X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/5f2702eda7a1b36f4d29658b5468b6b78745218c..6791e72f5bb378973798e1d410f7bd42a346cc9e:/librarian/dcparser.py diff --git a/librarian/dcparser.py b/librarian/dcparser.py index 5a571ec..a7215a1 100644 --- a/librarian/dcparser.py +++ b/librarian/dcparser.py @@ -6,14 +6,23 @@ 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 = # ============== @@ -61,12 +70,47 @@ class Person(object): 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.") @@ -77,7 +121,7 @@ def as_unicode(text): 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) @@ -103,7 +147,15 @@ class Field(object): if self.multiple: if validator is None: return val - return [ 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: @@ -111,14 +163,28 @@ class Field(object): else: if validator is None or val[0] is None: return val[0] - return 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, strict=False): + 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: @@ -160,6 +226,9 @@ class WorkInfo(object): as_person, salias='editor', 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), @@ -217,14 +286,28 @@ class WorkInfo(object): 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, *args, **kwargs) - def __init__(self, rdf_attrs, dc_fields, strict=False): + 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. """ @@ -233,7 +316,8 @@ class WorkInfo(object): self.fmap = {} for field in self.FIELDS: - value = field.validate(dc_fields, strict=strict) + 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