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search_units.py
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Fri, Sep 13, 01:26

search_units.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2013 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.
"""WebTag Plugin for search_engine"""
from intbitset import intbitset
from flask.ext.login import current_user
from .models import \
WtgTAG, \
WtgTAGRecord, \
wash_tag_silent
def search_unit_in_tags(search_term):
"""
Return hitset of recIDs that are associated with any of
the tags in search_term
"""
results = intbitset()
# Names are comma-separated
# Multiple-word names can be in quotes -> remove those quotes
tag_names = \
[wash_tag_silent(tag_name.replace('"', ''))
for tag_name in search_term.split(',')]
if not tag_names:
return results
tag_names_filter = WtgTAG.name.in_(tag_names) if len(tag_names)>1 else WtgTAG.name == tag_names[0]
# Find tags matching the queries names
tags = WtgTAG.query\
.filter_by(id_user=current_user.get_id())\
.filter(tag_names_filter)\
.all()
tag_ids = [tag.id for tag in tags]
if not tag_ids:
# There were no tags matching the queried names
# return empty set
return results
# Find records tagged with those tags
associations = WtgTAGRecord.query\
.filter(WtgTAGRecord.id_tag.in_(tag_ids))\
.all()
for association in associations:
results += association.id_bibrec
return results

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