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websearch_external_collections_utils.py
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Tue, Nov 19, 07:14

websearch_external_collections_utils.py
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# -*- coding: utf-8 -*-
## This file is part of CDS Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 CERN.
##
## CDS 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.
##
## CDS 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 CDS Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Some misc function for the external collections search.
"""
__revision__ = "$Id$"
import sys
from invenio.dbquery import run_sql
def get_verbose_print(req, prefix, cur_verbosity_level):
"""Return a function used to print verbose message."""
def vprint(verbosity_level, message):
"""Print a verbose message."""
if cur_verbosity_level >= verbosity_level:
req.write('<br /><span class="quicknote">' + prefix + message + '</span><br />')
return vprint
def warning(message):
"""Issue a warning alert."""
sys.stderr.write("WARNING: %(message)s\n" % locals())
# Collections function
collections_id = None
def collections_id_load(force_reload=False):
"""If needed, load the database for building the dictionary collection_name -> collection_id."""
global collections_id
if not (force_reload or collections_id is None):
return
collections_id = {}
results = run_sql("SELECT id, name FROM collection;")
for result in results:
collection_id = result[0]
name = result[1]
collections_id[name] = collection_id
def get_collection_id(name):
"""Return the id of a collection named 'name'."""
collections_id_load()
if collections_id.has_key(name):
return collections_id[name]
else:
return None
def get_collection_name_by_id(colid):
"""Return the name of collection with id 'id'."""
collections_id_load()
for (collection_name, collection_id) in collections_id.iteritems():
if collection_id == colid:
return collection_name
break
return None
def get_collection_descendants(id_dad):
"Returns list of all descendants of the collection having for id id_dad."
descendants = []
results = run_sql("SELECT id_son FROM collection_collection WHERE id_dad=%s",
(id_dad,))
for result in results:
id_son = int(result[0])
descendants.append(id_son)
descendants += get_collection_descendants(id_son)
return descendants

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