settings.php

<?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/>.

/**
 * plagiarism.php - allows the admin to configure plagiarism stuff
 *
 * @package   plagiarism_turnitin
 * @author    Dan Marsden <dan@danmarsden.com>
 * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once(dirname(dirname(__FILE__)) . '/../config.php');
require_once($CFG->libdir.'/adminlib.php');
require_once($CFG->libdir.'/plagiarismlib.php');
require_once($CFG->dirroot.'/plagiarism/urkund/lib.php');
require_once($CFG->dirroot.'/plagiarism/urkund/urkund_form.php');

require_login();
admin_externalpage_setup('plagiarismurkund');

$context = get_context_instance(CONTEXT_SYSTEM);
require_capability('moodle/site:config', $context, $USER->id, true, "nopermissions");

$mform = new urkund_setup_form();
$plagiarismplugin = new plagiarism_plugin_urkund();

if ($mform->is_cancelled()) {
    redirect('');
}

echo $OUTPUT->header();
$currenttab='urkundsettings';
require_once('urkund_tabs.php');
if (($data = $mform->get_data()) && confirm_sesskey()) {
    if (!isset($data->urkund_use)) {
        $data->urkund_use = 0;
    }
    foreach ($data as $field => $value) {
        if (strpos($field, 'urkund')===0) {
            if ($field == 'urkund_api') { //strip trailing slash from api 
                $value = rtrim($value, '/');
            }
            if ($configfield = $DB->get_record('config_plugins', array('name'=>$field, 'plugin'=>'plagiarism'))) {
                $configfield->value = $value;
                if (! $DB->update_record('config_plugins', $configfield)) {
                    error("errorupdating");
                }
            } else {
                $configfield = new stdClass();
                $configfield->value = $value;
                $configfield->plugin = 'plagiarism';
                $configfield->name = $field;
                if (! $DB->insert_record('config_plugins', $configfield)) {
                    error("errorinserting");
                }
            }
        }
    }
    $c = new curl(array('proxy'=>true));
    $c->setopt(array('CURLOPT_HTTPAUTH' => CURLAUTH_BASIC, 'CURLOPT_USERPWD'=>$data->urkund_username.":".$data->urkund_password));
    $html = $c->post($data->urkund_api);
    $response = $c->getResponse();
    //now check to see if username/password is correct. - this check could probably be improved further.
    if ($c->info['http_code'] == '401') {
        //disable turnitin as this config isn't correct.
        $rec = $DB->get_record('config_plugins', array('name'=>'urkund_use', 'plugin'=>'plagiarism'));
        $rec->value = 0;
        $DB->update_record('config_plugins', $rec);
        echo $OUTPUT->notification(get_string('savedconfigfailed', 'plagiarism_urkund'));
    } else {
        echo $OUTPUT->notification(get_string('savedconfigsuccess', 'plagiarism_urkund'), 'notifysuccess');
    }
}
$plagiarismsettings = (array)get_config('plagiarism');
$mform->set_data($plagiarismsettings);

echo $OUTPUT->box_start('generalbox boxaligncenter', 'intro');
$mform->display();
echo $OUTPUT->box_end();
echo $OUTPUT->footer();