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bfe_doi.py
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Sun, Jun 30, 13:52

bfe_doi.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2011, 2012 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""BibFormat element - Prints DOIs
"""
from invenio.legacy.search_engine import get_field_tags
from cgi import escape
def format_element(bfo, tag="909C4", label="", separator="<br/> ", description_location=""):
"""
Return an HTML link to the DOI.
@param tag: field (tag + indicators) where the DOI can be found, if not specified, we take the tags asociated to the 'doi' logical field
@param separator: the separator between multiple tags
@param description_location: where should the description be added: if empty, the description is not printed; possible values: 'front', 'label', 'end'
@param label: label to use for the DOI link. If not specified, use the DOI number as label for the link.
"""
fields = []
doi_tags = get_field_tags('doi') #first check the tags table
for doi_tag in doi_tags:
fields = bfo.fields(doi_tag[:5]) #we want only the tag, without the subfields
if fields:
break
if not fields:
fields = bfo.fields(tag)
doi_list = []
for field in fields:
if field.get('2', 'DOI') == 'DOI' and 'a' in field:
desc = field.get('y', '')
front = end = ''
if desc:
if description_location == 'front':
front = desc + ': '
elif description_location == 'label':
label = desc
elif description_location == 'end':
end = ' (' + desc + ')'
else:
front = end = ''
doi_list.append((field['a'], front, end, label))
if doi_list:
doi_link = """%s<a href="http://dx.doi.org/%s" title="DOI" target="_blank">%s</a>%s"""
return separator.join([doi_link % (escape(front), escape(doi, True), label and escape(label) or escape(doi), end) for (doi, front, end, label) in doi_list])
else:
return ""
def escape_values(bfo):
"""
Called by BibFormat in order to check if output of this element
should be escaped.
"""
return 0

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