--- /dev/null
+# -*- 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 __future__ import unicode_literals
+
+from xml.parsers.expat import ExpatError
+from datetime import date
+from functools import total_ordering
+import time
+import re
+import six
+from librarian.util import roman_to_int
+
+from librarian import (ValidationError, NoDublinCore, ParseError, DCNS, RDFNS,
+ XMLNS, WLURI, WLNS, PLMETNS)
+
+import lxml.etree as etree # ElementTree API using libxml2
+from lxml.etree import XMLSyntaxError
+
+
+class TextPlus(six.text_type):
+ pass
+
+
+class DatePlus(date):
+ pass
+
+
+# ==============
+# = Converters =
+# ==============
+@six.python_2_unicode_compatible
+@total_ordering
+class Person(object):
+ """Single person with last name and a list of first names."""
+ 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(',')]
+ if len(parts) == 1:
+ surname = parts[0]
+ names = []
+ elif len(parts) != 2:
+ raise ValueError("Invalid person name. There should be at most one comma: \"%s\"." % text.encode('utf-8'))
+ else:
+ surname = parts[0]
+ if len(parts[1]) == 0:
+ # there is no non-whitespace data after the comma
+ raise ValueError("Found a comma, but no names given: \"%s\" -> %r." % (text, parts))
+ names = parts[1].split()
+ return cls(surname, *names)
+
+ def readable(self):
+ return u" ".join(self.first_names + (self.last_name,))
+
+ def __eq__(self, right):
+ return self.last_name == right.last_name and self.first_names == right.first_names
+
+ def __lt__(self, other):
+ return (self.last_name, self.first_names) < (other.last_name, other.first_names)
+
+ def __hash__(self):
+ return hash((self.last_name, self.first_names))
+
+ def __str__(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)
+
+
+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:
+ # check out the "N. poł X w." syntax
+ if isinstance(text, six.binary_type):
+ 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(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 as e:
+ raise ValueError("Unrecognized date format. Try YYYY-MM-DD or YYYY.")
+
+
+def as_person(text):
+ return Person.from_text(text)
+
+
+def as_unicode(text):
+ if isinstance(text, six.text_type):
+ return text
+ else:
+ return TextPlus(text.decode('utf-8'))
+
+
+def as_wluri_strict(text):
+ return WLURI.strict(text)
+
+
+class Field(object):
+ 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 = validator
+ self.strict = strict
+ self.multiple = multiple
+ self.salias = salias
+
+ self.required = kwargs.get('required', True) and 'default' not in kwargs
+ self.default = kwargs.get('default', [] if multiple else [None])
+
+ 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 validator is None:
+ return 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 validator is None or val[0] is None:
+ return val[0]
+ nv = validator(val[0])
+ if hasattr(val[0], 'lang'):
+ setattr(nv, 'lang', val[0].lang)
+ return nv
+ except ValueError as e:
+ raise ValidationError("Field '%s' - invald value: %s" % (self.uri, e.message))
+
+ def validate(self, fdict, fallbacks=None, strict=False):
+ if fallbacks is None:
+ fallbacks = {}
+ if self.uri not in fdict:
+ if not self.required:
+ # 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, strict=strict)
+
+ def __eq__(self, other):
+ if isinstance(other, Field) and other.name == self.name:
+ return True
+ return False
+
+
+class DCInfo(type):
+ def __new__(mcs, 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, mcs).__new__(mcs, classname, bases, class_dict)
+
+
+class WorkInfo(six.with_metaclass(DCInfo, object)):
+ FIELDS = (
+ Field(DCNS('creator'), 'authors', as_person, salias='author', multiple=True),
+ Field(DCNS('title'), 'title'),
+ Field(DCNS('type'), 'type', required=False, multiple=True),
+
+ Field(DCNS('contributor.editor'), 'editors',
+ as_person, salias='editor', multiple=True, required=False),
+ Field(DCNS('contributor.technical_editor'), 'technical_editors',
+ as_person, salias='technical_editor', multiple=True, required=False),
+ Field(DCNS('contributor.funding'), 'funders', salias='funder', multiple=True, required=False),
+ Field(DCNS('contributor.thanks'), 'thanks', required=False),
+
+ Field(DCNS('date'), 'created_at'),
+ Field(DCNS('date.pd'), 'released_to_public_domain_at', as_date, required=False),
+ Field(DCNS('publisher'), 'publisher', multiple=True),
+
+ Field(DCNS('language'), 'language'),
+ Field(DCNS('description'), 'description', required=False),
+
+ Field(DCNS('source'), 'source_name', required=False),
+ Field(DCNS('source.URL'), 'source_urls', salias='source_url', 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(PLMETNS('digitisationSponsor'), 'sponsors', multiple=True, required=False),
+ Field(WLNS('digitisationSponsorNote'), 'sponsor_note', required=False),
+ Field(WLNS('developmentStage'), 'stage', required=False),
+ )
+
+ @classmethod
+ def from_bytes(cls, xml, *args, **kwargs):
+ return cls.from_file(six.BytesIO(xml), *args, **kwargs)
+
+ @classmethod
+ def from_file(cls, xmlfile, *args, **kwargs):
+ desc_tag = None
+ try:
+ iter = etree.iterparse(xmlfile, ['start', 'end'])
+ for (event, element) in iter:
+ if element.tag == RDFNS('RDF') and event == 'start':
+ desc_tag = element
+ break
+
+ if desc_tag is None:
+ raise NoDublinCore("DublinCore section not found. \
+ Check if there are rdf:RDF and rdf:Description tags.")
+
+ # continue 'till the end of RDF section
+ for (event, element) in iter:
+ 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, *args, **kwargs)
+ except XMLSyntaxError as e:
+ raise ParseError(e)
+ except ExpatError as e:
+ raise ParseError(e)
+
+ @classmethod
+ 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'))
+
+ if desc is None:
+ raise NoDublinCore("There must be a '%s' element inside the RDF." % RDFNS('Description'))
+
+ 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, [])
+ if e.text is not None:
+ text = e.text
+ if not isinstance(text, six.text_type):
+ text = text.decode('utf-8')
+ val = TextPlus(text)
+ val.lang = e.attrib.get(XMLNS('lang'), lang)
+ if e.tag == 'meta':
+ meta_id = e.attrib.get('id')
+ if meta_id and meta_id.endswith('-id'):
+ field_dict[meta_id] = [val.replace('ISBN-', 'ISBN ')]
+ else:
+ val = e.text
+ fv.append(val)
+ field_dict[e.tag] = fv
+
+ return cls(desc.attrib, field_dict, *args, **kwargs)
+
+ 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.about = rdf_attrs.get(RDFNS('about'))
+ self.fmap = {}
+
+ for field in self.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
+
+ def __getattribute__(self, name):
+ try:
+ field = object.__getattribute__(self, 'fmap')[name]
+ value = object.__getattribute__(self, 'prop_'+field.name)
+ if field.name == name:
+ return value
+ else: # singular alias
+ if not field.multiple:
+ raise "OUCH!! for field %s" % name
+
+ return value[0] if value else None
+ except (KeyError, AttributeError):
+ return object.__getattribute__(self, name)
+
+ def __setattr__(self, name, newvalue):
+ try:
+ field = object.__getattribute__(self, 'fmap')[name]
+ if field.name == name:
+ object.__setattr__(self, 'prop_'+field.name, newvalue)
+ else: # singular alias
+ if not field.multiple:
+ raise "OUCH! while setting field %s" % name
+
+ object.__setattr__(self, 'prop_'+field.name, [newvalue])
+ except (KeyError, AttributeError):
+ return object.__setattr__(self, name, newvalue)
+
+ def update(self, field_dict):
+ """Update using field_dict. Verify correctness, but don't check if all
+ required fields are present."""
+ for field in self.FIELDS:
+ if field.name in field_dict:
+ setattr(self, field.name, field_dict[field.name])
+
+ def to_etree(self, parent=None):
+ """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(RDFNS('RDF'))
+ else:
+ root = parent.makeelement(RDFNS('RDF'))
+
+ description = etree.SubElement(root, RDFNS('Description'))
+
+ if self.about:
+ description.set(RDFNS('about'), self.about)
+
+ for field in self.FIELDS:
+ v = getattr(self, field.name, None)
+ if v is not None:
+ if field.multiple:
+ if len(v) == 0:
+ continue
+ for x in v:
+ e = etree.Element(field.uri)
+ if x is not None:
+ e.text = six.text_type(x)
+ description.append(e)
+ else:
+ e = etree.Element(field.uri)
+ e.text = six.text_type(v)
+ description.append(e)
+
+ return root
+
+ def serialize(self):
+ 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 = [six.text_type(x) for x in v if x is not None]
+ else:
+ v = six.text_type(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:
+ v = getattr(self, field.name, None)
+
+ if v is not None:
+ if field.multiple:
+ if len(v) == 0:
+ continue
+ v = [six.text_type(x) for x in v if x is not None]
+ else:
+ v = six.text_type(v)
+ result[field.name] = v
+
+ if field.salias:
+ v = getattr(self, field.salias)
+ if v is not None:
+ result[field.salias] = six.text_type(v)
+
+ return result
+
+
+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('subject.location'), 'location', required=False),
+
+ Field(DCNS('contributor.translator'), 'translators',
+ as_person, salias='translator', multiple=True, required=False),
+ 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),
+ # WLCover-specific.
+ Field(WLNS('coverBarColor'), 'cover_bar_color', required=False),
+ Field(WLNS('coverBoxPosition'), 'cover_box_position', required=False),
+ Field(WLNS('coverClass'), 'cover_class', default=['default']),
+ Field(WLNS('coverLogoUrl'), 'cover_logo_urls', multiple=True, required=False),
+
+ Field('pdf-id', 'isbn_pdf', required=False),
+ Field('epub-id', 'isbn_epub', required=False),
+ Field('mobi-id', 'isbn_mobi', required=False),
+ Field('txt-id', 'isbn_txt', required=False),
+ Field('html-id', 'isbn_html', required=False),
+ )
+
+
+def parse(file_name, cls=BookInfo):
+ return cls.from_file(file_name)
fnp / librarian.git / blobdiff