function advpoll_writein_merge_form_submit in Advanced Poll 5

Same name and namespace in other branches

1. 6.3 advpoll.module \advpoll_writein_merge_form_submit()
2. 6 advpoll.module \advpoll_writein_merge_form_submit()
3. 6.2 advpoll.module \advpoll_writein_merge_form_submit()

File

./advpoll.module, line 1612

Advanced Poll - a sophisticated polling module for voting, elections, and group decision-making.

Code

function advpoll_writein_merge_form_submit($form_id, $form_values) {

  // Get a list of votes in this node.
  $raw_votes = db_query('SELECT * FROM {votingapi_vote} WHERE content_id = %d', $form_values['nid']);
  $voters = array();
  $affected_voters = array();
  while ($vote = db_fetch_object($raw_votes)) {
    $key = $vote->uid . '-' . $vote->hostname;
    if (!isset($voters[$key])) {
      $voters[$key] = array();
    }
    array_push($voters[$key], $vote);
    if ($vote->tag == $form_values['source']) {

      // This voter is affected by the merge; save the index of the source vote.
      $affected_voters[$key] = count($voters[$key]) - 1;
    }
  }

  // Now fix the affected voters.
  foreach ($affected_voters as $key => $source_index) {

    // Find out if they voted for the destination or not.
    $voted_for_destination = FALSE;
    foreach ($voters[$key] as $index => $vote) {
      if ($vote->tag == $form_values['destination']) {
        $voted_for_destination = TRUE;
        break;
      }
    }
    if ($voted_for_destination) {

      // Since they already voted for the destination choice,  delete the vote
      // for the source.
      db_query('DELETE FROM {votingapi_vote} WHERE vote_id = %d AND tag = %d', $voters[$key][$index]->vote_id, $form_values['source']);
    }
    else {

      // They didn't already vote for the destination, so transfer the vote for
      // the source to the destination.
      db_query('UPDATE {votingapi_vote} SET tag = %d WHERE vote_id = %d AND tag = %d', $form_values['destination'], $voters[$key][$index]->vote_id, $form_values['source']);
    }
  }

  // Delete the merged choice.
  db_query('DELETE FROM {advpoll_choices} WHERE cid = %d', $form_values['source']);
  votingapi_recalculate_results('advpoll', $form_values['nid']);
  drupal_set_message(t('Write-in merged.'));

  // Unset destination form element so that drupal_goto() doesn't use it
  // mistakenly.
  unset($_REQUEST['destination']);
  drupal_goto('node/' . $form_values['nid'] . '/writeins');
}