X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/0fd2ed230ea6d53adb5e627731672c996485167b..a3c860f00c7d12ae5852ddab056c98f52ee43072:/librarian/dcparser.py diff --git a/librarian/dcparser.py b/librarian/dcparser.py index e2f91a0..f5fd42a 100644 --- a/librarian/dcparser.py +++ b/librarian/dcparser.py @@ -7,7 +7,8 @@ from xml.parsers.expat import ExpatError from datetime import date import time -from librarian import ValidationError, NoDublinCore, ParseError, DCNS, RDFNS +from librarian import (ValidationError, NoDublinCore, ParseError, DCNS, RDFNS, + WLURI) import lxml.etree as etree # ElementTree API using libxml2 from lxml.etree import XMLSyntaxError @@ -117,37 +118,48 @@ class Field(object): return self.validate_value(f) + 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 = 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 = (field,) + fields + + class_dict['FIELDS'] = 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('title'), 'title'), + Field( DCNS('type'), 'type', required=False, multiple=True), + 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( 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('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'), - Field( DCNS('description'), 'description', required=False), - ) - - @property - def slug(self): - return self.url.rsplit('/', 1)[1] + Field( DCNS('identifier.url'), 'url', WLURI), + ) @classmethod def from_string(cls, xml): @@ -186,7 +198,7 @@ class BookInfo(object): 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(".//" + RDFNS('Description') ) + desc = rdf_tag.find(".//" + RDFNS('Description')) if desc is None: raise NoDublinCore("No DublinCore section found.") @@ -196,7 +208,7 @@ class BookInfo(object): 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. @@ -212,6 +224,11 @@ class BookInfo(object): 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] @@ -268,7 +285,8 @@ class BookInfo(object): if len(v) == 0: continue for x in v: e = etree.Element(field.uri) - e.text = unicode(x) + if x is not None: + e.text = unicode(x) description.append(e) else: e = etree.Element(field.uri) @@ -277,7 +295,6 @@ class BookInfo(object): return root - def serialize(self): rdf = {} rdf['about'] = { 'uri': RDFNS('about'), 'value': self.about } @@ -288,7 +305,7 @@ class BookInfo(object): 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 ] + v = [ unicode(x) for x in v if x is not None ] else: v = unicode(v) @@ -304,7 +321,7 @@ class BookInfo(object): 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 ] + v = [ unicode(x) for x in v if x is not None ] else: v = unicode(v) result[field.name] = v @@ -315,5 +332,24 @@ class BookInfo(object): 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('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('relation.hasPart'), 'parts', WLURI, multiple=True, required=False), + Field( DCNS('rights.license'), 'license', required=False), + Field( DCNS('rights'), 'license_description'), + Field( DCNS('language'), 'language'), + Field( DCNS('description'), 'description', required=False), + ) + + +def parse(file_name, cls=BookInfo): + return cls.from_file(file_name)