function _get_quiz_status_chart in Quiz 7

Same name and namespace in other branches

1. 8.6 modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
2. 8.4 modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
3. 8.5 modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
4. 6.6 includes/quiz_dashboard/quiz_dashboard.admin.inc \_get_quiz_status_chart()
5. 6.4 includes/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
6. 7.6 modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
7. 7.4 includes/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
8. 7.5 modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()
9. 6.x modules/quiz_stats/quiz_stats.admin.inc \_get_quiz_status_chart()

Generates a chart showing the status for all registered responses to a quiz

Parameters

$vid: revision id of quiz node

$uid: User id

Return value

HTML to render to chart/graph

1 call to _get_quiz_status_chart()

quiz_stats_get_adv_stats in includes/quiz_stats/quiz_stats.admin.inc

Get stats for a single quiz. Maybe also for a single user.

File

includes/quiz_stats/quiz_stats.admin.inc, line 178

Administration file for Quiz stats Module

Code

function _get_quiz_status_chart($vid, $uid = 0) {

  // get the pass rate of the given quiz by vid
  $pass_rate = db_query("SELECT pass_rate FROM {quiz_node_properties} WHERE vid = :vid", array(
    ':vid' => $vid,
  ))
    ->fetchField();
  if (!$pass_rate) {
    return;
  }

  // get the count value of results row above and below pass rate
  $quiz = db_query("SELECT SUM(score > {$pass_rate}) AS no_pass, SUM(score < {$pass_rate}) AS no_fail, SUM(score = 0) AS no_incomplete FROM {quiz_node_results} WHERE vid = :vid", array(
    ':vid' => $vid,
  ))
    ->fetchAssoc();
  if ($quiz['no_pass'] + $quiz['no_fail'] + $quiz['no_incomplete'] < 3) {
    return FALSE;

    // no sufficient data
  }

  // generates quiz status chart 3D pie chart
  $chart = '<div id="get_quiz_status_chart" class="quiz-stats-chart-space">';
  $chart .= theme('get_quiz_status_chart', array(
    'quiz' => $quiz,
  ));
  $chart .= '</div>';
  return array(
    'chart' => $chart,
    'title' => t('Status'),
    'explanation' => t('This chart shows the status for all attempts made to answer this revision of the quiz.'),
  );
}