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<?php
/************** add cluster ************************************/
if (!isteacher($course->id)) {
error("Only teachers can look at this page");
}
confirm_sesskey();
// first get the preceeding page
// if $pageid = 0, then we are inserting a new page at the beginning of the lesson
$pageid = required_param('pageid', PARAM_INT);
$timenow = time();
if ($pageid == 0) {
if (!$page = get_record("lesson_pages", "prevpageid", 0, "lessonid", $lesson->id)) {
error("Error: Add cluster: page record not found");
}
} else {
if (!$page = get_record("lesson_pages", "id", $pageid)) {
error("Error: Add cluster: page record not found");
}
}
$newpage = new stdClass;
$newpage->lessonid = $lesson->id;
$newpage->prevpageid = $pageid;
if ($pageid != 0) {
$newpage->nextpageid = $page->nextpageid;
} else {
$newpage->nextpageid = $page->id;
}
$newpage->qtype = LESSON_CLUSTER;
$newpage->timecreated = $timenow;
$newpage->title = get_string("clustertitle", "lesson");
$newpage->contents = get_string("clustertitle", "lesson");
if (!$newpageid = insert_record("lesson_pages", $newpage)) {
error("Insert page: new page not inserted");
}
// update the linked list...
if ($pageid != 0) {
if (!set_field("lesson_pages", "nextpageid", $newpageid, "id", $pageid)) {
error("Add cluster: unable to update link");
}
}
if ($pageid == 0) {
$page->nextpageid = $page->id;
}
if ($page->nextpageid) {
// the new page is not the last page
if (!set_field("lesson_pages", "prevpageid", $newpageid, "id", $page->nextpageid)) {
error("Insert page: unable to update previous link");
}
}
// ..and the single "answer"
$newanswer = new stdClass;
$newanswer->lessonid = $lesson->id;
$newanswer->pageid = $newpageid;
$newanswer->timecreated = $timenow;
$newanswer->jumpto = LESSON_CLUSTERJUMP;
if(!$newanswerid = insert_record("lesson_answers", $newanswer)) {
error("Add cluster: answer record not inserted");
}
redirect("view.php?id=$cm->id", get_string('addedcluster', 'lesson'));
?>
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