# -*- coding: utf-8 -*-
+#
+# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
from xml.parsers.expat import ExpatError
from datetime import date
import time
-from librarian import ValidationError, NoDublinCore
+from librarian import ValidationError, NoDublinCore, ParseError, DCNS, RDFNS
import lxml.etree as etree # ElementTree API using libxml2
from lxml.etree import XMLSyntaxError
return self.validate_value(f)
-# ==========
-# = Parser =
-# ==========
-class XMLNamespace(object):
- '''Represents XML namespace.'''
-
- def __init__(self, uri):
- self.uri = uri
-
- def __call__(self, tag):
- return '{%s}%s' % (self.uri, tag)
-
- def __contains__(self, tag):
- return tag.startswith(str(self))
-
- def __repr__(self):
- return 'XMLNamespace(%r)' % self.uri
-
- def __str__(self):
- return '%s' % self.uri
-class BookInfo(object):
- RDF = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
- DC = XMLNamespace('http://purl.org/dc/elements/1.1/')
-
+class BookInfo(object):
FIELDS = (
- Field( DC('creator'), 'author', as_person),
- Field( DC('title'), 'title'),
- Field( DC('subject.period'), 'epoches', salias='epoch', multiple=True),
- Field( DC('subject.type'), 'kinds', salias='kind', multiple=True),
- Field( DC('subject.genre'), 'genres', salias='genre', multiple=True),
- Field( DC('date'), 'created_at', as_date),
- Field( DC('date.pd'), 'released_to_public_domain_at', as_date, required=False),
- Field( DC('contributor.editor'), 'editors', \
+ Field( DCNS('creator'), 'author', as_person),
+ Field( DCNS('title'), 'title'),
+ Field( DCNS('subject.period'), 'epochs', salias='epoch', multiple=True),
+ Field( DCNS('subject.type'), 'kinds', salias='kind', multiple=True),
+ Field( DCNS('subject.genre'), 'genres', salias='genre', multiple=True),
+ Field( DCNS('date'), 'created_at', as_date),
+ Field( DCNS('date.pd'), 'released_to_public_domain_at', as_date, required=False),
+ Field( DCNS('contributor.editor'), 'editors', \
as_person, salias='editor', multiple=True, default=[]),
- Field( DC('contributor.translator'), 'translators', \
+ Field( DCNS('contributor.translator'), 'translators', \
as_person, salias='translator', multiple=True, default=[]),
- Field( DC('contributor.technical_editor'), 'technical_editors',
+ Field( DCNS('contributor.technical_editor'), 'technical_editors',
as_person, salias='technical_editor', multiple=True, default=[]),
- Field( DC('publisher'), 'publisher'),
- Field( DC('source'), 'source_name', required=False),
- Field( DC('source.URL'), 'source_url', required=False),
- Field( DC('identifier.url'), 'url'),
- Field( DC('relation.hasPart'), 'parts', multiple=True, required=False),
- Field( DC('rights.license'), 'license', required=False),
- Field( DC('rights'), 'license_description'),
+ Field( DCNS('publisher'), 'publisher'),
+ Field( DCNS('source'), 'source_name', required=False),
+ Field( DCNS('source.URL'), 'source_url', required=False),
+ Field( DCNS('identifier.url'), 'url'),
+ Field( DCNS('relation.hasPart'), 'parts', multiple=True, required=False),
+ Field( DCNS('rights.license'), 'license', required=False),
+ Field( DCNS('rights'), 'license_description'),
)
+
+ @property
+ def slug(self):
+ return self.url.rsplit('/', 1)[1]
@classmethod
def from_string(cls, xml):
try:
iter = etree.iterparse(xmlfile, ['start', 'end'])
for (event, element) in iter:
- if element.tag == cls.RDF('RDF') and event == 'start':
+ if element.tag == RDFNS('RDF') and event == 'start':
desc_tag = element
break
# continue 'till the end of RDF section
for (event, element) in iter:
- if element.tag == cls.RDF('RDF') and event == 'end':
+ if element.tag == RDFNS('RDF') and event == 'end':
break
# if there is no end, Expat should yell at us with an ExpatError
def from_element(cls, rdf_tag):
# the tree is already parsed, so we don't need to worry about Expat errors
field_dict = {}
- desc = rdf_tag.find(".//" + cls.RDF('Description') )
+ desc = rdf_tag.find(".//" + RDFNS('Description') )
if desc is None:
raise NoDublinCore("No DublinCore section found.")
fv.append(e.text)
field_dict[e.tag] = fv
- return cls( desc.attrib, field_dict )
+ return cls( desc.attrib, field_dict )
def __init__(self, rdf_attrs, dc_fields):
"""rdf_attrs should be a dictionary-like object with any attributes of the RDF:Description.
dc_fields - dictionary mapping DC fields (with namespace) to list of text values for the
given field. """
- self.about = rdf_attrs.get(self.RDF('about'))
+ self.about = rdf_attrs.get(RDFNS('about'))
self.fmap = {}
for field in self.FIELDS:
#etree._namespace_map[str(self.DC)] = 'dc'
if parent is None:
- root = etree.Element(self.RDF('RDF'))
+ root = etree.Element(RDFNS('RDF'))
else:
- root = parent.makeelement(self.RDF('RDF'))
+ root = parent.makeelement(RDFNS('RDF'))
- description = etree.SubElement(root, self.RDF('Description'))
+ description = etree.SubElement(root, RDFNS('Description'))
if self.about:
- description.set(self.RDF('about'), self.about)
+ description.set(RDFNS('about'), self.about)
for field in self.FIELDS:
v = getattr(self, field.name, None)
return root
+
+ def serialize(self):
+ rdf = {}
+ rdf['about'] = { 'uri': RDFNS('about'), 'value': self.about }
+
+ dc = {}
+ for field in self.FIELDS:
+ v = getattr(self, field.name, None)
+ if v is not None:
+ if field.multiple:
+ if len(v) == 0: continue
+ v = [ unicode(x) for x in v if v is not None ]
+ else:
+ v = unicode(v)
+
+ dc[field.name] = {'uri': field.uri, 'value': v}
+ rdf['fields'] = dc
+ return rdf
+
def to_dict(self):
result = {'about': self.about}
for field in self.FIELDS:
if v is not None:
if field.multiple:
if len(v) == 0: continue
- v = [ unicode(x) for x in v ]
+ v = [ unicode(x) for x in v if v is not None ]
else:
v = unicode(v)
result[field.name] = v
if field.salias:
v = getattr(self, field.salias)
- if v is not None: result[field.salias] = v
+ if v is not None: result[field.salias] = unicode(v)
return result
fnp / librarian.git / blobdiff