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<?php // $Id: student.php,v 1.31 2006/04/11 20:24:52 skodak Exp $
// Script to assign students to courses
require_once("../config.php");
define("MAX_USERS_PER_PAGE", 5000);
$id = required_param('id',PARAM_INT); // course id
$add = optional_param('add', 0, PARAM_BOOL);
$remove = optional_param('remove', 0, PARAM_BOOL);
$showall = optional_param('showall', 0, PARAM_BOOL);
$searchtext = optional_param('searchtext', '', PARAM_RAW); // search string
$previoussearch = optional_param('previoussearch', 0, PARAM_BOOL);
$previoussearch = ($searchtext != '') or ($previoussearch) ? 1:0;
if (! $site = get_site()) {
redirect("$CFG->wwwroot/$CFG->admin/index.php");
}
if (! $course = get_record("course", "id", $id)) {
error("Course ID was incorrect (can't find it)");
}
if ($course->metacourse) {
redirect("$CFG->wwwroot/course/importstudents.php?id=$course->id");
}
require_login($course->id);
if (!isteacheredit($course->id)) {
error("You must be an editing teacher in this course, or an admin");
}
$strassignstudents = get_string("assignstudents");
$strexistingstudents = get_string("existingstudents");
$strnoexistingstudents = get_string("noexistingstudents");
$strpotentialstudents = get_string("potentialstudents");
$strnopotentialstudents = get_string("nopotentialstudents");
$straddstudent = get_string("addstudent");
$strremovestudent = get_string("removestudent");
$strsearch = get_string("search");
$strsearchresults = get_string("searchresults");
$strstudents = get_string("students");
$strshowall = get_string("showall");
if ($course->students != $strstudents) {
$strassignstudents .= " ($course->students)";
$strpotentialstudents .= " ($course->students)";
$strexistingstudents .= " ($course->students)";
}
print_header("$course->shortname: $strassignstudents",
"$site->fullname",
"<a href=\"view.php?id=$course->id\">$course->shortname</a> -> $strassignstudents",
"studentform.searchtext");
/// Don't allow restricted teachers to even see this page (because it contains
/// a lot of email addresses and access to all student on the server
check_for_restricted_user($USER->username, "$CFG->wwwroot/course/view.php?id=$course->id");
/// Print a help notice about the need to use this page
if (!$frm = data_submitted()) {
$note = get_string("assignstudentsnote");
if ($course->password) {
$note .= "<p>".get_string("assignstudentspass", "",
"<a href=\"edit.php?id=$course->id\">$course->password</a>");
}
print_simple_box($note, "center", "50%");
/// A form was submitted so process the input
} else {
if ($add and !empty($frm->addselect) and confirm_sesskey()) {
if ($course->enrolperiod) {
$timestart = time();
$timeend = $timestart + $course->enrolperiod;
} else {
$timestart = $timeend = 0;
}
foreach ($frm->addselect as $addstudent) {
$addstudent = clean_param($addstudent, PARAM_INT);
if (! enrol_student($addstudent, $course->id, $timestart, $timeend)) {
error("Could not add student with id $addstudent to this course!");
}
}
} else if ($remove and !empty($frm->removeselect) and confirm_sesskey()) {
foreach ($frm->removeselect as $removestudent) {
$removestudent = clean_param($removestudent, PARAM_INT);
if (! unenrol_student($removestudent, $course->id)) {
error("Could not remove student with id $removestudent from this course!");
}
}
} else if ($showall) {
$searchtext = '';
$previoussearch = 0;
}
}
/// Get all existing students and teachers for this course.
if (!$students = get_course_students($course->id, "u.firstname ASC, u.lastname ASC", "", 0, 99999,
'', '', NULL, '', 'u.id,u.firstname,u.lastname,u.email')) {
$students = array();
}
if (!$teachers = get_course_teachers($course->id)) {
$teachers = array();
}
$existinguserarray = array();
foreach ($students as $student) {
$existinguserarray[] = $student->id;
}
foreach ($teachers as $teacher) {
$existinguserarray[] = $teacher->id;
}
$existinguserlist = implode(',', $existinguserarray);
unset($existinguserarray);
/// Get search results excluding any users already in this course
if (($searchtext != '') and $previoussearch) {
$searchusers = get_users(true, $searchtext, true, $existinguserlist, 'firstname ASC, lastname ASC',
'', '', 0, 99999, 'id, firstname, lastname, email');
$usercount = get_users(false, '', true, $existinguserlist);
}
/// If no search results then get potential students for this course excluding users already in course
if (empty($searchusers)) {
$usercount = get_users(false, '', true, $existinguserlist, 'firstname ASC, lastname ASC', '', '',
0, 99999, 'id, firstname, lastname, email') ;
$users = array();
if ($usercount <= MAX_USERS_PER_PAGE) {
$users = get_users(true, '', true, $existinguserlist, 'firstname ASC, lastname ASC', '', '',
0, 99999, 'id, firstname, lastname, email');
}
}
print_simple_box_start("center");
include('student.html');
print_simple_box_end();
print_footer($course);
?>
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