function display($quiz, $cm, $course)
{
/// This function just displays the report
global $CFG, $SESSION, $db, $QTYPES;
$strnoquiz = get_string('noquiz', 'quiz');
$strnoattempts = get_string('noattempts', 'quiz');
/// Only print headers if not asked to download data
$download = optional_param('download', NULL);
if (!$download) {
$this->print_header_and_tabs($cm, $course, $quiz, $reportmode = "analysis");
}
/// Construct the table for this particular report
if (!$quiz->questions) {
print_heading($strnoattempts);
return true;
}
/// Check to see if groups are being used in this quiz
if ($groupmode = groupmode($course, $cm)) {
// Groups are being used
if (!$download) {
$currentgroup = setup_and_print_groups($course, $groupmode, "report.php?id={$cm->id}&mode=analysis");
} else {
$currentgroup = get_and_set_current_group($course, $groupmode);
}
} else {
$currentgroup = get_and_set_current_group($course, $groupmode);
}
// set Table and Analysis stats options
if (!isset($SESSION->quiz_analysis_table)) {
$SESSION->quiz_analysis_table = array('attemptselection' => 0, 'lowmarklimit' => 0, 'pagesize' => 10);
}
foreach ($SESSION->quiz_analysis_table as $option => $value) {
$urlparam = optional_param($option, NULL);
if ($urlparam === NULL) {
${$option} = $value;
} else {
${$option} = $SESSION->quiz_analysis_table[$option] = $urlparam;
}
}
$scorelimit = $quiz->sumgrades * $lowmarklimit / 100;
// ULPGC ecastro DEBUG this is here to allow for different SQL to select attempts
switch ($attemptselection) {
case QUIZ_ALLATTEMPTS:
$limit = '';
$group = '';
break;
case QUIZ_HIGHESTATTEMPT:
$limit = ', max(qa.sumgrades) ';
$group = ' GROUP BY qa.userid ';
break;
case QUIZ_FIRSTATTEMPT:
$limit = ', min(qa.timemodified) ';
$group = ' GROUP BY qa.userid ';
break;
case QUIZ_LASTATTEMPT:
$limit = ', max(qa.timemodified) ';
$group = ' GROUP BY qa.userid ';
break;
}
if ($attemptselection != QUIZ_ALLATTEMPTS) {
$sql = 'SELECT qa.userid ' . $limit . 'FROM ' . $CFG->prefix . 'user u LEFT JOIN ' . $CFG->prefix . 'quiz_attempts qa ON u.id = qa.userid ' . 'WHERE qa.quiz = ' . $quiz->id . ' AND qa.preview = 0 ' . $group;
$usermax = get_records_sql_menu($sql);
}
$groupmembers = '';
$groupwhere = '';
//Add this to the SQL to show only group users
if ($currentgroup) {
$groupmembers = ', ' . groups_members_from_sql();
$groupwhere = ' AND ' . groups_members_where_sql($currentgroup, 'u.id');
}
$sql = 'SELECT qa.* FROM ' . $CFG->prefix . 'quiz_attempts qa, ' . $CFG->prefix . 'user u ' . $groupmembers . 'WHERE u.id = qa.userid AND qa.quiz = ' . $quiz->id . ' AND qa.preview = 0 AND ( qa.sumgrades >= ' . $scorelimit . ' ) ' . $groupwhere;
// ^^^^^^ es posible seleccionar aqu TODOS los quizzes, como quiere Jussi,
// pero habra que llevar la cuenta ed cada quiz para restaura las preguntas (quizquestions, states)
/// Fetch the attempts
$attempts = get_records_sql($sql);
if (empty($attempts)) {
print_heading(get_string('nothingtodisplay'));
$this->print_options_form($quiz, $cm, $attemptselection, $lowmarklimit, $pagesize);
return true;
}
/// Here we rewiew all attempts and record data to construct the table
$questions = array();
$statstable = array();
$questionarray = array();
foreach ($attempts as $attempt) {
$questionarray[] = quiz_questions_in_quiz($attempt->layout);
}
$questionlist = quiz_questions_in_quiz(implode(",", $questionarray));
$questionarray = array_unique(explode(",", $questionlist));
$questionlist = implode(",", $questionarray);
unset($questionarray);
foreach ($attempts as $attempt) {
switch ($attemptselection) {
case QUIZ_ALLATTEMPTS:
$userscore = 0;
// can be anything, not used
break;
case QUIZ_HIGHESTATTEMPT:
$userscore = $attempt->sumgrades;
break;
case QUIZ_FIRSTATTEMPT:
$userscore = $attempt->timemodified;
break;
case QUIZ_LASTATTEMPT:
$userscore = $attempt->timemodified;
break;
}
if ($attemptselection == QUIZ_ALLATTEMPTS || $userscore == $usermax[$attempt->userid]) {
$sql = "SELECT q.*, i.grade AS maxgrade, i.id AS instance" . " FROM {$CFG->prefix}question q," . " {$CFG->prefix}quiz_question_instances i" . " WHERE i.quiz = '{$quiz->id}' AND q.id = i.question" . " AND q.id IN ({$questionlist})";
if (!($quizquestions = get_records_sql($sql))) {
error('No questions found');
}
// Load the question type specific information
if (!get_question_options($quizquestions)) {
error('Could not load question options');
}
// Restore the question sessions to their most recent states
// creating new sessions where required
if (!($states = get_question_states($quizquestions, $quiz, $attempt))) {
error('Could not restore question sessions');
}
$numbers = explode(',', $questionlist);
$statsrow = array();
foreach ($numbers as $i) {
if (!isset($quizquestions[$i]) or !isset($states[$i])) {
continue;
}
$qtype = $quizquestions[$i]->qtype == 'random' ? $states[$i]->options->question->qtype : $quizquestions[$i]->qtype;
$q = get_question_responses($quizquestions[$i], $states[$i]);
if (empty($q)) {
continue;
}
$qid = $q->id;
if (!isset($questions[$qid])) {
$questions[$qid]['id'] = $qid;
$questions[$qid]['qname'] = $quizquestions[$i]->name;
foreach ($q->responses as $answer => $r) {
$r->count = 0;
$questions[$qid]['responses'][$answer] = $r->answer;
$questions[$qid]['rcounts'][$answer] = 0;
$questions[$qid]['credits'][$answer] = $r->credit;
$statsrow[$qid] = 0;
}
}
$responses = get_question_actual_response($quizquestions[$i], $states[$i]);
foreach ($responses as $resp) {
if ($resp) {
if ($key = array_search($resp, $questions[$qid]['responses'])) {
$questions[$qid]['rcounts'][$key]++;
} else {
$test = new stdClass();
$test->responses = $QTYPES[$quizquestions[$i]->qtype]->get_correct_responses($quizquestions[$i], $states[$i]);
if ($key = $QTYPES[$quizquestions[$i]->qtype]->check_response($quizquestions[$i], $states[$i], $test)) {
$questions[$qid]['rcounts'][$key]++;
} else {
$questions[$qid]['responses'][] = $resp;
$questions[$qid]['rcounts'][] = 1;
$questions[$qid]['credits'][] = 0;
}
}
}
}
$statsrow[$qid] = get_question_fraction_grade($quizquestions[$i], $states[$i]);
}
$attemptscores[$attempt->id] = $attempt->sumgrades;
$statstable[$attempt->id] = $statsrow;
}
}
// Statistics Data table built
unset($attempts);
unset($quizquestions);
unset($states);
// now calculate statistics and set the values in the $questions array
$top = max($attemptscores);
$bottom = min($attemptscores);
$gap = ($top - $bottom) / 3;
$top -= $gap;
$bottom += $gap;
foreach ($questions as $qid => $q) {
$questions[$qid] = $this->report_question_stats($q, $attemptscores, $statstable, $top, $bottom);
}
unset($attemptscores);
unset($statstable);
/// Now check if asked download of data
if ($download = optional_param('download', NULL)) {
$filename = clean_filename("{$course->shortname} " . format_string($quiz->name, true));
switch ($download) {
case "Excel":
$this->Export_Excel($questions, $filename);
break;
case "ODS":
$this->Export_ODS($questions, $filename);
break;
case "CSV":
$this->Export_CSV($questions, $filename);
break;
}
}
/// Construct the table for this particular report
$tablecolumns = array('id', 'qname', 'responses', 'credits', 'rcounts', 'rpercent', 'facility', 'qsd', 'disc_index', 'disc_coeff');
$tableheaders = array(get_string('qidtitle', 'quiz_analysis'), get_string('qtexttitle', 'quiz_analysis'), get_string('responsestitle', 'quiz_analysis'), get_string('rfractiontitle', 'quiz_analysis'), get_string('rcounttitle', 'quiz_analysis'), get_string('rpercenttitle', 'quiz_analysis'), get_string('facilitytitle', 'quiz_analysis'), get_string('stddevtitle', 'quiz_analysis'), get_string('dicsindextitle', 'quiz_analysis'), get_string('disccoefftitle', 'quiz_analysis'));
$table = new flexible_table('mod-quiz-report-itemanalysis');
$table->define_columns($tablecolumns);
$table->define_headers($tableheaders);
$table->define_baseurl($CFG->wwwroot . '/mod/quiz/report.php?q=' . $quiz->id . '&mode=analysis');
$table->sortable(true);
$table->no_sorting('rpercent');
$table->collapsible(true);
$table->initialbars(false);
$table->column_class('id', 'numcol');
$table->column_class('credits', 'numcol');
$table->column_class('rcounts', 'numcol');
$table->column_class('rpercent', 'numcol');
$table->column_class('facility', 'numcol');
$table->column_class('qsd', 'numcol');
$table->column_class('disc_index', 'numcol');
$table->column_class('disc_coeff', 'numcol');
$table->column_suppress('id');
$table->column_suppress('qname');
$table->column_suppress('facility');
$table->column_suppress('qsd');
$table->column_suppress('disc_index');
$table->column_suppress('disc_coeff');
$table->set_attribute('cellspacing', '0');
$table->set_attribute('id', 'itemanalysis');
$table->set_attribute('class', 'generaltable generalbox');
// Start working -- this is necessary as soon as the niceties are over
$table->setup();
$tablesort = $table->get_sql_sort();
$sorts = explode(",", trim($tablesort));
if ($tablesort and is_array($sorts)) {
$sortindex = array();
$sortorder = array();
foreach ($sorts as $sort) {
$data = explode(" ", trim($sort));
$sortindex[] = trim($data[0]);
$s = trim($data[1]);
if ($s == "ASC") {
$sortorder[] = SORT_ASC;
} else {
$sortorder[] = SORT_DESC;
}
}
if (count($sortindex) > 0) {
$sortindex[] = "id";
$sortorder[] = SORT_ASC;
foreach ($questions as $qid => $row) {
$index1[$qid] = $row[$sortindex[0]];
$index2[$qid] = $row[$sortindex[1]];
}
array_multisort($index1, $sortorder[0], $index2, $sortorder[1], $questions);
}
}
$format_options = new stdClass();
$format_options->para = false;
$format_options->noclean = true;
$format_options->newlines = false;
// Now it is time to page the data, simply slice the keys in the array
if (!isset($pagesize) || (int) $pagesize < 1) {
$pagesize = 10;
}
$table->pagesize($pagesize, count($questions));
$start = $table->get_page_start();
$pagequestions = array_slice(array_keys($questions), $start, $pagesize);
foreach ($pagequestions as $qnum) {
$q = $questions[$qnum];
$qid = $q['id'];
$question = get_record('question', 'id', $qid);
if (has_capability('moodle/question:manage', get_context_instance(CONTEXT_COURSE, $course->id))) {
$qnumber = " (" . link_to_popup_window('/question/question.php?id=' . $qid, '&cmid=' . $cm->id . 'editquestion', $qid, 450, 550, get_string('edit'), 'none', true) . ") ";
} else {
$qnumber = $qid;
}
$qname = '<div class="qname">' . format_text($question->name . " : ", $question->questiontextformat, $format_options, $quiz->course) . '</div>';
$qicon = print_question_icon($question, true);
$qreview = quiz_question_preview_button($quiz, $question);
$qtext = format_text($question->questiontext, $question->questiontextformat, $format_options, $quiz->course);
$qquestion = $qname . "\n" . $qtext . "\n";
$responses = array();
foreach ($q['responses'] as $aid => $resp) {
$response = new stdClass();
if ($q['credits'][$aid] <= 0) {
$qclass = 'uncorrect';
} elseif ($q['credits'][$aid] == 1) {
$qclass = 'correct';
} else {
$qclass = 'partialcorrect';
}
$response->credit = '<span class="' . $qclass . '">(' . format_float($q['credits'][$aid], 2) . ') </span>';
$response->text = '<span class="' . $qclass . '">' . format_text($resp, FORMAT_MOODLE, $format_options, $quiz->course) . ' </span>';
$count = $q['rcounts'][$aid] . '/' . $q['count'];
$response->rcount = $count;
$response->rpercent = '(' . format_float($q['rcounts'][$aid] / $q['count'] * 100, 0) . '%)';
$responses[] = $response;
}
$facility = format_float($q['facility'] * 100, 0) . "%";
$qsd = format_float($q['qsd'], 3);
$di = format_float($q['disc_index'], 2);
$dc = format_float($q['disc_coeff'], 2);
$response = array_shift($responses);
$table->add_data(array($qnumber . "\n<br />" . $qicon . "\n " . $qreview, $qquestion, $response->text, $response->credit, $response->rcount, $response->rpercent, $facility, $qsd, $di, $dc));
foreach ($responses as $response) {
$table->add_data(array('', '', $response->text, $response->credit, $response->rcount, $response->rpercent, '', '', '', ''));
}
}
print_heading_with_help(get_string("analysistitle", "quiz_analysis"), "itemanalysis", "quiz");
echo '<div id="tablecontainer">';
$table->print_html();
echo '</div>';
$this->print_options_form($quiz, $cm, $attemptselection, $lowmarklimit, $pagesize);
return true;
}
echo "<tr>";
echo "<th>Question</th>";
echo "<th>Answer</th>";
echo "<th>Score</th>";
echo "</tr>";
echo "</thead>";
echo "<tbody>";
$cnt = 0;
$score = 0;
// Print Quiz Attempt Review
foreach ($attemptobj->get_question_ids($page) as $id) {
$cnt++;
$score += $attemptobj->get_question_score($id);
$actual = $attemptobj->get_actual_id($id, false, $attemptobj->attempt_url($id, $page));
$question = $DB->get_record('question', array('id' => $actual));
$responses = get_question_actual_response($attemptobj->get_question($id), $attemptobj->get_question_state($id));
echo "<tr class='odd'><td colspan='3'>Question: " . $cnt . "</td></tr>";
echo "<tr>";
// Question
echo "<td>" . replace_keywords($attemptid, $question->questiontext) . "</td>";
echo "<td>";
// Answer
foreach ($responses as $r) {
echo replace_keywords($attemptid, $r);
}
echo "</td>";
// Score
echo "<td>" . $attemptobj->get_question_score($id) . "</td>";
echo "</tr>";
}
echo "</tbody>";
