+++ /dev/null
-from oaipmh import server, common, metadata, error
-from catalogue.models import Book, Tag
-from api.models import Deleted
-from api.handlers import WL_BASE
-from librarian.dcparser import BookInfo
-from django.contrib.contenttypes.models import ContentType
-from django.contrib.auth.models import User
-from datetime import datetime
-from lxml import etree
-from lxml.etree import ElementTree
-from django.db.models import Q
-from django.conf import settings
-from django.contrib.sites.models import Site
-
-
-wl_dc_reader = metadata.MetadataReader(
- fields={
- 'title': ('textList', 'rdf:RDF/rdf:Description/dc:title/text()'),
- 'creator': ('textList', 'rdf:RDF/rdf:Description/dc:creator/text()'),
- 'subject': ('textList', 'rdf:RDF/rdf:Description/dc:subject.period/text() | rdf:RDF/rdf:Description/dc:subject.type/text() | rdf:RDF/rdf:Description/dc:subject.genre/text()'),
- 'description': ('textList', 'rdf:RDF/rdf:Description/dc:description/text()'),
- 'publisher': ('textList', 'rdf:RDF/rdf:Description/dc:publisher/text()'),
- 'contributor': ('textList', 'rdf:RDF/rdf:Description/dc:contributor.editor/text() | rdf:RDF/rdf:Description/dc:contributor.translator/text() | rdf:RDF/rdf:Description/dc:contributor.technical_editor/text()'),
- 'date': ('textList', 'rdf:RDF/rdf:Description/dc:date/text()'),
- 'type': ('textList', 'rdf:RDF/rdf:Description/dc:type/text()'),
- 'format': ('textList', 'rdf:RDF/rdf:Description/dc:format/text()'),
- 'identifier': ('textList', 'rdf:RDF/rdf:Description/dc:identifier.url/text()'),
- 'source': ('textList', 'rdf:RDF/rdf:Description/dc:source/text()'),
- 'language': ('textList', 'rdf:RDF/rdf:Description/dc:language/text()'),
- 'isPartOf': ('textList', 'rdf:RDF/rdf:Description/dc:relation.isPartOf/text()'),
- 'hasPart': ('textList', 'rdf:RDF/rdf:Description/dc:relation.hasPart/text()'),
- # 'relation': ('textList', 'rdf:RDF/rdf:Description/dc:relation/text()'),
- # 'coverage': ('textList', 'rdf:RDF/rdf:Description/dc:coverage/text()'),
- 'rights': ('textList', 'rdf:RDF/rdf:Description/dc:rights/text()')
- },
- namespaces={
- 'dc': 'http://purl.org/dc/elements/1.1/',
- 'rdf': 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'}
- )
-
-
-class Catalogue(common.ResumptionOAIPMH):
- TAG_CATEGORIES = ['author', 'epoch', 'kind', 'genre']
-
- def __init__(self, metadata_registry):
- super(Catalogue, self).__init__()
- self.metadata_registry = metadata_registry
-
- self.oai_id = "oai:"+Site.objects.get_current().domain+":%s"
-
- # earliest change
- year_zero = datetime(1990, 1, 1, 0, 0, 0)
-
- try:
- earliest_change = \
- Book.objects.order_by('changed_at')[0].changed_at
- except: earliest_change = year_zero
-
- try:
- earliest_delete = \
- Deleted.objects.exclude(slug__exact=u'').ordery_by('deleted_at')[0].deleted_at
- except: earliest_delete = year_zero
-
- self.earliest_datestamp = earliest_change <= earliest_delete and \
- earliest_change or earliest_delete
-
- def metadata(self, book):
- try:
- xml = etree.parse(book.xml_file)
- finally:
- book.xml_file.close()
- md = wl_dc_reader(xml)
- return md.getMap()
-
- def record_for_book(self, book, headers_only=False):
- meta = None
- identifier = self.slug_to_identifier(book.slug)
- if isinstance(book, Book):
- # setSpec = map(self.tag_to_setspec, book.tags.filter(category__in=self.TAG_CATEGORIES))
- header = common.Header(identifier, book.changed_at, [], False)
- if not headers_only:
- meta = common.Metadata(self.metadata(book))
- about = None
- elif isinstance(book, Deleted):
- header = common.Header(identifier, book.deleted_at, [], True)
- if not headers_only:
- meta = common.Metadata({})
- about = None
- if headers_only:
- return header
- return header, meta, about
-
- def identify(self, **kw):
- ident = common.Identify(
- 'Wolne Lektury', # generate
- '%s/oaipmh' % WL_BASE, # generate
- '2.0', # version
- [m[1] for m in settings.MANAGERS], # adminEmails
- self.earliest_datestamp, # earliest datestamp of any change
- 'persistent', # deletedRecord
- 'YYYY-MM-DDThh:mm:ssZ', # granularity
- ['identity'], # compression
- [] # descriptions
- )
- return ident
-
- def books(self, tag, from_, until):
- if tag:
- # we do not support sets, since they are problematic for deleted books.
- raise errror.NoSetHierarchyError("Wolne Lektury does not support sets.")
- # books = Book.tagged.with_all([tag])
- else:
- books = Book.objects.all()
- deleted = Deleted.objects.exclude(slug__exact=u'')
-
- books = books.order_by('changed_at')
- deleted = deleted.order_by('deleted_at')
- if from_:
- books = books.filter(changed_at__gte=from_)
- deleted = deleted.filter(deleted_at__gte=from_)
- if until:
- books = books.filter(changed_at__lte=until)
- deleted = deleted.filter(deleted_at__lte=until)
- return list(books) + list(deleted)
-
- @staticmethod
- def tag_to_setspec(tag):
- return "%s:%s" % (tag.category, tag.slug)
-
- @staticmethod
- def setspec_to_tag(s):
- if not s: return None
- cs = s.split(':')
- if len(cs) == 2:
- if not cs[0] in Catalogue.TAG_CATEGORIES:
- raise error.NoSetHierarchyError("No category part in set")
- tag = Tag.objects.get(slug=cs[1], category=cs[0])
- return tag
- raise error.NoSetHierarchyError("Setspec should have two components: category:slug")
-
- def getRecord(self, **kw):
- """
-Returns (header, metadata, about) for given record.
- """
- slug = self.identifier_to_slug(kw['identifier'])
- try:
- book = Book.objects.get(slug=slug)
- return self.record_for_book(book)
- except Book.DoesNotExist:
- book_type = ContentType.objects.get_for_model(Book)
- try:
- deleted_book = Deleted.objects.get(content_type=book_type,
- slug=slug)
- except:
- raise error.IdDoesNotExistError("No item for this identifier")
- return self.record_for_book(deleted_book)
-
- def validate_kw(self, kw):
- if 'resumptionToken' in kw:
- raise error.BadResumptionTokenError("No resumption token support at this point")
- if 'metadataPrefix' in kw and not self.metadata_registry.hasWriter(kw['metadataPrefix']):
- raise error.CannotDisseminateFormatError("This format is not supported")
-
- def identifier_to_slug(self, ident):
- return ident.split(':')[-1]
-
- def slug_to_identifier(self, slug):
- return self.oai_id % slug
-
- def listIdentifiers(self, **kw):
- self.validate_kw(kw)
- records = [self.record_for_book(book, headers_only=True) for
- book in self.books(None,
- kw.get('from_', None),
- kw.get('until', None))]
- return records, None
-
- def listRecords(self, **kw):
- """
-can get a resumptionToken kw.
-returns result, token
- """
- self.validate_kw(kw)
- records = [self.record_for_book(book) for
- book in self.books(None,
- kw.get('from_', None),
- kw.get('until', None))]
-
- return records, None
-
- def listMetadataFormats(self, **kw):
- formats = [('oai_dc',
- 'http://www.openarchives.org/OAI/2.0/oai_dc.xsd',
- server.NS_OAIDC)]
- if 'identifier' in kw:
- slug = self.identifier_to_slug(kw['identifier'])
- try:
- b = Book.objects.get(slug=slug)
- return formats
- except:
- try:
- d = Deleted.objects.get(slug=slug)
- return []
- except:
- raise error.IdDoesNotExistError("This id does not exist")
- else:
- return formats
-
- def listSets(self, **kw):
- raise error.NoSetHierarchyError("Wolne Lektury does not support sets.")
- # tags = []
- # for category in Catalogue.TAG_CATEGORIES:
- # for tag in Tag.objects.filter(category=category):
- # tags.append(("%s:%s" % (tag.category, tag.slug),
- # tag.name,
- # tag.description))
- # return tags, None
-
-
fnp / wolnelektury.git / blobdiff