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<?php // $Id$
// Admin-only script to assign teachers to courses
require_once("../config.php");
define("MAX_USERS_PER_PAGE", 50);
$id = required_param('id',PARAM_INT); // course id
$add = optional_param('add', '', PARAM_ALPHA);
$remove = optional_param('remove', '', PARAM_ALPHA);
$search = optional_param('search', '', PARAM_CLEAN); // search string
require_login();
if (! $course = get_record("course", "id", $id)) {
error("Course ID was incorrect (can't find it)");
}
if (!(isteacheredit($course->id) and iscreator()) and
!(isteacheredit($course->id) and !empty($CFG->teacherassignteachers) ) ) {
error("You must be an administrator or course creator to use this page.");
}
$strassignteachers = get_string("assignteachers");
$strcourses = get_string("courses");
$strteachers = get_string("teachers");
$stradministration = get_string("administration");
$strexistingteachers = get_string("existingteachers");
$strnoexistingteachers = get_string("noexistingteachers");
$strpotentialteachers = get_string("potentialteachers");
$strnopotentialteachers = get_string("nopotentialteachers");
$straddteacher = get_string("addteacher");
$strremoveteacher = get_string("removeteacher");
$strsearch = get_string("search");
$strsearchresults = get_string("searchresults");
$strsearchagain = get_string("searchagain");
$strtoomanytoshow = get_string("toomanytoshow");
$strname = get_string("name");
$strorder = get_string("order");
$strrole = get_string("role");
$stredit = get_string("editingteachershort");
$stryes = get_string("yes");
$strno = get_string("no");
if ($search) {
$searchstring = $strsearchagain;
} else {
$searchstring = $strsearch;
}
if ($course->teachers != $strteachers) {
$parateachers = " ($course->teachers)";
} else {
$parateachers = "";
}
/// If data submitted, then process and store.
if ($form = data_submitted() and confirm_sesskey()) {
unset ($form->sesskey);
$rank = array();
// Peel out all the data from variable names.
foreach ($form as $key => $val) {
if ($key <> "id") {
$type = substr($key,0,1);
$num = substr($key,1);
$rank[$num][$type] = $val;
}
}
foreach ($rank as $num => $vals) {
if (! $teacher = get_record("user_teachers", "course", "$course->id", "userid", "$num")) {
error("No such teacher in course $course->shortname with user id $num");
}
$teacher->role = $vals['r'];
$teacher->authority = $vals['a'];
$teacher->editall = $vals['e'];
if (!update_record("user_teachers", $teacher)) {
error("Could not update teacher entry id = $teacher->id");
}
}
redirect("teacher.php?id=$course->id", get_string("changessaved"));
}
/// Print headers
print_header("$course->shortname: $strassignteachers",
"$course->fullname",
"<a href=\"index.php\">$strcourses</a> -> ".
"<a href=\"view.php?id=$course->id\">$course->shortname</a> -> ".
"$strassignteachers", "");
/// Add a teacher if one is specified
if (!empty($add) and confirm_sesskey()) {
if (! add_teacher($add, $course->id)) {
error("Could not add that teacher to this course!");
}
}
/// Remove a teacher if one is specified.
if (!empty($remove) and confirm_sesskey()) {
if (! remove_teacher($remove, $course->id)) {
error("Could not remove that teacher from this course!");
}
}
/// Display all current teachers for this course.
$teachers = get_course_teachers($course->id);
print_heading_with_help("$strexistingteachers $parateachers", "teachers");
if (empty($teachers)) {
echo "<p align=\"center\">$strnoexistingteachers</a>";
$teacherlist = "";
} else {
$table->head = array ("", $strname, $strorder, $strrole, $stredit, "&nbsp;");
$table->align = array ("right", "left", "center", "center", "center", "center");
$table->size = array ("35", "", "", "", "10", "");
$ordermenu = NULL;
$ordermenu[0] = get_string("hide");
for ($i=1; $i<=8; $i++) {
$ordermenu[$i] = $i;
}
$editmenu = NULL;
$editmenu[0] = $strno;
$editmenu[1] = $stryes;
$teacherarray = array();
echo "<form action=\"teacher.php\" method=\"post\">";
foreach ($teachers as $teacher) {
$teacherarray[] = $teacher->id;
$picture = print_user_picture($teacher->id, $course->id, $teacher->picture, false, true);
$authority = choose_from_menu ($ordermenu, "a$teacher->id", $teacher->authority, "", "", "", true);
if ($USER->id == $teacher->id) {
$editall = "<input name=\"e$teacher->id\" type=\"hidden\" value=\"1\" />$stryes";
} else {
$editall = choose_from_menu ($editmenu, "e$teacher->id", $teacher->editall, "", "", "", true);
}
$removelink = "<a href=\"teacher.php?id=$course->id&amp;remove=$teacher->id&amp;sesskey=$USER->sesskey\">$strremoveteacher</a>";
if (!$teacher->role) {
$teacher->role = $course->teacher;
}
$table->data[] = array ($picture, fullname($teacher, true), $authority,
"<input type=\"text\" name=\"r$teacher->id\" value=\"$teacher->role\" size=\"30\" maxlength=\"40\" />",
$editall, $removelink);
}
$teacherlist = implode(",",$teacherarray);
unset($teacherarray);
print_table($table);
echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
echo "<input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />";
echo "<center><input type=\"submit\" value=\"".get_string("savechanges")."\" /> ";
echo "</center>";
echo "</form>";
echo "<br />";
}
/// Print list of potential teachers
print_heading("$strpotentialteachers $parateachers");
$usercount = get_users(false, $search, true, $teacherlist);
if ($usercount == 0) {
echo "<p align=\"center\">$strnopotentialteachers</p>";
} else if ($usercount > MAX_USERS_PER_PAGE) {
echo "<p align=\"center\">$strtoomanytoshow ($usercount) </p>";
} else {
if ($search) {
echo "<p align=\"center\">($strsearchresults : $search)</p>";
}
if (!$users = get_users(true, $search, true, $teacherlist)) {
error("Could not get users!");
}
unset($table);
$table->head = array ("", get_string("name"), get_string("email"), "");
$table->align = array ("right", "left", "center", "center");
$table->size = array ("35", "", "", "");
foreach ($users as $user) {
$addlink = "<a href=\"teacher.php?id=$course->id&amp;add=$user->id&amp;sesskey=$USER->sesskey\">$straddteacher</a>";
$picture = print_user_picture($user->id, $course->id, $user->picture, false, true);
$table->data[] = array ($picture, fullname($user, true), $user->email, $addlink);
}
print_table($table);
}
if ($search or $usercount > MAX_USERS_PER_PAGE) {
echo "<center>";
echo "<form action=\"teacher.php\" method=\"get\">";
echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
echo "<input type=\"text\" name=\"search\" size=\"20\" />";
echo "<input type=\"submit\" value=\"$searchstring\" />";
echo "</form>";
echo "</center>";
}
print_footer($course);
?>
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