webbasket_dblayer.py
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webbasket_dblayer.py
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	# -- coding: utf-8 --
	##
	## This file is part of Invenio.
	## Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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.

	""" Database related functions for webbasket module """

	__revision__ = "$Id$"

	from zlib import decompress
	from zlib import compress
	from time import localtime
	from invenio.textutils import encode_for_xml

	from invenio.dbquery import run_sql
	from invenio.webcomment import get_reply_order_cache_data
	from invenio.webbasket_config import CFG_WEBBASKET_SHARE_LEVELS, \
	CFG_WEBBASKET_ACTIONS, \
	CFG_WEBBASKET_SHARE_LEVELS_ORDERED, \
	CFG_WEBBASKET_MAX_COMMENT_THREAD_DEPTH
	from invenio.config import CFG_SITE_URL
	from invenio.dateutils import convert_datestruct_to_datetext
	from invenio.websession_config import CFG_WEBSESSION_USERGROUP_STATUS
	from invenio.search_engine import get_fieldvalues

	########################### Table of contents ################################
	#
	# NB. functions preceeded by a star use usergroup table
	#
	# 1. General functions
	# - count_baskets
	# - check_user_owns_basket
	# - get_max_user_rights_on_basket
	#
	# 2. Personal baskets
	# - get_personal_baskets_info_for_topic
	# - get_all_personal_basket_ids_and_names_by_topic
	# - get_all_personal_baskets_names
	# - get_basket_name
	# - is_personal_basket_valid
	# - is_topic_valid
	# - get_basket_topic
	# - get_personal_topics_infos
	# - rename_basket
	# - rename_topic
	# - move_baskets_to_topic
	# - delete_basket
	# - create_basket
	#
	# 3. Actions on baskets
	# - get_basket_record
	# - get_basket_content
	# - get_basket_item
	# - get_basket_item_title_and_URL
	# - share_basket_with_group
	# - update_rights
	# - move_item
	# - delete_item
	# - add_to_basket
	# - get_external_records_by_collection
	# - store_external_records
	# - store_external_urls
	# - store_external_source
	# - get_external_colid_and_url
	#
	# 4. Group baskets
	# - get_group_basket_infos
	# - get_group_name
	# - get_all_group_basket_ids_and_names_by_group
	# - (*) get_all_group_baskets_names
	# - is_shared_to
	#
	# 5. External baskets (baskets user has subscribed to)
	# - get_external_baskets_infos
	# - get_external_basket_info
	# - get_all_external_basket_ids_and_names
	# - count_external_baskets
	# - get_all_external_baskets_names
	#
	# 6. Public baskets (interface to subscribe to baskets)
	# - get_public_basket_infos
	# - get_public_basket_info
	# - get_basket_general_infos
	# - get_basket_owner_id
	# - count_public_baskets
	# - get_public_baskets_list
	# - is_basket_public
	# - subscribe
	# - unsubscribe
	# - is_user_subscribed_to_basket
	# - count_subscribers
	# - (*) get_groups_subscribing_to_basket
	# - get_rights_on_public_basket
	#
	# 7. Annotating
	# - get_notes
	# - get_note
	# - save_note
	# - delete_note
	# - note_belongs_to_item_in_basket_p
	#
	# 8. Usergroup functions
	# - (*) get_group_infos
	# - count_groups_user_member_of
	# - (*) get_groups_user_member_of
	#
	# 9. auxilliary functions
	# - __wash_sql_count
	# - __decompress_last
	# - create_pseudo_record
	# - prettify_url

	########################## General functions ##################################

	def count_baskets(uid):
	"""Return (nb personal baskets, nb group baskets, nb external
	baskets) tuple for given user"""
	query1 = "SELECT COUNT(id) FROM bskBASKET WHERE id_owner=%s"
	res1 = run_sql(query1, (int(uid),))
	personal = __wash_sql_count(res1)
	query2 = """SELECT count(ugbsk.id_bskbasket)
	FROM usergroup_bskBASKET ugbsk LEFT JOIN user_usergroup uug
	ON ugbsk.id_usergroup=uug.id_usergroup
	WHERE uug.id_user=%s AND uug.user_status!=%s
	GROUP BY ugbsk.id_usergroup"""
	params = (int(uid), CFG_WEBSESSION_USERGROUP_STATUS['PENDING'])
	res2 = run_sql(query2, params)
	if len(res2):
	groups = reduce(lambda x, y: x + y, map(lambda x: x[0], res2))
	else:
	groups = 0
	external = count_external_baskets(uid)
	return (personal, groups, external)

	def check_user_owns_baskets(uid, bskids):
	""" Return 1 if user is owner of every basket in list bskids"""
	if not((type(bskids) is list) or (type(bskids) is tuple)):
	bskids = [bskids]
	query = """SELECT id_owner FROM bskBASKET WHERE %s GROUP BY id_owner"""
	sep = ' OR '
	query %= sep.join(['id=%s'] * len(bskids))
	res = run_sql(query, tuple(bskids))
	if len(res)==1 and int(res[0][0])==uid:
	return 1
	else:
	return 0

	def get_max_user_rights_on_basket(uid, bskid):
	"""Return the max rights a user has on this basket"""
	query_owner = "SELECT count(id_owner) FROM bskBASKET WHERE id_owner=%s and id=%s"
	params_owner = (int(uid), int(bskid))
	res = run_sql(query_owner, params_owner)
	if res and res[0][0]:
	# if this user is owner of this baskets he can do anything he wants.
	return CFG_WEBBASKET_SHARE_LEVELS['MANAGE']
	# not owner => group member ?
	query_group_baskets = """
	SELECT share_level
	FROM user_usergroup AS ug LEFT JOIN usergroup_bskBASKET AS ub
	ON ug.id_usergroup=ub.id_usergroup
	WHERE ug.id_user=%s AND ub.id_bskBASKET=%s AND NOT(ub.share_level='NO') AND ug.user_status!=%s
	"""
	params_group_baskets = (int(uid), int(bskid), CFG_WEBSESSION_USERGROUP_STATUS['PENDING'])
	res = run_sql(query_group_baskets, params_group_baskets)
	group_index = None
	if res:
	try:
	group_index = CFG_WEBBASKET_SHARE_LEVELS_ORDERED.index(res[0][0])
	except:
	return None
	# public basket ?
	query_public_baskets = """
	SELECT share_level
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0 AND id_bskBASKET=%s
	"""
	public_index = None
	res = run_sql(query_public_baskets, (int(bskid),))
	if res:
	try:
	public_index = CFG_WEBBASKET_SHARE_LEVELS_ORDERED.index(res[0][0])
	except:
	return None
	if group_index or public_index:
	if group_index > public_index:
	return CFG_WEBBASKET_SHARE_LEVELS_ORDERED[group_index]
	else:
	return CFG_WEBBASKET_SHARE_LEVELS_ORDERED[public_index]
	return None

	########################### Personal baskets ##################################

	def get_personal_baskets_info_for_topic(uid, topic):
	"""Return information about every basket that belongs to the given user and topic."""

	query = """ SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	count(rec.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(rec.date_added), '%%Y-%%m-%%d %%H:%%i:%%s')
	FROM user_bskBASKET AS ubsk
	JOIN bskBASKET AS bsk
	ON bsk.id=ubsk.id_bskBASKET
	AND bsk.id_owner=%s
	LEFT JOIN bskREC AS rec
	ON rec.id_bskBASKET=bsk.id
	WHERE ubsk.id_user=%s
	AND ubsk.topic=%s
	GROUP BY bsk.id
	ORDER BY bsk.name"""

	params = (uid, uid, topic)

	res = run_sql(query, params)

	return res

	def get_all_user_personal_basket_ids_by_topic(uid):
	"""For a given user return all their personal basket ids grouped by topic."""

	query = """ SELECT ubsk.topic,
	GROUP_CONCAT(bsk.id)
	FROM user_bskBASKET AS ubsk
	JOIN bskBASKET AS bsk
	ON ubsk.id_bskBASKET=bsk.id
	AND ubsk.id_user=bsk.id_owner
	WHERE bsk.id_owner=%s
	GROUP BY ubsk.topic
	ORDER BY ubsk.topic"""
	params = (uid,)
	res = run_sql(query, params)

	return res

	def get_all_personal_baskets_names(uid):
	""" for a given user, returns every basket he is owner of
	returns list of tuples: (bskid, bsk_name, topic)
	"""
	query = """
	SELECT bsk.id,
	bsk.name,
	ubsk.topic
	FROM user_bskBASKET ubsk JOIN bskBASKET bsk
	ON ubsk.id_bskBASKET=bsk.id
	AND ubsk.id_user=bsk.id_owner
	WHERE bsk.id_owner=%s
	ORDER BY ubsk.topic
	"""
	params = (int(uid),)
	return run_sql(query, params)

	def get_basket_name(bskid):
	"""return the name of a given basket"""
	query = 'SELECT name FROM bskBASKET where id=%s'
	res = run_sql(query, (int(bskid), ))
	if res:
	return res[0][0]
	else:
	return ''

	def is_personal_basket_valid(uid, bskid):
	"""Check if the basked (bskid) belongs to user (uid) and is valid."""

	query = """ SELECT id
	FROM bskBASKET
	WHERE id=%s
	AND id_owner=%s"""
	params = (bskid, uid)
	res = run_sql(query, params)

	return res

	def is_topic_valid(uid, topic):
	"""Check if the topic defined by user (uid) exists."""

	query = """ SELECT distinct(topic)
	FROM user_bskBASKET
	WHERE topic=%s
	AND id_user=%s"""
	params = (topic, uid)
	res = run_sql(query, params)

	return res

	def get_basket_topic(uid, bskid):
	"""Return the name of the topic this basket (bskid) belongs to."""

	query = """ SELECT topic
	FROM user_bskBASKET
	WHERE id_bskBASKET=%s
	AND id_user=%s"""
	params = (bskid,uid)
	res = run_sql(query, params)

	return res

	def get_personal_topics_infos(uid):
	"""
	Get the list of every topic user has defined,
	and the number of baskets in each topic
	@param uid: user id (int)
	@return: a list of tuples (topic name, nb of baskets)
	"""
	query = """SELECT topic, count(b.id)
	FROM user_bskBASKET ub JOIN bskBASKET b
	ON ub.id_bskBASKET=b.id AND
	b.id_owner=ub.id_user
	WHERE ub.id_user=%s
	GROUP BY topic
	ORDER BY topic"""
	uid = int(uid)
	res = run_sql(query, (uid,))
	return res

	def get_basket_ids_and_names(bskids, limit=0):
	"""For the given basket ids, return their ids and names,
	ordered by basket name.
	If 'limit' is greater than 0, limit the number of results returned."""

	if not((type(bskids) is list) or (type(bskids) is tuple)):
	bskids = [bskids]

	query = """ SELECT bsk.id,
	bsk.name
	FROM bskBASKET AS bsk
	WHERE %s
	ORDER BY bsk.name
	%s"""
	sep = ' OR '
	query %= (sep.join(['id=%s'] * len(bskids)), limit and 'LIMIT %i' % limit or '')

	params = tuple(bskids)

	res = run_sql(query, params)

	return res

	def rename_basket(bskid, new_name):
	"""Rename basket to new_name"""
	run_sql("UPDATE bskBASKET SET name=%s WHERE id=%s", (new_name, bskid))

	def rename_topic(uid, old_topic, new_topic):
	"""Rename topic to new_topic """
	res = run_sql("UPDATE user_bskBASKET SET topic=%s WHERE id_user=%s AND topic=%s",
	(new_topic, uid, old_topic))
	return res

	def move_baskets_to_topic(uid, bskids, new_topic):
	"""Move given baskets to another topic"""
	if not((type(bskids) is list) or (type(bskids) is tuple)):
	bskids = [bskids]
	query = "UPDATE user_bskBASKET SET topic=%s WHERE id_user=%s AND ("
	query += ' OR '.join(['id_bskBASKET=%s'] * len(bskids))
	query += ")"
	params = (new_topic, uid) + tuple(bskids)
	res = run_sql(query, params)
	return res

	def delete_basket(bskid):
	"""Delete given basket."""

	# TODO: check if any alerts are automaticly adding items to the given basket.
	bskid = int(bskid)

	query1 = "DELETE FROM bskBASKET WHERE id=%s"
	res = run_sql(query1, (bskid,))

	query2A = "SELECT id_bibrec_or_bskEXTREC FROM bskREC WHERE id_bskBASKET=%s"
	local_and_external_ids = run_sql(query2A, (bskid,))
	external_ids = [local_and_external_id[0] for local_and_external_id in \
	local_and_external_ids if local_and_external_id[0]<0]
	for external_id in external_ids:
	delete_item(bskid=bskid, recid=external_id, update_date_modification=False)

	query2B = "DELETE FROM bskREC WHERE id_bskBASKET=%s"
	run_sql(query2B, (bskid,))

	query3 = "DELETE FROM bskRECORDCOMMENT WHERE id_bskBASKET=%s"
	run_sql(query3, (bskid,))

	query4 = "DELETE FROM user_bskBASKET WHERE id_bskBASKET=%s"
	run_sql(query4, (bskid,))

	query5 = "DELETE FROM usergroup_bskBASKET WHERE id_bskBASKET=%s"
	run_sql(query5, (bskid,))

	query6 = "DELETE FROM user_query_basket WHERE id_basket=%s"
	run_sql(query6, (bskid,))

	return int(res)

	def create_basket(uid, basket_name, topic):
	"""Create new basket for given user in given topic"""
	now = convert_datestruct_to_datetext(localtime())
	id_bsk = run_sql("""INSERT INTO bskBASKET (id_owner, name, date_modification)
	VALUES (%s, %s, %s)""",
	(uid, basket_name, now))
	run_sql("""INSERT INTO user_bskBASKET (id_user, id_bskBASKET, topic)
	VALUES (%s, %s, %s)""",
	(uid, id_bsk, topic))
	return id_bsk

	def get_all_items_in_user_personal_baskets(uid,
	topic="",
	format='hb'):
	"""For the specified user, return all the items in their personal baskets,
	grouped by basket if local or as a list if external.
	If topic is set, return only that topic's items."""

	if topic:
	topic_clause = """AND ubsk.topic=%s"""
	params_local = (uid, uid, topic)
	params_external = (uid, uid, topic, format)
	else:
	topic_clause = ""
	params_local = (uid, uid)
	params_external = (uid, uid, format)

	query_local = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ubsk.topic,
	GROUP_CONCAT(rec.id_bibrec_or_bskEXTREC)
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	AND bsk.id_owner=%%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=rec.id_bskBASKET
	AND ubsk.id_user=%%s
	%s
	WHERE rec.id_bibrec_or_bskEXTREC > 0
	GROUP BY rec.id_bskBASKET""" % (topic_clause,)

	res_local = run_sql(query_local, params_local)

	query_external = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ubsk.topic,
	rec.id_bibrec_or_bskEXTREC,
	ext.value
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	AND bsk.id_owner=%%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=rec.id_bskBASKET
	AND ubsk.id_user=%%s
	%s
	JOIN bskEXTFMT AS ext
	ON ext.id_bskEXTREC=-rec.id_bibrec_or_bskEXTREC
	AND ext.format=%%s
	WHERE rec.id_bibrec_or_bskEXTREC < 0
	ORDER BY rec.id_bskBASKET""" % (topic_clause,)

	res_external = run_sql(query_external, params_external)

	return (res_local, res_external)

	def get_all_items_in_user_personal_baskets_by_matching_notes(uid,
	topic="",
	p=""):
	"""For the specified user, return all the items in their personal baskets
	matching their notes' titles and bodies, grouped by basket.
	If topic is set, return only that topic's items."""

	p = p and '%' + p + '%' or '%'

	if topic:
	topic_clause = """AND ubsk.topic=%s"""
	params = (uid, uid, topic, p, p)
	else:
	topic_clause = ""
	params = (uid, uid, p, p)

	query = """ SELECT notes.id_bskBASKET,
	bsk.name,
	ubsk.topic,
	GROUP_CONCAT(DISTINCT(notes.id_bibrec_or_bskEXTREC))
	FROM bskRECORDCOMMENT AS notes
	JOIN bskBASKET AS bsk
	ON bsk.id=notes.id_bskBASKET
	AND bsk.id_owner=%%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=notes.id_bskBASKET
	AND ubsk.id_user=%%s
	%s
	WHERE notes.title like %%s
	OR notes.body like %%s
	GROUP BY notes.id_bskBASKET""" % (topic_clause,)

	res = run_sql(query, params)

	return res

	def get_all_user_topics(uid):
	"""Return a list of the user's topics."""

	query = """ SELECT ubsk.topic
	FROM bskBASKET AS bsk
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=bsk.id
	AND ubsk.id_user=bsk.id_owner
	WHERE bsk.id_owner=%s
	GROUP BY ubsk.topic"""
	params = (uid,)
	res = run_sql(query, params)
	return res

	########################## Actions on baskets #################################

	def get_basket_record(bskid, recid, format='hb'):
	"""get record recid in basket bskid
	"""
	if recid < 0:
	rec_table = 'bskEXTREC'
	format_table = 'bskEXTFMT'
	id_field = 'id_bskEXTREC'
	sign = '-'
	else:
	rec_table = 'bibrec'
	format_table = 'bibfmt'
	id_field = 'id_bibrec'
	sign = ''
	query = """
	SELECT DATE_FORMAT(record.creation_date, '%%%%Y-%%%%m-%%%%d %%%%H:%%%%i:%%%%s'),
	DATE_FORMAT(record.modification_date, '%%%%Y-%%%%m-%%%%d %%%%H:%%%%i:%%%%s'),
	DATE_FORMAT(bskREC.date_added, '%%%%Y-%%%%m-%%%%d %%%%H:%%%%i:%%%%s'),
	user.nickname,
	count(cmt.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(cmt.date_creation), '%%%%Y-%%%%m-%%%%d %%%%H:%%%%i:%%%%s'),
	fmt.value

	FROM bskREC LEFT JOIN user
	ON bskREC.id_user_who_added_item=user.id
	LEFT JOIN bskRECORDCOMMENT cmt
	ON bskREC.id_bibrec_or_bskEXTREC=cmt.id_bibrec_or_bskEXTREC
	LEFT JOIN %(rec_table)s record
	ON (%(sign)sbskREC.id_bibrec_or_bskEXTREC=record.id)
	LEFT JOIN %(format_table)s fmt
	ON (record.id=fmt.%(id_field)s)

	WHERE bskREC.id_bskBASKET=%%s AND
	bskREC.id_bibrec_or_bskEXTREC=%%s AND
	fmt.format=%%s

	GROUP BY bskREC.id_bibrec_or_bskEXTREC
	""" % {'rec_table': rec_table,
	'sign': sign,
	'format_table': format_table,
	'id_field':id_field}
	params = (int(bskid), int(recid), format)
	res = run_sql(query, params)
	if res:
	return __decompress_last(res[0])
	return ()

	def get_basket_content(bskid, format='hb'):
	"""Get all records for a given basket."""

	query = """ SELECT rec.id_bibrec_or_bskEXTREC,
	extrec.collection_id,
	count(cmt.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(cmt.date_creation), '%%Y-%%m-%%d %%H:%%i:%%s'),
	extern.value as ext_val,
	intern.value as int_val,
	rec.score

	FROM bskREC AS rec

	LEFT JOIN bskRECORDCOMMENT AS cmt
	ON (rec.id_bibrec_or_bskEXTREC=cmt.id_bibrec_or_bskEXTREC
	AND rec.id_bskBASKET=cmt.id_bskBASKET)

	LEFT JOIN bskEXTFMT AS extern
	ON (-rec.id_bibrec_or_bskEXTREC=extern.id_bskEXTREC
	AND extern.format=%s)

	LEFT JOIN bibfmt AS intern
	ON (rec.id_bibrec_or_bskEXTREC=intern.id_bibrec
	AND intern.format=%s)

	LEFT JOIN bskEXTREC AS extrec
	ON extrec.id=-rec.id_bibrec_or_bskEXTREC

	WHERE rec.id_bskBASKET=%s

	GROUP BY rec.id_bibrec_or_bskEXTREC

	ORDER BY rec.score"""

	params = (format, format, int(bskid))

	res = run_sql(query, params)

	if res:
	query2 = "UPDATE bskBASKET SET nb_views=nb_views+1 WHERE id=%s"
	run_sql(query2, (int(bskid),))
	return res
	return ()

	def get_basket_item(bskid, recid, format='hb'):
	"""Get item (recid) for a given basket."""

	query = """ SELECT rec.id_bibrec_or_bskEXTREC,
	extrec.collection_id,
	count(cmt.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(cmt.date_creation), '%%Y-%%m-%%d %%H:%%i:%%s'),
	extern.value as ext_val,
	intern.value as int_val,
	rec.score
	FROM bskREC rec
	LEFT JOIN bskRECORDCOMMENT cmt
	ON (rec.id_bibrec_or_bskEXTREC=cmt.id_bibrec_or_bskEXTREC
	AND
	rec.id_bskBASKET=cmt.id_bskBASKET)
	LEFT JOIN bskEXTFMT extern
	ON (-rec.id_bibrec_or_bskEXTREC=extern.id_bskEXTREC
	AND
	extern.format=%s)
	LEFT JOIN bibfmt intern
	ON (rec.id_bibrec_or_bskEXTREC=intern.id_bibrec
	AND
	intern.format=%s)
	LEFT JOIN bskEXTREC AS extrec
	ON extrec.id=-rec.id_bibrec_or_bskEXTREC
	WHERE rec.id_bskBASKET=%s
	AND rec.id_bibrec_or_bskEXTREC=%s
	GROUP BY rec.id_bibrec_or_bskEXTREC
	ORDER BY rec.score"""
	params = (format, format, bskid, recid)
	res = run_sql(query, params)
	if res:
	queryU = """UPDATE bskBASKET SET nb_views=nb_views+1 WHERE id=%s"""
	paramsU = (bskid,)
	run_sql(queryU, paramsU)
	score = res[0][6]
	query_previous = """SELECT id_bibrec_or_bskEXTREC
	FROM bskREC
	WHERE id_bskBASKET=%s
	AND score<%s
	ORDER BY score DESC
	LIMIT 1"""
	params_previous = (bskid, score)
	res_previous = run_sql(query_previous, params_previous)
	query_next = """SELECT id_bibrec_or_bskEXTREC
	FROM bskREC
	WHERE id_bskBASKET=%s
	AND score>%s
	ORDER BY score ASC
	LIMIT 1"""
	params_next = (bskid, score)
	res_next = run_sql(query_next, params_next)
	query_index = """ SELECT COUNT(id_bibrec_or_bskEXTREC)
	FROM bskREC
	WHERE id_bskBASKET=%s
	AND score<=%s
	ORDER BY score"""
	params_index = (bskid, score)
	res_index = run_sql(query_index, params_index)
	res_index = __wash_sql_count(res_index)
	return (res[0], res_previous and res_previous[0][0] or 0, res_next and res_next[0][0] or 0, res_index)
	else:
	return ()

	def get_basket_item_title_and_URL(recid):
	"""
	Retrieves the title and URL for the specified item in the specified basket.

	@param bskid: The basked id
	@type bskid: int

	@param recid: The record (item) id
	@type recid: int

	@return: A tuple containing the title as a sting and the URL as a string.
	"""

	if recid > 0:
	# This is a local record, we can easily retrieve the title using the
	# search engine's get_fieldvalues function and the MARC field and tag.
	title_list = get_fieldvalues(recid, '245___')
	# Check if the main title is always the first element in the list
	if title_list:
	title = title_list[0]
	else:
	title = ""
	url = '%s/record/%i' % (CFG_SITE_URL, recid)
	elif recid < 0:
	# This is an external record or item, use
	title = "This is an external record or item."
	url = '%s' % (CFG_SITE_URL,)

	query = """ SELECT rec.collection_id,
	rec.original_url,
	fmt.value
	FROM bskEXTREC as rec,
	bskEXTFMT as fmt
	WHERE rec.id=%s
	AND fmt.id_bskEXTREC=%s
	AND fmt.format='hb'"""
	params = (-recid, -recid)
	result = run_sql(query, params)
	if result:
	item = __decompress_last(result[0])
	collection = item[0]
	url = item[1]
	hb = item[2]
	if collection == 0:
	# This is an external item
	title = hb.split('\n',1)[0]
	elif collection > 0:
	# This is an external record from a hosted collection
	title = hb.split('</strong>',1)[0].split('<strong>')[-1]

	return (title, url)

	def share_basket_with_group(bskid, group_id,
	share_level=CFG_WEBBASKET_SHARE_LEVELS['READITM']):
	""" Share basket bskid with group group_id with given share_level
	@param share_level: see CFG_WEBBASKET_SHARE_LEVELS in webbasket_config
	"""
	now = convert_datestruct_to_datetext(localtime())
	run_sql("""REPLACE INTO usergroup_bskBASKET
	(id_usergroup, id_bskBASKET, date_shared, share_level)
	VALUES (%s,%s,%s,%s)""",
	(group_id, bskid, now, str(share_level)))

	def update_rights(bskid, group_rights):
	"""update rights (permissions) for groups.
	@param bskid: basket id
	@param group_rights: dictionary of {group id: new rights}
	"""
	now = convert_datestruct_to_datetext(localtime())
	query1 = """REPLACE INTO usergroup_bskBASKET
	(id_usergroup, id_bskBASKET, date_shared, share_level)
	VALUES """ + \
	', '.join(["(%s, %s, %s, %s)"] * len(group_rights.items()))

	params = ()
	for (group_id, share_level) in group_rights.items():
	params += (int(group_id), int(bskid), now, str(share_level))

	run_sql(query1, params)
	query2 = """DELETE FROM usergroup_bskBASKET WHERE share_level='NO'"""
	run_sql(query2)

	def move_item(bskid, recid, direction):
	"""Change score of an item in a basket"""
	bskid = int(bskid)
	query1 = """SELECT id_bibrec_or_bskEXTREC,
	score
	FROM bskREC
	WHERE id_bskBASKET=%s
	ORDER BY score, date_added"""
	items = run_sql(query1, (bskid,))
	(recids, scores) = zip(*items)
	(recids, scores) = (list(recids), list(scores))
	if len(recids) and recid in recids:
	current_index = recids.index(recid)
	if direction == CFG_WEBBASKET_ACTIONS['UP']:
	switch_index = 0
	if current_index != 0:
	switch_index = current_index -1
	else:
	switch_index = len(recids) - 1
	if current_index != len(recids)-1:
	switch_index = current_index + 1
	query2 = """UPDATE bskREC
	SET score=%s
	WHERE id_bskBASKET=%s AND id_bibrec_or_bskEXTREC=%s"""
	res1 = run_sql(query2, (scores[switch_index], bskid, recids[current_index]))
	res2 = run_sql(query2, (scores[current_index], bskid, recids[switch_index]))
	if res1 and res2:
	now = convert_datestruct_to_datetext(localtime())
	query3 = "UPDATE bskBASKET SET date_modification=%s WHERE id=%s"
	params3 = (now, int(bskid))
	run_sql(query3, params3)

	def delete_item(bskid, recid, update_date_modification=True):
	"""Remove item recid from basket bskid"""

	if recid < 0:
	query0A = "select count(id_bskBASKET) from bskREC where id_bibrec_or_bskEXTREC=%s" % (int(recid))
	ncopies = run_sql(query0A)
	if ncopies and ncopies[0][0]<=1:
	# uncomment the following 5 lines and comment the following 2 to delete cached records
	# only for external sources and not for external records
	#query0B = "SELECT collection_id FROM bskEXTREC WHERE id=%s" % (-int(recid))
	#colid = run_sql(query0B)
	#if colid and colid[0][0]==0:
	#query0C = "DELETE from bskEXTFMT WHERE id_bskEXTREC=%s" % (-int(recid))
	#run_sql(query0C)
	# the following two lines delete cached external records. We could keep them if we find
	# a way to reuse them in case the external records are added again in the future.
	query0D = "DELETE from bskEXTFMT WHERE id_bskEXTREC=%s" % (-int(recid))
	run_sql(query0D)
	query0E = "DELETE from bskEXTREC WHERE id=%s" % (-int(recid))
	run_sql(query0E)
	query_notes = "DELETE FROM bskRECORDCOMMENT WHERE id_bskBASKET=%s AND id_bibrec_or_bskEXTREC=%s"
	run_sql(query_notes, (bskid, recid,))
	query1 = "DELETE from bskREC WHERE id_bskBASKET=%s AND id_bibrec_or_bskEXTREC=%s"
	params1 = (int(bskid), int(recid))
	res = run_sql(query1, params1)
	if update_date_modification and res:
	now = convert_datestruct_to_datetext(localtime())
	query2 = "UPDATE bskBASKET SET date_modification=%s WHERE id=%s"
	params2 = (now, int(bskid))
	run_sql(query2, params2)
	return res

	def add_to_basket(uid,
	recids=[],
	colid=0,
	bskid=0,
	es_title="",
	es_desc="",
	es_url=""):
	"""Add items (recids) basket (bskid)."""
	if (recids or (colid == -1 and es_title and es_desc and es_url)) and bskid > 0:
	query_max_score = """ SELECT MAX(score)
	FROM bskREC
	WHERE id_bskBASKET=%s"""
	params_max_score = (bskid,)
	res_max_score = run_sql(query_max_score, params_max_score)
	max_score = __wash_sql_count(res_max_score)
	if not max_score:
	# max_score == None actually means that the basket doesn't exist.
	# Maybe we should return 0 and inform the admin?
	max_score = 1

	if colid > 0:
	query_existing = """ SELECT id,
	external_id
	FROM bskEXTREC
	WHERE %s
	AND collection_id=%s"""
	sep_or = ' OR '
	query_existing %= (sep_or.join(['external_id=%s'] * len(recids)), colid)
	params_existing = tuple(recids)
	res_existing = run_sql(query_existing, params_existing)
	existing_recids = [int(external_ids_couple[1]) for external_ids_couple in res_existing]
	existing_ids = [int(ids[0]) for ids in res_existing]
	new_recids = [recid for recid in recids if int(recid) not in existing_recids]
	# sets approach
	#existing_recids = [ids[1] for ids in res_existing]
	#new_recids = list(set(recids)-set(existing_recids))
	if new_recids:
	query_new = """ INSERT INTO bskEXTREC (external_id,
	collection_id,
	creation_date,
	modification_date)
	VALUES """
	now = convert_datestruct_to_datetext(localtime())
	records = ["(%s, %s, %s, %s)"] * len(new_recids)
	query_new += ', '.join(records)
	params_new = ()
	for new_recid in new_recids:
	params_new += (int(new_recid), colid, now, now)
	res_new = run_sql(query_new, params_new)
	recids = [-int(recid) for recid in existing_ids]
	recids.extend(range(-res_new,-(res_new+len(new_recids)),-1))
	else:
	recids = [-int(recid) for recid in existing_ids]
	elif colid < 0:
	query_external = """INSERT INTO bskEXTREC (collection_id,
	original_url,
	creation_date,
	modification_date)
	VALUES (%s, %s, %s, %s)"""
	now = convert_datestruct_to_datetext(localtime())
	params_external = (colid, es_url, now, now)
	res_external = run_sql(query_external, params_external)
	recids = [-res_external]
	store_external_source(res_external, es_title, es_desc, es_url, 'xm')
	store_external_source(res_external, es_title, es_desc, es_url, 'hb')

	query_insert = """ INSERT IGNORE INTO bskREC
	(id_bibrec_or_bskEXTREC,
	id_bskBASKET,
	id_user_who_added_item,
	date_added,
	score)
	VALUES """
	if colid == 0 or (colid > 0 and not new_recids):
	now = convert_datestruct_to_datetext(localtime())
	records = ["(%s, %s, %s, %s, %s)"] * len(recids)
	query_insert += ', '.join(records)
	params_insert = ()
	i = 1
	for recid in recids:
	params_insert += (recid, bskid, uid, now, max_score + i)
	i += 1
	run_sql(query_insert, params_insert)

	query_update = """ UPDATE bskBASKET
	SET date_modification=%s
	WHERE id=%s"""
	params_update = (now, bskid)
	run_sql(query_update, params_update)
	return recids
	return 0

	def add_to_many_baskets(uid, recids=[], colid=0, bskids=[], es_title="", es_desc="", es_url=""):
	"""Add items recids to every basket in bskids list."""
	if (len(recids) or colid == -1) and len(bskids):
	query1 = """SELECT id_bskBASKET,
	max(score)
	FROM bskREC
	WHERE %s
	GROUP BY id_bskBASKET"""
	bskids = [bskid for bskid in bskids if int(bskid) >= 0]
	sep_or = ' OR '
	query1 %= sep_or.join(['id_bskBASKET=%s'] * len(bskids))
	bsks = dict.fromkeys(bskids, 0)
	params = tuple(bskids)
	bsks.update(dict(run_sql(query1, params)))

	if colid > 0:
	query2A = """SELECT id,
	external_id
	FROM bskEXTREC
	WHERE %s
	AND collection_id=%s"""
	query2A %= (sep_or.join(['external_id=%s'] * len(recids)), colid)
	params2A = tuple(recids)
	res2A = run_sql(query2A, params2A)
	existing_recids = [int(external_ids_couple[1]) for external_ids_couple in res2A]
	existing_ids = [int(ids[0]) for ids in res2A]
	new_recids = [recid for recid in recids if int(recid) not in existing_recids]
	# sets approach
	#existing_recids = [ids[1] for ids in res2A]
	#new_recids = list(set(recids)-set(existing_recids))
	if new_recids:
	query2B = """INSERT
	INTO bskEXTREC
	(external_id,
	collection_id,
	creation_date,
	modification_date)
	VALUES """
	now = convert_datestruct_to_datetext(localtime())
	records = ["(%s, %s, %s, %s)"] * len(new_recids)
	query2B += ', '.join(records)
	params2B = ()
	for new_recid in new_recids:
	params2B += (int(new_recid), colid, now, now)
	res = run_sql(query2B, params2B)
	recids = [-int(recid) for recid in existing_ids]
	recids.extend(range(-res,-(res+len(new_recids)),-1))
	else:
	recids = [-int(recid) for recid in existing_ids]
	elif colid < 0:
	query2C = """INSERT
	INTO bskEXTREC
	(collection_id,
	original_url,
	creation_date,
	modification_date)
	VALUES (%s, %s, %s, %s)"""
	now = convert_datestruct_to_datetext(localtime())
	params = (colid, es_url, now, now)
	res = run_sql(query2C, params)
	recids = [-res]
	store_external_source(res, es_title, es_desc, es_url, 'xm')
	store_external_source(res, es_title, es_desc, es_url, 'hb')

	query2 = """INSERT IGNORE
	INTO bskREC
	(id_bibrec_or_bskEXTREC,
	id_bskBASKET,
	id_user_who_added_item,
	date_added,
	score)
	VALUES """
	if colid == 0 or (colid > 0 and not new_recids):
	now = convert_datestruct_to_datetext(localtime())
	records = ["(%s, %s, %s, %s, %s)"] * (len(recids) * len(bsks.items()))
	query2 += ', '.join(records)
	params = ()
	for (bskid, max_score) in bsks.items():
	i = 1
	for recid in recids:
	params += (int(recid), int(bskid), int(uid), now, int(max_score) + i)
	i += 1
	run_sql(query2, params)

	query3 = """UPDATE bskBASKET
	SET date_modification=%s
	WHERE """
	query3 += sep_or.join(["id=%s"] * len(bskids))
	params = (now,) + tuple(bskids)
	run_sql(query3, params)
	return len(bskids)
	return 0

	def get_external_records_by_collection(recids):
	"""Get the selected recids, both local and external, grouped by collection."""

	if recids:
	query = """ SELECT GROUP_CONCAT(id),
	GROUP_CONCAT(external_id),
	collection_id
	FROM bskEXTREC
	WHERE %s
	GROUP BY collection_id"""

	recids = [-recid for recid in recids]
	sep_or = ' OR '
	query %= sep_or.join(['id=%s'] * len(recids))
	params = tuple(recids)
	res = run_sql(query,params)
	return res
	return 0

	def get_external_records(recids, of="hb"):
	"""Get formatted external records from the database."""

	if recids:
	query = """ SELECT rec.collection_id,
	fmt.id_bskEXTREC,
	fmt.value
	FROM bskEXTFMT AS fmt
	JOIN bskEXTREC AS rec
	ON rec.id=fmt.id_bskEXTREC
	WHERE format=%%s
	AND ( %s )"""
	recids = [-recid for recid in recids]
	sep_or = ' OR '
	query %= sep_or.join(['id_bskEXTREC=%s'] * len(recids))
	params = [of]
	params.extend(recids)
	params = tuple(params)
	res = run_sql(query,params)
	return res
	return ()

	def store_external_records(records, of="hb"):
	"""Store formatted external records to the database."""

	if records:
	query = """INSERT
	INTO bskEXTFMT
	(id_bskEXTREC,
	format,
	last_updated,
	value)
	VALUES """
	now = convert_datestruct_to_datetext(localtime())
	formatted_records = ["(%s, %s, %s, %s)"] * len(records)
	query += ', '.join(formatted_records)
	params = ()
	for record in records:
	params += (record[0], of, now, compress(record[1]))
	run_sql(query,params)

	def store_external_urls(ids_urls):
	"""Store original urls for external records to the database."""

	#for id_url in ids_urls.iteritems():
	for id_url in ids_urls:
	query = """UPDATE
	bskEXTREC
	SET original_url=%s
	WHERE id=%s"""
	params = (id_url[1], id_url[0])
	run_sql(query,params)

	def store_external_source(es_id, es_title, es_desc, es_url, of="hb"):
	"""Store formatted external sources to the database."""

	if es_id and es_title and es_desc:
	query = """INSERT INTO bskEXTFMT
	(id_bskEXTREC,
	format,
	last_updated,
	value)
	VALUES (%s, %s, %s, %s)"""
	now = convert_datestruct_to_datetext(localtime())
	value = create_pseudo_record(es_title, es_desc, es_url, of)
	params = (es_id, of, now, compress(value))
	run_sql(query,params)

	def get_external_colid_and_url(recid):
	"""Get the collection id and original url for an external record."""

	if recid:
	query = """SELECT
	collection_id,
	original_url
	FROM bskEXTREC
	WHERE id=%s"""
	params = (-recid,)
	res = run_sql(query,params)
	if res:
	return res
	else:
	return 0

	############################ Group baskets ####################################

	def get_group_baskets_info_for_group(grpid):
	"""Return information about every basket that belongs to the given group,
	provided the user is its manager or a member of it."""

	if not grpid:
	return ()

	query = """ SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	COUNT(rec.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(rec.date_added), '%%Y-%%m-%%d %%H:%%i:%%s'),
	ugbsk.share_level,
	bsk.id_owner
	FROM usergroup_bskBASKET AS ugbsk
	JOIN bskBASKET AS bsk
	ON bsk.id=ugbsk.id_bskBASKET
	LEFT JOIN bskREC AS rec
	ON rec.id_bskBASKET=bsk.id
	WHERE ugbsk.id_usergroup=%s
	AND ugbsk.share_level!='NO'
	GROUP BY bsk.id
	ORDER BY bsk.name"""

	params = (grpid,)

	res = run_sql(query, params)

	return res

	def get_group_name(gid):
	"""Given its id return the group's name."""

	query = """ SELECT name
	FROM usergroup
	WHERE id=%s"""
	params = (gid,)
	res = run_sql(query, params)

	return res

	def get_all_user_group_basket_ids_by_group(uid):
	"""For a given user return all their group basket ids grouped by group."""

	query = """ SELECT ug.id,
	ug.name,
	GROUP_CONCAT(ugbsk.id_bskBASKET)
	FROM usergroup AS ug
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_usergroup=ug.id
	JOIN bskBASKET AS bsk
	ON ugbsk.id_bskBASKET=bsk.id
	JOIN user_usergroup AS uug
	ON ug.id=uug.id_usergroup
	AND uug.id_user=%s
	GROUP BY ug.name
	ORDER BY ug.name"""
	params = (uid,)
	res = run_sql(query, params)

	return res

	def get_all_user_group_basket_ids_by_group_with_add_rights(uid):
	"""For a given user return all their group basket ids grouped by group.
	Return only the basket ids to which it is allowed to add records."""

	query = """ SELECT ug.name,
	GROUP_CONCAT(ugbsk.id_bskBASKET)
	FROM usergroup AS ug
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_usergroup=ug.id
	AND ugbsk.share_level!='NO'
	AND ugbsk.share_level!='RI'
	AND ugbsk.share_level!='RC'
	AND ugbsk.share_level!='AC'
	JOIN bskBASKET AS bsk
	ON ugbsk.id_bskBASKET=bsk.id
	JOIN user_usergroup AS uug
	ON ug.id=uug.id_usergroup
	AND uug.id_user=%s
	GROUP BY ug.name
	ORDER BY ug.name"""
	params = (uid,)
	res = run_sql(query, params)

	return res

	def get_all_group_baskets_names(uid,
	min_rights=CFG_WEBBASKET_SHARE_LEVELS['ADDCMT']):
	"""For a given user returns every group baskets in which he can <min_rights>
	return a list of tuples: (bskid, bsk_name, group_name)."""

	# TODO: This function is no longer used. Delete if necessary.
	uid = int(uid)
	try:
	min_rights_num = CFG_WEBBASKET_SHARE_LEVELS_ORDERED.index(min_rights)
	except ValueError:
	return ()
	groups = get_groups_user_member_of(uid)
	if groups:
	where_clause = '('
	where_clause += " OR ".join(["ugbsk.id_usergroup=%s"] * len(groups))
	where_clause += ') AND ('
	where_clause += " OR ".join(["ugbsk.share_level=%s"] * len(CFG_WEBBASKET_SHARE_LEVELS_ORDERED[min_rights_num:]))
	where_clause += ")"
	query = """
	SELECT bsk.id,
	bsk.name,
	ug.name
	FROM usergroup ug JOIN usergroup_bskBASKET ugbsk
	ON ug.id=ugbsk.id_usergroup
	JOIN bskBASKET bsk
	ON bsk.id=ugbsk.id_bskBASKET
	WHERE %s AND NOT(ugbsk.share_level='NO')
	ORDER BY ug.name""" % where_clause
	params = tuple([group_id for (group_id, dummy) in groups])
	params += tuple(CFG_WEBBASKET_SHARE_LEVELS_ORDERED[min_rights_num:])
	return run_sql(query, params)
	return ()

	def is_shared_to(bskids):
	"""For each bskid in bskids get id of one of its group. Used to
	make distinction between private basket (no group), 'world' basket
	(0) or group basket (any int > 0)
	"""
	if not((type(bskids) == list) or (type(bskids) == tuple)):
	bskids = [bskids]
	query = """SELECT b.id,
	min(u.id_usergroup)
	FROM
	bskBASKET b LEFT JOIN usergroup_bskBASKET u
	ON (b.id=u.id_bskBASKET) """
	if len(bskids) != 0:
	query += " WHERE "
	query += " OR ".join(['b.id=%s'] * len(bskids))
	query += " GROUP BY b.id"
	params = tuple(bskids)
	res = run_sql(query, params)
	if res:
	return res
	return ()

	def get_basket_share_level(bskid):
	"""Get the minimum share level of the basket (bskid).
	Returns:
	None for personal baskets
	positive integet for group baskets
	0 for public baskets
	Will return 0 if the basket is both group and publicly shared."""

	query = """ SELECT MIN(ugbsk.id_usergroup)
	FROM bskBASKET AS bsk
	LEFT JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=bsk.id
	WHERE bsk.id=%s
	GROUP BY bsk.id"""

	params = (bskid,)

	res = run_sql(query, params)

	return res

	def get_all_items_in_user_group_baskets(uid,
	group=0,
	format='hb'):
	"""For the specified user, return all the items in their group baskets,
	grouped by basket if local or as a list if external.
	If group is set, return only that group's items."""

	if group:
	group_clause = """AND ugbsk.id_usergroup=%s"""
	params_local = (group, uid)
	params_external = (group, uid, format)
	else:
	group_clause = ""
	params_local = (uid,)
	params_external = (uid, format)

	query_local = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	uug.id_usergroup,
	ug.name,
	ugbsk.share_level,
	GROUP_CONCAT(rec.id_bibrec_or_bskEXTREC)
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	%s
	JOIN user_usergroup AS uug
	ON uug.id_usergroup=ugbsk.id_usergroup
	AND uug.id_user=%%s
	JOIN usergroup AS ug
	ON ug.id=uug.id_usergroup
	WHERE rec.id_bibrec_or_bskEXTREC > 0
	GROUP BY rec.id_bskBASKET""" % (group_clause,)

	res_local = run_sql(query_local, params_local)

	query_external = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	uug.id_usergroup,
	ug.name,
	ugbsk.share_level,
	rec.id_bibrec_or_bskEXTREC,
	ext.value
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	%s
	JOIN user_usergroup AS uug
	ON uug.id_usergroup=ugbsk.id_usergroup
	AND uug.id_user=%%s
	JOIN usergroup AS ug
	ON ug.id=uug.id_usergroup
	JOIN bskEXTFMT AS ext
	ON ext.id_bskEXTREC=-rec.id_bibrec_or_bskEXTREC
	AND ext.format=%%s
	WHERE rec.id_bibrec_or_bskEXTREC < 0
	ORDER BY rec.id_bskBASKET""" % (group_clause,)

	res_external = run_sql(query_external, params_external)

	return (res_local, res_external)

	def get_all_items_in_user_group_baskets_by_matching_notes(uid,
	group=0,
	p=""):
	"""For the specified user, return all the items in group personal baskets
	matching their notes' titles and bodies, grouped by basket.
	If topic is set, return only that topic's items."""

	p = p and '%' + p + '%' or '%'

	if group:
	group_clause = """AND ugbsk.id_usergroup=%s"""
	params = (group, uid, p, p)
	else:
	group_clause = ""
	params = (uid, p, p)

	query = """ SELECT notes.id_bskBASKET,
	bsk.name,
	uug.id_usergroup,
	ug.name,
	ugbsk.share_level,
	GROUP_CONCAT(DISTINCT(notes.id_bibrec_or_bskEXTREC))
	FROM bskRECORDCOMMENT AS notes
	JOIN bskBASKET AS bsk
	ON bsk.id=notes.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=notes.id_bskBASKET
	AND ugbsk.share_level IS NOT NULL
	AND ugbsk.share_level!='NO'
	AND ugbsk.share_level!='RI'
	%s
	JOIN user_usergroup AS uug
	ON uug.id_usergroup=ugbsk.id_usergroup
	AND uug.id_user=%%s
	JOIN usergroup AS ug
	ON ug.id=uug.id_usergroup
	WHERE notes.title like %%s
	OR notes.body like %%s
	GROUP BY notes.id_bskBASKET""" % (group_clause,)

	res = run_sql(query, params)

	return res

	def is_group_basket_valid(uid, bskid):
	"""Check if the basked (bskid) belongs to one of the groups the user (uid)
	is a member of and is valid."""

	query = """ SELECT id
	FROM bskBASKET AS bsk
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=bsk.id
	JOIN user_usergroup AS uug
	ON uug.id_usergroup=ugbsk.id_usergroup
	AND uug.id_user=%s
	WHERE id=%s"""
	params = (uid, bskid)
	res = run_sql(query, params)

	return res

	def is_group_valid(uid, group):
	"""Check if the group exists and the user is a member or manager."""

	query = """ SELECT id_usergroup
	FROM user_usergroup
	WHERE id_usergroup=%s
	AND id_user=%s"""
	params = (group, uid)
	res = run_sql(query, params)

	return res

	def get_all_user_groups(uid):
	"""Return a list of the groups the user is a member of or manages."""

	query = """ SELECT ug.id,
	ug.name
	FROM user_usergroup AS uug
	JOIN usergroup AS ug
	ON ug.id=uug.id_usergroup
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_usergroup=uug.id_usergroup
	WHERE uug.id_user=%s
	GROUP BY uug.id_usergroup"""
	params = (uid,)
	res = run_sql(query, params)
	return res

	########################## External baskets ###################################

	def get_external_baskets_infos(uid):
	"""Get general informations about every external basket user uid has subscribed to."""
	query = """
	SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	count(rec.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(rec.date_added), '%%Y-%%m-%%d %%H:%%i:%%s'),
	ugbsk.share_level
	FROM bskBASKET bsk JOIN user_bskBASKET ubsk
	ON (bsk.id=ubsk.id_bskBASKET AND ubsk.id_user=%s)
	LEFT JOIN bskREC rec
	ON (bsk.id=rec.id_bskBASKET)
	LEFT JOIN usergroup_bskBASKET ugbsk
	ON (ugbsk.id_bskBASKET=bsk.id AND ugbsk.id_usergroup=0)

	WHERE bsk.id_owner!=%s

	GROUP BY bsk.id
	"""
	uid = int(uid)
	params = (uid, uid)
	res = run_sql(query, params)
	if res:
	return res
	return ()

	def get_external_basket_info(bskid):
	""""""

	query = """ SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	count(rec.id_bibrec_or_bskEXTREC),
	DATE_FORMAT(max(rec.date_added), '%%Y-%%m-%%d %%H:%%i:%%s'),
	ugbsk.share_level
	FROM bskBASKET AS bsk
	LEFT JOIN bskREC AS rec
	ON bsk.id=rec.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON bsk.id=ugbsk.id_bskBASKET
	AND ugbsk.id_usergroup=0
	WHERE id=%s"""
	params = (bskid,)
	res = run_sql(query, params)

	return res

	def get_all_external_basket_ids_and_names(uid):
	"""For a given user return all their external baskets
	(in tuples: (id, name, number_of_records))."""

	query = """ SELECT bsk.id,
	bsk.name,
	count(rec.id_bibrec_or_bskEXTREC),
	ugbsk.id_usergroup
	FROM user_bskBASKET AS ubsk
	JOIN bskBASKET AS bsk
	ON ubsk.id_bskBASKET=bsk.id
	AND ubsk.id_user!=bsk.id_owner
	LEFT JOIN bskREC AS rec
	ON ubsk.id_bskBASKET=rec.id_bskBASKET
	LEFT JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_usergroup=0
	AND ugbsk.id_bskBASKET=bsk.id
	WHERE ubsk.id_user=%s
	GROUP BY bsk.id
	ORDER BY bsk.name"""
	params = (uid,)
	res = run_sql(query, params)

	return res

	def count_external_baskets(uid):
	"""Returns the number of external baskets the user is subscribed to."""

	query = """ SELECT COUNT(ubsk.id_bskBASKET)
	FROM user_bskBASKET ubsk
	LEFT JOIN bskBASKET bsk
	ON (bsk.id=ubsk.id_bskBASKET AND ubsk.id_user=%s)
	WHERE bsk.id_owner!=%s"""

	params = (int(uid), int(uid))

	res = run_sql(query, params)

	return __wash_sql_count(res)

	def get_all_external_baskets_names(uid,
	min_rights=CFG_WEBBASKET_SHARE_LEVELS['ADDCMT']):

	""" for a given user returns every basket which he has subscribed to and in which
	he can <min_rights>
	return a list of tuples: (bskid, bsk_name)
	"""
	uid = int(uid)
	try:
	min_rights_num = CFG_WEBBASKET_SHARE_LEVELS_ORDERED.index(min_rights)
	except ValueError:
	return ()
	where_clause = ' AND ('
	for right in CFG_WEBBASKET_SHARE_LEVELS_ORDERED[min_rights_num:-1]:
	where_clause += "ugbsk.share_level = '%s' OR " % right
	where_clause += "ugbsk.share_level = '%s')" % CFG_WEBBASKET_SHARE_LEVELS_ORDERED[-1]
	query = """
	SELECT bsk.id,
	bsk.name
	FROM bskBASKET bsk JOIN usergroup_bskBASKET ugbsk
	ON bsk.id=ugbsk.id_bskBASKET
	JOIN user_bskBASKET ubsk
	ON ubsk.id_bskBASKET=bsk.id
	WHERE ugbsk.id_usergroup=0 AND
	ubsk.id_user=%s AND
	NOT(bsk.id_owner=%s) AND
	NOT(ugbsk.share_level='NO')
	""" + where_clause

	params = (uid, uid)
	return run_sql(query, params)

	def get_all_items_in_user_public_baskets(uid,
	format='hb'):
	"""For the specified user, return all the items in the public baskets they
	are subscribed to, grouped by basket if local or as a list if external."""

	query_local = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	GROUP_CONCAT(rec.id_bibrec_or_bskEXTREC)
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	AND bsk.id_owner!=%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=rec.id_bskBASKET
	AND ubsk.id_user=%s
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	AND ugbsk.id_usergroup=0
	WHERE rec.id_bibrec_or_bskEXTREC > 0
	GROUP BY rec.id_bskBASKET"""

	params_local = (uid, uid)

	res_local = run_sql(query_local, params_local)

	query_external = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	rec.id_bibrec_or_bskEXTREC,
	ext.value
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	AND bsk.id_owner!=%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=rec.id_bskBASKET
	AND ubsk.id_user=%s
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	AND ugbsk.id_usergroup=0
	JOIN bskEXTFMT AS ext
	ON ext.id_bskEXTREC=-rec.id_bibrec_or_bskEXTREC
	AND ext.format=%s
	WHERE rec.id_bibrec_or_bskEXTREC < 0
	ORDER BY rec.id_bskBASKET"""

	params_external = (uid, uid, format)

	res_external = run_sql(query_external, params_external)

	return (res_local, res_external)

	def get_all_items_in_user_public_baskets_by_matching_notes(uid,
	p=""):
	"""For the specified user, return all the items in the public baskets they
	are subscribed to, matching their notes' titles and bodies,
	grouped by basket"""

	p = p and '%' + p + '%' or '%'

	query = """ SELECT notes.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	GROUP_CONCAT(DISTINCT(notes.id_bibrec_or_bskEXTREC))
	FROM bskRECORDCOMMENT AS notes
	JOIN bskBASKET AS bsk
	ON bsk.id=notes.id_bskBASKET
	AND bsk.id_owner!=%s
	JOIN user_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=notes.id_bskBASKET
	AND ubsk.id_user=%s
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=notes.id_bskBASKET
	AND ugbsk.id_usergroup=0
	AND ugbsk.share_level IS NOT NULL
	AND ugbsk.share_level!='NO'
	AND ugbsk.share_level!='RI'
	WHERE notes.title like %s
	OR notes.body like %s
	GROUP BY notes.id_bskBASKET"""

	params = (uid, uid, p, p)

	res = run_sql(query, params)

	return res

	def get_all_items_in_all_public_baskets(format='hb'):
	"""Return all the items in all the public baskets,
	grouped by basket if local or as a list if external."""

	query_local = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	GROUP_CONCAT(rec.id_bibrec_or_bskEXTREC)
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	AND ugbsk.id_usergroup=0
	WHERE rec.id_bibrec_or_bskEXTREC > 0
	GROUP BY rec.id_bskBASKET"""

	res_local = run_sql(query_local)

	query_external = """
	SELECT rec.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	rec.id_bibrec_or_bskEXTREC,
	ext.value
	FROM bskREC AS rec
	JOIN bskBASKET AS bsk
	ON bsk.id=rec.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=rec.id_bskBASKET
	AND ugbsk.id_usergroup=0
	JOIN bskEXTFMT AS ext
	ON ext.id_bskEXTREC=-rec.id_bibrec_or_bskEXTREC
	AND ext.format=%s
	WHERE rec.id_bibrec_or_bskEXTREC < 0
	ORDER BY rec.id_bskBASKET"""

	params_external = (format,)

	res_external = run_sql(query_external, params_external)

	return (res_local, res_external)

	def get_all_items_in_all_public_baskets_by_matching_notes(p=""):
	"""Return all the items in all the public baskets matching
	their notes' titles and bodies, grouped by basket"""

	p = p and '%' + p + '%' or '%'

	query = """ SELECT notes.id_bskBASKET,
	bsk.name,
	ugbsk.share_level,
	GROUP_CONCAT(DISTINCT(notes.id_bibrec_or_bskEXTREC))
	FROM bskRECORDCOMMENT AS notes
	JOIN bskBASKET AS bsk
	ON bsk.id=notes.id_bskBASKET
	JOIN usergroup_bskBASKET AS ugbsk
	ON ugbsk.id_bskBASKET=notes.id_bskBASKET
	AND ugbsk.id_usergroup=0
	AND ugbsk.share_level IS NOT NULL
	AND ugbsk.share_level!='NO'
	AND ugbsk.share_level!='RI'
	WHERE notes.title like %s
	OR notes.body like %s
	GROUP BY notes.id_bskBASKET"""

	params = (p, p)

	res = run_sql(query, params)

	return res

	############################ Public access ####################################

	def get_public_basket_infos(bskid):
	"""return (id, name, date modification, nb of views, id of owner, nickname of owner, rights for public access)
	for a given basket"""
	basket = []
	query1 = """SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	bsk.id_owner,
	user.nickname
	FROM bskBASKET bsk LEFT JOIN user
	ON bsk.id_owner=user.id
	WHERE bsk.id=%s"""
	res1 = run_sql(query1, (int(bskid),))
	if len(res1):
	basket = list(res1[0])
	query2 = """SELECT share_level
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0 and id_bskBASKET=%s"""
	res2 = run_sql(query2, (int(bskid),))
	if res2:
	basket.append(res2[0][0])
	else:
	basket.append(None)
	return basket

	def get_public_basket_info(bskid):
	"""Return information about a given public basket."""

	query = """ SELECT bsk.id,
	bsk.name,
	bsk.id_owner,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	COUNT(rec.id_bibrec_or_bskEXTREC),
	GROUP_CONCAT(rec.id_bibrec_or_bskEXTREC),
	ubsk.share_level
	FROM bskBASKET AS bsk
	LEFT JOIN bskREC AS rec
	ON rec.id_bskBASKET=bsk.id
	JOIN usergroup_bskBASKET AS ubsk
	ON ubsk.id_bskBASKET=bsk.id
	AND ubsk.id_usergroup=0
	WHERE bsk.id=%s
	GROUP BY bsk.id;"""

	params = (bskid,)

	res = run_sql(query, params)

	return res

	def get_basket_general_infos(bskid):
	"""return information about a basket, suited for public access.
	@return: a (id, name, date of modification, nb of views, nb of records, id of owner) tuple
	"""
	query = """SELECT bsk.id,
	bsk.name,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bsk.nb_views,
	count(rec.id_bibrec_or_bskEXTREC),
	bsk.id_owner

	FROM bskBASKET bsk LEFT JOIN bskREC rec
	ON bsk.id=rec.id_bskBASKET
	WHERE bsk.id=%s

	GROUP BY bsk.id"""
	res = run_sql(query, (int(bskid),))
	if res:
	query2 = "UPDATE bskBASKET SET nb_views=nb_views+1 WHERE id=%s"
	run_sql(query2, (int(bskid),))
	return res[0]
	return ()

	def get_basket_owner_id(bskid):
	"""Return the uid of the owner."""
	query = """SELECT id_owner
	FROM bskBASKET
	WHERE id=%s"""
	res = run_sql(query, (bskid, ))
	if res:
	return res[0][0]
	return -1

	def count_public_baskets():
	"""Returns the number of public baskets."""

	query = """ SELECT COUNT(id_bskBASKET)
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0"""

	res = run_sql(query)

	return __wash_sql_count(res)

	def get_public_baskets_list(inf_limit, max_number, order=1, asc=1):
	"""Return list of public baskets
	@param inf_limit: limit to baskets from number x
	@param max_number: number of baskets to return
	@order: 1: order by name of basket, 2: number of views, 3: owner
	@return:
	[(basket id, basket name, nb of views, uid of owner, nickname of owner)]"""

	query = """SELECT bsk.id,
	bsk.name,
	bsk.nb_views,
	u.id,
	u.nickname
	FROM bskBASKET bsk LEFT JOIN usergroup_bskBASKET ugbsk
	on bsk.id=ugbsk.id_bskBASKET
	LEFT JOIN user u
	on bsk.id_owner=u.id
	WHERE ugbsk.id_usergroup=0
	"""
	if order == 2:
	query += 'ORDER BY bsk.nb_views'
	elif order == 3:
	query += 'ORDER BY u.nickname'
	if asc:
	query += ' ASC'
	else:
	query += ' DESC'
	query += ', u.id'
	else:
	query += 'ORDER BY bsk.name'
	if asc:
	query += ' ASC '
	else:
	query += ' DESC '
	query += "LIMIT %s,%s"

	return run_sql(query, (inf_limit, max_number))

	def count_all_public_baskets():
	"""Return the number of all the public baskets."""

	query = """ SELECT count(id_bskBASKET)
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0"""

	res = run_sql(query)

	return __wash_sql_count(res)

	def get_list_public_baskets(page, max_number, sort='name', asc=1):
	"""Return list of public baskets
	@param page: limit to baskets from number x
	@param max_number: maximum number of baskets to return
	@sort: 1: order by name of basket, 2: number of views, 3: owner
	@return:
	[(basket id, basket name, nb of views, uid of owner, nickname of owner)]"""

	query = """ SELECT bsk.id,
	bsk.name,
	bsk.id_owner,
	u.nickname,
	DATE_FORMAT(bsk.date_modification, '%%Y-%%m-%%d %%H:%%i:%%s'),
	COUNT(rec.id_bibrec_or_bskEXTREC) AS items,
	bsk.nb_views
	FROM usergroup_bskBASKET AS ugbsk
	JOIN bskBASKET AS bsk
	ON bsk.id=ugbsk.id_bskBASKET
	LEFT JOIN bskREC AS rec
	ON rec.id_bskBASKET=bsk.id
	LEFT JOIN user AS u
	ON u.id=bsk.id_owner
	WHERE ugbsk.id_usergroup=0
	GROUP BY bsk.id"""

	if sort == 'name':
	query += """
	ORDER BY bsk.name"""
	elif sort == 'owner':
	query += """
	ORDER BY u.nickname"""
	elif sort == 'views':
	query += """
	ORDER BY bsk.nb_views"""
	elif sort == 'date':
	query += """
	ORDER BY bsk.date_modification"""
	elif sort == 'items':
	query += """
	ORDER BY items"""
	else:
	query += """
	ORDER BY bsk.name"""
	if asc:
	query += """ ASC"""
	if sort == """owner""":
	query += """, u.id"""
	else:
	query += """ DESC"""
	if sort == """owner""":
	query += """, u.id"""

	query += """
	LIMIT %s, %s"""

	page = max(0, page)

	res = run_sql(query, (page, max_number))

	return res

	def is_basket_public(bskid):
	"""Check if the given basket is public.
	Returns ((0,),) if False, ((1,),) if True."""

	query = """ SELECT COUNT(*)
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0
	AND id_bskBASKET=%s"""

	params = (bskid,)

	res = run_sql(query, params)

	return __wash_sql_count(res)

	def subscribe(uid, bskid):
	"""Subscribe the given user to the given basket."""

	query1 = """SELECT COUNT(*)
	FROM user_bskBASKET
	WHERE id_user=%s
	AND id_bskBASKET=%s"""

	params1 = (uid, bskid)

	res1 = run_sql(query1, params1)

	if res1[0][0]:
	# The user is either the owner of the basket or is already subscribed.
	return False
	else:
	query2 = """INSERT INTO user_bskBASKET (id_user, id_bskBASKET)
	VALUES (%s, %s)"""

	params2 = (uid, bskid)

	run_sql(query2, params2)

	return True

	def unsubscribe(uid, bskid):
	"""Unsubscribe the given user from the given basket."""

	query1 = """SELECT COUNT(*)
	FROM bskBASKET
	WHERE id_owner=%s
	AND id=%s"""

	params1 = (uid, bskid)

	res1 = run_sql(query1, params1)

	if res1[0][0]:
	# The user is the owner of the basket.
	return False
	else:
	query2 = """DELETE FROM user_bskBASKET
	WHERE id_user=%s
	AND id_bskBASKET=%s"""

	params2 = (uid, bskid)

	res2 = run_sql(query2, params2)

	if res2:
	return True
	else:
	return False

	def is_user_subscribed_to_basket(uid, bskid):
	"""Return ((1,),) if the user is subscribed to the given basket
	or ((0,),) if the user is not subscribed or is the owner of the basket."""

	query = """ SELECT COUNT(ubsk.id_bskBASKET)
	FROM user_bskBASKET AS ubsk
	JOIN bskBASKET AS bsk
	ON bsk.id=ubsk.id_bskBASKET
	AND bsk.id_owner!=ubsk.id_user
	WHERE ubsk.id_user=%s
	AND ubsk.id_bskBASKET=%s"""

	params = (uid, bskid)

	res = run_sql(query, params)

	return __wash_sql_count(res)

	def count_subscribers(uid, bskid):
	"""Returns a (number of users, number of groups, number of alerts) tuple
	for the given user (uid) and basket (bskid)."""

	uid = int(uid)
	bskid = int(bskid)

	query_groups = """ SELECT count(id_usergroup)
	FROM usergroup_bskBASKET
	WHERE id_bskBASKET=%s
	AND NOT(share_level='NO')
	GROUP BY id_bskBASKET"""
	params_groups = (bskid,)
	res_groups = run_sql(query_groups, params_groups)
	nb_groups = __wash_sql_count(res_groups)

	query_users = """ SELECT count(id_user)
	FROM user_bskBASKET
	WHERE id_bskBASKET=%s
	AND id_user!=%s
	GROUP BY id_bskBASKET"""
	params_users = (bskid, uid)
	res_users = run_sql(query_users, params_users)
	nb_users = __wash_sql_count(res_users)

	query_alerts = """ SELECT count(id_query)
	FROM user_query_basket
	WHERE id_basket=%s
	GROUP BY id_basket"""
	params_alerts = (bskid,)
	res_alerts = run_sql(query_alerts, params_alerts)
	nb_alerts = __wash_sql_count(res_alerts)
	return (nb_users, nb_groups, nb_alerts)

	def get_groups_subscribing_to_basket(bskid):
	""" get list of (group id, group name, rights) tuples for a given basket
	Please note that group 0 is used to mean everybody.
	"""
	query = """SELECT ugb.id_usergroup,
	ug.name,
	ugb.share_level
	FROM usergroup_bskBASKET ugb LEFT JOIN usergroup ug
	ON ugb.id_usergroup=ug.id
	WHERE ugb.id_bskBASKET=%s
	ORDER BY ugb.id_usergroup"""
	return run_sql(query, (int(bskid),))

	def get_rights_on_public_basket(bskid):
	""""""

	query = """ SELECT share_level
	FROM usergroup_bskBASKET
	WHERE id_usergroup=0
	AND id_bskBASKET=%s"""

	params = (bskid,)

	res = run_sql(query, params)

	return res

	def count_public_basket_subscribers(bskid):
	"""Return the number of users subscribed to the given public basket."""

	query = """ SELECT COUNT(ubsk.id_user)
	FROM user_bskBASKET AS ubsk
	JOIN bskBASKET AS bsk
	ON bsk.id=ubsk.id_bskBASKET
	AND bsk.id_owner!=ubsk.id_user
	WHERE ubsk.id_bskBASKET=%s"""

	params = (bskid,)

	res = run_sql(query, params)

	return __wash_sql_count(res)

	################################ Notes ########################################

	def get_notes(bskid, recid):
	"""Return all comments for record recid in basket bskid."""

	query = """
	SELECT user.id,
	user.nickname,
	bskcmt.title,
	bskcmt.body,
	DATE_FORMAT(bskcmt.date_creation, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bskcmt.priority,
	bskcmt.id,
	bskcmt.in_reply_to_id_bskRECORDCOMMENT

	FROM bskRECORDCOMMENT bskcmt LEFT JOIN user
	ON (bskcmt.id_user=user.id)

	WHERE bskcmt.id_bskBASKET=%s AND
	bskcmt.id_bibrec_or_bskEXTREC=%s

	ORDER BY bskcmt.reply_order_cached_data
	"""
	bskid = int(bskid)
	recid = int(recid)
	res = run_sql(query, (bskid, recid))
	if res:
	return res
	else:
	return ()

	def get_note(cmtid):
	"""Return comment cmtid as a (author's nickname, author's uid, title, body, date of creation, priority) tuple"""
	out = ()
	query = """
	SELECT user.nickname,
	user.id,
	bskcmt.title,
	bskcmt.body,
	DATE_FORMAT(bskcmt.date_creation, '%%Y-%%m-%%d %%H:%%i:%%s'),
	bskcmt.priority

	FROM bskRECORDCOMMENT bskcmt LEFT JOIN user
	ON (bskcmt.id_user=user.id)

	WHERE bskcmt.id=%s
	"""
	cmtid = int(cmtid)
	res = run_sql(query, (cmtid,))
	if res:
	return res[0]
	return out

	def save_note(uid, bskid, recid, title, body, date_creation=None, reply_to=None):
	"""Save then given note (title, body) on the given item in the given basket.
	@param date_creation: date in which the note was created
	@type date_creation: None or String, e.g: '2011-07-04 14:20:57'

	Note: convert_datestruct_to_datetext((2005, 11, 16, 15, 11, 44, 2, 320, 0)) -> '2005-11-16 15:11:44'
	"""
	if reply_to and CFG_WEBBASKET_MAX_COMMENT_THREAD_DEPTH >= 0:
	# Check that we have not reached max depth
	note_ancestors = get_note_ancestors(reply_to)
	if len(note_ancestors) >= CFG_WEBBASKET_MAX_COMMENT_THREAD_DEPTH:
	if CFG_WEBBASKET_MAX_COMMENT_THREAD_DEPTH == 0:
	reply_to = None
	else:
	reply_to = note_ancestors[CFG_WEBBASKET_MAX_COMMENT_THREAD_DEPTH - 1]

	if not date_creation:
	date = convert_datestruct_to_datetext(localtime())
	else: #the date comes with the proper format
	date = date_creation

	res = run_sql("""INSERT INTO bskRECORDCOMMENT (id_user, id_bskBASKET,
	id_bibrec_or_bskEXTREC, title, body, date_creation, in_reply_to_id_bskRECORDCOMMENT)
	VALUES (%s, %s, %s, %s, %s, %s, %s)""",
	(int(uid), int(bskid), int(recid), title, body, date, reply_to or 0))
	if res:
	new_comid = int(res)
	parent_reply_order = run_sql("""SELECT reply_order_cached_data from bskRECORDCOMMENT where id=%s""", (reply_to,))
	if not parent_reply_order or parent_reply_order[0][0] is None:
	parent_reply_order = ''
	else:
	parent_reply_order = parent_reply_order[0][0]
	run_sql("""UPDATE bskRECORDCOMMENT SET reply_order_cached_data=%s WHERE id=%s""",
	(parent_reply_order + get_reply_order_cache_data(new_comid), new_comid))
	return int(res)
	return 0

	def delete_note(bskid, recid, cmtid):
	"""Delete a comment on an item of a basket"""

	query = """ DELETE
	FROM bskRECORDCOMMENT
	WHERE id_bskBASKET=%s
	AND id_bibrec_or_bskEXTREC=%s
	AND id=%s"""

	params = (int(bskid), int(recid), int(cmtid))

	run_sql(query, params)

	def get_note_ancestors(cmtid, depth=None):
	"""
	Returns the list of ancestors of the given note, ordered from
	oldest to newest ("top-down": direct parent of cmtid is at last position),
	up to given depth

	@param cmtid: the ID of the note for which we want to retrieve ancestors
	@type cmtid: int
	@param depth: the maximum of levels up from the given note we
	want to retrieve ancestors. None for no limit, 1 for
	direct parent only, etc.
	@type depth: int
	@return the list of ancestors
	@rtype: list
	"""
	if depth == 0:
	return []

	res = run_sql("SELECT in_reply_to_id_bskRECORDCOMMENT FROM bskRECORDCOMMENT WHERE id=%s", (cmtid,))
	if res:
	parent_cmtid = res[0][0]
	if parent_cmtid == 0:
	return []
	parent_ancestors = []
	if depth:
	depth -= 1
	parent_ancestors = get_note_ancestors(parent_cmtid, depth)
	parent_ancestors.append(parent_cmtid)
	return parent_ancestors
	else:
	return []

	def note_belongs_to_item_in_basket_p(cmtid, recid, bskid):
	"""Returns 1 (True) if the given note (cmtid) belongs to the given item
	(recid) and the given basket (bskid) or 0 (False)."""

	query = """ SELECT COUNT(*)
	FROM bskRECORDCOMMENT
	WHERE id=%s
	AND id_bibrec_or_bskEXTREC=%s
	AND id_bskBASKET=%s"""

	params = (cmtid, recid, bskid)

	res = run_sql(query, params)

	return __wash_sql_count(res)

	def get_number_of_notes_per_record_in_basket(bskid, recids):
	"""Returns the number of comments per record
	for all the given records in the given basket"""

	# We need to convert the list of recids into a string of commma separated
	# numbers (recids), instead of a tuple, to cover the case where we have
	# single element lists of recids. Example:
	# [1] --> '1' instaed of [1] --> (1,)
	# Single element tuples would cause the query to fail due to the syntax.
	query = """ SELECT rec.id_bibrec_or_bskEXTREC,
	COUNT(cmt.id_bibrec_or_bskEXTREC)
	FROM bskREC as rec
	LEFT JOIN bskRECORDCOMMENT as cmt
	ON cmt.id_bibrec_or_bskEXTREC = rec.id_bibrec_or_bskEXTREC
	WHERE rec.id_bskBASKET=%%s
	AND rec.id_bibrec_or_bskEXTREC IN (%s)
	GROUP BY id_bibrec_or_bskEXTREC
	ORDER BY rec.score""" % (str(map(int, recids))[1:-1],)

	params = (bskid,)

	result = run_sql(query, params)

	return result

	########################## Usergroup functions ################################

	def get_group_infos(uid):
	"""For each group the user with uid is a member of return the id, name and number of baskets."""
	query = """SELECT g.id,
	g.name,
	count(ugb.id_bskBASKET)
	FROM usergroup g LEFT JOIN (user_usergroup ug,
	usergroup_bskBASKET ugb)
	ON (g.id=ug.id_usergroup
	AND
	g.id=ugb.id_usergroup)
	WHERE ug.id_user=%s AND NOT(ugb.share_level='NO') AND ug.user_status!=%s
	GROUP BY g.id
	ORDER BY g.name"""
	params = (int(uid), CFG_WEBSESSION_USERGROUP_STATUS['PENDING'])
	res = run_sql(query, params)
	return res

	def count_groups_user_member_of(uid):
	"""Returns the number of groups the user has joined."""

	query = """ SELECT COUNT(id_usergroup)
	FROM user_usergroup
	WHERE id_user=%s
	AND user_status!=%s"""

	params = (int(uid), CFG_WEBSESSION_USERGROUP_STATUS['PENDING'])

	res = run_sql(query, params)

	return __wash_sql_count(res)

	def get_groups_user_member_of(uid):
	"""
	Get uids and names of groups user is member of.
	@param uid: user id (int)
	@return: a tuple of (group_id, group_name) tuples
	"""
	query = """
	SELECT g.id,
	g.name
	FROM usergroup g JOIN user_usergroup ug
	ON (g.id=ug.id_usergroup)
	WHERE ug.id_user=%s and ug.user_status!=%s
	ORDER BY g.name
	"""
	params = (int(uid), CFG_WEBSESSION_USERGROUP_STATUS['PENDING'])
	res = run_sql(query, params)
	if res:
	return res
	return ()

	########################## auxilliary functions ###############################

	def __wash_sql_count(res):
	"""Wash the result of SQL COUNT function and return only an integer."""
	if res:
	return res[0][0]
	return 0

	def __decompress_last(item):
	"""private function, used to shorten code"""
	item = list(item)
	item[-1] = decompress(item[-1])
	return item

	def create_pseudo_record(es_title, es_desc, es_url, of="hb"):
	"""Return a pseudo record representation given a title and a description."""

	if of == 'hb':
	record = '\n'.join([es_title, es_desc, es_url])
	if of == 'xm':
	# In case we want to use the controlfield,
	# the -es_id must be used.
	#<controlfield tag="001">%s</controlfield>
	record = """<record>
	<datafield tag="245" ind1=" " ind2=" ">
	<subfield code="a">%s</subfield>
	</datafield>
	<datafield tag="520" ind1=" " ind2=" ">
	<subfield code="a">%s</subfield>
	</datafield>
	<datafield tag="856" ind1="4" ind2=" ">
	<subfield code="u">%s</subfield>
	</datafield>
	</record>""" % (encode_for_xml(es_title), encode_for_xml(es_desc), encode_for_xml(es_url))
	return record

	def prettify_url(url, char_limit=50, nb_dots=3):
	"""If the url has more characters than char_limit return a shortened version of it
	keeping the beginning and ending and replacing the rest with dots."""

	if len(url) > char_limit:
	# let's set a minimum character limit
	if char_limit < 5:
	char_limit = 5
	# let's set a maximum number of dots in relation to the character limit
	if nb_dots > char_limit/4:
	nb_dots = char_limit/5
	nb_char_url = char_limit - nb_dots
	nb_char_end = nb_char_url/4
	nb_char_beg = nb_char_url - nb_char_end
	return url[:nb_char_beg] + '.'*nb_dots + url[-nb_char_end:]
	else:
	return url

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