}
$cm = get_coursemodule_from_instance('offlinequiz', $offlinequiz->id);
// Check access.
require_login($offlinequiz->course, false, $cm);
$modcontext = context_module::instance($cm->id);
require_capability('offlinequiz/statistics:view', $modcontext);
if (groups_get_activity_groupmode($cm)) {
$groups = groups_get_activity_allowed_groups($cm);
} else {
$groups = array();
}
if ($offlinequizstatistics->groupid && !in_array($offlinequizstatistics->groupid, array_keys($groups))) {
print_error('groupnotamember', 'group');
}
// Load the rest of the required data.
$questions = offlinequiz_report_get_significant_questions($offlinequiz);
$questionstatistics = $DB->get_records_select('offlinequiz_q_statistics', 'offlinequizstatisticsid = ? AND slot IS NOT NULL', array($offlinequizstatistics->id));
// Create the graph, and set the basic options.
$graph = new graph(800, 600);
$graph->parameter['title'] = '';
$graph->parameter['y_label_left'] = '%';
$graph->parameter['x_label'] = get_string('position', 'offlinequiz_statistics');
$graph->parameter['y_label_angle'] = 90;
$graph->parameter['x_label_angle'] = 0;
$graph->parameter['x_axis_angle'] = 60;
$graph->parameter['legend'] = 'outside-right';
$graph->parameter['legend_border'] = 'black';
$graph->parameter['legend_offset'] = 4;
$graph->parameter['bar_size'] = 1;
$graph->parameter['zero_axis'] = 'grayEE';
// Configure what to display.
/**
* Display the report.
*/
public function display($offlinequiz, $cm, $course)
{
global $CFG, $DB, $OUTPUT, $PAGE;
$this->context = context_module::instance($cm->id);
// Work out the display options.
$download = optional_param('download', '', PARAM_ALPHA);
$everything = optional_param('everything', 0, PARAM_BOOL);
$recalculate = optional_param('recalculate', 0, PARAM_BOOL);
// A qid paramter indicates we should display the detailed analysis of a question and subquestions.
$qid = optional_param('qid', 0, PARAM_INT);
$questionid = optional_param('questionid', 0, PARAM_INT);
// Determine statistics mode.
$statmode = optional_param('statmode', 'statsoverview', PARAM_ALPHA);
$pageoptions = array();
$pageoptions['id'] = $cm->id;
$pageoptions['mode'] = 'statistics';
$pageoptions['statmode'] = $statmode;
// When showing big tables add the JavaScript for the double scrollbar.
if ($statmode == 'questionstats' || $statmode == 'questionandanswerstats') {
$module = array('name' => 'mod_offlinequiz_statistics', 'fullpath' => '/mod/offlinequiz/report/statistics/doublescroll.js', 'requires' => array(), 'strings' => array(), 'async' => false);
$PAGE->requires->jquery();
$PAGE->requires->jquery_plugin('ui');
$PAGE->requires->jquery_plugin('doubleScroll', 'mod_offlinequiz');
$PAGE->requires->js_init_call('offlinequiz_statistics_init_doublescroll', null, false, $module);
}
if (!($groups = $DB->get_records('offlinequiz_groups', array('offlinequizid' => $offlinequiz->id), 'number', '*', 0, $offlinequiz->numgroups))) {
print_error('nogroups', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
// Determine groupid.
$groupnumber = optional_param('offlinegroup', -1, PARAM_INT);
if ($groupnumber === -1 and !empty($SESSION->question_pagevars['groupnumber'])) {
$groupnumber = $SESSION->question_pagevars['groupnumber'];
}
if ($groupnumber > 0) {
$pageoptions['offlinegroup'] = $groupnumber;
$offlinequiz->groupnumber = $groupnumber;
$offlinequiz->sumgrades = $DB->get_field('offlinequiz_groups', 'sumgrades', array('offlinequizid' => $offlinequiz->id, 'number' => $groupnumber));
if ($offlinegroup = offlinequiz_get_group($offlinequiz, $groupnumber)) {
$offlinequiz->groupid = $offlinegroup->id;
$groupquestions = offlinequiz_get_group_question_ids($offlinequiz);
$offlinequiz->questions = $groupquestions;
} else {
print_error('invalidgroupnumber', 'offlinequiz');
}
} else {
$offlinequiz->groupid = 0;
// The user wants to evaluate results from all offlinequiz groups.
// Compare the sumgrades of all offlinequiz groups. First we put all sumgrades in an array.
$sumgrades = array();
foreach ($groups as $group) {
$sumgrades[] = round($group->sumgrades, $offlinequiz->decimalpoints);
}
// Now we remove duplicates.
$sumgrades = array_unique($sumgrades);
if (count($sumgrades) > 1) {
// If the groups have different sumgrades, we can't pick one.
$offlinequiz->sumgrades = -1;
} else {
if (count($sumgrades) == 1) {
// If the groups all have the same sumgrades, we pick the first one.
$offlinequiz->sumgrades = $sumgrades[0];
} else {
// Pathological, there are no sumgrades, i.e. no groups...
$offlinequiz->sumgrades = 0;
}
}
// If no group has been chosen we simply take the questions from the question instances.
$sql = "SELECT DISTINCT(questionid)\n FROM {offlinequiz_group_questions}\n WHERE offlinequizid = :offlinequizid";
$questionids = $DB->get_fieldset_sql($sql, array('offlinequizid' => $offlinequiz->id));
$offlinequiz->questions = $questionids;
}
// We warn the user if the different offlinequiz groups have different sets of questions.
$differentquestions = false;
if ($offlinequiz->groupid == 0 && count($groups) > 1 && $this->groups_have_different_questions($offlinequiz, $groups)) {
$differentquestions = true;
}
$reporturl = new moodle_url('/mod/offlinequiz/report.php', $pageoptions);
$useallattempts = 0;
// Find out current groups mode.
$currentgroup = $this->get_current_group($cm, $course, $this->context);
$nostudentsingroup = false;
// True if a group is selected and there is no one in it.
if (empty($currentgroup)) {
$currentgroup = 0;
$groupstudents = array();
} else {
if ($currentgroup == self::NO_GROUPS_ALLOWED) {
$groupstudents = array();
$nostudentsingroup = true;
} else {
// All users who can attempt offlinequizzes and who are in the currently selected group.
$groupstudents = get_users_by_capability($this->context, array('mod/offlinequiz:reviewmyattempts', 'mod/offlinequiz:attempt'), '', '', '', '', $currentgroup, '', false);
if (!$groupstudents) {
$nostudentsingroup = true;
}
}
}
// If recalculate was requested, handle that.
if ($recalculate && confirm_sesskey()) {
$this->clear_cached_data($offlinequiz->id, $currentgroup, $useallattempts, $offlinequiz->groupid);
redirect($reporturl);
}
// Set up the main table.
if ($statmode == 'statsoverview' || $statmode == 'questionstats') {
$this->table = new offlinequiz_statistics_table();
} else {
$this->table = new offlinequiz_question_answer_statistics_table();
}
if ($everything) {
$report = get_string('completestatsfilename', 'offlinequiz_statistics');
} else {
$report = get_string('questionstatsfilename', 'offlinequiz_statistics');
}
$courseshortname = format_string($course->shortname, true, array('context' => context_course::instance($course->id)));
$filename = offlinequiz_report_download_filename($report, $courseshortname, $offlinequiz->name);
$this->table->is_downloading($download, $filename, get_string('offlinequizstructureanalysis', 'offlinequiz_statistics'));
// Load the questions.
// NOTE: function is hacked to deliver question array with question IDs as keys, not the slot as before.
$questions = offlinequiz_report_get_significant_questions($offlinequiz);
$questionids = array_keys($questions);
$fullquestions = question_load_questions($questionids);
foreach ($questions as $quid => $question) {
$q = $fullquestions[$quid];
$q->maxmark = $question->maxmark;
$q->number = $question->number;
$questions[$quid] = $q;
}
// Get the data to be displayed.
list($offlinequizstats, $questions, $subquestions, $s) = $this->get_offlinequiz_and_questions_stats($offlinequiz, $currentgroup, $nostudentsingroup, $useallattempts, $groupstudents, $questions);
$offlinequizinfo = $this->get_formatted_offlinequiz_info_data($course, $cm, $offlinequiz, $offlinequizstats);
// Set up the table, if there is data.
if ($s) {
$this->table->statistics_setup($offlinequiz, $cm->id, $reporturl, $s);
}
// Print the page header stuff (if not downloading.
if (!$this->table->is_downloading()) {
$this->print_header_and_tabs($cm, $course, $offlinequiz, $statmode, 'statistics');
// Options for the help text popup_action.
$options = array('width' => 650, 'height' => 400, 'resizable' => false, 'top' => 0, 'left' => 0, 'menubar' => false, 'location' => false, 'scrollbars' => true, 'toolbar' => false, 'status' => false, 'directories' => false, 'fullscreen' => false, 'dependent' => false);
$helpfilename = 'statistics_help_';
if (current_language() == 'de') {
$helpfilename .= 'de.html';
} else {
$helpfilename .= 'en.html';
}
$url = new moodle_url($CFG->wwwroot . '/mod/offlinequiz/report/statistics/help/' . $helpfilename);
$pixicon = new pix_icon('help', get_string('statisticshelp', 'offlinequiz_statistics'));
$helpaction = $OUTPUT->action_icon($url, $pixicon, new popup_action('click', $url, 'help123', $options));
echo $OUTPUT->box_start('linkbox');
echo $OUTPUT->heading(format_string($offlinequiz->name));
echo $OUTPUT->heading(get_string($statmode . 'header', 'offlinequiz_statistics') . $helpaction);
echo $OUTPUT->box_end();
if (!$questionid) {
$this->print_offlinequiz_group_selector($cm, $groups, $groupnumber, $pageoptions);
if ($statmode == 'statsoverview') {
if ($offlinequiz->sumgrades == -1 || $differentquestions) {
echo $OUTPUT->box_start();
echo $OUTPUT->notification(get_string('remarks', 'offlinequiz_statistics') . ':', 'notifynote');
}
if ($offlinequiz->sumgrades == -1) {
echo $OUTPUT->notification('- ' . get_string('differentsumgrades', 'offlinequiz_statistics', implode(', ', $sumgrades)), 'notifynote');
}
if ($differentquestions) {
echo $OUTPUT->notification('- ' . get_string('differentquestions', 'offlinequiz_statistics', implode(', ', $sumgrades)), 'notifynote');
}
if ($offlinequiz->sumgrades == -1 || $differentquestions) {
echo $OUTPUT->box_end();
}
}
}
if (groups_get_activity_groupmode($cm)) {
groups_print_activity_menu($cm, $reporturl->out());
if ($currentgroup && !$groupstudents) {
echo $OUTPUT->notification(get_string('nostudentsingroup', 'offlinequiz_statistics'));
}
}
if (!$offlinequiz->questions) {
echo offlinequiz_no_questions_message($offlinequiz, $cm, $this->context);
} else {
if (!$this->table->is_downloading() && $s == 0) {
echo $OUTPUT->box_start('linkbox');
echo $OUTPUT->notification(get_string('noattempts', 'offlinequiz'), 'notifyproblem');
echo $OUTPUT->box_end();
echo '<br/>';
}
}
}
if ($everything) {
// Implies is downloading.
// Overall report, then the analysis of each question.
if ($statmode == 'statsoverview') {
$this->download_offlinequiz_info_table($offlinequizinfo);
} else {
if ($statmode == 'questionstats') {
if ($s) {
$this->output_offlinequiz_structure_analysis_table($s, $questions, $subquestions);
if ($this->table->is_downloading() == 'xhtml') {
$this->output_statistics_graph($offlinequizstats->id, $s);
}
foreach ($questions as $question) {
if (question_bank::get_qtype($question->qtype, false)->can_analyse_responses()) {
$this->output_individual_question_response_analysis($question, $reporturl, $offlinequizstats);
} else {
if (!empty($question->_stats->subquestions)) {
$subitemstodisplay = explode(',', $question->_stats->subquestions);
foreach ($subitemstodisplay as $subitemid) {
$this->output_individual_question_response_analysis($subquestions[$subitemid], $reporturl, $offlinequizstats);
}
}
}
}
}
} else {
if ($statmode == 'questionandanswerstats') {
if ($s) {
$this->output_offlinequiz_structure_analysis_table($s, $questions, $subquestions);
if ($this->table->is_downloading() == 'xhtml') {
$this->output_statistics_graph($offlinequizstats->id, $s);
}
foreach ($questions as $question) {
if (question_bank::get_qtype($question->qtype, false)->can_analyse_responses()) {
$this->output_individual_question_response_analysis($question, $reporturl, $offlinequizstats);
} else {
if (!empty($question->_stats->subquestions)) {
$subitemstodisplay = explode(',', $question->_stats->subquestions);
foreach ($subitemstodisplay as $subitemid) {
$this->output_individual_question_response_analysis($subquestions[$subitemid], $reporturl, $offlinequizstats);
}
}
}
}
}
}
}
}
$this->table->export_class_instance()->finish_document();
} else {
if ($questionid) {
// Report on an individual question indexed by position.
if (!isset($questions[$questionid])) {
print_error('questiondoesnotexist', 'question');
}
$this->output_individual_question_data($offlinequiz, $questions[$questionid]);
$this->output_individual_question_response_analysis($questions[$questionid], $reporturl, $offlinequizstats);
// Back to overview link.
echo $OUTPUT->box('<a href="' . $reporturl->out() . '">' . get_string('backtoquestionsandanswers', 'offlinequiz_statistics') . '</a>', 'backtomainstats boxaligncenter backlinkbox generalbox boxwidthnormal mdl-align');
} else {
if ($qid) {
// Report on an individual sub-question indexed questionid.
if (!isset($subquestions[$qid])) {
print_error('questiondoesnotexist', 'question');
}
$this->output_individual_question_data($offlinequiz, $subquestions[$qid]);
$this->output_individual_question_response_analysis($subquestions[$qid], $reporturl, $offlinequizstats);
// Back to overview link.
echo $OUTPUT->box('<a href="' . $reporturl->out() . '">' . get_string('backtoquestionsandanswers', 'offlinequiz_statistics') . '</a>', 'boxaligncenter backlinkbox generalbox boxwidthnormal mdl-align');
} else {
if ($this->table->is_downloading()) {
// Downloading overview report.
$this->download_offlinequiz_info_table($offlinequizinfo);
if ($statmode == 'questionstats') {
$this->output_offlinequiz_structure_analysis_table($s, $questions, $subquestions);
} else {
if ($statmode == 'questionandanswerstats') {
$this->output_offlinequiz_question_answer_table($s, $questions, $subquestions, $offlinequizstats);
}
}
$this->table->finish_output();
} else {
// On-screen display of overview report.
echo $this->output_caching_info($offlinequizstats, $offlinequiz->id, $currentgroup, $groupstudents, $useallattempts, $reporturl, $offlinequiz->groupid);
if ($statmode == 'statsoverview') {
echo $this->everything_download_options();
echo '<br/><center>';
echo $this->output_offlinequiz_info_table($offlinequizinfo);
echo '</center>';
} else {
if ($statmode == 'questionstats') {
if ($s) {
echo '<br/>';
$this->output_offlinequiz_structure_analysis_table($s, $questions, $subquestions);
}
} else {
if ($statmode == 'questionandanswerstats') {
if ($s) {
echo '<br/>';
$this->output_offlinequiz_question_answer_table($s, $questions, $subquestions, $offlinequizstats);
}
}
}
}
}
}
}
}
}
