function _get_quiz_grade_range_chart in Quiz 8.6

Same name and namespace in other branches

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

Generates grade range chart.

Parameters

int $vid: Revision id of quiz node.

int $uid: An optional user ID. If supplied, only quizzes created by that user will be returned.

Return value

array|false Array with chart and metadata, FALSE if no quiz was found.

1 call to _get_quiz_grade_range_chart()

quiz_stats_get_adv_stats in modules/quiz_stats/quiz_stats.admin.inc

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

File

modules/quiz_stats/quiz_stats.admin.inc, line 97

Administration file for Quiz stats Module.

Code

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

  // @todo: make the ranges configurable
  $query = db_select('quiz_node_results', 'qnr');
  $query
    ->addExpression('SUM(score >= 0 && score < 20)', 'zero_to_twenty');
  $query
    ->addExpression('SUM(score >= 20 && score < 40)', 'twenty_to_fourty');
  $query
    ->addExpression('SUM(score >= 40 && score < 60)', 'fourty_to_sixty');
  $query
    ->addExpression('SUM(score >= 60 && score < 80)', 'sixty_to_eighty');
  $query
    ->addExpression('SUM(score >= 80 && score <= 100)', 'eighty_to_hundred');
  $query
    ->condition('qnr.vid', $vid);
  $query
    ->condition('qnr.is_invalid', 0);
  if ($uid != 0) {
    $query
      ->condition('qnr.uid', $uid);
  }
  $range = $query
    ->execute()
    ->fetch();
  $count = $range->zero_to_twenty + $range->twenty_to_fourty + $range->fourty_to_sixty + $range->sixty_to_eighty + $range->eighty_to_hundred;
  if ($count < 2) {
    return FALSE;
  }

  // Return the chart with some meta data.
  $chart = '<div id="quiz_top_scorers" class="quiz-stats-chart-space">';
  $chart .= theme('quiz_grade_range', array(
    'range' => $range,
  ));
  $chart .= '</div>';
  return array(
    'chart' => $chart,
    'title' => t('Distribution'),
    'explanation' => t('This chart shows the distribution of the scores on this quiz.'),
  );
}