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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* A namespace contains license specific functions
*
* @since 2.0
* @package core
* @subpackage lib
* @copyright 2010 Dongsheng Cai <dongsheng@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
class license_manager {
/**
* Adding a new license type
* @param object $license {
* shortname => string a shortname of license, will be refered by files table[required]
* fullname => string the fullname of the license [required]
* source => string the homepage of the license type[required]
* enabled => int is it enabled?
* version => int a version number used by moodle [required]
* }
*/
static public function add($license) {
global $DB;
if ($record = $DB->get_record('license', array('shortname'=>$license->shortname))) {
// record exists
if ($record->version < $license->version) {
// update license record
$license->enabled = $record->enabled;
$license->id = $record->id;
$DB->update_record('license', $license);
}
} else {
$DB->insert_record('license', $license);
}
return true;
}
/**
* Get license records
* @param mixed $param
* @return array
*/
static public function get_licenses($param = null) {
global $DB;
if (empty($param) || !is_array($param)) {
$param = array();
}
// get licenses by conditions
if ($records = $DB->get_records('license', $param)) {
return $records;
} else {
return array();
}
}
/**
* Get license record by shortname
* @param mixed $param the shortname of license, or an array
* @return object
*/
static public function get_license_by_shortname($name) {
global $DB;
if ($record = $DB->get_record('license', array('shortname'=>$name))) {
return $record;
} else {
return null;
}
}
/**
* Enable a license
* @param string $license the shortname of license
* @return boolean
*/
static public function enable($license) {
global $DB;
if ($license = self::get_license_by_shortname($license)) {
$license->enabled = 1;
$DB->update_record('license', $license);
}
self::set_active_licenses();
return true;
}
/**
* Disable a license
* @param string $license the shortname of license
* @return boolean
*/
static public function disable($license) {
global $DB, $CFG;
// Site default license cannot be disabled!
if ($license == $CFG->sitedefaultlicense) {
print_error('error');
}
if ($license = self::get_license_by_shortname($license)) {
$license->enabled = 0;
$DB->update_record('license', $license);
}
self::set_active_licenses();
return true;
}
/**
* Store active licenses in global $CFG
*/
static private function set_active_licenses() {
// set to global $CFG
$licenses = self::get_licenses(array('enabled'=>1));
$result = array();
foreach ($licenses as $l) {
$result[] = $l->shortname;
}
set_config('licenses', implode(',', $result));
}
/**
* Install moodle build-in licenses
*/
static public function install_licenses() {
$active_licenses = array();
$license = new stdClass();
$license->shortname = 'unknown';
$license->fullname = 'Unknown license';
$license->source = '';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'allrightsreserved';
$license->fullname = 'All rights reserved';
$license->source = 'http://en.wikipedia.org/wiki/All_rights_reserved';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'public';
$license->fullname = 'Public Domain';
$license->source = 'http://creativecommons.org/licenses/publicdomain/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc';
$license->fullname = 'Creative Commons';
$license->source = 'http://creativecommons.org/licenses/by/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc-nd';
$license->fullname = 'Creative Commons - NoDerivs';
$license->source = 'http://creativecommons.org/licenses/by-nd/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc-nc-nd';
$license->fullname = 'Creative Commons - No Commercial NoDerivs';
$license->source = 'http://creativecommons.org/licenses/by-nc-nd/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc-nc';
$license->fullname = 'Creative Commons - No Commercial';
$license->source = 'http://creativecommons.org/licenses/by-nd/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc-nc-sa';
$license->fullname = 'Creative Commons - No Commercial ShareAlike';
$license->source = 'http://creativecommons.org/licenses/by-nc-sa/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
$license->shortname = 'cc-sa';
$license->fullname = 'Creative Commons - ShareAlike';
$license->source = 'http://creativecommons.org/licenses/by-sa/3.0/';
$license->enabled = 1;
$license->version = '2010033100';
$active_licenses[] = $license->shortname;
self::add($license);
set_config('licenses', implode(',', $active_licenses));
}
}
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