from lxml.etree import ElementTree
from django.db.models import Q
from django.conf import settings
+from django.contrib.sites.models import Site
+from django.utils import timezone
+
+WL_DC_READER_XPATH = '(.|*)/rdf:RDF/rdf:Description/%s/text()'
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()'),
+ 'title': ('textList', WL_DC_READER_XPATH % 'dc:title'),
+ 'creator': ('textList', WL_DC_READER_XPATH % 'dc:creator'),
+ 'subject': ('textList', (WL_DC_READER_XPATH + ' | ' + WL_DC_READER_XPATH + ' | ' + WL_DC_READER_XPATH) %
+ ('dc:subject.period', 'dc:subject.type', 'dc:subject.genre')),
+ 'description': ('textList', WL_DC_READER_XPATH % 'dc:description'),
+ 'publisher': ('textList', WL_DC_READER_XPATH % 'dc:publisher'),
+ 'contributor': ('textList', (WL_DC_READER_XPATH + ' | ' + WL_DC_READER_XPATH + ' | ' + WL_DC_READER_XPATH) %
+ ('dc:contributor.editor', 'dc:contributor.translator', 'dc:contributor.technical_editor')),
+ 'date': ('textList', WL_DC_READER_XPATH % 'dc:date'),
+ 'type': ('textList', WL_DC_READER_XPATH % 'dc:type'),
+ 'format': ('textList', WL_DC_READER_XPATH % 'dc:format'),
+ 'identifier': ('textList', WL_DC_READER_XPATH % 'dc:identifier.url'),
+ 'source': ('textList', WL_DC_READER_XPATH % 'dc:source'),
+ 'language': ('textList', WL_DC_READER_XPATH % 'dc:language'),
+ #'isPartOf': ('textList', 'rdf:RDF/rdf:Description/dc:relation.isPartOf/text()'),
+ 'hasPart': ('textList', WL_DC_READER_XPATH % 'dc:relation.hasPart'),
# '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()')
+ 'rights': ('textList', WL_DC_READER_XPATH % 'dc:rights')
},
namespaces={
'dc': 'http://purl.org/dc/elements/1.1/',
)
+NS_DCTERMS = "http://purl.org/dc/terms/"
+
+
+def nsdcterms(name):
+ return '{%s}%s' % (NS_DCTERMS, name)
+
+
class Catalogue(common.ResumptionOAIPMH):
TAG_CATEGORIES = ['author', 'epoch', 'kind', 'genre']
-
- def __init__(self):
+
+ 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)
+ year_zero = timezone.make_aware(datetime(1990, 1, 1, 0, 0, 0), timezone.utc)
try:
earliest_change = \
try:
earliest_delete = \
- Deleted.objects.ordery_by('deleted_at')[0].deleted_at
+ 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):
- xml = etree.parse(book.xml_file)
+ try:
+ xml = etree.parse(book.xml_file)
+ finally:
+ book.xml_file.close()
md = wl_dc_reader(xml)
- return md.getMap()
+ m = md.getMap()
+ if book.parent:
+ m['isPartOf'] = [str(WLURI.from_slug(book.parent.slug))]
+ return m
def record_for_book(self, book, headers_only=False):
meta = None
- identifier = str(WLURI.from_slug(book.slug))
+ 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)
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.")
+ raise error.NoSetHierarchyError("Wolne Lektury does not support sets.")
# books = Book.tagged.with_all([tag])
else:
books = Book.objects.all()
- deleted = Deleted.objects.filter(slug__isnull=False)
+ deleted = Deleted.objects.exclude(slug__exact=u'')
books = books.order_by('changed_at')
deleted = deleted.order_by('deleted_at')
"""
Returns (header, metadata, about) for given record.
"""
- slug = WLURI(kw['identifier']).slug
+ slug = self.identifier_to_slug(kw['identifier'])
try:
book = Book.objects.get(slug=slug)
return self.record_for_book(book)
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),
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),
return records, None
def listMetadataFormats(self, **kw):
- return [('oai_dc',
- 'http://www.openarchives.org/OAI/2.0/oai_dc.xsd',
- server.NS_OAIDC)]
+ formats = [
+ ('oai_dc',
+ 'http://www.openarchives.org/OAI/2.0/oai_dc.xsd',
+ server.NS_OAIDC),
+ ('qdc',
+ 'http://dublincore.org/schemas/xmls/qdc/2006/01/06/dcterms.xsd',
+ NS_DCTERMS)]
+ 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.")
# tag.name,
# tag.description))
# return tags, None
-
-
fnp / wolnelektury.git / blobdiff