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moodlelib.php
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moodlelib.php
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<?PHP // $Id$
///////////////////////////////////////////////////////////////////////////
// //
// moodlelib.php //
// //
// Main library file of miscellaneous general-purpose Moodle functions //
// //
// Other main libraries: //
// //
// weblib.php - functions that produce web output //
// datalib.php - functions that access the database //
// //
///////////////////////////////////////////////////////////////////////////
// //
// NOTICE OF COPYRIGHT //
// //
// Moodle - Modular Object-Oriented Dynamic Learning Environment //
// http://moodle.org //
// //
// Copyright (C) 1999-2004 Martin Dougiamas http://dougiamas.com //
// //
// 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. //
// //
// This program 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: //
// //
// http://www.gnu.org/copyleft/gpl.html //
// //
///////////////////////////////////////////////////////////////////////////
/// CONSTANTS /////////////////////////////////////////////////////////////
define('NOGROUPS', 0);
define('SEPARATEGROUPS', 1);
define('VISIBLEGROUPS', 2);
/// PARAMETER HANDLING ////////////////////////////////////////////////////
function require_variable($var) {
/// Variable must be present
if (! isset($var)) {
error("A required parameter was missing");
}
}
function optional_variable(&$var, $default=0) {
/// Variable may be present, if not then set a default
if (! isset($var)) {
$var = $default;
}
}
function set_config($name, $value) {
/// No need for get_config because they are usually always available in $CFG
global $CFG;
$CFG->$name = $value; // So it's defined for this invocation at least
if (get_field("config", "name", "name", $name)) {
return set_field("config", "value", $value, "name", $name);
} else {
$config->name = $name;
$config->value = $value;
return insert_record("config", $config);
}
}
function reload_user_preferences() {
/// Refresh current USER with all their current preferences
global $USER;
unset($USER->preference);
if ($preferences = get_records('user_preferences', 'userid', $USER->id)) {
foreach ($preferences as $preference) {
$USER->preference[$preference->name] = $preference->value;
}
}
}
function set_user_preference($name, $value) {
/// Sets a preference for the current user
global $USER;
if (empty($name)) {
return false;
}
if ($preference = get_record('user_preferences', 'userid', $USER->id, 'name', $name)) {
if (set_field("user_preferences", "value", $value, "id", $preference->id)) {
$USER->preference[$name] = $value;
return true;
} else {
return false;
}
} else {
$preference->userid = $USER->id;
$preference->name = $name;
$preference->value = (string)$value;
if (insert_record('user_preferences', $preference)) {
$USER->preference[$name] = $value;
return true;
} else {
return false;
}
}
}
function set_user_preferences($prefarray) {
/// Sets a whole array of preferences for the current user
if (!is_array($prefarray) or empty($prefarray)) {
return false;
}
$return = true;
foreach ($prefarray as $name => $value) {
// The order is important; if the test for return is done first,
// then if one function call fails all the remaining ones will
// be "optimized away"
$return = set_user_preference($name, $value) and $return;
}
return $return;
}
function get_user_preferences($name=NULL, $default=NULL) {
/// Without arguments, returns all the current user preferences
/// as an array. If a name is specified, then this function
/// attempts to return that particular preference value. If
/// none is found, then the optional value $default is returned,
/// otherwise NULL.
global $USER;
if (empty($USER->preference)) {
return $default; // Default value (or NULL)
}
if (empty($name)) {
return $USER->preference; // Whole array
}
if (!isset($USER->preference[$name])) {
return $default; // Default value (or NULL)
}
return $USER->preference[$name]; // The single value
}
/// FUNCTIONS FOR HANDLING TIME ////////////////////////////////////////////
function make_timestamp($year, $month=1, $day=1, $hour=0, $minute=0, $second=0, $timezone=99) {
/// Given date parts in user time, produce a GMT timestamp
$timezone = get_user_timezone($timezone);
if (abs($timezone) > 13) {
return mktime((int)$hour,(int)$minute,(int)$second,(int)$month,(int)$day,(int)$year);
} else {
$time = gmmktime((int)$hour,(int)$minute,(int)$second,(int)$month,(int)$day,(int)$year);
return usertime($time, $timezone); // This is GMT
}
}
function format_time($totalsecs, $str=NULL) {
/// Given an amount of time in seconds, returns string
/// formatted nicely as months, days, hours etc as needed
$totalsecs = abs($totalsecs);
if (!$str) { // Create the str structure the slow way
$str->day = get_string("day");
$str->days = get_string("days");
$str->hour = get_string("hour");
$str->hours = get_string("hours");
$str->min = get_string("min");
$str->mins = get_string("mins");
$str->sec = get_string("sec");
$str->secs = get_string("secs");
}
$days = floor($totalsecs/86400);
$remainder = $totalsecs - ($days*86400);
$hours = floor($remainder/3600);
$remainder = $remainder - ($hours*3600);
$mins = floor($remainder/60);
$secs = $remainder - ($mins*60);
$ss = ($secs == 1) ? $str->sec : $str->secs;
$sm = ($mins == 1) ? $str->min : $str->mins;
$sh = ($hours == 1) ? $str->hour : $str->hours;
$sd = ($days == 1) ? $str->day : $str->days;
$odays = "";
$ohours = "";
$omins = "";
$osecs = "";
if ($days) $odays = "$days $sd";
if ($hours) $ohours = "$hours $sh";
if ($mins) $omins = "$mins $sm";
if ($secs) $osecs = "$secs $ss";
if ($days) return "$odays $ohours";
if ($hours) return "$ohours $omins";
if ($mins) return "$omins $osecs";
if ($secs) return "$osecs";
return get_string("now");
}
function userdate($date, $format="", $timezone=99, $fixday = true) {
/// Returns a formatted string that represents a date in user time
/// WARNING: note that the format is for strftime(), not date().
/// Because of a bug in most Windows time libraries, we can't use
/// the nicer %e, so we have to use %d which has leading zeroes.
/// A lot of the fuss below is just getting rid of these leading
/// zeroes as efficiently as possible.
///
/// If parammeter fixday = true (default), then take off leading
/// zero from %d, else mantain it.
if ($format == "") {
$format = get_string("strftimedaydatetime");
}
$formatnoday = str_replace("%d", "DD", $format);
if ($fixday) {
$fixday = ($formatnoday != $format);
}
$timezone = get_user_timezone($timezone);
if (abs($timezone) > 13) {
if ($fixday) {
$datestring = strftime($formatnoday, $date);
$daystring = str_replace(" 0", "", strftime(" %d", $date));
$datestring = str_replace("DD", $daystring, $datestring);
} else {
$datestring = strftime($format, $date);
}
} else {
$date = $date + (int)($timezone * 3600);
if ($fixday) {
$datestring = gmstrftime($formatnoday, $date);
$daystring = str_replace(" 0", "", gmstrftime(" %d", $date));
$datestring = str_replace("DD", $daystring, $datestring);
} else {
$datestring = gmstrftime($format, $date);
}
}
return $datestring;
}
function usergetdate($date, $timezone=99) {
/// Given a $date timestamp in GMT, returns an array
/// that represents the date in user time
$timezone = get_user_timezone($timezone);
if (abs($timezone) > 13) {
return getdate($date);
}
//There is no gmgetdate so I have to fake it...
$date = $date + (int)($timezone * 3600);
$getdate["seconds"] = gmstrftime("%S", $date);
$getdate["minutes"] = gmstrftime("%M", $date);
$getdate["hours"] = gmstrftime("%H", $date);
$getdate["mday"] = gmstrftime("%d", $date);
$getdate["wday"] = gmstrftime("%u", $date);
$getdate["mon"] = gmstrftime("%m", $date);
$getdate["year"] = gmstrftime("%Y", $date);
$getdate["yday"] = gmstrftime("%j", $date);
$getdate["weekday"] = gmstrftime("%A", $date);
$getdate["month"] = gmstrftime("%B", $date);
return $getdate;
}
function usertime($date, $timezone=99) {
/// Given a GMT timestamp (seconds since epoch), offsets it by
/// the timezone. eg 3pm in India is 3pm GMT - 7 * 3600 seconds
$timezone = get_user_timezone($timezone);
if (abs($timezone) > 13) {
return $date;
}
return $date - (int)($timezone * 3600);
}
function usergetmidnight($date, $timezone=99) {
/// Given a time, return the GMT timestamp of the most recent midnight
/// for the current user.
$timezone = get_user_timezone($timezone);
$userdate = usergetdate($date, $timezone);
if (abs($timezone) > 13) {
return mktime(0, 0, 0, $userdate["mon"], $userdate["mday"], $userdate["year"]);
}
$timemidnight = gmmktime (0, 0, 0, $userdate["mon"], $userdate["mday"], $userdate["year"]);
return usertime($timemidnight, $timezone); // Time of midnight of this user's day, in GMT
}
function usertimezone($timezone=99) {
/// Returns a string that prints the user's timezone
$timezone = get_user_timezone($timezone);
if (abs($timezone) > 13) {
return "server time";
}
if (abs($timezone) < 0.5) {
return "GMT";
}
if ($timezone > 0) {
return "GMT+$timezone";
} else {
return "GMT$timezone";
}
}
function get_user_timezone($tz = 99) {
// Returns a float which represents the user's timezone difference from GMT in hours
// Checks various settings and picks the most dominant of those which have a value
// Variables declared explicitly global here so that if we add
// something later we won't forget to global it...
$timezones = array(
isset($GLOBALS['USER']->timezone) ? $GLOBALS['USER']->timezone : 99,
isset($GLOBALS['CFG']->timezone) ? $GLOBALS['CFG']->timezone : 99,
);
while($tz == 99 && $next = each($timezones)) {
$tz = (float)$next['value'];
}
return $tz;
}
/// USER AUTHENTICATION AND LOGIN ////////////////////////////////////////
function require_login($courseid=0) {
/// This function checks that the current user is logged in, and optionally
/// whether they are "logged in" or allowed to be in a particular course.
/// If not, then it redirects them to the site login or course enrolment.
global $CFG, $SESSION, $USER, $FULLME, $MoodleSession;
// First check that the user is logged in to the site.
if (! (isset($USER->loggedin) and $USER->confirmed and ($USER->site == $CFG->wwwroot)) ) { // They're not
$SESSION->wantsurl = $FULLME;
if (!empty($_SERVER["HTTP_REFERER"])) {
$SESSION->fromurl = $_SERVER["HTTP_REFERER"];
}
$USER = NULL;
redirect("$CFG->wwwroot/login/index.php");
die;
}
// Check that the user account is properly set up
if (user_not_fully_set_up($USER)) {
$site = get_site();
redirect("$CFG->wwwroot/user/edit.php?id=$USER->id&course=$site->id");
die;
}
// Next, check if the user can be in a particular course
if ($courseid) {
if (!empty($USER->student[$courseid]) or !empty($USER->teacher[$courseid]) or !empty($USER->admin)) {
if (isset($USER->realuser)) { // Make sure the REAL person can also access this course
if (!isteacher($courseid, $USER->realuser)) {
print_header();
notice(get_string("studentnotallowed", "", fullname($USER, true)), "$CFG->wwwroot/");
}
} else { // just update their last login time
update_user_in_db();
}
return; // user is a member of this course.
}
if (! $course = get_record("course", "id", $courseid)) {
error("That course doesn't exist");
}
if (!$course->visible) {
print_header();
notice(get_string("studentnotallowed", "", fullname($USER, true)), "$CFG->wwwroot/");
}
if ($USER->username == "guest") {
switch ($course->guest) {
case 0: // Guests not allowed
print_header();
notice(get_string("guestsnotallowed", "", $course->fullname));
break;
case 1: // Guests allowed
update_user_in_db();
return;
case 2: // Guests allowed with key (drop through)
break;
}
}
// Currently not enrolled in the course, so see if they want to enrol
$SESSION->wantsurl = $FULLME;
redirect("$CFG->wwwroot/course/enrol.php?id=$courseid");
die;
}
}
function update_user_login_times() {
global $USER;
$USER->lastlogin = $user->lastlogin = $USER->currentlogin;
$USER->currentlogin = $user->currentlogin = time();
$user->id = $USER->id;
return update_record("user", $user);
}
function user_not_fully_set_up($user) {
return ($user->username != "guest" and (empty($user->firstname) or empty($user->lastname) or empty($user->email)));
}
function update_login_count() {
/// Keeps track of login attempts
global $SESSION;
$max_logins = 10;
if (empty($SESSION->logincount)) {
$SESSION->logincount = 1;
} else {
$SESSION->logincount++;
}
if ($SESSION->logincount > $max_logins) {
unset($SESSION->wantsurl);
error(get_string("errortoomanylogins"));
}
}
function reset_login_count() {
/// Resets login attempts
global $SESSION;
$SESSION->logincount = 0;
}
function check_for_restricted_user($username=NULL, $redirect="") {
global $CFG, $USER;
if (!$username) {
if (!empty($USER->username)) {
$username = $USER->username;
} else {
return false;
}
}
if (!empty($CFG->restrictusers)) {
$names = explode(',', $CFG->restrictusers);
if (in_array($username, $names)) {
error(get_string("restricteduser", "error", fullname($USER)), $redirect);
}
}
}
function isadmin($userid=0) {
/// Is the user an admin?
global $USER;
static $admins = array();
static $nonadmins = array();
if (!$userid){
if (empty($USER->id)) {
return false;
}
$userid = $USER->id;
}
if (in_array($userid, $admins)) {
return true;
} else if (in_array($userid, $nonadmins)) {
return false;
} else if (record_exists("user_admins", "userid", $userid)){
$admins[] = $userid;
return true;
} else {
$nonadmins[] = $userid;
return false;
}
}
function isteacher($courseid, $userid=0, $includeadmin=true) {
/// Is the user a teacher or admin?
global $USER;
if ($includeadmin and isadmin($userid)) { // admins can do anything the teacher can
return true;
}
if (!$userid) {
return !empty($USER->teacher[$courseid]);
}
return record_exists("user_teachers", "userid", $userid, "course", $courseid);
}
function isteacheredit($courseid, $userid=0) {
/// Is the user allowed to edit this course?
global $USER;
if (isadmin($userid)) { // admins can do anything
return true;
}
if (!$userid) {
return !empty($USER->teacheredit[$courseid]);
}
return get_field("user_teachers", "editall", "userid", $userid, "course", $courseid);
}
function iscreator ($userid=0) {
/// Can user create new courses?
global $USER;
if (empty($USER->id)) {
return false;
}
if (isadmin($userid)) { // admins can do anything
return true;
}
if (empty($userid)) {
return record_exists("user_coursecreators", "userid", $USER->id);
}
return record_exists("user_coursecreators", "userid", $userid);
}
function isstudent($courseid, $userid=0) {
/// Is the user a student in this course?
global $USER;
if (!$userid) {
return !empty($USER->student[$courseid]);
}
// $timenow = time(); // todo: add time check below
return record_exists("user_students", "userid", $userid, "course", $courseid);
}
function isguest($userid=0) {
/// Is the user a guest?
global $USER;
if (!$userid) {
if (empty($USER->username)) {
return false;
}
return ($USER->username == "guest");
}
return record_exists("user", "id", $userid, "username", "guest");
}
function isediting($courseid, $user=NULL) {
/// Is the current user in editing mode?
global $USER;
if (!$user){
$user = $USER;
}
if (empty($user->editing)) {
return false;
}
return ($user->editing and isteacher($courseid, $user->id));
}
function ismoving($courseid) {
/// Is the current user currently moving an activity?
global $USER;
if (!empty($USER->activitycopy)) {
return ($USER->activitycopycourse == $courseid);
}
return false;
}
function fullname($user, $override=false) {
/// Given an object containing firstname and lastname
/// values, this function returns a string with the
/// full name of the person.
/// The result may depend on system settings
/// or language. 'override' will force both names
/// to be used even if system settings specify one.
global $CFG, $SESSION;
if (!empty($SESSION->fullnamedisplay)) {
$CFG->fullnamedisplay = $SESSION->fullnamedisplay;
}
if ($CFG->fullnamedisplay == 'firstname lastname') {
return "$user->firstname $user->lastname";
} else if ($CFG->fullnamedisplay == 'lastname firstname') {
return "$user->lastname $user->firstname";
} else if ($CFG->fullnamedisplay == 'firstname') {
if ($override) {
return get_string('fullnamedisplay', '', $user);
} else {
return $user->firstname;
}
}
return get_string('fullnamedisplay', '', $user);
}
function set_moodle_cookie($thing) {
/// Sets a moodle cookie with an encrypted string
global $CFG;
$cookiename = 'MOODLEID_'.$CFG->sessioncookie;
$days = 60;
$seconds = 60*60*24*$days;
setCookie($cookiename, "", time() - 3600, "/");
setCookie($cookiename, rc4encrypt($thing), time()+$seconds, "/");
}
function get_moodle_cookie() {
/// Gets a moodle cookie with an encrypted string
global $CFG;
$cookiename = 'MOODLEID_'.$CFG->sessioncookie;
if (empty($_COOKIE[$cookiename])) {
return "";
} else {
return rc4decrypt($_COOKIE[$cookiename]);
}
}
function is_internal_auth() {
/// Returns true if an internal authentication method is being used.
global $CFG;
return ($CFG->auth == "email" || $CFG->auth == "none" || $CFG->auth == "manual");
}
function create_user_record($username, $password) {
/// Creates a bare-bones user record
global $REMOTE_ADDR, $CFG;
//just in case check text case
$username = trim(moodle_strtolower($username));
if (function_exists(auth_get_userinfo)) {
if ($newinfo = auth_get_userinfo($username)) {
foreach ($newinfo as $key => $value){
$newuser->$key = addslashes(stripslashes($value)); // Just in case
}
}
}
$newuser->username = $username;
$newuser->password = md5($password);
$newuser->lang = $CFG->lang;
$newuser->confirmed = 1;
$newuser->lastIP = $REMOTE_ADDR;
$newuser->timemodified = time();
if (insert_record("user", $newuser)) {
return get_user_info_from_db("username", $username);
}
return false;
}
function guest_user() {
global $CFG;
if ($newuser = get_record("user", "username", "guest")) {
$newuser->loggedin = true;
$newuser->confirmed = 1;
$newuser->site = $CFG->wwwroot;
$newuser->lang = $CFG->lang;
}
return $newuser;
}
function authenticate_user_login($username, $password) {
/// Given a username and password, this function looks them
/// up using the currently selected authentication mechanism,
/// and if the authentication is successful, it returns a
/// valid $user object from the 'user' table.
///
/// Uses auth_ functions from the currently active auth module
global $CFG;
$md5password = md5($password);
if (empty($CFG->auth)) {
$CFG->auth = "email"; // Default authentication module
}
if ($username == "guest") {
$CFG->auth = "none"; // Guest account always internal
}
// If this is the admin, then just use internal methods
// Doing this first (even though it's less efficient) because
// the chosen authentication method might hang and lock the
// admin out.
if (adminlogin($username, $md5password)) {
return get_user_info_from_db("username", $username);
}
// OK, the user is a normal user, so try and authenticate them
require_once("$CFG->dirroot/auth/$CFG->auth/lib.php");
if (auth_user_login($username, $password)) { // Successful authentication
if ($user = get_user_info_from_db("username", $username)) {
if ($md5password <> $user->password) { // Update local copy of password for reference
set_field("user", "password", $md5password, "username", $username);
}
} else {
$user = create_user_record($username, $password);
}
if (function_exists('auth_iscreator')) { // Check if the user is a creator
if (auth_iscreator($username)) {
if (! record_exists("user_coursecreators", "userid", $user->id)) {
$cdata['userid']=$user->id;
$creator = insert_record("user_coursecreators",$cdata);
if (! $creator) {
error("Cannot add user to course creators.");
}
}
} else {
if ( record_exists("user_coursecreators", "userid", $user->id)) {
$creator = delete_records("user_coursecreators", "userid", $user->id);
if (! $creator) {
error("Cannot remove user from course creators.");
}
}
}
}
return $user;
} else {
return false;
}
}
function enrol_student($userid, $courseid) {
/// Enrols a student in a given course
if (!record_exists("user_students", "userid", $userid, "course", $courseid)) {
if (record_exists("user", "id", $userid)) {
$student->userid = $userid;
$student->course = $courseid;
$student->start = 0;
$student->end = 0;
$student->time = time();
return insert_record("user_students", $student);
}
return false;
}
return true;
}
function unenrol_student($userid, $courseid=0) {
/// Unenrols a student from a given course
if ($courseid) {
/// First delete any crucial stuff that might still send mail
if ($forums = get_records("forum", "course", $courseid)) {
foreach ($forums as $forum) {
delete_records("forum_subscriptions", "forum", $forum->id, "userid", $userid);
}
}
if ($groups = get_groups($courseid, $userid)) {
foreach ($groups as $group) {
delete_records("groups_members", "groupid", $group->id, "userid", $userid);
}
}
return delete_records("user_students", "userid", $userid, "course", $courseid);
} else {
delete_records("forum_subscriptions", "userid", $userid);
delete_records("groups_members", "userid", $userid);
return delete_records("user_students", "userid", $userid);
}
}
function add_teacher($userid, $courseid) {
/// Add a teacher to a given course
if (!record_exists("user_teachers", "userid", $userid, "course", $courseid)) {
if (record_exists("user", "id", $userid)) {
$teacher->userid = $userid;
$teacher->course = $courseid;
$teacher->editall = 1;
$teacher->role = "";
if (record_exists("user_teachers", "course", $courseid)) {
$teacher->authority = 2;
} else {
$teacher->authority = 1;
}
delete_records("user_students", "userid", $userid, "course", $courseid); // Unenrol as student
return insert_record("user_teachers", $teacher);
}
return false;
}
return true;
}
function remove_teacher($userid, $courseid=0) {
/// Removes a teacher from a given course (or ALL courses)
/// Does not delete the user account
if ($courseid) {
/// First delete any crucial stuff that might still send mail
if ($forums = get_records("forum", "course", $courseid)) {
foreach ($forums as $forum) {
delete_records("forum_subscriptions", "forum", $forum->id, "userid", $userid);
}
}
return delete_records("user_teachers", "userid", $userid, "course", $courseid);
} else {
delete_records("forum_subscriptions", "userid", $userid);
return delete_records("user_teachers", "userid", $userid);
}
}
function add_creator($userid) {
/// Add a creator to the site
if (!record_exists("user_admins", "userid", $userid)) {
if (record_exists("user", "id", $userid)) {
$creator->userid = $userid;
return insert_record("user_coursecreators", $creator);
}
return false;
}
return true;
}
function remove_creator($userid) {
/// Removes a creator from a site
global $db;
return delete_records("user_coursecreators", "userid", $userid);
}
function add_admin($userid) {
/// Add an admin to the site
if (!record_exists("user_admins", "userid", $userid)) {
if (record_exists("user", "id", $userid)) {
$admin->userid = $userid;
return insert_record("user_admins", $admin);
}
return false;
}
return true;
}
function remove_admin($userid) {
/// Removes an admin from a site
global $db;
return delete_records("user_admins", "userid", $userid);
}
function remove_course_contents($courseid, $showfeedback=true) {
/// Clear a course out completely, deleting all content
/// but don't delete the course itself
global $CFG, $THEME, $USER, $SESSION;
$result = true;
if (! $course = get_record("course", "id", $courseid)) {
error("Course ID was incorrect (can't find it)");
}
$strdeleted = get_string("deleted");
// First delete every instance of every module
if ($allmods = get_records("modules") ) {
foreach ($allmods as $mod) {
$modname = $mod->name;
$modfile = "$CFG->dirroot/mod/$modname/lib.php";
$moddelete = $modname."_delete_instance"; // Delete everything connected to an instance
$moddeletecourse = $modname."_delete_course"; // Delete other stray stuff (uncommon)
$count=0;
if (file_exists($modfile)) {
include_once($modfile);
if (function_exists($moddelete)) {
if ($instances = get_records($modname, "course", $course->id)) {
foreach ($instances as $instance) {
if ($moddelete($instance->id)) {
$count++;
} else {
notify("Could not delete $modname instance $instance->id ($instance->name)");
$result = false;
}
}
}
} else {
notify("Function $moddelete() doesn't exist!");
$result = false;
}
if (function_exists($moddeletecourse)) {
$moddeletecourse($course);
}
}
if ($showfeedback) {
notify("$strdeleted $count x $modname");
}
}
} else {
error("No modules are installed!");
}
// Delete any user stuff
if (delete_records("user_students", "course", $course->id)) {
if ($showfeedback) {
notify("$strdeleted user_students");
}
} else {
$result = false;
}
if (delete_records("user_teachers", "course", $course->id)) {
if ($showfeedback) {
notify("$strdeleted user_teachers");
}
} else {
$result = false;
}
// Delete any groups
if ($groups = get_records("groups", "courseid", $course->id)) {
foreach ($groups as $group) {
if (delete_records("groups_members", "groupid", $group->id)) {
if ($showfeedback) {
notify("$strdeleted groups_members");
}
} else {
$result = false;
}
if (delete_records("groups", "id", $group->id)) {
if ($showfeedback) {
notify("$strdeleted groups");
}
} else {
$result = false;
}
}
}
// Delete events
if (delete_records("event", "courseid", $course->id)) {
if ($showfeedback) {
notify("$strdeleted event");
}
} else {
$result = false;
}
// Delete logs