/**
* Analyse completed test
*
* This function is used to analyse completed test. Scores are calculated for
* each unit and subunit, based on the corresponding questions performance.
* <br/>Example:
* <code>
* list($parentScores, $analysisCode) = $completedTest -> analyseTest();
* </code>
* The function returns an array with 2 separate elements: The first element is the array
* of scores per unit, which is needed in order to display the chart. The second element
* is the content tree, where the scores per unit are depicted.
*
* @return array A results array.
* @since 3.5.2
* @access public
*/
public function analyseTest()
{
$parentScores = array();
foreach ($this->questions as $question) {
$questionIds[$question->question['content_ID']]['score'] += $question->score;
$questionIds[$question->question['content_ID']]['total']++;
$question->score > 0 ? $questionIds[$question->question['content_ID']]['correct'] += $question->score / 100 : null;
}
$questionsStats = EfrontStats::getQuestionsUnitStatistics($this->questions);
//Get unit names and ids
$content = new EfrontContentTree(key($this->getLesson()));
if (isset($_GET['entity']) && $_GET['entity']) {
$temp = $content->seekNode($_GET['entity']);
$tree[0] = new EfrontUnit(array('id' => 0, 'name' => _NOUNIT, 'active' => 1, $temp['id'] => $temp));
//Add a bogus unit to hold questions which do not belong to a unit
$iterator = new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($tree), RecursiveIteratorIterator::SELF_FIRST));
} else {
$tree = $content->tree;
$tree[0] = new EfrontUnit(array('id' => 0, 'name' => _NOUNIT, 'active' => 1));
//Add a bogus unit to hold questions which do not belong to a unit
$iterator = new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($content->tree), RecursiveIteratorIterator::SELF_FIRST));
}
foreach ($iterator as $key => $value) {
if ($key != 0) {
foreach ($content->getNodeAncestors($key) as $id => $foo) {
$parentScores[$foo['id']]['score'] += $questionIds[$key]['score'];
$parentScores[$foo['id']]['total'] += $questionIds[$key]['total'];
$parentScores[$foo['id']]['correct'] += $questionIds[$key]['correct'];
}
$parentScores[$key]['this_score'] += $questionIds[$key]['score'];
$parentScores[$key]['this_total'] += $questionIds[$key]['total'];
$parentScores[$key]['this_correct'] += $questionIds[$key]['correct'];
$parentScores[$key]['name'] = $value['name'];
// Check if this chapter is a parent one.
if (isset($content->tree[$key])) {
$parentScores[$key]['top_level'] = 1;
} else {
$parentScores[$key]['top_level'] = 0;
}
}
}
foreach ($parentScores as $id => $value) {
if ($value['total']) {
$parentScores[$id]['percentage'] = round($value['score'] / $value['total'], 2);
}
if ($value['this_total']) {
$parentScores[$id]['this_percentage'] = round($value['this_score'] / $value['this_total'], 2);
}
if ($value['total']) {
$options['custom'][$id] = '
<span style = "margin-left:20px;color:gray">' . $parentScores[$id]['percentage'] . '% [' . $value['correct'] . '/' . $value['total'] . ']</span>
<img src = "images/16x16/information.png" style = "vertical-align:middle" alt = "" title = "' . _THISLEVEL . ': ' . $parentScores[$id]['this_percentage'] . '% [' . $value['this_correct'] . '/' . $value['this_total'] . ']';
if ($value['total'] - $value['this_total'] > 0) {
$options['custom'][$id] .= '/ ' . _BELOWLEVELS . ': ' . round(($value['score'] - $value['this_score']) / ($value['total'] - $value['this_total']), 2) . '% [' . ($value['correct'] - $value['this_correct']) . '/' . ($value['total'] - $value['this_total']) . '] ';
}
$options['custom'][$id] .= '">';
} else {
unset($parentScores[$id]);
}
}
$iterator = new analyseTestFilterIterator(new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($content->tree), RecursiveIteratorIterator::SELF_FIRST)), array_keys($parentScores));
$options['show_hide'] = false;
$options['noclick'] = true;
//$options['tree_root'] = array('name' => _BACKTOTOP, 'class' => 'examples', 'onclick' => "$('analysis_frame').src = $('analysis_frame').src.replace(/selected_unit=(\d*)/, 'selected_unit='+Element.extend(this).up().id.replace(/node/, ''));");
//$options['onclick'] = "re = new RegExp(this.up().id.replace(/node/, ''), 'g');if(treeObj.getNodeOrders().match(re).length > 1) $('analysis_frame').src = $('analysis_frame').src.replace(/selected_unit=(\d*)/, 'selected_unit='+Element.extend(this).up().id.replace(/node/, ''));";
$options['onclick'] = "showGraph(\$('proto_chart'), 'graph_test_analysis', Element.extend(this).up().id.replace(/node/, ''));";
return array($parentScores, $content->toHTML($iterator, false, $options));
}
