from xml.parsers.expat import ExpatError
from datetime import date
import time
+import re
+from librarian.util import roman_to_int
from librarian import (ValidationError, NoDublinCore, ParseError, DCNS, RDFNS,
- WLURI)
+ XMLNS, WLURI)
import lxml.etree as etree # ElementTree API using libxml2
from lxml.etree import XMLSyntaxError
+class TextPlus(unicode):
+ pass
+
+class DatePlus(date):
+ pass
+
+
# ==============
# = Converters =
# ==============
return 'Person(last_name=%r, first_names=*%r)' % (self.last_name, self.first_names)
def as_date(text):
+ """Dates for digitization of pictures. It seems we need the following:
+ranges: '1350-1450',
+centuries: "XVIII w.'
+half centuries/decades: '2 poł. XVIII w.', 'XVII w., l. 20'
+later-then: 'po 1450'
+circa 'ok. 1813-1814', 'ok.1876-ok.1886
+turn: 1893/1894
+for now we will translate this to some single date losing information of course.
+ """
try:
- try:
- t = time.strptime(text, '%Y-%m-%d')
- except ValueError:
- t = time.strptime(text, '%Y')
- return date(t[0], t[1], t[2])
+ # check out the "N. poł X w." syntax
+ if isinstance(text, str): text = text.decode("utf-8")
+
+ century_format = u"(?:([12]) *poł[.]? +)?([MCDXVI]+) *w[.,]*(?: *l[.]? *([0-9]+))?"
+ vague_format = u"(?:po *|ok. *)?([0-9]{4})(-[0-9]{2}-[0-9]{2})?"
+
+ m = re.match(century_format, text)
+ m2 = re.match(vague_format, text)
+ if m:
+ half = m.group(1)
+ decade = m.group(3)
+ century = roman_to_int(str(m.group(2)))
+ if half is not None:
+ if decade is not None:
+ raise ValueError("Bad date format. Cannot specify both half and decade of century")
+ half = int(half)
+ t = ((century*100 + (half-1)*50), 1, 1)
+ else:
+ decade = int(decade or 0)
+ t = ((century*100 + decade), 1, 1)
+ elif m2:
+ year = m2.group(1)
+ mon_day = m2.group(2)
+ if mon_day:
+ t = time.strptime(year + mon_day, "%Y-%m-%d")
+ else:
+ t = time.strptime(year, '%Y')
+ else:
+ raise ValueError
+
+ return DatePlus(t[0], t[1], t[2])
except ValueError, e:
raise ValueError("Unrecognized date format. Try YYYY-MM-DD or YYYY.")
if isinstance(text, unicode):
return text
else:
- return text.decode('utf-8')
+ return TextPlus(text.decode('utf-8'))
+
+def as_wluri_strict(text):
+ return WLURI.strict(text)
class Field(object):
- def __init__(self, uri, attr_name, type=as_unicode, multiple=False, salias=None, **kwargs):
+ def __init__(self, uri, attr_name, validator=as_unicode, strict=None, multiple=False, salias=None, **kwargs):
self.uri = uri
self.name = attr_name
- self.validator = type
+ self.validator = validator
+ self.strict = strict
self.multiple = multiple
self.salias = salias
self.required = kwargs.get('required', True) and not kwargs.has_key('default')
self.default = kwargs.get('default', [] if multiple else [None])
- def validate_value(self, val):
+ def validate_value(self, val, strict=False):
+ if strict and self.strict is not None:
+ validator = self.strict
+ else:
+ validator = self.validator
try:
if self.multiple:
- if self.validator is None:
+ if validator is None:
return val
- return [ self.validator(v) if v is not None else v for v in val ]
+ new_values = []
+ for v in val:
+ nv = v
+ if v is not None:
+ nv = validator(v)
+ if hasattr(v, 'lang'):
+ setattr(nv, 'lang', v.lang)
+ new_values.append(nv)
+ return new_values
elif len(val) > 1:
raise ValidationError("Multiple values not allowed for field '%s'" % self.uri)
elif len(val) == 0:
raise ValidationError("Field %s has no value to assign. Check your defaults." % self.uri)
else:
- if self.validator is None or val[0] is None:
+ if validator is None or val[0] is None:
return val[0]
- return self.validator(val[0])
+ nv = validator(val[0])
+ if hasattr(val[0], 'lang'):
+ setattr(nv, 'lang', val[0].lang)
+ return nv
except ValueError, e:
raise ValidationError("Field '%s' - invald value: %s" % (self.uri, e.message))
- def validate(self, fdict):
+ def validate(self, fdict, fallbacks=None, strict=False):
+ if fallbacks is None:
+ fallbacks = {}
if not fdict.has_key(self.uri):
if not self.required:
- f = self.default
+ # Accept single value for single fields and saliases.
+ if self.name in fallbacks:
+ if self.multiple:
+ f = fallbacks[self.name]
+ else:
+ f = [fallbacks[self.name]]
+ elif self.salias and self.salias in fallbacks:
+ f = [fallbacks[self.salias]]
+ else:
+ f = self.default
else:
raise ValidationError("Required field %s not found" % self.uri)
else:
f = fdict[self.uri]
- return self.validate_value(f)
+ return self.validate_value(f, strict=strict)
+
+ def __eq__(self, other):
+ if isinstance(other, Field) and other.name == self.name:
+ return True
+ return False
+
+class DCInfo(type):
+ def __new__(meta, classname, bases, class_dict):
+ fields = list(class_dict['FIELDS'])
+ for base in bases[::-1]:
+ if hasattr(base, 'FIELDS'):
+ for field in base.FIELDS[::-1]:
+ try:
+ fields.index(field)
+ except ValueError:
+ fields.insert(0, field)
+ class_dict['FIELDS'] = tuple(fields)
+ return super(DCInfo, meta).__new__(meta, classname, bases, class_dict)
+
+
+class WorkInfo(object):
+ __metaclass__ = DCInfo
-class BookInfo(object):
FIELDS = (
- Field( DCNS('creator'), 'author', as_person),
+ Field( DCNS('creator'), 'authors', as_person, salias='author', multiple=True),
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('audience'), 'audiences', salias='audience', multiple=True,
- required=False),
- Field( DCNS('date'), 'created_at', as_date),
- Field( DCNS('date.pd'), 'released_to_public_domain_at', as_date, required=False),
+ Field( DCNS('type'), 'type', required=False, multiple=True),
+
Field( DCNS('contributor.editor'), 'editors', \
as_person, salias='editor', multiple=True, default=[]),
- Field( DCNS('contributor.translator'), 'translators', \
- as_person, salias='translator', multiple=True, default=[]),
Field( DCNS('contributor.technical_editor'), 'technical_editors',
as_person, salias='technical_editor', multiple=True, default=[]),
+ Field( DCNS('contributor.funding'), 'funders',
+ salias='funder', multiple=True, default=[]),
+ Field( DCNS('contributor.thanks'), 'thanks', required=False),
+
+ Field( DCNS('date'), 'created_at', as_date),
+ Field( DCNS('date.pd'), 'released_to_public_domain_at', as_date, required=False),
Field( DCNS('publisher'), 'publisher'),
+
+ Field( DCNS('language'), 'language'),
+ Field( DCNS('description'), 'description', required=False),
+
Field( DCNS('source'), 'source_name', required=False),
Field( DCNS('source.URL'), 'source_url', required=False),
- Field( DCNS('identifier.url'), 'url', WLURI),
- Field( DCNS('relation.hasPart'), 'parts', WLURI, multiple=True, required=False),
+ Field( DCNS('identifier.url'), 'url', WLURI, strict=as_wluri_strict),
Field( DCNS('rights.license'), 'license', required=False),
Field( DCNS('rights'), 'license_description'),
- Field( DCNS('language'), 'language'),
- Field( DCNS('description'), 'description', required=False),
)
@classmethod
- def from_string(cls, xml):
+ def from_string(cls, xml, *args, **kwargs):
from StringIO import StringIO
- return cls.from_file(StringIO(xml))
+ return cls.from_file(StringIO(xml), *args, **kwargs)
@classmethod
- def from_file(cls, xmlfile):
+ def from_file(cls, xmlfile, *args, **kwargs):
desc_tag = None
try:
iter = etree.iterparse(xmlfile, ['start', 'end'])
# 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)
+ return cls.from_element(desc_tag, *args, **kwargs)
except XMLSyntaxError, e:
raise ParseError(e)
except ExpatError, e:
raise ParseError(e)
@classmethod
- def from_element(cls, rdf_tag):
+ def from_element(cls, rdf_tag, *args, **kwargs):
# the tree is already parsed, so we don't need to worry about Expat errors
field_dict = {}
- desc = rdf_tag.find(".//" + RDFNS('Description') )
+ desc = rdf_tag.find(".//" + RDFNS('Description'))
if desc is None:
raise NoDublinCore("No DublinCore section found.")
+ lang = None
+ p = desc
+ while p is not None and lang is None:
+ lang = p.attrib.get(XMLNS('lang'))
+ p = p.getparent()
+
for e in desc.getchildren():
fv = field_dict.get(e.tag, [])
- fv.append(e.text)
+ if e.text is not None:
+ text = e.text
+ if not isinstance(text, unicode):
+ text = text.decode('utf-8')
+ val = TextPlus(text)
+ val.lang = e.attrib.get(XMLNS('lang'), lang)
+ else:
+ val = e.text
+ fv.append(val)
field_dict[e.tag] = fv
- return cls( desc.attrib, field_dict )
+ return cls(desc.attrib, field_dict, *args, **kwargs)
- def __init__(self, rdf_attrs, dc_fields):
+ def __init__(self, rdf_attrs, dc_fields, fallbacks=None, strict=False):
"""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.fmap = {}
for field in self.FIELDS:
- value = field.validate( dc_fields )
+ value = field.validate(dc_fields, fallbacks=fallbacks,
+ strict=strict)
setattr(self, 'prop_' + field.name, value)
self.fmap[field.name] = field
if field.salias: self.fmap[field.salias] = field
- self.validate()
-
- def validate(self):
- self.url.validate_language(self.language)
-
def __getattribute__(self, name):
try:
field = object.__getattribute__(self, 'fmap')[name]
if not field.multiple:
raise "OUCH!! for field %s" % name
- return value[0]
+ return value[0] if value else None
except (KeyError, AttributeError):
return object.__getattribute__(self, name)
return root
-
def serialize(self):
rdf = {}
rdf['about'] = { 'uri': RDFNS('about'), 'value': self.about }
return result
-def parse(file_name):
- return BookInfo.from_file(file_name)
+
+class BookInfo(WorkInfo):
+ FIELDS = (
+ Field( DCNS('audience'), 'audiences', salias='audience', multiple=True,
+ required=False),
+
+ Field( DCNS('subject.period'), 'epochs', salias='epoch', multiple=True,
+ required=False),
+ Field( DCNS('subject.type'), 'kinds', salias='kind', multiple=True,
+ required=False),
+ Field( DCNS('subject.genre'), 'genres', salias='genre', multiple=True,
+ required=False),
+
+ Field( DCNS('contributor.translator'), 'translators', \
+ as_person, salias='translator', multiple=True, default=[]),
+ Field( DCNS('relation.hasPart'), 'parts',
+ WLURI, strict=as_wluri_strict, multiple=True, required=False),
+ Field( DCNS('relation.isVariantOf'), 'variant_of',
+ WLURI, strict=as_wluri_strict, required=False),
+
+ Field( DCNS('relation.coverImage.url'), 'cover_url', required=False),
+ Field( DCNS('relation.coverImage.attribution'), 'cover_by', required=False),
+ Field( DCNS('relation.coverImage.source'), 'cover_source', required=False),
+ )
+
+
+def parse(file_name, cls=BookInfo):
+ return cls.from_file(file_name)
fnp / librarian.git / blobdiff