# -*- 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
def __init__(self, last_name, *first_names):
self.last_name = last_name
self.first_names = first_names
-
+
@classmethod
def from_text(cls, text):
parts = [ token.strip() for token in text.split(',') ]
raise ValueError("Found a comma, but no names given: \"%s\" -> %r." % (text, parts))
names = [ name for name in parts[1].split() if len(name) ] # all non-whitespace tokens
return cls(surname, *names)
-
+
def __eq__(self, right):
return self.last_name == right.last_name and self.first_names == right.first_names
-
-
+
+
def __unicode__(self):
if len(self.first_names) > 0:
return '%s, %s' % (self.last_name, ' '.join(self.first_names))
else:
return self.last_name
-
+
def __repr__(self):
return 'Person(last_name=%r, first_names=*%r)' % (self.last_name, self.first_names)
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/')
-
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):
from StringIO import StringIO
return cls.from_file(StringIO(xml))
-
+
@classmethod
def from_file(cls, xmlfile):
- desc_tag = None
+ desc_tag = None
try:
- iter = etree.iterparse(xmlfile, ['start', 'end'])
+ 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
-
+
# extract data from the element and make the info
return cls.from_element(desc_tag)
except XMLSyntaxError, e:
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 = field_dict.get(e.tag, [])
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
+ 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:
else: # singular alias
if not field.multiple:
raise "OUCH!! for field %s" % name
-
+
return value[0]
except (KeyError, AttributeError):
return object.__getattribute__(self, name)
return object.__setattr__(self, name, newvalue)
def update(self, field_dict):
- """Update using field_dict. Verify correctness, but don't check if all
+ """Update using field_dict. Verify correctness, but don't check if all
required fields are present."""
for field in self.FIELDS:
if field_dict.has_key(field.name):
"""XML representation of this object."""
#etree._namespace_map[str(self.RDF)] = 'rdf'
#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, RDFNS('Description'))
- description = etree.SubElement(root, self.RDF('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)
if v is not None:
e = etree.Element(field.uri)
e.text = unicode(v)
description.append(e)
-
+
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
def parse(file_name):
fnp / librarian.git / blobdiff