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JournalHintService.py
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JournalHintService.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2014 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.
"""
JournalHint service to display
"Were you looking for a journal reference? Try: <link>"
when the request is a journal reference
"""
from invenio.websearch_services import SearchService
from invenio.config import (CFG_SITE_URL,
CFG_SITE_LANG)
from invenio.messages import gettext_set_language
from invenio.search_engine import perform_request_search, print_record
from invenio.webuser import collect_user_info
from urllib import urlencode
import re
from cgi import escape
__plugin_version__ = "Search Service Plugin API 1.0"
class JournalHintService(SearchService):
"""Give hints on how to search the journal reference."""
re_dot_comma_year = re.compile(r',|\([0-9]{4}\)')
re_keyword = re.compile(
r'^((f|fin|find)\s+)|^([a-zA-Z0-9_-]+\:)',
re.IGNORECASE
)
@classmethod
def seems_a_journal_reference(cls, reference):
"""Quickly check if `name` seems to be a journal reference."""
# It must not be empty
if not reference.strip():
return False
# There must be a comma or a year in parentesis
if not cls.re_dot_comma_year.search(reference):
return False
# It must not start with a keyword
if cls.re_keyword.search(reference):
return False
return True
def get_description(self, ln=CFG_SITE_LANG):
"""Return service description."""
return "Give hints on how to search the journal reference"
def answer(self, req, user_info, of, cc,
colls_to_search, p, f, search_units, ln):
"""Answer question given by context.
Return (relevance, html_string) where relevance is integer
from 0 to 100 indicating how relevant to the question the
answer is (see C{CFG_WEBSEARCH_SERVICE_MAX_SERVICE_ANSWER_RELEVANCE}
for details), and html_string being a formatted answer.
"""
from invenio.refextract_api import search_from_reference
_ = gettext_set_language(ln)
if f or not self.seems_a_journal_reference(p):
return (0, "")
(field, pattern) = search_from_reference(p.decode('utf-8'))
if field is not "journal":
return (0, "")
recids = perform_request_search(
req=req, p=pattern, f=field, cc=cc, c=colls_to_search)
if not recids:
return (0, "")
if len(recids) == 1:
recid = recids.pop()
user_info = collect_user_info(req)
return (100, """\
<p><span class="journalhint">%s</span></p>
<table style="padding: 5px; border: 2px solid #ccc; margin: 20px"><tr><td>
%s
</td></tr></table>""" % (escape(_("Were you looking for this paper?")),
print_record(recid, ln=ln, user_info=user_info)))
query = "find rawref \"" + p + "\""
query_link = CFG_SITE_URL + '/search?' + urlencode({'p': query})
return (80, '<span class="journalhint">%s</span>' % (
_("Were you looking for a journal reference? Try: %(x_href)s") %
{"x_href": '<a href="{0}">{1}</a>'.format(
escape(query_link, True), escape(query))}, ))

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