145 lines
4.0 KiB
PHP
145 lines
4.0 KiB
PHP
<?php
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/**
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* Register course widget.
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* Handles user's registration action.
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* Display a register to course form if required.
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*
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* @copyright (c) 2011 University of Geneva
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* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
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* @author Laurent Opprecht
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*/
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class RegisterCourseWidget
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{
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public const ACTION_SUBSCRIBE = 'subscribe';
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public const PARAM_SUBSCRIBE = 'subscribe';
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public const PARAM_PASSCODE = 'course_registration_code';
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/**
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* Returns $_POST data for $key is it exists or $default otherwise.
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*
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* @param string $key
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* @param object $default
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*
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* @return string
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*/
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public static function post($key, $default = '')
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{
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return isset($_POST[$key]) ? $_POST[$key] : $default;
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}
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/**
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* Returns $_GET data for $key is it exists or $default otherwise.
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*
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* @param string $key
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* @param object $default
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*
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* @return string
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*/
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public static function get($key, $default = '')
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{
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return isset($_GET[$key]) ? $_GET[$key] : $default;
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}
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/**
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* @return RegisterCourseWidget
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*/
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public static function factory()
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{
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return new self();
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}
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public function run()
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{
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return $this->action_subscribe_user();
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}
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/**
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* Handle the subscribe action.
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*
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* @return bool
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*/
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public function action_subscribe_user()
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{
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$action = self::get('action');
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if ($action != self::ACTION_SUBSCRIBE) {
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return false;
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}
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$course_code = self::post(self::PARAM_SUBSCRIBE);
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if (empty($course_code)) {
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return false;
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}
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$registration_code = self::post(self::PARAM_PASSCODE);
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if ($this->subscribe_user($course_code, $registration_code)) {
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echo Display::return_message(get_lang('EnrollToCourseSuccessful'), 'confirmation');
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return;
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}
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if (!empty($registration_code)) {
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echo Display::return_message(get_lang('CourseRegistrationCodeIncorrect'), 'error');
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}
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$this->display_form($course_code);
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return true;
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}
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/**
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* Regiser a user to a course.
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* Returns true on success, false otherwise.
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*
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* @param string $course_code
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* @param string $registration_code
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* @param int $user_id
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*
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* @return bool
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*/
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public function subscribe_user($course_code, $registration_code = '', $user_id = null)
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{
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$course = api_get_course_info($course_code);
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$course_regisration_code = $course['registration_code'];
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if (!empty($course_regisration_code) && $registration_code != $course_regisration_code) {
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return false;
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}
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if (empty($user_id)) {
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global $_user;
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$user_id = $_user['user_id'];
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}
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return (bool) CourseManager::subscribeUser($user_id, $course_code);
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}
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/**
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* Display the course registration form.
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* Asks for registration code/password.
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*
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* @param string $course_code
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*/
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public function display_form($course_code)
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{
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global $stok;
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$course = api_get_course_info($course_code);
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$self = $_SERVER['REQUEST_URI'];
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$course_code = $course['code'];
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$course_visual_code = $course['visual_code'];
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$course_title = $course['title'];
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$submit_registration_code_label = get_lang("SubmitRegistrationCode");
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$course_requires_password_label = get_lang('CourseRequiresPassword');
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$result = <<<EOT
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$course_requires_password_label<br/>
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$course_visual_code - $course_title
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<form action="$self" method="post">
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<input type="hidden" name="sec_token" value="$stok" />
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<input type="hidden" name="subscribe" value="$course_code" />
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<input type="text" name="course_registration_code" value="$registration_code" />
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<input type="Submit" name="submit_course_registration_code" value="OK" alt="$submit_registration_code_label" /></form>
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EOT;
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echo $result;
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}
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}
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