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337 lines
10 KiB
PHP
337 lines
10 KiB
PHP
<?php /// $Id$
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.org //
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// //
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// Copyright (C) 2004 Martin Dougiamas http://moodle.com //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation; either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details: //
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// //
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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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/**
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* enrolment_base is the base class for enrolment plugins
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*
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* This class provides all the functionality for an enrolment plugin
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* In fact it includes all the code for the default, "internal" method
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* so that other plugins can override these as necessary.
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*/
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class enrolment_base {
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var $errormsg;
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/**
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* Returns information about the courses a student has access to
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*
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* Set the $user->student course array
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* Set the $user->timeaccess course array
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*
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* @param user referenced object, must contain $user->id already set
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*/
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function get_student_courses(&$user) {
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if ($students = get_records("user_students", "userid", $user->id)) {
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$currenttime = time();
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foreach ($students as $student) {
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/// Is course visible?
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if (get_field("course", "visible", "id", $student->course)) {
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/// Is the student enrolment active right now?
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if ( ( $student->timestart == 0 or ( $currenttime > $student->timestart )) and
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( $student->timeend == 0 or ( $currenttime < $student->timeend )) ) {
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$user->student[$student->course] = true;
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$user->timeaccess[$student->course] = $student->timeaccess;
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}
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}
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}
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}
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}
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/**
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* Returns information about the courses a student has access to
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*
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* Set the $user->teacher course array
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* Set the $user->teacheredit course array
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* Set the $user->timeaccess course array
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*
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* @param user referenced object, must contain $user->id already set
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*/
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function get_teacher_courses(&$user) {
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if ($teachers = get_records("user_teachers", "userid", $user->id)) {
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$currenttime = time();
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foreach ($teachers as $teacher) {
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/// Is teacher only teaching this course for a specific time period?
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if ( ( $teacher->timestart == 0 or ( $currenttime > $teacher->timestart )) and
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( $teacher->timeend == 0 or ( $currenttime < $teacher->timeend )) ) {
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$user->teacher[$teacher->course] = true;
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if ($teacher->editall) {
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$user->teacheredit[$teacher->course] = true;
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}
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$user->timeaccess[$teacher->course] = $teacher->timeaccess;
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}
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}
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}
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}
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/**
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* Prints the entry form/page for this enrolment
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*
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* This is only called from course/enrol.php
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* Most plugins will probably override this to print payment
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* forms etc, or even just a notice to say that manual enrolment
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* is disabled
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*
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* @param course current course object
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*/
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function print_entry($course) {
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global $CFG, $USER, $SESSION, $THEME;
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$strloginto = get_string("loginto", "", $course->shortname);
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$strcourses = get_string("courses");
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/// Automatically enrol into courses without password
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if ($course->password == "") { // no password, so enrol
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if (isguest()) {
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add_to_log($course->id, "course", "guest", "view.php?id=$course->id", "$USER->id");
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} else if (empty($_GET['confirm'])) {
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print_header($strloginto, $course->fullname, "<a href=\".\">$strcourses</a> -> $strloginto");
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echo "<br />";
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notice_yesno(get_string("enrolmentconfirmation"), "enrol.php?id=$course->id&confirm=1", $CFG->wwwroot);
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print_footer();
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exit;
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} else {
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if ($course->enrolperiod) {
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$timestart = time();
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$timeend = time() + $course->enrolperiod;
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} else {
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$timestart = $timeend = 0;
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}
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if (! enrol_student($USER->id, $course->id, $timestart, $timeend)) {
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error("An error occurred while trying to enrol you.");
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}
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add_to_log($course->id, "course", "enrol", "view.php?id=$course->id", "$USER->id");
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$USER->student[$course->id] = true;
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if ($SESSION->wantsurl) {
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$destination = $SESSION->wantsurl;
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unset($SESSION->wantsurl);
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} else {
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$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
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}
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redirect($destination);
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}
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}
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$teacher = get_teacher($course->id);
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if (!isset($password)) {
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$password = "";
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}
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print_header($strloginto, $course->fullname, "<a href=\".\">$strcourses</a> -> $strloginto", "form.password");
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print_course($course);
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include("$CFG->dirroot/enrol/internal/enrol.html");
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print_footer();
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}
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/**
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* The other half to print_entry, this checks the form data
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*
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* This function checks that the user has completed the task on the
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* enrolment entry page and then enrolls them.
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*
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* @param form the form data submitted, as an object
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* @param course the current course, as an object
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*/
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function check_entry($form, $course) {
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global $CFG, $USER, $SESSION, $THEME;
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if ($form->password == $course->password) {
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if (isguest()) {
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add_to_log($course->id, "course", "guest", "view.php?id=$course->id", $_SERVER['REMOTE_ADDR']);
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} else { /// Update or add new enrolment
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if ($course->enrolperiod) {
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$timestart = time();
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$timeend = $timestart + $course->enrolperiod;
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} else {
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$timestart = $timeend = 0;
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}
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if (! enrol_student($USER->id, $course->id, $timestart, $timeend)) {
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error("An error occurred while trying to enrol you.");
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}
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$subject = get_string("welcometocourse", "", $course->fullname);
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$a->coursename = $course->fullname;
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$a->profileurl = "$CFG->wwwroot/user/view.php?id=$USER->id&course=$course->id";
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$message = get_string("welcometocoursetext", "", $a);
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if (! $teacher = get_teacher($course->id)) {
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$teacher = get_admin();
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}
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email_to_user($USER, $teacher, $subject, $message);
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add_to_log($course->id, "course", "enrol", "view.php?id=$course->id", "$USER->id");
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}
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$USER->student[$course->id] = true;
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if ($SESSION->wantsurl) {
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$destination = $SESSION->wantsurl;
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unset($SESSION->wantsurl);
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} else {
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$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
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}
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redirect($destination);
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} else {
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$this->errormsg = get_string("enrolmentkeyhint", "", substr($course->password,0,1));
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}
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}
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/**
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* Prints a form for configuring the current enrolment plugin
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*
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* This function is called from admin/enrol.php, and outputs a
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* full page with a form for defining the current enrolment plugin.
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*
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* @param page an object containing all the data for this page
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*/
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function config_form($page) {
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}
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/**
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* Processes and stored configuration data for the enrolment plugin
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*
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* Processes and stored configuration data for the enrolment plugin
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*
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* @param config all the configuration data as entered by the admin
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*/
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function process_config($config) {
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$return = true;
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foreach ($config as $name => $value) {
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if (!set_config($name, $value)) {
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$return = false;
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}
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}
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return $return;
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}
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/**
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* This function is run by admin/cron.php every time
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*
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* The cron function can perform regular checks for the current
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* enrollment plugin. For example it can check a foreign database,
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* all look for a file to pull data in from
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*
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*/
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function cron() {
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// Delete students from all courses where their enrolment period has expired
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$select = "timeend > '0' AND timeend < '" . time() . "'";
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if ($students = get_records_select('user_students', $select)) {
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foreach ($students as $student) {
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unenrol_student($student->userid, $student->course);
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}
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}
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if ($teachers = get_records_select('user_teachers', $select)) {
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foreach ($teachers as $teacher) {
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remove_teacher($teacher->userid, $teacher->course);
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}
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}
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}
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/**
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* Returns the relevant icons for a course
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*
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* Returns the relevant icons for a course
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*
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* @param course the current course, as an object
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*/
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function get_access_icons($course) {
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global $CFG;
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$str = '';
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if ($course->guest) {
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$strallowguests = get_string("allowguests");
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$str .= '<a title="'.$strallowguests.'" href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">';
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$str .= '<img vspace="4" alt="'.$strallowguests.'" height="16" width="16" border="0" '.
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'src="'.$CFG->pixpath.'/i/guest.gif" /></a> ';
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}
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if ($course->password) {
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$strrequireskey = get_string("requireskey");
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$str .= '<a title="'.$strrequireskey.'" href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">';
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$str .= '<img vspace="4" alt="'.$strrequireskey.'" height="16" width="16" border="0" src="'.$CFG->pixpath.'/i/key.gif" /></a>';
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}
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return $str;
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}
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} /// end of class
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?>
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