function privatemsg_autocomplete in Privatemsg 6.2

Same name and namespace in other branches

1. 5.3 privatemsg.module \privatemsg_autocomplete()
2. 5 privatemsg.module \privatemsg_autocomplete()
3. 7.2 privatemsg.pages.inc \privatemsg_autocomplete()
4. 7 privatemsg.pages.inc \privatemsg_autocomplete()

Return autocomplete results for usernames.

Prevents usernames from being used and/or suggested twice.

3 string references to 'privatemsg_autocomplete'

pm_block_user_menu in pm_block_user/pm_block_user.module

Implements hook_menu().

privatemsg_filter_menu in privatemsg_filter/privatemsg_filter.module

Implements hook_menu().

privatemsg_menu in ./privatemsg.module

Implements hook_menu().

File

./privatemsg.pages.inc, line 721

User menu callbacks for Privatemsg.

Code

function privatemsg_autocomplete($string) {
  $names = array();

  // 1: Parse $string and build list of valid user names.
  $fragments = explode(',', $string);
  foreach ($fragments as $index => $name) {
    if ($name = trim($name)) {
      $names[$name] = $name;
    }
  }

  // 2: Find the next user name suggestion.
  $fragment = array_pop($names);
  $matches = array();
  if (!empty($fragment)) {
    $remaining = 10;
    $types = privatemsg_recipient_get_types();
    foreach ($types as $name => $type) {
      if (isset($type['autocomplete']) && is_callable($type['autocomplete']) && privatemsg_recipient_access($name, 'write')) {
        $function = $type['autocomplete'];
        $return = $function($fragment, $names, $remaining);
        if (is_array($return) && !empty($return)) {
          $matches = array_merge($matches, $return);
        }
        $remaining = 10 - count($matches);
        if ($remaining <= 0) {
          break;
        }
      }
    }
  }

  // Allow modules to alter the autocomplete list.
  drupal_alter('privatemsg_autocomplete', $matches, $names, $fragment);

  // Format the suggestions.
  $themed_matches = array();
  foreach ($matches as $key => $match) {
    $themed_matches[$key] = privatemsg_recipient_format($match, array(
      'plain' => TRUE,
    ));
  }

  // Check if there are any duplicates.
  if (count(array_unique($themed_matches)) != count($themed_matches)) {

    // Loop over matches, look for duplicates of each one.
    foreach ($themed_matches as $key => $themed_match) {
      $duplicate_keys = array_keys($themed_matches, $themed_match);
      if (count($duplicate_keys) > 1) {

        // There are duplicates, make them unique.
        foreach ($duplicate_keys as $duplicate_key) {

          // Reformat them with unique argument.
          $themed_matches[$duplicate_key] = privatemsg_recipient_format($matches[$duplicate_key], array(
            'plain' => TRUE,
            'unique' => TRUE,
          ));
        }
      }
    }
  }

  // Prefix the matches and convert them to the correct form for the
  // autocomplete.
  $prefix = count($names) ? implode(", ", $names) . ", " : '';
  $suggestions = array();
  foreach ($themed_matches as $match) {
    $suggestions[$prefix . $match . ', '] = $match;
  }

  // convert to object to prevent drupal bug, see http://drupal.org/node/175361
  drupal_json((object) $suggestions);
}