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moodle/question/question.php

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<?php
/**
* Page for editing questions using the new form library.
*
* @author T.J.Hunt@open.ac.uk
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package questionbank
*//** */
// Includes.
require_once(dirname(__FILE__) . '/../config.php');
require_once(dirname(__FILE__) . '/editlib.php');
require_once($CFG->libdir . '/filelib.php');
require_once($CFG->libdir . '/formslib.php');
// Read URL parameters telling us which question to edit.
$id = optional_param('id', 0, PARAM_INT); // question id
$qtype = optional_param('qtype', '', PARAM_FILE);
$categoryid = optional_param('category', 0, PARAM_INT);
$cmid = optional_param('cmid', 0, PARAM_INT);
$courseid = optional_param('courseid', 0, PARAM_INT);
$wizardnow = optional_param('wizardnow', '', PARAM_ALPHA);
$movecontext = optional_param('movecontext', 0, PARAM_BOOL); // Switch to make
// question uneditable - form is displayed to edit category only
$originalreturnurl = optional_param('returnurl', 0, PARAM_LOCALURL);
$appendqnumstring = optional_param('appendqnumstring', '', PARAM_ALPHA);
$inpopup = optional_param('inpopup', 0, PARAM_BOOL);
$url = new moodle_url('/question/question.php');
if ($id !== 0) {
$url->param('id', $id);
}
if ($qtype !== '') {
$url->param('qtype', $qtype);
}
if ($categoryid !== 0) {
$url->param('category', $categoryid);
}
if ($cmid !== 0) {
$url->param('cmid', $cmid);
}
if ($courseid !== 0) {
$url->param('courseid', $courseid);
}
if ($wizardnow !== '') {
$url->param('wizardnow', $wizardnow);
}
if ($movecontext !== 0) {
$url->param('movecontext', $movecontext);
}
if ($originalreturnurl !== 0) {
$url->param('returnurl', $originalreturnurl);
}
if ($appendqnumstring !== '') {
$url->param('appendqnumstring', $appendqnumstring);
}
if ($inpopup !== 0) {
$url->param('inpopup', $inpopup);
}
$PAGE->set_url($url);
if ($originalreturnurl && $wizardnow == '') {
$returnurl = $CFG->wwwroot . '/' . $originalreturnurl;
} else if ($originalreturnurl && $wizardnow !== ''){
$returnurl = $originalreturnurl;
}else {
$returnurl = "{$CFG->wwwroot}/question/edit.php?courseid={$COURSE->id}";
}
if ($movecontext && !$id){
print_error('questiondoesnotexist', 'question', $returnurl);
}
if ($cmid){
list($module, $cm) = get_module_from_cmid($cmid);
require_login($cm->course, false, $cm);
$thiscontext = get_context_instance(CONTEXT_MODULE, $cmid);
} elseif ($courseid) {
require_login($courseid, false);
$PAGE->set_pagelayout('course');
$thiscontext = get_context_instance(CONTEXT_COURSE, $courseid);
$module = null;
$cm = null;
} else {
print_error('missingcourseorcmid', 'question');
}
$contexts = new question_edit_contexts($thiscontext);
if (optional_param('addcancel', false, PARAM_BOOL)) {
redirect($returnurl);
}
if ($id) {
if (!$question = $DB->get_record('question', array('id' => $id))) {
print_error('questiondoesnotexist', 'question', $returnurl);
}
get_question_options($question, true);
} else if ($categoryid && $qtype) { // only for creating new questions
$question = new stdClass;
$question->category = $categoryid;
$question->qtype = $qtype;
// Check that users are allowed to create this question type at the moment.
$allowedtypes = question_type_menu();
if (!isset($allowedtypes[$qtype])) {
print_error('cannotenable', 'question', $returnurl, $qtype);
}
} else if ($categoryid) {
// Category, but no qtype. They probably came from the addquestion.php
// script without choosing a question type. Send them back.
$addurl = new moodle_url('/question/addquestion.php', $url->params());
$addurl->param('validationerror', 1);
redirect($addurl);
} else {
print_error('notenoughdatatoeditaquestion', 'question', $returnurl);
}
// Validate the question category.
if (!$category = $DB->get_record('question_categories', array('id' => $question->category))) {
print_error('categorydoesnotexist', 'question', $returnurl);
}
// Check permissions
$question->formoptions = new stdClass;
$categorycontext = get_context_instance_by_id($category->contextid);
$addpermission = has_capability('moodle/question:add', $categorycontext);
if ($id) {
$canview = question_has_capability_on($question, 'view');
if ($movecontext){
$question->formoptions->canedit = false;
$question->formoptions->canmove = (question_has_capability_on($question, 'move') && $contexts->have_cap('moodle/question:add'));
$question->formoptions->cansaveasnew = false;
$question->formoptions->repeatelements = false;
$question->formoptions->movecontext = true;
$formeditable = true;
question_require_capability_on($question, 'view');
} else {
$question->formoptions->canedit = question_has_capability_on($question, 'edit');
$question->formoptions->canmove = (question_has_capability_on($question, 'move') && $addpermission);
$question->formoptions->cansaveasnew = (($canview ||question_has_capability_on($question, 'edit')) && $addpermission);
$question->formoptions->repeatelements = ($question->formoptions->canedit || $question->formoptions->cansaveasnew);
$formeditable = $question->formoptions->canedit || $question->formoptions->cansaveasnew || $question->formoptions->canmove;
$question->formoptions->movecontext = false;
if (!$formeditable){
question_require_capability_on($question, 'view');
}
}
} else { // creating a new question
require_capability('moodle/question:add', $categorycontext);
$formeditable = true;
$question->formoptions->canedit = question_has_capability_on($question, 'edit');
$question->formoptions->canmove = (question_has_capability_on($question, 'move') && $addpermission);
$question->formoptions->repeatelements = true;
$question->formoptions->movecontext = false;
}
// Validate the question type.
if (!isset($QTYPES[$question->qtype])) {
print_error('unknownquestiontype', 'question', $returnurl, $question->qtype);
}
$PAGE->set_pagetype('question-type-' . $question->qtype);
// Create the question editing form.
if ($wizardnow!=='' && !$movecontext){
if (!method_exists($QTYPES[$question->qtype], 'next_wizard_form')){
print_error('missingimportantcode', 'question', $returnurl, 'wizard form definition');
} else {
$mform = $QTYPES[$question->qtype]->next_wizard_form('question.php', $question, $wizardnow, $formeditable);
}
} else {
$mform = $QTYPES[$question->qtype]->create_editing_form('question.php', $question, $category, $contexts, $formeditable);
}
if ($mform === null) {
print_error('missingimportantcode', 'question', $returnurl, 'question editing form definition for "'.$question->qtype.'"');
}
$toform = fullclone($question); // send the question object and a few more parameters to the form
$toform->category = "$category->id,$category->contextid";
if ($formeditable && $id){
$toform->categorymoveto = $toform->category;
}
$toform->appendqnumstring = $appendqnumstring;
$toform->returnurl = $originalreturnurl;
$toform->movecontext = $movecontext;
if ($cm !== null){
$toform->cmid = $cm->id;
$toform->courseid = $cm->course;
} else {
$toform->courseid = $COURSE->id;
}
$toform->inpopup = $inpopup;
$mform->set_data($toform);
if ($mform->is_cancelled()){
if ($inpopup) {
close_window();
} else {
$nexturl = new moodle_url($returnurl);
if (!empty($question->id)) {
$nexturl->param('lastchanged', $question->id);
}
redirect($nexturl->out());
}
} elseif ($fromform = $mform->get_data()) {
/// If we are saving as a copy, break the connection to the old question.
if (!empty($fromform->makecopy)) {
$question->id = 0;
$question->hidden = 0; // Copies should not be hidden
}
/// Process the combination of usecurrentcat, categorymoveto and category form
/// fields, so the save_question method only has to consider $fromform->category
if (!empty($fromform->usecurrentcat)) {
// $fromform->category is the right category to save in.
} else {
if (!empty($fromform->categorymoveto)) {
$fromform->category = $fromform->categorymoveto;
} else {
// $fromform->category is the right category to save in.
}
}
/// If we are moving a question, check we have permission to move it from
/// whence it came. (Where we are moving to is validated by the form.)
list($newcatid) = explode(',', $fromform->category);
if (!empty($question->id) && $newcatid != $question->category) {
question_require_capability_on($question, 'move');
}
/// Ensure we redirect back to the category the question is being saved into.
$returnurl = new moodle_url($returnurl);
$returnurl->param('category', $fromform->category);
// TODO: it is sloppy to pass arounf full URLs through page parameters and some servers do not like that
$returnurl = $returnurl->out(false);
/// Call the appropriate method.
if ($movecontext) {
list($tocatid, $tocontextid) = explode(',', $fromform->categorymoveto);
$tocontext = get_context_instance_by_id($tocontextid);
require_capability('moodle/question:add', $tocontext);
if (get_filesdir_from_context($categorycontext) != get_filesdir_from_context($tocontext)){
$movecontexturl = new moodle_url('/question/contextmoveq.php',
array('returnurl' => $returnurl,
'ids'=>$question->id,
'tocatid'=> $tocatid));
if ($cmid){
$movecontexturl->param('cmid', $cmid);
} else {
$movecontexturl->param('courseid', $COURSE->id);
}
redirect($movecontexturl);
}
}
$question = $QTYPES[$question->qtype]->save_question($question, $fromform, $COURSE, $wizardnow, true);
// a wizardpage from multipe pages questiontype like calculated may not allow editing the question tags
if (!empty($CFG->usetags) && isset($fromform->tags)) {
require_once($CFG->dirroot.'/tag/lib.php');
tag_set('question', $question->id, $fromform->tags);
}
if (($QTYPES[$question->qtype]->finished_edit_wizard($fromform)) || $movecontext){
if ($inpopup) {
echo $OUTPUT->notification(get_string('changessaved'), '');
close_window(3);
} else {
$nexturl = new moodle_url($returnurl);
$nexturl->param('lastchanged', $question->id);
if($appendqnumstring) {
$nexturl->params(array($appendqnumstring=>($question->id), "sesskey"=>sesskey(), "cmid"=>$cmid));
}
redirect($nexturl);
}
} else {
$nexturlparams = array('returnurl'=>$returnurl, 'appendqnumstring'=>$appendqnumstring);
if (isset($fromform->nextpageparam) && is_array($fromform->nextpageparam)){
$nexturlparams += $fromform->nextpageparam;//useful for passing data to the next page which is not saved in the database
}
$nexturlparams['id'] = $question->id;
$nexturlparams['wizardnow'] = $fromform->wizard;
$nexturl = new moodle_url('question.php', $nexturlparams);
if ($cmid){
$nexturl->param('cmid', $cmid);
} else {
$nexturl->param('courseid', $COURSE->id);
}
redirect($nexturl);
}
} else {
$streditingquestion = $QTYPES[$question->qtype]->get_heading();
$PAGE->set_title($streditingquestion);
$PAGE->set_heading($COURSE->fullname);
if ($cm !== null) {
$strmodule = get_string('modulename', $cm->modname);
$streditingmodule = get_string('editinga', 'moodle', $strmodule);
$PAGE->navbar->add(get_string('modulenameplural', $cm->modname), new moodle_url('/mod/'.$cm->modname.'/index.php', array('id'=>$cm->course)));
$PAGE->navbar->add(format_string($module->name), new moodle_url('/mod/'.$cm->modname.'/view.php', array('id'=>$cm->id)));
if (stripos($returnurl, "$CFG->wwwroot/mod/{$cm->modname}/view.php")!== 0){
//don't need this link if returnurl returns to view.php
$PAGE->navbar->add($streditingmodule, $returnurl);
}
$PAGE->navbar->add($streditingquestion);
echo $OUTPUT->header();
} else {
$strediting = '<a href="edit.php?courseid='.$COURSE->id.'">'.get_string("editquestions", "quiz").'</a> -> '.$streditingquestion;
$PAGE->navbar->add(get_string('editquestions', "quiz"), $returnurl);
$PAGE->navbar->add($streditingquestion);
echo $OUTPUT->header();
}
// Display a heading, question editing form and possibly some extra content needed for
// for this question type.
$QTYPES[$question->qtype]->display_question_editing_page($mform, $question, $wizardnow);
echo $OUTPUT->footer();
}
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