mirror of
https://github.com/moodle/moodle.git
synced 2025-02-01 13:28:17 +01:00
400 lines
15 KiB
PHP
400 lines
15 KiB
PHP
<?php
|
|
require_once($CFG->dirroot . '/mod/quiz/lib.php');
|
|
|
|
define('QUIZ_REPORT_DEFAULT_PAGE_SIZE', 30);
|
|
define('QUIZ_REPORT_DEFAULT_GRADING_PAGE_SIZE', 10);
|
|
|
|
define('QUIZ_REPORT_ATTEMPTS_ALL', 0);
|
|
define('QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH_NO', 1);
|
|
define('QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH', 2);
|
|
define('QUIZ_REPORT_ATTEMPTS_ALL_STUDENTS', 3);
|
|
/**
|
|
* Get newest graded state or newest state for a number of attempts. Pass in the
|
|
* uniqueid field from quiz_attempt table not the id. Use question_state_is_graded
|
|
* function to check that the question is actually graded.
|
|
* @param array attemptidssql either an array of attemptids with numerical keys
|
|
* or an object with properties from, where and params.
|
|
* @param boolean idxattemptq true if a multidimensional array should be
|
|
* constructed with keys indexing array first by attempt and then by question
|
|
* id.
|
|
*/
|
|
function quiz_get_newgraded_states($attemptidssql, $idxattemptq = true, $fields='qs.*'){
|
|
global $CFG, $DB;
|
|
if ($attemptidssql && is_array($attemptidssql)){
|
|
list($usql, $params) = $DB->get_in_or_equal($attemptidssql);
|
|
$gradedstatesql = "SELECT $fields FROM " .
|
|
"{question_sessions} qns, " .
|
|
"{question_states} qs " .
|
|
"WHERE qns.attemptid $usql AND " .
|
|
"qns.newest = qs.id";
|
|
$gradedstates = $DB->get_records_sql($gradedstatesql, $params);
|
|
} else if ($attemptidssql && is_object($attemptidssql)){
|
|
$gradedstatesql = "SELECT $fields FROM " .
|
|
$attemptidssql->from.",".
|
|
"{question_sessions} qns, " .
|
|
"{question_states} qs " .
|
|
"WHERE qns.attemptid = qa.uniqueid AND " .
|
|
$attemptidssql->where." AND ".
|
|
"qns.newest = qs.id";
|
|
$gradedstates = $DB->get_records_sql($gradedstatesql, $attemptidssql->params);
|
|
} else {
|
|
return array();
|
|
}
|
|
if ($idxattemptq){
|
|
return quiz_report_index_by_keys($gradedstates, array('attempt', 'question'));
|
|
} else {
|
|
return $gradedstates;
|
|
}
|
|
}
|
|
/**
|
|
* Takes an array of objects and constructs a multidimensional array keyed by
|
|
* the keys it finds on the object.
|
|
* @param array $datum an array of objects with properties on the object
|
|
* including the keys passed as the next param.
|
|
* @param array $keys Array of strings with the names of the properties on the
|
|
* objects in datum that you want to index the multidimensional array by.
|
|
* @param boolean $keysunique If there is not only one object for each
|
|
* combination of keys you are using you should set $keysunique to true.
|
|
* Otherwise all the object will be added to a zero based array. So the array
|
|
* returned will have count($keys) + 1 indexs.
|
|
* @return array multidimensional array properly indexed.
|
|
*/
|
|
function quiz_report_index_by_keys($datum, $keys, $keysunique=true){
|
|
if (!$datum){
|
|
return $datum;
|
|
}
|
|
$key = array_shift($keys);
|
|
$datumkeyed = array();
|
|
foreach ($datum as $data){
|
|
if ($keys || !$keysunique){
|
|
$datumkeyed[$data->{$key}][]= $data;
|
|
} else {
|
|
$datumkeyed[$data->{$key}]= $data;
|
|
}
|
|
}
|
|
if ($keys){
|
|
foreach ($datumkeyed as $datakey => $datakeyed){
|
|
$datumkeyed[$datakey] = quiz_report_index_by_keys($datakeyed, $keys, $keysunique);
|
|
}
|
|
}
|
|
return $datumkeyed;
|
|
}
|
|
function quiz_report_unindex($datum){
|
|
if (!$datum){
|
|
return $datum;
|
|
}
|
|
$datumunkeyed = array();
|
|
foreach ($datum as $value){
|
|
if (is_array($value)){
|
|
$datumunkeyed = array_merge($datumunkeyed, quiz_report_unindex($value));
|
|
} else {
|
|
$datumunkeyed[] = $value;
|
|
}
|
|
}
|
|
return $datumunkeyed;
|
|
}
|
|
function quiz_get_regraded_qs($attemptidssql, $limitfrom=0, $limitnum=0){
|
|
global $CFG, $DB;
|
|
if ($attemptidssql && is_array($attemptidssql)){
|
|
list($asql, $params) = $DB->get_in_or_equal($attemptidssql);
|
|
$regradedqsql = "SELECT qqr.* FROM " .
|
|
"{quiz_question_regrade} qqr " .
|
|
"WHERE qqr.attemptid $asql";
|
|
$regradedqs = $DB->get_records_sql($regradedqsql, $params, $limitfrom, $limitnum);
|
|
} else if ($attemptidssql && is_object($attemptidssql)){
|
|
$regradedqsql = "SELECT qqr.* FROM " .
|
|
$attemptidssql->from.", ".
|
|
"{quiz_question_regrade} qqr " .
|
|
"WHERE qqr.attemptid = qa.uniqueid AND " .
|
|
$attemptidssql->where;
|
|
$regradedqs = $DB->get_records_sql($regradedqsql, $attemptidssql->params, $limitfrom, $limitnum);
|
|
} else {
|
|
return array();
|
|
}
|
|
return quiz_report_index_by_keys($regradedqs, array('attemptid', 'questionid'));
|
|
}
|
|
function quiz_get_average_grade_for_questions($quiz, $userids){
|
|
global $CFG, $DB;
|
|
$qmfilter = quiz_report_qm_filter_select($quiz);
|
|
list($usql, $params) = $DB->get_in_or_equal($userids);
|
|
$params[] = $quiz->id;
|
|
$questionavgssql = "SELECT qns.questionid, AVG(qs.grade) FROM
|
|
{quiz_attempts} qa
|
|
LEFT JOIN {question_sessions} qns ON (qns.attemptid = qa.uniqueid)
|
|
LEFT JOIN {question_states} qs ON (qns.newgraded = qs.id AND qs.event IN (".QUESTION_EVENTS_GRADED."))
|
|
WHERE " .
|
|
($qmfilter?$qmfilter.' AND ':'') .
|
|
"qa.userid $usql AND " .
|
|
"qa.quiz = ? ".
|
|
"GROUP BY qns.questionid";
|
|
return $DB->get_records_sql_menu($questionavgssql, $params);
|
|
}
|
|
|
|
function quiz_get_total_qas_graded_and_ungraded($quiz, $questionids, $userids){
|
|
global $CFG, $DB;
|
|
$params = array($quiz->id);
|
|
list($u_sql, $u_params) = $DB->get_in_or_equal($userids);
|
|
list($q_sql, $q_params) = $DB->get_in_or_equal($questionids);
|
|
|
|
$params = array_merge($params, $u_params, $q_params);
|
|
$sql = "SELECT qs.question, COUNT(1) AS totalattempts,
|
|
SUM(CASE WHEN (qs.event IN(".QUESTION_EVENTS_GRADED.")) THEN 1 ELSE 0 END) AS gradedattempts
|
|
FROM
|
|
{quiz_attempts} qa,
|
|
{question_sessions} qns,
|
|
{question_states} qs
|
|
WHERE
|
|
qa.quiz = ? AND
|
|
qa.userid $u_sql AND
|
|
qns.attemptid = qa.uniqueid AND
|
|
qns.newest = qs.id AND
|
|
qs.event IN (".QUESTION_EVENTS_CLOSED_OR_GRADED.") AND
|
|
qs.question $q_sql
|
|
GROUP BY qs.question";
|
|
return $DB->get_records_sql($sql, $params);
|
|
}
|
|
|
|
function quiz_format_average_grade_for_questions($avggradebyq, $questions, $quiz, $download){
|
|
$row = array();
|
|
if (!$avggradebyq){
|
|
$avggradebyq = array();
|
|
}
|
|
foreach(array_keys($questions) as $questionid) {
|
|
if (isset($avggradebyq[$questionid])){
|
|
$grade = $avggradebyq[$questionid];
|
|
$grade = quiz_rescale_grade($grade, $quiz, 'question');
|
|
} else {
|
|
$grade = '--';
|
|
}
|
|
$row['qsgrade'.$questionid] = $grade;
|
|
}
|
|
return $row;
|
|
}
|
|
/**
|
|
* Load the question data necessary in the reports.
|
|
* - Remove description questions.
|
|
* - Order questions in order that they are in the quiz
|
|
* - Add question numbers.
|
|
* - Add grade from quiz_questions_instance
|
|
*/
|
|
function quiz_report_load_questions($quiz){
|
|
global $CFG, $DB;
|
|
$questionlist = quiz_questions_in_quiz($quiz->questions);
|
|
//In fact in most cases the id IN $questionlist below is redundant
|
|
//since we are also doing a JOIN on the qqi table. But will leave it in
|
|
//since this double check will probably do no harm.
|
|
list($usql, $params) = $DB->get_in_or_equal(explode(',', $questionlist));
|
|
$params[] = $quiz->id;
|
|
if (!$questions = $DB->get_records_sql("SELECT q.*, qqi.grade AS maxgrade
|
|
FROM {question} q,
|
|
{quiz_question_instances} qqi
|
|
WHERE q.id $usql AND
|
|
qqi.question = q.id AND
|
|
qqi.quiz = ?", $params)) {
|
|
print_error('noquestionsfound', 'quiz');
|
|
}
|
|
//Now we have an array of questions from a quiz we work out there question nos and remove
|
|
//questions with zero length ie. description questions etc.
|
|
//also put questions in order.
|
|
$number = 1;
|
|
$realquestions = array();
|
|
$questionids = explode(',', $questionlist);
|
|
foreach ($questionids as $id) {
|
|
if ($questions[$id]->length) {
|
|
// Ignore questions of zero length
|
|
$realquestions[$id] = $questions[$id];
|
|
$realquestions[$id]->number = $number;
|
|
$number += $questions[$id]->length;
|
|
}
|
|
}
|
|
return $realquestions;
|
|
}
|
|
/**
|
|
* Given the quiz grading method return sub select sql to find the id of the
|
|
* one attempt that will be graded for each user. Or return
|
|
* empty string if all attempts contribute to final grade.
|
|
*/
|
|
function quiz_report_qm_filter_select($quiz){
|
|
if ($quiz->attempts == 1) {//only one attempt allowed on this quiz
|
|
return '';
|
|
}
|
|
$useridsql = 'qa.userid';
|
|
$quizidsql = 'qa.quiz';
|
|
$qmfilterattempts = true;
|
|
switch ($quiz->grademethod) {
|
|
case QUIZ_GRADEHIGHEST :
|
|
$field1 = 'sumgrades';
|
|
$field2 = 'timestart';
|
|
$aggregator1 = 'MAX';
|
|
$aggregator2 = 'MIN';
|
|
$qmselectpossible = true;
|
|
break;
|
|
case QUIZ_GRADEAVERAGE :
|
|
$qmselectpossible = false;
|
|
break;
|
|
case QUIZ_ATTEMPTFIRST :
|
|
$field1 = 'timestart';
|
|
$field2 = 'id';
|
|
$aggregator1 = 'MIN';
|
|
$aggregator2 = 'MIN';
|
|
$qmselectpossible = true;
|
|
break;
|
|
case QUIZ_ATTEMPTLAST :
|
|
$field1 = 'timestart';
|
|
$field2 = 'id';
|
|
$aggregator1 = 'MAX';
|
|
$aggregator2 = 'MAX';
|
|
$qmselectpossible = true;
|
|
break;
|
|
}
|
|
if ($qmselectpossible){
|
|
$qmselect = "qa.$field1 = (SELECT $aggregator1(qa2.$field1) FROM {quiz_attempts} qa2 WHERE qa2.quiz = $quizidsql AND qa2.userid = $useridsql) AND " .
|
|
"qa.$field2 = (SELECT $aggregator2(qa3.$field2) FROM {quiz_attempts} qa3 WHERE qa3.quiz = $quizidsql AND qa3.userid = $useridsql AND qa3.$field1 = qa.$field1)";
|
|
} else {
|
|
$qmselect = '';
|
|
}
|
|
|
|
return $qmselect;
|
|
}
|
|
|
|
function quiz_report_grade_bands($bandwidth, $bands, $quizid, $userids=array()){
|
|
global $CFG, $DB;
|
|
if ($userids){
|
|
list($usql, $params) = $DB->get_in_or_equal($userids);
|
|
} else {
|
|
$usql ='';
|
|
$params = array();
|
|
}
|
|
$sql = "SELECT
|
|
FLOOR(qg.grade/$bandwidth) AS band,
|
|
COUNT(1) AS num
|
|
FROM
|
|
{quiz_grades} qg, {quiz} q
|
|
WHERE qg.quiz = q.id " .
|
|
($usql?"AND qg.userid $usql ":'') .
|
|
"AND qg.quiz = ?
|
|
GROUP BY FLOOR(qg.grade/$bandwidth)
|
|
ORDER BY band";
|
|
$params[] = $quizid;
|
|
$data = $DB->get_records_sql_menu($sql, $params);
|
|
//need to create array elements with values 0 at indexes where there is no element
|
|
$data = $data + array_fill(0, $bands+1, 0);
|
|
ksort($data);
|
|
//place the maximum (prefect grade) into the last band i.e. make last
|
|
//band for example 9 <= g <=10 (where 10 is the perfect grade) rather than
|
|
//just 9 <= g <10.
|
|
$data[$bands-1] += $data[$bands];
|
|
unset($data[$bands]);
|
|
return $data;
|
|
}
|
|
function quiz_report_highlighting_grading_method($quiz, $qmsubselect, $qmfilter){
|
|
if ($quiz->attempts == 1) {//only one attempt allowed on this quiz
|
|
return "<p>".get_string('onlyoneattemptallowed', "quiz_overview")."</p>";
|
|
} else if (!$qmsubselect){
|
|
return "<p>".get_string('allattemptscontributetograde', "quiz_overview")."</p>";
|
|
} else if ($qmfilter){
|
|
return "<p>".get_string('showinggraded', "quiz_overview")."</p>";
|
|
}else {
|
|
return "<p>".get_string('showinggradedandungraded', "quiz_overview",
|
|
('<span class="highlight">'.quiz_get_grading_option_name($quiz->grademethod).'</span>'))."</p>";
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the feedback text for a grade on this quiz. The feedback is
|
|
* processed ready for display.
|
|
*
|
|
* @param float $grade a grade on this quiz.
|
|
* @param integer $quizid the id of the quiz object.
|
|
* @return string the comment that corresponds to this grade (empty string if there is not one.
|
|
*/
|
|
function quiz_report_feedback_for_grade($grade, $quizid, $context) {
|
|
global $DB, $CFG;
|
|
|
|
require_once($CFG->libdir . '/filelib.php');
|
|
|
|
static $feedbackcache = array();
|
|
if (!isset($feedbackcache[$quizid])){
|
|
$feedbackcache[$quizid] = $DB->get_records('quiz_feedback', array('quizid' => $quizid));
|
|
}
|
|
$feedbacks = $feedbackcache[$quizid];
|
|
$feedbackid = 0;
|
|
$feedbacktext = '';
|
|
$feedbacktextformat = FORMAT_MOODLE;
|
|
foreach ($feedbacks as $feedback) {
|
|
if ($feedback->mingrade <= $grade && $grade < $feedback->maxgrade){
|
|
$feedbackid = $feedback->id;
|
|
$feedbacktext = $feedback->feedbacktext;
|
|
$feedbacktextformat = $feedback->feedbacktextformat;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Clean the text, ready for display.
|
|
$formatoptions = new stdClass;
|
|
$formatoptions->noclean = true;
|
|
$feedbacktext = file_rewrite_pluginfile_urls($feedbacktext, 'pluginfile.php', $context->id, 'mod_quiz', 'feedback', $feedbackid);
|
|
$feedbacktext = format_text($feedbacktext, $feedbacktextformat, $formatoptions);
|
|
|
|
return $feedbacktext;
|
|
}
|
|
|
|
function quiz_report_scale_sumgrades_as_percentage($rawgrade, $quiz, $round = true) {
|
|
if ($quiz->sumgrades != 0) {
|
|
$grade = $rawgrade * 100 / $quiz->sumgrades;
|
|
if ($round) {
|
|
$grade = quiz_format_grade($quiz, $grade);
|
|
}
|
|
} else {
|
|
return '';
|
|
}
|
|
return $grade.'%';
|
|
}
|
|
/**
|
|
* Returns an array of reports to which the current user has access to.
|
|
* Reports are ordered as they should be for display in tabs.
|
|
*/
|
|
function quiz_report_list($context) {
|
|
global $DB;
|
|
static $reportlist = null;
|
|
if (!is_null($reportlist)){
|
|
return $reportlist;
|
|
}
|
|
$reports = $DB->get_records('quiz_reports', null, 'displayorder DESC', 'name, capability');
|
|
$reportdirs = get_plugin_list('quiz');
|
|
|
|
// Order the reports tab in descending order of displayorder
|
|
$reportcaps = array();
|
|
foreach ($reports as $key => $obj) {
|
|
if (array_key_exists($obj->name, $reportdirs)) {
|
|
$reportcaps[$obj->name] = $obj->capability;
|
|
}
|
|
}
|
|
|
|
// Add any other reports on the end
|
|
foreach ($reportdirs as $reportname => $notused) {
|
|
if (!isset($reportcaps[$reportname])) {
|
|
$reportcaps[$reportname] = null;
|
|
}
|
|
}
|
|
$reportlist = array();
|
|
foreach ($reportcaps as $name => $capability){
|
|
if (empty($capability)){
|
|
$capability = 'mod/quiz:viewreports';
|
|
}
|
|
if (has_capability($capability, $context)){
|
|
$reportlist[] = $name;
|
|
}
|
|
}
|
|
return $reportlist;
|
|
}
|
|
|
|
/**
|
|
* Get the default report for the current user.
|
|
* @param object $context the quiz context.
|
|
*/
|
|
function quiz_report_default_report($context) {
|
|
return reset(quiz_report_list($context));
|
|
}
|