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1073 lines
38 KiB
PHP
1073 lines
38 KiB
PHP
<?php // $Id$
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/**
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* Library of functions for the quiz module.
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*
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* This contains functions that are called also from outside the quiz module
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* Functions that are only called by the quiz module itself are in {@link locallib.php}
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* @author Martin Dougiamas and many others.
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package quiz
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*/
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require_once($CFG->libdir.'/pagelib.php');
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require_once($CFG->libdir.'/questionlib.php');
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/// CONSTANTS ///////////////////////////////////////////////////////////////////
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/**#@+
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* The different review options are stored in the bits of $quiz->review
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* These constants help to extract the options
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*
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* This is more of a mess than you might think necessary, because originally
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* it was though that 3x6 bits were enough, but then they ran out. PHP integers
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* are only reliably 32 bits signed, so the simplest solution was then to
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* add 4x3 more bits.
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*/
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/**
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* The first 6 + 4 bits refer to the time immediately after the attempt
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*/
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define('QUIZ_REVIEW_IMMEDIATELY', 0x3c003f);
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/**
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* the next 6 + 4 bits refer to the time after the attempt but while the quiz is open
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*/
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define('QUIZ_REVIEW_OPEN', 0x3c00fc0);
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/**
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* the final 6 + 4 bits refer to the time after the quiz closes
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*/
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define('QUIZ_REVIEW_CLOSED', 0x3c03f000);
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// within each group of 6 bits we determine what should be shown
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define('QUIZ_REVIEW_RESPONSES', 1*0x1041); // Show responses
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define('QUIZ_REVIEW_SCORES', 2*0x1041); // Show scores
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define('QUIZ_REVIEW_FEEDBACK', 4*0x1041); // Show question feedback
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define('QUIZ_REVIEW_ANSWERS', 8*0x1041); // Show correct answers
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// Some handling of worked solutions is already in the code but not yet fully supported
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// and not switched on in the user interface.
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define('QUIZ_REVIEW_SOLUTIONS', 16*0x1041); // Show solutions
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define('QUIZ_REVIEW_GENERALFEEDBACK',32*0x1041); // Show question general feedback
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define('QUIZ_REVIEW_OVERALLFEEDBACK', 1*0x4440000); // Show quiz overall feedback
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// Multipliers 2*0x4440000, 4*0x4440000 and 8*0x4440000 are still available
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/**#@-*/
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/**
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* If start and end date for the quiz are more than this many seconds apart
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* they will be represented by two separate events in the calendar
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*/
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define("QUIZ_MAX_EVENT_LENGTH", 5*24*60*60); // 5 days maximum
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/// FUNCTIONS ///////////////////////////////////////////////////////////////////
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/**
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* Given an object containing all the necessary data,
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* (defined by the form in mod.html) this function
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* will create a new instance and return the id number
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* of the new instance.
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*
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* @param object $quiz the data that came from the form.
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* @return mixed the id of the new instance on success,
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* false or a string error message on failure.
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*/
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function quiz_add_instance($quiz) {
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// Process the options from the form.
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$quiz->created = time();
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$quiz->questions = '';
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$result = quiz_process_options($quiz);
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if ($result && is_string($result)) {
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return $result;
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}
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// Try to store it in the database.
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if (!$quiz->id = insert_record("quiz", $quiz)) {
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return false;
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}
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// Do the processing required after an add or an update.
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quiz_after_add_or_update($quiz);
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return $quiz->id;
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}
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/**
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* Given an object containing all the necessary data,
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* (defined by the form in mod.html) this function
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* will update an existing instance with new data.
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*
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* @param object $quiz the data that came from the form.
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* @return mixed true on success, false or a string error message on failure.
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*/
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function quiz_update_instance($quiz) {
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// Process the options from the form.
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$result = quiz_process_options($quiz);
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if ($result && is_string($result)) {
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return $result;
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}
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// Update the database.
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$quiz->id = $quiz->instance;
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if (!update_record("quiz", $quiz)) {
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return false; // some error occurred
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}
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// Do the processing required after an add or an update.
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quiz_after_add_or_update($quiz);
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// Delete any previous preview attempts
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delete_records('quiz_attempts', 'preview', '1', 'quiz', $quiz->id);
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return true;
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}
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function quiz_delete_instance($id) {
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/// Given an ID of an instance of this module,
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/// this function will permanently delete the instance
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/// and any data that depends on it.
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if (! $quiz = get_record("quiz", "id", "$id")) {
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return false;
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}
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$result = true;
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if ($attempts = get_records("quiz_attempts", "quiz", "$quiz->id")) {
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foreach ($attempts as $attempt) {
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// TODO: this should use the delete_attempt($attempt->uniqueid) function in questionlib.php
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if (! delete_records("question_states", "attempt", "$attempt->uniqueid")) {
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$result = false;
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}
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if (! delete_records("question_sessions", "attemptid", "$attempt->uniqueid")) {
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$result = false;
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}
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}
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}
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$tables_to_purge = array(
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'quiz_attempts' => 'quiz',
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'quiz_grades' => 'quiz',
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'quiz_question_instances' => 'quiz',
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'quiz_grades' => 'quiz',
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'quiz_feedback' => 'quizid',
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'quiz' => 'id'
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);
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foreach ($tables_to_purge as $table => $keyfield) {
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if (!delete_records($table, $keyfield, $quiz->id)) {
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$result = false;
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}
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}
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$pagetypes = page_import_types('mod/quiz/');
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foreach($pagetypes as $pagetype) {
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if(!delete_records('block_instance', 'pageid', $quiz->id, 'pagetype', $pagetype)) {
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$result = false;
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}
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}
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if ($events = get_records_select('event', "modulename = 'quiz' and instance = '$quiz->id'")) {
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foreach($events as $event) {
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delete_event($event->id);
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}
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}
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quiz_grade_item_delete($quiz);
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return $result;
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}
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function quiz_user_outline($course, $user, $mod, $quiz) {
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/// Return a small object with summary information about what a
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/// user has done with a given particular instance of this module
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/// Used for user activity reports.
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/// $return->time = the time they did it
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/// $return->info = a short text description
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if ($grade = get_record('quiz_grades', 'userid', $user->id, 'quiz', $quiz->id)) {
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$result = new stdClass;
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if ((float)$grade->grade) {
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$result->info = get_string('grade').': '.round($grade->grade, $quiz->decimalpoints);
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}
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$result->time = $grade->timemodified;
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return $result;
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}
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return NULL;
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}
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function quiz_user_complete($course, $user, $mod, $quiz) {
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/// Print a detailed representation of what a user has done with
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/// a given particular instance of this module, for user activity reports.
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if ($attempts = get_records_select('quiz_attempts', "userid='$user->id' AND quiz='$quiz->id'", 'attempt ASC')) {
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if ($quiz->grade and $quiz->sumgrades && $grade = get_record('quiz_grades', 'userid', $user->id, 'quiz', $quiz->id)) {
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echo get_string('grade').': '.round($grade->grade, $quiz->decimalpoints).'/'.$quiz->grade.'<br />';
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}
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foreach ($attempts as $attempt) {
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echo get_string('attempt', 'quiz').' '.$attempt->attempt.': ';
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if ($attempt->timefinish == 0) {
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print_string('unfinished');
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} else {
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echo round($attempt->sumgrades, $quiz->decimalpoints).'/'.$quiz->sumgrades;
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}
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echo ' - '.userdate($attempt->timemodified).'<br />';
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}
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} else {
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print_string('noattempts', 'quiz');
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}
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return true;
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}
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function quiz_cron () {
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/// Function to be run periodically according to the moodle cron
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/// This function searches for things that need to be done, such
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/// as sending out mail, toggling flags etc ...
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global $CFG;
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return true;
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}
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/**
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* @param integer $quizid the quiz id.
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* @param integer $userid the userid.
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* @param string $status 'all', 'finished' or 'unfinished' to control
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* @return an array of all the user's attempts at this quiz. Returns an empty array if there are none.
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*/
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function quiz_get_user_attempts($quizid, $userid, $status = 'finished', $includepreviews = false) {
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$status_condition = array(
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'all' => '',
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'finished' => ' AND timefinish > 0',
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'unfinished' => ' AND timefinish = 0'
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);
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$previewclause = '';
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if (!$includepreviews) {
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$previewclause = ' AND preview = 0';
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}
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if ($attempts = get_records_select('quiz_attempts',
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"quiz = '$quizid' AND userid = '$userid'" . $previewclause . $status_condition[$status],
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'attempt ASC')) {
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return $attempts;
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} else {
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return array();
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}
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}
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/**
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* Return grade for given user or all users.
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*
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* @param int $quizid id of quiz
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* @param int $userid optional user id, 0 means all users
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* @return array array of grades, false if none
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*/
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function quiz_get_user_grades($quiz, $userid=0) {
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global $CFG;
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$user = $userid ? "AND u.id = $userid" : "";
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$sql = "SELECT u.id, u.id AS userid, g.grade AS rawgrade
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FROM {$CFG->prefix}user u, {$CFG->prefix}quiz_grades g
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WHERE u.id = g.userid AND g.quiz = $quiz->id
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$user";
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return get_records_sql($sql);
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}
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/**
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* Update grades in central gradebook
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*
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* @param object $quiz null means all quizs
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* @param int $userid specific user only, 0 mean all
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*/
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function quiz_update_grades($quiz=null, $userid=0, $nullifnone=true) {
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global $CFG;
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if (!function_exists('grade_update')) { //workaround for buggy PHP versions
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require_once($CFG->libdir.'/gradelib.php');
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}
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if ($quiz != null) {
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quiz_grade_item_update($quiz); // Recreate it if necessary
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if ($grades = quiz_get_user_grades($quiz, $userid)) {
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grade_update('mod/quiz', $quiz->course, 'mod', 'quiz', $quiz->id, 0, $grades);
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} else if ($userid and $nullifnone) {
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$grade = new object();
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$grade->userid = $userid;
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$grade->rawgrade = NULL;
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grade_update('mod/quiz', $quiz->course, 'mod', 'quiz', $quiz->id, 0, $grade);
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}
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} else {
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$sql = "SELECT a.*, cm.idnumber as cmidnumber, a.course as courseid
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FROM {$CFG->prefix}quiz a, {$CFG->prefix}course_modules cm, {$CFG->prefix}modules m
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WHERE m.name='quiz' AND m.id=cm.module AND cm.instance=a.id";
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if ($rs = get_recordset_sql($sql)) {
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while ($quiz = rs_fetch_next_record($rs)) {
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quiz_grade_item_update($quiz);
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if ($quiz->grade != 0) {
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quiz_update_grades($quiz, 0, false);
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}
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}
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rs_close($rs);
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}
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}
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}
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/**
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* Create grade item for given quiz
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*
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* @param object $quiz object with extra cmidnumber
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* @return int 0 if ok, error code otherwise
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*/
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function quiz_grade_item_update($quiz) {
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global $CFG;
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if (!function_exists('grade_update')) { //workaround for buggy PHP versions
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require_once($CFG->libdir.'/gradelib.php');
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}
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if (array_key_exists('cmidnumber', $quiz)) { //it may not be always present
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$params = array('itemname'=>$quiz->name, 'idnumber'=>$quiz->cmidnumber);
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} else {
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$params = array('itemname'=>$quiz->name);
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}
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if ($quiz->grade > 0) {
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$params['gradetype'] = GRADE_TYPE_VALUE;
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$params['grademax'] = $quiz->grade;
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$params['grademin'] = 0;
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} else {
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$params['gradetype'] = GRADE_TYPE_NONE;
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}
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/* description by TJ:
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1/ If the quiz is set to not show scores while the quiz is still open, and is set to show scores after
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the quiz is closed, then create the grade_item with a show-after date that is the quiz close date.
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2/ If the quiz is set to not show scores at either of those times, create the grade_item as hidden.
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3/ If the quiz is set to show scores, create the grade_item visible.
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*/
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if (!($quiz->review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_CLOSED)
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and !($quiz->review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_OPEN)) {
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$params['hidden'] = 1;
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} else if ( ($quiz->review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_CLOSED)
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and !($quiz->review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_OPEN)) {
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if ($quiz->timeclose) {
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$params['hidden'] = $quiz->timeclose;
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} else {
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$params['hidden'] = 1;
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}
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} else {
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// a) both open and closed enabled
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// b) open enabled, closed disabled - we can not "hide after", grades are kept visible even after closing
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$params['hidden'] = 0;
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}
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return grade_update('mod/quiz', $quiz->course, 'mod', 'quiz', $quiz->id, 0, NULL, $params);
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}
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/**
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* Delete grade item for given quiz
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*
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* @param object $quiz object
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* @return object quiz
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*/
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function quiz_grade_item_delete($quiz) {
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global $CFG;
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require_once($CFG->libdir.'/gradelib.php');
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return grade_update('mod/quiz', $quiz->course, 'mod', 'quiz', $quiz->id, 0, NULL, array('deleted'=>1));
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}
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function quiz_get_participants($quizid) {
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/// Returns an array of users who have data in a given quiz
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/// (users with records in quiz_attempts and quiz_question_versions)
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global $CFG;
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//Get users from attempts
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$us_attempts = get_records_sql("SELECT DISTINCT u.id, u.id
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FROM {$CFG->prefix}user u,
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{$CFG->prefix}quiz_attempts a
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WHERE a.quiz = '$quizid' and
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u.id = a.userid");
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//Get users from question_versions
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$us_versions = get_records_sql("SELECT DISTINCT u.id, u.id
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FROM {$CFG->prefix}user u,
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{$CFG->prefix}quiz_question_versions v
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WHERE v.quiz = '$quizid' and
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u.id = v.userid");
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//Add us_versions to us_attempts
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if ($us_versions) {
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foreach ($us_versions as $us_version) {
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$us_attempts[$us_version->id] = $us_version;
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}
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}
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//Return us_attempts array (it contains an array of unique users)
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return ($us_attempts);
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}
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function quiz_refresh_events($courseid = 0) {
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// This horrible function only seems to be called from mod/quiz/db/[dbtype].php.
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// This standard function will check all instances of this module
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// and make sure there are up-to-date events created for each of them.
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// If courseid = 0, then every quiz event in the site is checked, else
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// only quiz events belonging to the course specified are checked.
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// This function is used, in its new format, by restore_refresh_events()
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if ($courseid == 0) {
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if (! $quizzes = get_records("quiz")) {
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return true;
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}
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} else {
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if (! $quizzes = get_records("quiz", "course", $courseid)) {
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return true;
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}
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}
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$moduleid = get_field('modules', 'id', 'name', 'quiz');
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foreach ($quizzes as $quiz) {
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$event = NULL;
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$event2 = NULL;
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$event2old = NULL;
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if ($events = get_records_select('event', "modulename = 'quiz' AND instance = '$quiz->id' ORDER BY timestart")) {
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$event = array_shift($events);
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if (!empty($events)) {
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$event2old = array_shift($events);
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if (!empty($events)) {
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foreach ($events as $badevent) {
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delete_records('event', 'id', $badevent->id);
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}
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}
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}
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}
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$event->name = addslashes($quiz->name);
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$event->description = addslashes($quiz->intro);
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$event->courseid = $quiz->course;
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$event->groupid = 0;
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$event->userid = 0;
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$event->modulename = 'quiz';
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$event->instance = $quiz->id;
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$event->visible = instance_is_visible('quiz', $quiz);
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$event->timestart = $quiz->timeopen;
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$event->eventtype = 'open';
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$event->timeduration = ($quiz->timeclose - $quiz->timeopen);
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if ($event->timeduration > QUIZ_MAX_EVENT_LENGTH) { /// Set up two events
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$event2 = $event;
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$event->name = addslashes($quiz->name).' ('.get_string('quizopens', 'quiz').')';
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$event->timeduration = 0;
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$event2->name = addslashes($quiz->name).' ('.get_string('quizcloses', 'quiz').')';
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$event2->timestart = $quiz->timeclose;
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$event2->eventtype = 'close';
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$event2->timeduration = 0;
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if (empty($event2old->id)) {
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unset($event2->id);
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add_event($event2);
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} else {
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$event2->id = $event2old->id;
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update_event($event2);
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}
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} else if (!empty($event2old->id)) {
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|
delete_event($event2old->id);
|
|
}
|
|
|
|
if (empty($event->id)) {
|
|
if (!empty($event->timestart)) {
|
|
add_event($event);
|
|
}
|
|
} else {
|
|
update_event($event);
|
|
}
|
|
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
function quiz_get_recent_mod_activity(&$activities, &$index, $sincetime, $courseid, $quiz="0", $user="", $groupid="") {
|
|
// Returns all quizzes since a given time. If quiz is specified then
|
|
// this restricts the results
|
|
|
|
global $CFG;
|
|
|
|
if ($quiz) {
|
|
$quizselect = " AND cm.id = '$quiz'";
|
|
} else {
|
|
$quizselect = "";
|
|
}
|
|
if ($user) {
|
|
$userselect = " AND u.id = '$user'";
|
|
} else {
|
|
$userselect = "";
|
|
}
|
|
|
|
$quizzes = get_records_sql("SELECT qa.*, q.name, u.firstname, u.lastname, u.picture,
|
|
q.course, q.sumgrades as maxgrade, cm.instance, cm.section, cm.id as cmid
|
|
FROM {$CFG->prefix}quiz_attempts qa,
|
|
{$CFG->prefix}quiz q,
|
|
{$CFG->prefix}user u,
|
|
{$CFG->prefix}course_modules cm
|
|
WHERE qa.timefinish > '$sincetime'
|
|
AND qa.userid = u.id $userselect
|
|
AND qa.quiz = q.id $quizselect
|
|
AND cm.instance = q.id
|
|
AND cm.course = '$courseid'
|
|
AND q.course = cm.course
|
|
ORDER BY qa.timefinish ASC");
|
|
|
|
if (empty($quizzes))
|
|
return;
|
|
|
|
foreach ($quizzes as $quiz) {
|
|
if (empty($groupid) || groups_is_member($groupid, $quiz->userid)) {
|
|
|
|
$tmpactivity = new Object;
|
|
|
|
$tmpactivity->type = "quiz";
|
|
$tmpactivity->defaultindex = $index;
|
|
$tmpactivity->instance = $quiz->quiz;
|
|
$tmpactivity->cmid = $quiz->cmid;
|
|
|
|
$tmpactivity->name = $quiz->name;
|
|
$tmpactivity->section = $quiz->section;
|
|
|
|
$tmpactivity->content->attemptid = $quiz->id;
|
|
$tmpactivity->content->sumgrades = $quiz->sumgrades;
|
|
$tmpactivity->content->maxgrade = $quiz->maxgrade;
|
|
$tmpactivity->content->attempt = $quiz->attempt;
|
|
|
|
$tmpactivity->user->userid = $quiz->userid;
|
|
$tmpactivity->user->fullname = fullname($quiz);
|
|
$tmpactivity->user->picture = $quiz->picture;
|
|
|
|
$tmpactivity->timestamp = $quiz->timefinish;
|
|
|
|
$activities[] = $tmpactivity;
|
|
|
|
$index++;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
function quiz_print_recent_mod_activity($activity, $course, $detail=false) {
|
|
global $CFG;
|
|
|
|
echo '<table border="0" cellpadding="3" cellspacing="0">';
|
|
|
|
echo "<tr><td class=\"forumpostpicture\" width=\"35\" valign=\"top\">";
|
|
print_user_picture($activity->user->userid, $course, $activity->user->picture);
|
|
echo "</td><td style=\"width:100%;\"><font size=\"2\">";
|
|
|
|
if ($detail) {
|
|
echo "<img src=\"$CFG->modpixpath/$activity->type/icon.gif\" ".
|
|
"class=\"icon\" alt=\"$activity->type\" /> ";
|
|
echo "<a href=\"$CFG->wwwroot/mod/quiz/view.php?id=" . $activity->instance . "\">"
|
|
. format_string($activity->name,true) . "</a> - ";
|
|
|
|
}
|
|
|
|
if (has_capability('mod/quiz:grade', get_context_instance(CONTEXT_MODULE, $activity->cmid))) {
|
|
$grades = "(" . $activity->content->sumgrades . " / " . $activity->content->maxgrade . ") ";
|
|
echo "<a href=\"$CFG->wwwroot/mod/quiz/review.php?q="
|
|
. $activity->instance . "&attempt="
|
|
. $activity->content->attemptid . "\">" . $grades . "</a> ";
|
|
|
|
echo get_string("attempt", "quiz") . " - " . $activity->content->attempt . "<br />";
|
|
}
|
|
echo "<a href=\"$CFG->wwwroot/user/view.php?id="
|
|
. $activity->user->userid . "&course=$course\">"
|
|
. $activity->user->fullname . "</a> ";
|
|
|
|
echo " - " . userdate($activity->timestamp);
|
|
|
|
echo "</font></td></tr>";
|
|
echo "</table>";
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Pre-process the quiz options form data, making any necessary adjustments.
|
|
* Called by add/update instance in this file, and the save code in admin/module.php.
|
|
*
|
|
* @param object $quiz The variables set on the form.
|
|
*/
|
|
function quiz_process_options(&$quiz) {
|
|
$quiz->timemodified = time();
|
|
|
|
// Quiz open time.
|
|
if (empty($quiz->timeopen)) {
|
|
$quiz->preventlate = 0;
|
|
}
|
|
|
|
// Quiz name.
|
|
if (!empty($quiz->name)) {
|
|
$quiz->name = trim($quiz->name);
|
|
}
|
|
|
|
// Time limit. (Get rid of it if the checkbox was not ticked.)
|
|
if (empty($quiz->timelimitenable)) {
|
|
$quiz->timelimit = 0;
|
|
}
|
|
$quiz->timelimit = round($quiz->timelimit);
|
|
|
|
// Password field - different in form to stop browsers that remember passwords
|
|
// getting confused.
|
|
$quiz->password = $quiz->quizpassword;
|
|
unset($quiz->quizpassword);
|
|
|
|
// Quiz feedback
|
|
if (isset($quiz->feedbacktext)) {
|
|
// Clean up the boundary text.
|
|
for ($i = 0; $i < count($quiz->feedbacktext); $i += 1) {
|
|
if (empty($quiz->feedbacktext[$i])) {
|
|
$quiz->feedbacktext[$i] = '';
|
|
} else {
|
|
$quiz->feedbacktext[$i] = trim($quiz->feedbacktext[$i]);
|
|
}
|
|
}
|
|
|
|
// Check the boundary value is a number or a percentage, and in range.
|
|
$i = 0;
|
|
while (!empty($quiz->feedbackboundaries[$i])) {
|
|
$boundary = trim($quiz->feedbackboundaries[$i]);
|
|
if (!is_numeric($boundary)) {
|
|
if (strlen($boundary) > 0 && $boundary[strlen($boundary) - 1] == '%') {
|
|
$boundary = trim(substr($boundary, 0, -1));
|
|
if (is_numeric($boundary)) {
|
|
$boundary = $boundary * $quiz->grade / 100.0;
|
|
} else {
|
|
return get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
|
|
}
|
|
}
|
|
}
|
|
if ($boundary <= 0 || $boundary >= $quiz->grade) {
|
|
return get_string('feedbackerrorboundaryoutofrange', 'quiz', $i + 1);
|
|
}
|
|
if ($i > 0 && $boundary >= $quiz->feedbackboundaries[$i - 1]) {
|
|
return get_string('feedbackerrororder', 'quiz', $i + 1);
|
|
}
|
|
$quiz->feedbackboundaries[$i] = $boundary;
|
|
$i += 1;
|
|
}
|
|
$numboundaries = $i;
|
|
|
|
// Check there is nothing in the remaining unused fields.
|
|
for ($i = $numboundaries; $i < count($quiz->feedbackboundaries); $i += 1) {
|
|
if (!empty($quiz->feedbackboundaries[$i]) && trim($quiz->feedbackboundaries[$i]) != '') {
|
|
return get_string('feedbackerrorjunkinboundary', 'quiz', $i + 1);
|
|
}
|
|
}
|
|
for ($i = $numboundaries + 1; $i < count($quiz->feedbacktext); $i += 1) {
|
|
if (!empty($quiz->feedbacktext[$i]) && trim($quiz->feedbacktext[$i]) != '') {
|
|
return get_string('feedbackerrorjunkinfeedback', 'quiz', $i + 1);
|
|
}
|
|
}
|
|
$quiz->feedbackboundaries[-1] = $quiz->grade + 1; // Needs to be bigger than $quiz->grade because of '<' test in quiz_feedback_for_grade().
|
|
$quiz->feedbackboundaries[$numboundaries] = 0;
|
|
$quiz->feedbackboundarycount = $numboundaries;
|
|
}
|
|
|
|
// Settings that get combined to go into the optionflags column.
|
|
$quiz->optionflags = 0;
|
|
if (!empty($quiz->adaptive)) {
|
|
$quiz->optionflags |= QUESTION_ADAPTIVE;
|
|
}
|
|
|
|
// Settings that get combined to go into the review column.
|
|
$review = 0;
|
|
if (isset($quiz->responsesimmediately)) {
|
|
$review += (QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->responsesimmediately);
|
|
}
|
|
if (isset($quiz->responsesopen)) {
|
|
$review += (QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->responsesopen);
|
|
}
|
|
if (isset($quiz->responsesclosed)) {
|
|
$review += (QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->responsesclosed);
|
|
}
|
|
|
|
if (isset($quiz->scoreimmediately)) {
|
|
$review += (QUIZ_REVIEW_SCORES & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->scoreimmediately);
|
|
}
|
|
if (isset($quiz->scoreopen)) {
|
|
$review += (QUIZ_REVIEW_SCORES & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->scoreopen);
|
|
}
|
|
if (isset($quiz->scoreclosed)) {
|
|
$review += (QUIZ_REVIEW_SCORES & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->scoreclosed);
|
|
}
|
|
|
|
if (isset($quiz->feedbackimmediately)) {
|
|
$review += (QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->feedbackimmediately);
|
|
}
|
|
if (isset($quiz->feedbackopen)) {
|
|
$review += (QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->feedbackopen);
|
|
}
|
|
if (isset($quiz->feedbackclosed)) {
|
|
$review += (QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->feedbackclosed);
|
|
}
|
|
|
|
if (isset($quiz->answersimmediately)) {
|
|
$review += (QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->answersimmediately);
|
|
}
|
|
if (isset($quiz->answersopen)) {
|
|
$review += (QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->answersopen);
|
|
}
|
|
if (isset($quiz->answersclosed)) {
|
|
$review += (QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->answersclosed);
|
|
}
|
|
|
|
if (isset($quiz->solutionsimmediately)) {
|
|
$review += (QUIZ_REVIEW_SOLUTIONS & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->solutionsimmediately);
|
|
}
|
|
if (isset($quiz->solutionsopen)) {
|
|
$review += (QUIZ_REVIEW_SOLUTIONS & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->solutionsopen);
|
|
}
|
|
if (isset($quiz->solutionsclosed)) {
|
|
$review += (QUIZ_REVIEW_SOLUTIONS & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->solutionsclosed);
|
|
}
|
|
|
|
if (isset($quiz->generalfeedbackimmediately)) {
|
|
$review += (QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->generalfeedbackimmediately);
|
|
}
|
|
if (isset($quiz->generalfeedbackopen)) {
|
|
$review += (QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->generalfeedbackopen);
|
|
}
|
|
if (isset($quiz->generalfeedbackclosed)) {
|
|
$review += (QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->generalfeedbackclosed);
|
|
}
|
|
|
|
if (isset($quiz->overallfeedbackimmediately)) {
|
|
$review += (QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
|
|
unset($quiz->overallfeedbackimmediately);
|
|
}
|
|
if (isset($quiz->overallfeedbackopen)) {
|
|
$review += (QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_OPEN);
|
|
unset($quiz->overallfeedbackopen);
|
|
}
|
|
if (isset($quiz->overallfeedbackclosed)) {
|
|
$review += (QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_CLOSED);
|
|
unset($quiz->overallfeedbackclosed);
|
|
}
|
|
|
|
$quiz->review = $review;
|
|
}
|
|
|
|
/**
|
|
* This function is called at the end of quiz_add_instance
|
|
* and quiz_update_instance, to do the common processing.
|
|
*
|
|
* @param object $quiz the quiz object.
|
|
*/
|
|
function quiz_after_add_or_update($quiz) {
|
|
|
|
// Save the feedback
|
|
delete_records('quiz_feedback', 'quizid', $quiz->id);
|
|
|
|
for ($i = 0; $i <= $quiz->feedbackboundarycount; $i += 1) {
|
|
$feedback = new stdClass;
|
|
$feedback->quizid = $quiz->id;
|
|
$feedback->feedbacktext = $quiz->feedbacktext[$i];
|
|
$feedback->mingrade = $quiz->feedbackboundaries[$i];
|
|
$feedback->maxgrade = $quiz->feedbackboundaries[$i - 1];
|
|
if (!insert_record('quiz_feedback', $feedback, false)) {
|
|
return "Could not save quiz feedback.";
|
|
}
|
|
}
|
|
|
|
|
|
// Update the events relating to this quiz.
|
|
// This is slightly inefficient, deleting the old events and creating new ones. However,
|
|
// there are at most two events, and this keeps the code simpler.
|
|
if ($events = get_records_select('event', "modulename = 'quiz' and instance = '$quiz->id'")) {
|
|
foreach($events as $event) {
|
|
delete_event($event->id);
|
|
}
|
|
}
|
|
|
|
$event = new stdClass;
|
|
$event->description = $quiz->intro;
|
|
$event->courseid = $quiz->course;
|
|
$event->groupid = 0;
|
|
$event->userid = 0;
|
|
$event->modulename = 'quiz';
|
|
$event->instance = $quiz->id;
|
|
$event->timestart = $quiz->timeopen;
|
|
$event->timeduration = $quiz->timeclose - $quiz->timeopen;
|
|
$event->visible = instance_is_visible('quiz', $quiz);
|
|
$event->eventtype = 'open';
|
|
|
|
if ($quiz->timeclose and $quiz->timeopen and $event->timeduration <= QUIZ_MAX_EVENT_LENGTH) {
|
|
// Single event for the whole quiz.
|
|
$event->name = $quiz->name;
|
|
add_event($event);
|
|
} else {
|
|
// Separate start and end events.
|
|
$event->timeduration = 0;
|
|
if ($quiz->timeopen) {
|
|
$event->name = $quiz->name.' ('.get_string('quizopens', 'quiz').')';
|
|
add_event($event);
|
|
unset($event->id); // So we can use the same object for the close event.
|
|
}
|
|
if ($quiz->timeclose) {
|
|
$event->name = $quiz->name.' ('.get_string('quizcloses', 'quiz').')';
|
|
$event->timestart = $quiz->timeclose;
|
|
$event->eventtype = 'close';
|
|
add_event($event);
|
|
}
|
|
}
|
|
|
|
//update related grade item
|
|
quiz_grade_item_update(stripslashes_recursive($quiz));
|
|
}
|
|
|
|
function quiz_get_view_actions() {
|
|
return array('view','view all','report');
|
|
}
|
|
|
|
function quiz_get_post_actions() {
|
|
return array('attempt','editquestions','review','submit');
|
|
}
|
|
|
|
/**
|
|
* Returns an array of names of quizzes that use this question
|
|
*
|
|
* @param object $questionid
|
|
* @return array of strings
|
|
*/
|
|
function quiz_question_list_instances($questionid) {
|
|
global $CFG;
|
|
|
|
// TODO: we should also consider other questions that are used by
|
|
// random questions in this quiz, but that is very hard.
|
|
|
|
$sql = "SELECT q.id, q.name
|
|
FROM {$CFG->prefix}quiz q
|
|
INNER JOIN
|
|
{$CFG->prefix}quiz_question_instances qqi
|
|
ON q.id = qqi.quiz
|
|
WHERE qqi.question = '$questionid'";
|
|
|
|
if ($instances = get_records_sql_menu($sql)) {
|
|
return $instances;
|
|
}
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Implementation of the function for printing the form elements that control
|
|
* whether the course reset functionality affects the quiz.
|
|
* @param $course The course id of the course the user is thinking of resetting.
|
|
*/
|
|
function quiz_reset_course_form($course) {
|
|
echo '<p>';
|
|
print_checkbox('reset_quiz_attempts', 1, true, get_string('removeallquizattempts','quiz'));
|
|
echo '</p>';
|
|
}
|
|
|
|
/**
|
|
* Actual implementation of the rest coures functionality, delete all the
|
|
* quiz attempts for course $data->courseid, if $data->reset_quiz_attempts is
|
|
* set and true.
|
|
*
|
|
* Also, move the quiz open and close dates, if the course start date is changing.
|
|
*
|
|
* @param $data the data submitted from the reset course forum.
|
|
* @param $showfeedback whether to output progress information as the reset
|
|
* progresses.
|
|
*/
|
|
function quiz_delete_userdata($data, $showfeedback=true) {
|
|
global $CFG;
|
|
|
|
/// Delete attempts.
|
|
if (!empty($data->reset_quiz_attempts)) {
|
|
$conditiononquizids = 'quiz IN (SELECT id FROM ' .
|
|
$CFG->prefix . 'quiz q WHERE q.course = ' . $data->courseid . ')';
|
|
|
|
$attemptids = get_records_select('quiz_attempts', $conditiononquizids, '', 'id, uniqueid');
|
|
if ($attemptids) {
|
|
if ($showfeedback) {
|
|
echo '<div class="notifysuccess">', get_string('deletingquestionattempts', 'quiz');
|
|
$divider = ': ';
|
|
}
|
|
foreach ($attemptids as $attemptid) {
|
|
delete_attempt($attemptid->uniqueid);
|
|
if ($showfeedback) {
|
|
echo $divider, $attemptid->uniqueid;
|
|
$divider = ', ';
|
|
}
|
|
}
|
|
if ($showfeedback) {
|
|
echo "</div><br />\n";
|
|
}
|
|
}
|
|
if (delete_records_select('quiz_grades', $conditiononquizids) && $showfeedback) {
|
|
notify(get_string('gradesdeleted','quiz'), 'notifysuccess');
|
|
}
|
|
if (delete_records_select('quiz_attempts', $conditiononquizids) && $showfeedback) {
|
|
notify(get_string('attemptsdeleted','quiz'), 'notifysuccess');
|
|
}
|
|
}
|
|
|
|
/// Update open and close dates
|
|
if (!empty($data->reset_start_date)) {
|
|
/// Work out offset.
|
|
$olddate = get_field('course', 'startdate', 'id', $data->courseid);
|
|
$olddate = usergetmidnight($olddate); // time part of $olddate should be zero
|
|
$newdate = make_timestamp($data->startyear, $data->startmonth, $data->startday);
|
|
$interval = $newdate - $olddate;
|
|
|
|
/// Apply it to quizzes with an open or close date.
|
|
$success = true;
|
|
begin_sql();
|
|
$success = $success && execute_sql(
|
|
"UPDATE {$CFG->prefix}quiz
|
|
SET timeopen = timeopen + $interval
|
|
WHERE course = {$data->courseid} AND timeopen <> 0", false);
|
|
$success = $success && execute_sql(
|
|
"UPDATE {$CFG->prefix}quiz
|
|
SET timeclose = timeclose + $interval
|
|
WHERE course = {$data->courseid} AND timeclose <> 0", false);
|
|
|
|
if ($success) {
|
|
commit_sql();
|
|
if ($showfeedback) {
|
|
notify(get_string('openclosedatesupdated', 'quiz'), 'notifysuccess');
|
|
}
|
|
} else {
|
|
rollback_sql();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks whether the current user is allowed to view a file uploaded in a quiz.
|
|
* Teachers can view any from their courses, students can only view their own.
|
|
*
|
|
* @param int $attemptid int attempt id
|
|
* @param int $questionid int question id
|
|
* @return boolean to indicate access granted or denied
|
|
*/
|
|
function quiz_check_file_access($attemptid, $questionid) {
|
|
global $USER;
|
|
|
|
$attempt = get_record("quiz_attempts", 'id', $attemptid);
|
|
$quiz = get_record("quiz", 'id', $attempt->quiz);
|
|
$context = get_context_instance(CONTEXT_COURSE, $quiz->course);
|
|
|
|
// access granted if the current user submitted this file
|
|
if ($attempt->userid == $USER->id) {
|
|
return true;
|
|
// access granted if the current user has permission to grade quizzes in this course
|
|
} else if (has_capability('mod/quiz:viewreports', $context) || has_capability('mod/quiz:grade', $context)) {
|
|
return true;
|
|
}
|
|
|
|
// otherwise, this user does not have permission
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Prints quiz summaries on MyMoodle Page
|
|
*/
|
|
function quiz_print_overview($courses, &$htmlarray) {
|
|
global $USER, $CFG;
|
|
/// These next 6 Lines are constant in all modules (just change module name)
|
|
if (empty($courses) || !is_array($courses) || count($courses) == 0) {
|
|
return array();
|
|
}
|
|
|
|
if (!$quizs = get_all_instances_in_courses('quiz', $courses)) {
|
|
return;
|
|
}
|
|
|
|
/// Fetch some language strings outside the main loop.
|
|
$strquiz = get_string('modulename', 'quiz');
|
|
$strnoattempts = get_string('noattempts', 'quiz');
|
|
|
|
/// We want to list quizzes that are currently available, and which have a close date.
|
|
/// This is the same as what the lesson does, and the dabate is in MDL-10568.
|
|
$now = date();
|
|
foreach ($quizs as $quiz) {
|
|
if ($quiz->timeclose >= $now && $quiz->timeopen < $now) {
|
|
/// Give a link to the quiz, and the deadline.
|
|
$str = '<div class="quiz overview">' .
|
|
'<div class="name">' . $strquiz . ': <a ' . ($quiz->visible ? '' : ' class="dimmed"') .
|
|
' href="' . $CFG->wwwroot . '/mod/quiz/view.php?id=' . $quiz->coursemodule . '">' .
|
|
$quiz->name . '</a></div>';
|
|
$str .= '<div class="info">' . get_string('quizcloseson', 'quiz', userdate($quiz->timeclose)) . '</div>';
|
|
|
|
/// Now provide more information depending on the uers's role.
|
|
$context = get_context_instance(CONTEXT_MODULE, $quiz->coursemodule);
|
|
if (has_capability('mod/quiz:viewreports', $context)) {
|
|
/// For teacher-like people, show a summary of the number of student attempts.
|
|
$a = new stdClass;
|
|
if ($a->attemptnum = count_records('quiz_attempts', 'quiz', $quiz->id, 'preview', 0)) {
|
|
$a->studentnum = count_records_select('quiz_attempts', "quiz = '$quiz->id' AND preview = '0'", 'COUNT(DISTINCT userid)');
|
|
} else {
|
|
$a->studentnum = 0;
|
|
$a->attemptnum = 0;
|
|
}
|
|
$a->studentstring = $course->students;
|
|
$str .= '<div class="info">' . get_string('numattempts', 'quiz', $a) . '</div>';
|
|
} else if (has_capability('mod/quiz:attempt', $context)){ // Student
|
|
/// For student-like people, tell them how many attempts they have made.
|
|
if (isset($USER->id) && ($attempts = quiz_get_user_attempts($quiz->id, $USER->id))) {
|
|
$numattempts = count($attempts);
|
|
$str .= '<div class="info">' . get_string('numattemptsmade', 'quiz', $numattempts) . '</div>';
|
|
} else {
|
|
$str .= '<div class="info">' . $strnoattempts . '</div>';
|
|
}
|
|
} else {
|
|
/// For ayone else, there is no point listing this quiz, so stop processing.
|
|
continue;
|
|
}
|
|
|
|
/// Add the output for this quiz to the rest.
|
|
$str .= '</div>';
|
|
if (empty($htmlarray[$quiz->course]['quiz'])) {
|
|
$htmlarray[$quiz->course]['quiz'] = $str;
|
|
} else {
|
|
$htmlarray[$quiz->course]['quiz'] .= $str;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
?>
|