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<?php // $Id$
/**
* Action for adding an end of branch page
*
* @version $Id$
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package lesson
**/
require_sesskey();
// first get the preceeding page
$pageid = required_param('pageid', PARAM_INT);
$timenow = time();
// the new page is not the first page (end of branch always comes after an existing page)
if (!$page = get_record("lesson_pages", "id", $pageid)) {
error("Add end of branch: page record not found");
}
// chain back up to find the (nearest branch table)
$btpageid = $pageid;
if (!$btpage = get_record("lesson_pages", "id", $btpageid)) {
error("Add end of branch: btpage record not found");
}
while (($btpage->qtype != LESSON_BRANCHTABLE) AND ($btpage->prevpageid > 0)) {
$btpageid = $btpage->prevpageid;
if (!$btpage = get_record("lesson_pages", "id", $btpageid)) {
error("Add end of branch: btpage record not found");
}
}
if ($btpage->qtype == LESSON_BRANCHTABLE) {
$newpage = new stdClass;
$newpage->lessonid = $lesson->id;
$newpage->prevpageid = $pageid;
$newpage->nextpageid = $page->nextpageid;
$newpage->qtype = LESSON_ENDOFBRANCH;
$newpage->timecreated = $timenow;
$newpage->title = get_string("endofbranch", "lesson");
$newpage->contents = get_string("endofbranch", "lesson");
if (!$newpageid = insert_record("lesson_pages", $newpage)) {
error("Insert page: new page not inserted");
}
// update the linked list...
if (!set_field("lesson_pages", "nextpageid", $newpageid, "id", $pageid)) {
error("Add end of branch: unable to update link");
}
if ($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 = $btpageid;
if(!$newanswerid = insert_record("lesson_answers", $newanswer)) {
error("Add end of branch: answer record not inserted");
}
lesson_set_message(get_string('addedanendofbranch', 'lesson'), 'notifysuccess');
} else {
lesson_set_message(get_string('nobranchtablefound', 'lesson'));
}
redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");
?>
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