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function quiz_start_check in Quiz 7

Same name and namespace in other branches
  1. 8.4 quiz.module \quiz_start_check()
  2. 6.4 quiz.module \quiz_start_check()
  3. 7.6 quiz.module \quiz_start_check()
  4. 7.4 quiz.module \quiz_start_check()

Actions to take place at the start of a quiz.

This is called when the quiz node is viewed for the first time. It ensures that the quiz can be taken at this time.

Parameters

$quiz: The quiz node.

$rid: The result ID

Return value

Return quiz_node_results result_id, or FALSE if there is an error.

Related topics

Public API functions.
1 call to quiz_start_check()
quiz_take_quiz in ./quiz.module
Handles quiz taking.

File

./quiz.module, line 2582
Quiz Module

Code

function quiz_start_check($quiz, $rid) {
  global $user;
  $user_is_admin = user_access('edit any quiz') || user_access('edit own quiz') && $quiz->uid == $user->uid;

  // Make sure this is available.
  if ($quiz->quiz_always != 1) {

    // Compare current GMT time to the open and close dates (which should still
    // be in GMT time).
    $now = gmmktime();
    if ($now >= $quiz->quiz_close || $now < $quiz->quiz_open) {
      if ($user_is_admin) {
        drupal_set_message(t('You are marked as an administrator or owner for this quiz. While you can take this quiz, the open/close times prohibit other users from taking this quiz.'), 'status');
      }
      else {
        drupal_set_message(t('This @quiz is not currently available.', array(
          '@quiz' => QUIZ_NAME,
        )), 'status');

        // Can't take quiz.
        return FALSE;
      }
    }
  }

  // Check to see if this user is allowed to take the quiz again:
  if ($quiz->takes > 0) {
    $query = "SELECT COUNT(*) AS takes FROM {quiz_node_results} WHERE uid = %d AND nid = %d";
    $taken = db_query("SELECT COUNT(*) AS takes FROM {quiz_node_results} WHERE uid = :uid AND nid = :nid", array(
      ':uid' => $user->uid,
      ':nid' => $quiz->nid,
    ))
      ->fetchField();
    $allowed_times = format_plural($quiz->takes, '1 time', '@count times');
    $taken_times = format_plural($taken, '1 time', '@count times');

    // The user has already taken this quiz.
    if ($taken) {
      if ($user_is_admin) {
        drupal_set_message(t('You have taken this quiz already. You are marked as an owner or administrator for this quiz, so you can take this quiz as many times as you would like.'), 'status');
      }
      elseif ($taken >= $quiz->takes) {
        drupal_set_message(t('You have already taken this quiz @really. You may not take it again.', array(
          '@really' => $taken_times,
        )), 'error');
        return FALSE;
      }
      elseif ($quiz->show_attempt_stats) {
        drupal_set_message(t("You can only take this quiz @allowed. You have taken it @really.", array(
          '@allowed' => $allowed_times,
          '@really' => $taken_times,
        )), 'status');
      }
    }
  }

  // Check to see if the user is registered, and user alredy passed this quiz.
  if ($user->uid && quiz_is_passed($user->uid, $quiz->nid, $quiz->vid)) {
    drupal_set_message(t('You have already passed this @quiz.', array(
      '@quiz' => QUIZ_NAME,
    )), 'status');
  }

  // Call hook_quiz_begin().
  module_invoke_all('quiz_begin', $quiz, $rid);
  return TRUE;
}