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404 lines
17 KiB
PHP
404 lines
17 KiB
PHP
<?php // $Id$
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require_once("../../config.php");
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require_once("locallib.php");
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require_login();
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$courseid = optional_param('courseid');
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$quizid = optional_param('quizid');
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$page = optional_param('page', 0);
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$perpage = optional_param('perpage', 20);
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$strquizzes = get_string('modulenameplural', 'quiz');
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$strediting = get_string('editquestions', "quiz");
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if ($modform = data_submitted() and !empty($modform->course)) { // data submitted
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$SESSION->modform = $modform; // Save the form in the current session
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} else if ($quizid) {
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if (! $modform = get_record('quiz', 'id', $quizid)) {
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error("The required quiz doesn't exist");
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}
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$modform->instance = $modform->id;
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$SESSION->modform = $modform; // Save the form in the current session
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$cm = get_coursemodule_from_instance('quiz', $modform->instance);
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add_to_log($cm->course, 'quiz', 'editquestions',
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"view.php?id=$modform->instance",
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"$modform->name", $cm->id);
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} else if ($courseid) { // Page retrieve through "Edit Questions" link - no quiz selected
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$modform->course = $courseid;
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unset($modform->instance);
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$SESSION->modform = $modform; // Save the form in the current session
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add_to_log($courseid, 'quiz', 'editquestions', "index.php?id=$courseid");
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} else {
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if (!isset($SESSION->modform)) {
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// We currently also get here after editing a question by
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// following the edit link on the review page. Perhaps that should be fixed.
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error('');
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}
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// The data is obtained from a $SESSION variable. This is mostly for historic reasons.
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// With the way things work now it would be just as possible to get the data from the database.
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$modform = $SESSION->modform;
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}
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if (! $course = get_record("course", "id", $modform->course)) {
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error("This course doesn't exist");
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}
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require_login($course->id, false);
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if (!isteacheredit($course->id)) {
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error("You can't modify this course!");
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}
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if (isset($modform->instance)
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&& empty($modform->grades)) // Construct an array to hold all the grades.
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{
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$modform->grades = quiz_get_all_question_grades($modform->questions, $modform->instance);
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}
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/// Now, check for commands on this page and modify variables as necessary
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if (isset($_REQUEST['up']) and confirm_sesskey()) { /// Move the given question up a slot
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$questions = explode(",", $modform->questions);
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if ($questions[0] <> $up) {
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foreach ($questions as $key => $question) {
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if ($up == $question) {
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$swap = $questions[$key-1];
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$questions[$key-1] = $question;
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$questions[$key] = $swap;
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break;
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}
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}
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$modform->questions = implode(",", $questions);
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}
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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}
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if (isset($_REQUEST['down']) and confirm_sesskey()) { /// Move the given question down a slot
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$questions = explode(",", $modform->questions);
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if ($questions[count($questions)-1] <> $down) {
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foreach ($questions as $key => $question) {
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if ($down == $question) {
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$swap = $questions[$key+1];
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$questions[$key+1] = $question;
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$questions[$key] = $swap;
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break;
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}
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}
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$modform->questions = implode(",", $questions);
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}
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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}
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if (isset($_REQUEST['addquestion']) and confirm_sesskey()) { /// Add a single question to the current quiz
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// add question to quiz->questions
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$key = $_REQUEST['addquestion'];
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$questions = array();
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if (!empty($modform->questions)) {
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$questions = explode(",", $modform->questions);
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}
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if (!in_array($key, $questions)) {
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$questions[] = $key;
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}
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$modform->questions = implode(",", $questions);
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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// update question grades
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$questionrecord = get_record("quiz_questions", "id", $key);
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if (!empty($questionrecord->defaultgrade)) {
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$modform->grades[$key] = $questionrecord->defaultgrade;
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} else if ($questionrecord->qtype == DESCRIPTION){
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$modform->grades[$key] = 0;
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} else {
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$modform->grades[$key] = 1;
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}
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quiz_questiongrades_update($modform->grades, $modform->instance);
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}
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if (isset($_REQUEST['add']) and confirm_sesskey()) { /// Add selected questions to the current quiz
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$rawquestions = $_POST;
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if (!empty($modform->questions)) {
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$questions = explode(",", $modform->questions);
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}
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foreach ($rawquestions as $key => $value) { // Parse input for question ids
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if (substr($key, 0, 1) == "q") {
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$key = substr($key,1);
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if (!empty($questions)) {
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foreach ($questions as $question) {
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if ($question == $key) {
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continue 2;
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}
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}
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}
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$questions[] = $key;
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$questionrecord = get_record("quiz_questions", "id", $key);
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if (!empty($questionrecord->defaultgrade)) {
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$modform->grades[$key] = $questionrecord->defaultgrade;
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} else if ($questionrecord->qtype == DESCRIPTION){
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$modform->grades[$key] = 0;
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} else {
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$modform->grades[$key] = 1;
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}
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}
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}
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if (!empty($questions)) {
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$modform->questions = implode(",", $questions);
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} else {
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$modform->questions = "";
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}
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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quiz_questiongrades_update($modform->grades, $modform->instance);
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}
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if (isset($_REQUEST['move']) and confirm_sesskey()) { /// Move selected questions to new category
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if (!$tocategory = get_record('quiz_categories', 'id', $_REQUEST['category'])) {
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error('Invalid category');
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}
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if (!isteacheredit($tocategory->course)) {
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error(get_string('categorynoedit', 'quiz', $tocategory->name), 'edit.php');
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}
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$rawquestions = $_POST;
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foreach ($rawquestions as $key => $value) { // Parse input for question ids
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if (substr($key, 0, 1) == "q") {
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$key = substr($key,1);
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if (!set_field('quiz_questions', 'category', $tocategory->id, 'id', $key)) {
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error('Could not update category field');
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}
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}
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}
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}
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if (isset($_REQUEST['delete']) and confirm_sesskey()) { /// Remove a question from the quiz
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$questions = explode(",", $modform->questions);
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foreach ($questions as $key => $question) {
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if ($question == $delete) {
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unset($questions[$key]);
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unset($modform->grades[$question]);
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// Delete all responses associated with all attempts for this question in the quiz.
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if ($attempts = get_records('quiz_attempts', 'quiz', $modform->instance)) {
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foreach ($attempts as $attempt) {
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if (!delete_records('quiz_responses', 'question', $question, 'attempt', $attempt->id)) {
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error('Could not delete all responses for this question');
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}
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}
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}
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// Delete question from quiz_question_grades table
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if (!delete_records('quiz_question_grades', 'quiz', $modform->instance, 'question', $question)) {
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error('Could not delete the question from this quiz');
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}
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}
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}
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$modform->questions = implode(",", $questions);
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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}
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if (isset($_REQUEST['deleteselected'])) { // delete selected questions from the category
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if (isset($confirm) and confirm_sesskey()) { // teacher has already confirmed the action
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if ($confirm == md5($deleteselected)) {
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if ($questionlist = explode(',', $deleteselected)) {
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// for each question either hide it if it is in use or delete it
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foreach ($questionlist as $questionid) {
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if (record_exists('quiz_responses', 'question', $questionid) or
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record_exists('quiz_responses', 'originalquestion', $questionid) or
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record_exists('quiz_question_grades', 'question', $questionid)) {
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if (!set_field('quiz_questions', 'hidden', 1, 'id', $questionid)) {
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error('Was not able to hide question');
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}
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} else {
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if (!delete_records("quiz_questions", "id", $questionid)) {
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error("An error occurred trying to delete question (id $questionid)");
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}
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}
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}
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}
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redirect("edit.php");
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} else {
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error("Confirmation string was incorrect");
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}
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} else { // teacher still has to confirm
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// make a list of all the questions that are selected
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$rawquestions = $_POST;
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$questionlist = ''; // comma separated list of ids of questions to be deleted
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$questionnames = ''; // string with names of questions separated by <br /> with
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// an asterix in front of those that are in use
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$inuse = false; // set to true if at least one of the questions is in use
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foreach ($rawquestions as $key => $value) { // Parse input for question ids
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if (substr($key, 0, 1) == "q") {
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$key = substr($key,1);
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$questionlist .= $key.',';
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if (record_exists('quiz_responses', 'question', $key) or
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record_exists('quiz_responses', 'originalquestion', $key) or
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record_exists('quiz_question_grades', 'question', $key)) {
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$questionnames .= '* ';
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$inuse = true;
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}
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$questionnames .= get_field('quiz_questions', 'name', 'id', $key).'<br />';
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}
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}
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if (!$questionlist) { // no questions were selected
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redirect('edit.php');
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}
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$questionlist = rtrim($questionlist, ',');
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// Add an explanation about questions in use
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if ($inuse) {
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$questionnames .= get_string('questionsinuse', 'quiz');
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}
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print_header_simple($strediting, '',
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"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
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" -> $strediting");
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notice_yesno(get_string("deletequestionscheck", "quiz", $questionnames),
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"edit.php?sesskey=$USER->sesskey&deleteselected=$questionlist&confirm=".md5($questionlist), "edit.php");
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print_footer($course);
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exit;
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}
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}
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if (isset($_REQUEST['setgrades']) and confirm_sesskey()) { /// The grades have been updated, so update our internal list
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$rawgrades = $_POST;
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unset($modform->grades);
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foreach ($rawgrades as $key => $value) { // Parse input for question -> grades
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if (substr($key, 0, 1) == "q") {
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$key = substr($key,1);
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$modform->grades[$key] = $value;
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}
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}
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if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
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error('Could not save question list');
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}
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quiz_questiongrades_update($modform->grades, $modform->instance);
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}
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if (isset($_REQUEST['cat'])) { /// coming from category selection drop-down menu
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$modform->category = $cat;
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}
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if(isset($_REQUEST['displayoptions'])) {
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$modform->recurse = isset($_REQUEST['recurse']) ? 1 : 0;
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$modform->showhidden = isset($_REQUEST['showhidden']);
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}
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/// all commands have been dealt with, now print the page
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if (empty($modform->category) or !record_exists('quiz_categories', 'id', $modform->category)) {
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$category = quiz_get_default_category($course->id);
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$modform->category = $category->id;
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}
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if (!isset($modform->recurse)) {
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$modform->recurse = 1;
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}
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if (!isset($modform->showhidden)) {
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$modform->showhidden = false;
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}
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$SESSION->modform = $modform;
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// Print basic page layout.
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if (isset($modform->instance) and record_exists_sql("SELECT * FROM {$CFG->prefix}quiz_attempts WHERE quiz = '$modform->instance' AND NOT (userid = '$USER->id') LIMIT 1")){
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// one column layout with table of questions used in this quiz
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print_header_simple($strediting, '',
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"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
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" -> <a href=\"view.php?q=$modform->instance\">$modform->name</a>".
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" -> $strediting");
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print_simple_box_start("center");
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print_heading($modform->name);
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$attemptcount = count_records_select("quiz_attempts", "quiz = '$modform->instance' AND timefinish > 0");
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$strviewallanswers = get_string("viewallanswers","quiz",$attemptcount);
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$strattemptsexist = get_string("attemptsexist","quiz");
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$usercount = count_records("quiz_grades", "quiz", "$modform->instance");
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$strusers = get_string("users");
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if (! $cm = get_coursemodule_from_instance("quiz", $modform->instance, $course->id)) {
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error("Course Module ID was incorrect");
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}
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notify("$strattemptsexist<br /><a href=\"report.php?id=$cm->id\">$strviewallanswers ($usercount $strusers)</a>");
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$sumgrades = quiz_print_question_list($modform->questions, $modform->grades, false, $modform->instance);
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if (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $modform->instance)) {
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error('Failed to set sumgrades');
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}
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print_simple_box_end();
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print_continue('view.php?q='.$modform->instance);
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print_footer($course);
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exit;
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}
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if (!isset($modform->instance)) {
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// one column layout for non-quiz-specific editing page
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print_header_simple($strediting, '',
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"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
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" -> $strediting");
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echo '<table align="center" border="0" cellpadding="2" cellspacing="0">';
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echo '<tr><td valign="top">';
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} else {
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// two column layout with quiz info in left column
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print_header_simple($strediting, '',
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"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
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" -> <a href=\"view.php?q=$modform->instance\">$modform->name</a>".
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" -> $strediting");
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echo '<table border="0" width="100%" cellpadding="2" cellspacing="0">';
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echo '<tr><td width="50%" valign="top">';
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print_simple_box_start("center", "100%");
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print_heading($modform->name);
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$sumgrades = quiz_print_question_list($modform->questions, $modform->grades, true, $modform->instance);
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if (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $modform->instance)) {
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error('Failed to set sumgrades');
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}
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print_simple_box_end();
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print_continue('view.php?q='.$modform->instance);
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echo '</td><td valign="top" width="50%">';
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}
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// non-quiz-specific column
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print_simple_box_start("center", "100%");
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// starts with category selection form
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quiz_print_category_form($course, $modform->category, $modform->recurse, $modform->showhidden);
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print_simple_box_end();
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print_spacer(5,1);
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// continues with list of questions
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print_simple_box_start("center", "100%");
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quiz_print_cat_question_list($course, $modform->category,
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isset($modform->instance), $modform->recurse, $page, $perpage, $modform->showhidden);
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print_simple_box_end();
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if (!isset($modform->instance)) {
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print_continue("index.php?id=$modform->course");
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} else {
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print_continue('view.php?q='.$modform->instance);
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}
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echo '</td></tr>';
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echo '</table>';
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print_footer($course);
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?>
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