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viaf.py
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Wed, Jul 24, 00:32

viaf.py
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from urllib2 import urlopen
from lxml import etree
from invenio_formatter.engine import BibFormatObject
CFG_VIAF_WIKIPEDIA_LINK_BFO_FIELD = "856"
CFG_VIAF_LINK_NAME_LABEL_SUBFIELD = 'n'
CFG_VIAF_WIKIPEDIA_NAME_VALUE_SUBFIELD = 'wikipedia'
CFG_VIAF_WIKIPEDIA_LINK_SUBFIELD = 'a'
def get_wikipedia_link(viaf_id):
## Query viaf api and parse results
url = "http://viaf.org/viaf/" + str(viaf_id) +"/viaf.xml"
string_xml = urlopen(url).read()
xml = etree.fromstring(str(string_xml))
## Do an xpath query for all the wikipedia links
## that can be found for the author and return the first one
author_wikipedia_id = xml.xpath("/ns2:VIAFCluster/ns2:sources/ns2:source[contains(text(),'WKP')]/@nsid",namespaces={"ns2":"http://viaf.org/viaf/terms#"})
url_to_wikipedia = None
if type(author_wikipedia_id) is list and author_wikipedia_id:
author_wikipedia_id = author_wikipedia_id[0]
url_to_wikipedia = "http://www.wikipedia.com/wiki/"+author_wikipedia_id
return url_to_wikipedia
def get_wiki_link_from_record(bfo):
link = None
fields = []
if type(bfo) is BibFormatObject:
fields = bfo.fields(CFG_VIAF_WIKIPEDIA_LINK_BFO_FIELD)
else:
fields = bfo.get(CFG_VIAF_WIKIPEDIA_LINK_BFO_FIELD,[])
for field in fields:
if type(field) is dict:
if field.get(CFG_VIAF_LINK_NAME_LABEL_SUBFIELD,None) == CFG_VIAF_WIKIPEDIA_NAME_VALUE_SUBFIELD:
link = field.get(CFG_VIAF_WIKIPEDIA_LINK_SUBFIELD,None)
else:
record_dict = {}
for subfields in field:
if type(subfields) is list:
for subfield in subfields:
record_dict[subfield[0]] = subfield[1]
if record_dict.get(CFG_VIAF_LINK_NAME_LABEL_SUBFIELD,None) == CFG_VIAF_WIKIPEDIA_NAME_VALUE_SUBFIELD:
link = record_dict.get(CFG_VIAF_WIKIPEDIA_LINK_SUBFIELD,None)
return link

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