):
|
|
return 'urn:ISBN:'+ isbn
|
|
|
|
def work_node(work, facet=None):
|
|
|
|
|
|
metadata = {"@type": "http://schema.org/EBook",
|
|
"id": "{base}{url}".format(
|
|
base=UNGLUEIT_URL,
|
|
url=reverse('work_identifier',
|
|
kwargs={'work_id':work.id})
|
|
)
|
|
}
|
|
links = []
|
|
images = []
|
|
acquires = []
|
|
content = {
|
|
"metadata": metadata,
|
|
"links": links,
|
|
"images": images,
|
|
"acquire": acquires
|
|
}
|
|
# title
|
|
metadata["title"] = work.title
|
|
|
|
# id
|
|
links.append({
|
|
"rel": "self",
|
|
"href": "{base}{url}?work={id}".format(
|
|
base=UNGLUEIT_URL,
|
|
url=reverse('opdsjson_acqusition', args=['all']),
|
|
id=work.id
|
|
),
|
|
"type": "application/opds-publication+json"
|
|
})
|
|
|
|
updated = None
|
|
|
|
# links for all ebooks
|
|
ebooks = facet.filter_model("Ebook",work.ebooks()) if facet else work.ebooks()
|
|
versions = set()
|
|
|
|
for ebook in ebooks:
|
|
if updated is None:
|
|
# most recent ebook, first ebook in loop
|
|
updated = ebook.created.isoformat()
|
|
metadata['updated'] = updated
|
|
if not ebook.version_label in versions:
|
|
versions.add(ebook.version_label)
|
|
# ebook.download_url is an absolute URL with the protocol, domain, and path baked in
|
|
acquire = {
|
|
"rel": "opds:acquisition:open-access",
|
|
"href": add_query_component(ebook.download_url, "feed=opds"),
|
|
"rights": str(ebook.rights)
|
|
}
|
|
if ebook.is_direct():
|
|
acquire["type"] = FORMAT_TO_MIMETYPE.get(ebook.format, "")
|
|
else:
|
|
""" indirect acquisition, i.e. google books """
|
|
acquire["type"] = "text/html"
|
|
acquire["indirectAcquisition"] = {
|
|
"type": FORMAT_TO_MIMETYPE.get(ebook.format)
|
|
}
|
|
if ebook.version_label:
|
|
acquire["version"] = ebook.version_label
|
|
|
|
acquires.append(acquire)
|
|
|
|
# get the cover -- assume jpg?
|
|
if work.cover_image_small():
|
|
cover_node = {
|
|
"href": work.cover_image_small(),
|
|
"type": "image/"+work.cover_filetype(),
|
|
}
|
|
images.append(cover_node)
|
|
if work.cover_image_thumbnail():
|
|
cover_node2 = {
|
|
"href": work.cover_image_thumbnail(),
|
|
"type": "image/"+work.cover_filetype(),
|
|
}
|
|
images.append(cover_node2)
|
|
|
|
|
|
# <dcterms:issued>2012</dcterms:issued>
|
|
metadata["issued"] = work.publication_date
|
|
|
|
# author
|
|
# TO DO: include all authors?
|
|
metadata["author"] = work.author()
|
|
|
|
# publisher
|
|
#<dcterms:publisher>Open Book Publishers</dcterms:publisher>
|
|
if len(work.publishers()):
|
|
metadata["publishers"] = [{"publisher": publisher.name.name}
|
|
for publisher in work.publishers()]
|
|
|
|
# language
|
|
metadata["language"] = work.language
|
|
|
|
# description
|
|
metadata["summary"] = work.description
|
|
|
|
# identifiers
|
|
if work.identifiers.filter(type='isbn'):
|
|
metadata['identifiers'] = [isbn_node(isbn.value)
|
|
for isbn in work.identifiers.filter(type='isbn')[0:9]] #10 should be more than enough
|
|
|
|
|
|
# subject tags
|
|
subjects = [subject.name for subject in work.subjects.all()]
|
|
if subjects:
|
|
metadata["subjects"] = subjects
|
|
|
|
# age level
|
|
# <category term="15-18" scheme="http://schema.org/typicalAgeRange" label="Teen - Grade 10-12, Age 15-18"/>
|
|
if work.age_level:
|
|
age_level_node_attrib = {}
|
|
age_level_node = {"category": age_level_node_attrib}
|
|
age_level_node_attrib["scheme"] = 'http://schema.org/typicalAgeRange'
|
|
age_level_node_attrib["term"] = work.age_level
|
|
age_level_node_attrib["label"] = work.get_age_level_display()
|
|
metadata.update(age_level_node)
|
|
|
|
|
|
# rating
|
|
metadata["rating"] = {"ratingValue":"{:}".format(work.priority())}
|
|
return content
|
|
|
|
class Facet:
|
|
title = ''
|
|
works = None
|
|
feed_path = ''
|
|
description = ''
|
|
|
|
def feed(self, page=None, order_by='newest'):
|
|
self.works = self.works.order_by(*facets.get_order_by(order_by))
|
|
return opds_feed_for_works(self, page=page, order_by=order_by)
|
|
|
|
def updated(self):
|
|
# return the creation date for most recently added item
|
|
if not self.works:
|
|
return pytz.utc.localize(datetime.datetime.utcnow()).isoformat()
|
|
else:
|
|
return pytz.utc.localize(self.works[0].created).isoformat()
|
|
|
|
def get_facet_facet(facet_path):
|
|
class Facet_Facet(Facet):
|
|
|
|
def __init__(self, facet_path=facet_path):
|
|
self.feed_path = facet_path
|
|
self.facet_object = facets.get_facet_object(facet_path)
|
|
self.title = "Unglue.it"
|
|
for facet in self.facet_object.facets():
|
|
self.title = self.title + " " + facet.title
|
|
self.works = self.facet_object.get_query_set().distinct()
|
|
self.description = self.facet_object.description
|
|
return Facet_Facet
|
|
|
|
def opds_feed_for_work(work_id):
|
|
class single_work_facet:
|
|
def __init__(self, work_id):
|
|
class NullFacet(facets.BaseFacet):
|
|
def get_other_groups(self):
|
|
return[]
|
|
try:
|
|
works=models.Work.objects.filter(id=work_id)
|
|
except models.Work.DoesNotExist:
|
|
works=models.Work.objects.none()
|
|
except ValueError:
|
|
# not a valid work_id
|
|
works=models.Work.objects.none()
|
|
self.works=works
|
|
self.title='Unglue.it work #%s' % work_id
|
|
self.feed_path=''
|
|
self.facet_object= NullFacet(None)
|
|
return opds_feed_for_works( single_work_facet(work_id) )
|
|
|
|
def opds_feed_for_works(the_facet, page=None, order_by='newest'):
|
|
if order_by == 'none':
|
|
books_per_page = 50000
|
|
else:
|
|
books_per_page = 50
|
|
works = the_facet.works
|
|
feed_path = the_facet.feed_path
|
|
title = the_facet.title
|
|
metadata = {"title": title}
|
|
links = []
|
|
feedlist = []
|
|
feed = {"@context": JSONCONTEXT, "metadata": metadata, "links": links, "publications": feedlist}
|
|
|
|
# add title
|
|
# TO DO: will need to calculate the number items and where in the feed we are
|
|
|
|
metadata['title'] = title + ' - sorted by ' + order_by
|
|
|
|
# links: start, self, next/prev (depending what's necessary -- to start with put all CC books)
|
|
|
|
if not page:
|
|
page = 0
|
|
else:
|
|
try:
|
|
page = int(page)
|
|
except TypeError:
|
|
page = 0
|
|
|
|
# self link
|
|
append_navlink(feed, 'self', feed_path, page , order_by, title="First {}".format(books_per_page))
|
|
|
|
# next link
|
|
try:
|
|
works[books_per_page * page + books_per_page]
|
|
append_navlink(feed, 'next', feed_path, page+1 , order_by,
|
|
title="Next {}".format(books_per_page))
|
|
except IndexError:
|
|
pass
|
|
|
|
# sort facets
|
|
append_navlink(feed, FACET_RELATION, feed_path, None, 'popular', group="Order", active = order_by=='popular', title="Sorted by popularity")
|
|
append_navlink(feed, FACET_RELATION, feed_path, None, 'newest', group="Order", active = order_by=='newest', title="Sorted by newest")
|
|
|
|
#other facets
|
|
for other_group in the_facet.facet_object.get_other_groups():
|
|
for facet_object in other_group.get_facets():
|
|
append_navlink(feed, FACET_RELATION, feed_path + '/' + facet_object.facet_name, None, order_by, group=other_group.title, title=facet_object.title)
|
|
|
|
works = islice(works, books_per_page * page, books_per_page * page + books_per_page)
|
|
if page > 0:
|
|
append_navlink(feed, 'previous', feed_path, page-1, order_by, title="Previous {}".format(books_per_page))
|
|
for work in works:
|
|
node = work_node(work, facet=the_facet.facet_object)
|
|
feedlist.append(node)
|
|
return json.dumps(feed,indent=2, separators=(',', ': '), sort_keys=False)
|
|
|
|
def append_navlink(feed, rel, path, page, order_by, group=None, active=None , title=""):
|
|
link = {
|
|
"rel": rel,
|
|
"href": UNGLUEIT_URL + "/api/opdsjson/" + urlquote(path) + '/?order_by=' + order_by + ('&page=' + unicode(page) ),
|
|
"type": ACQUISITION,
|
|
"title": title,
|
|
}
|
|
if rel == FACET_RELATION:
|
|
if group:
|
|
link['facetGroup'] = group
|
|
if active:
|
|
link['activeFacet'] = 'true'
|
|
feed['links'].append(link) |