public function construction_override($pageid, lesson $lesson)
{
global $PAGE, $CFG, $DB;
require_sesskey();
$timenow = time();
if ($pageid == 0) {
if ($lesson->has_pages()) {
if (!($page = $DB->get_record("lesson_pages", array("prevpageid" => 0, "lessonid" => $lesson->id)))) {
print_error('cannotfindpagerecord', 'lesson');
}
} else {
// This is the ONLY page
$page = new stdClass();
$page->id = 0;
}
} else {
if (!($page = $DB->get_record("lesson_pages", array("id" => $pageid)))) {
print_error('cannotfindpagerecord', 'lesson');
}
}
$newpage = new stdClass();
$newpage->lessonid = $lesson->id;
$newpage->prevpageid = $pageid;
if ($pageid != 0) {
$newpage->nextpageid = $page->nextpageid;
} else {
$newpage->nextpageid = $page->id;
}
$newpage->qtype = $this->qtype;
$newpage->timecreated = $timenow;
$newpage->title = get_string("clustertitle", "lesson");
$newpage->contents = get_string("clustertitle", "lesson");
$newpageid = $DB->insert_record("lesson_pages", $newpage);
// update the linked list...
if ($pageid != 0) {
$DB->set_field("lesson_pages", "nextpageid", $newpageid, array("id" => $pageid));
}
if ($pageid == 0) {
$page->nextpageid = $page->id;
}
if ($page->nextpageid) {
// the new page is not the last page
$DB->set_field("lesson_pages", "prevpageid", $newpageid, array("id" => $page->nextpageid));
}
// ..and the single "answer"
$newanswer = new stdClass();
$newanswer->lessonid = $lesson->id;
$newanswer->pageid = $newpageid;
$newanswer->timecreated = $timenow;
$newanswer->jumpto = LESSON_CLUSTERJUMP;
$newanswerid = $DB->insert_record("lesson_answers", $newanswer);
$lesson->add_message(get_string('addedcluster', 'lesson'), 'notifysuccess');
redirect($CFG->wwwroot . '/mod/lesson/edit.php?id=' . $PAGE->cm->id);
}
