<?php

// Pandora FMS - http://pandorafms.com
// ==================================================
// Copyright (c) 2005-2009 Artica Soluciones Tecnologicas
// Please see http://pandorafms.org for full contribution list
// This program is free software; you can redistribute it and/or
// modify it under the terms of the  GNU Lesser General Public License
// as published by the Free Software Foundation; version 2
// 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.
function pandora_session_open($save_path, $session_name)
{
    return true;
}


function pandora_session_close()
{
    return true;
}


function pandora_session_read($session_id)
{
    $session_id = addslashes($session_id);
    $session_data = db_get_value('data', 'tsessions_php', 'id_session', $session_id);

    if (!empty($session_data)) {
        return $session_data;
    } else {
        return '';
    }
}


function pandora_session_write($session_id, $data)
{
    $session_id = addslashes($session_id);

    $values = [];
    $values['last_active'] = time();

    if (!empty($data)) {
        $values['data'] = addslashes($data);
    }

    $session_exists = (bool) db_get_value('COUNT(id_session)', 'tsessions_php', 'id_session', $session_id);

    if (!$session_exists) {
        $values['id_session'] = $session_id;
        $retval_write = db_process_sql_insert('tsessions_php', $values);
    } else {
        $retval_write = db_process_sql_update('tsessions_php', $values, ['id_session' => $session_id]);
    }

    return $retval_write !== false;
}


function pandora_session_destroy($session_id)
{
    $session_id = addslashes($session_id);

    $retval = (bool) db_process_sql_delete('tsessions_php', ['id_session' => $session_id]);

    return $retval;
}


function pandora_session_gc($max_lifetime=300)
{
    global $config;

    if (isset($config['session_timeout'])) {
        $max_lifetime = $config['session_timeout'];
    }

    $time_limit = (time() - $max_lifetime);

    $retval = (bool) db_process_sql_delete('tsessions_php', ['last_active' => '<'.$time_limit]);

    return $retval;
}


// FIXME: SAML should work with pandora session handlers
if (db_get_value('value', 'tconfig', 'token', 'auth') != 'saml') {
    $result_handler = session_set_save_handler('pandora_session_open', 'pandora_session_close', 'pandora_session_read', 'pandora_session_write', 'pandora_session_destroy', 'pandora_session_gc');
}