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<?php
/*
* studip_seminar.php - Seminar API for Stud.IP webservice
*
* Copyright (C) 2006 - Marco Diedrich (mdiedric@uos.de)
*
* 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 2 of
* the License, or (at your option) any later version.
*/
require_once 'lib/webservices/api/studip_user.php';
require_once 'lib/webservices/api/studip_institute.php';
require_once 'lib/webservices/api/studip_session.php';
class StudipSeminarHelper
{
public static function get_title($seminar_id)
{
$seminar_id = preg_replace('/\W/', '', $seminar_id);
return Seminar::getInstance($seminar_id)->getName();
}
public static function validate_seminar_permission($ticket, $seminar_id, $permission)
{
$username = StudipSessionHelper::get_session_username($ticket);
if (in_array($username, StudipSeminarHelper::get_participants($seminar_id, $permission)) ||
in_array($username, StudipSeminarHelper::get_admins_for_seminar($seminar_id))) {
return $username;
} else {
return false;
}
}
public static function get_user_status($username, $seminar_id)
{
$db = DBManager::get();
$stmt = $db->prepare('SELECT status FROM seminar_user
JOIN auth_user_md5 USING(user_id)
WHERE Seminar_id = ? AND username = ?');
$stmt->execute([$seminar_id, $username]);
$status = $stmt->fetchColumn();
if (!$status) {
$admin_list = StudipSeminarHelper::get_admins_for_seminar($seminar_id);
if (in_array($username, $admin_list)) {
$status = 'admin';
}
}
return $status;
}
public static function get_participants($seminar_id, $status = 'all')
{
$db = DBManager::get();
if ($status == 'all') {
$query = 'SELECT username FROM auth_user_md5
JOIN seminar_user USING(user_id)
WHERE Seminar_id = ?';
$params = [$seminar_id];
} else {
$query = 'SELECT username FROM auth_user_md5
JOIN seminar_user USING(user_id)
WHERE Seminar_id = ? AND status = ?';
$params = [$seminar_id, $status];
}
$stmt = $db->prepare($query);
$stmt->execute($params);
return $stmt->fetchAll(PDO::FETCH_COLUMN);
}
public static function get_main_institute($seminar_id)
{
$db = DBManager::get();
$stmt = $db->prepare('SELECT Institut_id FROM seminare WHERE Seminar_id = ?');
$stmt->execute([$seminar_id]);
return $stmt->fetchColumn();
}
public static function get_additional_institutes($seminar_id)
{
$db = DBManager::get();
$stmt = $db->prepare('SELECT institut_id FROM seminar_inst WHERE seminar_id = ?');
$stmt->execute([$seminar_id]);
return $stmt->fetchAll(PDO::FETCH_COLUMN);
}
public static function get_all_institutes($seminar_id)
{
$institute_list = array_unique(array_merge([StudipSeminarHelper::get_main_institute($seminar_id)],
StudipSeminarHelper::get_additional_institutes($seminar_id)));
return $institute_list;
}
public static function get_admins_for_seminar($seminar_id)
{
$all_institutes = StudipSeminarHelper::get_all_institutes($seminar_id);
$admins = [];
foreach ($all_institutes as $institute) {
$admins = array_merge($admins, StudipInstituteHelper::get_admins_upward_recursive($institute));
}
$admins = array_merge($admins, Studip_User::find_by_status('root'));
return $admins;
}
public static function get_seminar_groups($seminar_id)
{
$db = DBManager::get();
$stmt = $db->prepare('SELECT st.name FROM statusgruppen st
JOIN seminare s ON (st.range_id = s.Seminar_id)
WHERE s.Seminar_id = ?');
$stmt->execute([$seminar_id]);
return $stmt->fetchAll(PDO::FETCH_COLUMN);
}
public static function get_seminar_group_members($seminar_id, $group_name)
{
$db = DBManager::get();
$result = [];
$stmt = $db->prepare('SELECT au.username FROM statusgruppen st
JOIN seminare s ON (st.range_id = s.Seminar_id)
JOIN statusgruppe_user su USING(statusgruppe_id)
JOIN auth_user_md5 au USING(user_id)
WHERE s.Seminar_id = ? AND st.name = ?');
$stmt->execute([$seminar_id, $group_name]);
foreach ($stmt as $row) {
$result[] = Studip_User::find_by_user_name($row['username']);
}
return $result;
}
}
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