<?php
/*
 *  ConPortal - Pomona College ITS scheduling appplication
 *  Copyright (C) 2005-2006  Pomona College
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of version 2 of the GNU General Public License
 *  as published by the Free Software Foundation.
 *
 *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
 */

require_once('../standard.php');

if (isset($_POST['user']) && intval($_POST['user'])) {
    $user = $_POST['user'];
    $cur_groups = getGroupsForUser($user);

    if (!isset($_POST['selgroups']))
        $_POST['selgroups'] = array();

    // Figure out what we need to add/remove
    $remove = array_diff($cur_groups, $_POST['selgroups']);
    $add    = array_diff($_POST['selgroups'], $cur_groups);

    // Remove users no longer in the group and add users to the group
    foreach ($remove as $r)
        removeUserFromGroup($user, $r);
    foreach ($add as $a)
        addUserToGroup($user, $a);
} elseif (isset($_POST['group']) && intval($_POST['group'])) {
    $group = $_POST['group'];
    $cur_users = getUsersForSecurityGroup($group);
    $cur_perms = getPermissionsForGroup($group);

    if (!isset($_POST['selusers']))
        $_POST['selusers'] = array();

    // Figure out what we need to add/remove
    $remove = array_diff($cur_users, $_POST['selusers']);
    $add    = array_diff($_POST['selusers'], $cur_users);

    // Remove users no longer in the group and add users to the group
    foreach ($remove as $r)
        removeUserFromGroup($r, $group);
    foreach ($add as $a)
        addUserToGroup($a, $group);

    // --------------------

    if (!isset($_POST['selperms']))
        $_POST['selperms'] = array();

    $remove = array_diff($cur_perms, $_POST['selperms']);
    $add    = array_diff($_POST['selperms'], $cur_perms);

    // Remove/Add permissions to the group
    foreach ($remove as $r)
        revokePermissionFromGroup($r, $group);
    foreach ($add as $a)
        grantPermissionToGroup($a, $group);
} elseif (isset($_POST['perm']) && intval($_POST['perm'])) {
    $perm = $_POST['perm'];
    $cur_groups = getGroupsForPermission($perm);

    if (!isset($_POST['selgroups']))
        $_POST['selgroups'] = array();

    // Figure out what we need to add/remove
    $remove = array_diff($cur_groups, $_POST['selgroups']);
    $add    = array_diff($_POST['selgroups'], $cur_groups);

    // Remove/Add permissions to groups
    foreach ($remove as $r)
        revokePermissionFromGroup($perm, $r);
    foreach ($add as $a)
        grantPermissionToGroup($perm, $a);
}

header("Location: ".$_SERVER['HTTP_REFERER']);

?>