Merge branch 'reflow'
[wolnelektury.git] / apps / oai / handlers.py
diff --git a/apps/oai/handlers.py b/apps/oai/handlers.py
deleted file mode 100644 (file)
index 824cca9..0000000
+++ /dev/null
@@ -1,219 +0,0 @@
-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
-
-