# -*- coding: UTF-8 -*-

# Copyright (C) 2015 Avencall
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

from xivo_dao.helpers import errors

from xivo_dao.alchemy.paging import Paging
from xivo_dao.helpers.db_manager import daosession


@daosession
def exists(session, paging_id):
    query = (session.query(Paging)
             .filter(Paging.id == paging_id)
             )

    return query.count() > 0


@daosession
def get_number(session, paging_id):
    number = (session.query(Paging.number)
              .filter(Paging.id == paging_id)
              .scalar()
              )

    if not number:
        raise errors.not_found('Paging', id=paging_id)

    return number
