function user_block_view

Implements hook_block_view().

File

drupal/modules/user/user.module, line 1434

Enables the user registration and login system.

Code

function user_block_view($delta = '') {
  global $user;
  $block = array();
  switch ($delta) {
    case 'login':

      // For usability's sake, avoid showing two login forms on one page.
      if (!$user->uid && !(arg(0) == 'user' && !is_numeric(arg(1)))) {
        $block['subject'] = t('User login');
        $block['content'] = drupal_get_form('user_login_block');
      }
      return $block;
    case 'new':
      if (user_access('access content')) {

        // Retrieve a list of new users who have subsequently accessed the site successfully.
        $items = db_query_range('SELECT uid, name FROM {users} WHERE status <> 0 AND access <> 0 ORDER BY created DESC', 0, variable_get('user_block_whois_new_count', 5))
          ->fetchAll();
        $output = theme('user_list', array(
          'users' => $items,
        ));
        $block['subject'] = t('Who\'s new');
        $block['content'] = $output;
      }
      return $block;
    case 'online':
      if (user_access('access content')) {

        // Count users active within the defined period.
        $interval = REQUEST_TIME - variable_get('user_block_seconds_online', 900);

        // Perform database queries to gather online user lists. We use s.timestamp
        // rather than u.access because it is much faster.
        $authenticated_count = db_query("SELECT COUNT(DISTINCT s.uid) FROM {sessions} s WHERE s.timestamp >= :timestamp AND s.uid > 0", array(
          ':timestamp' => $interval,
        ))
          ->fetchField();
        $output = '<p>' . format_plural($authenticated_count, 'There is currently 1 user online.', 'There are currently @count users online.') . '</p>';

        // Display a list of currently online users.
        $max_users = variable_get('user_block_max_list_count', 10);
        if ($authenticated_count && $max_users) {
          $items = db_query_range('SELECT u.uid, u.name, MAX(s.timestamp) AS max_timestamp FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.timestamp >= :interval AND s.uid > 0 GROUP BY u.uid, u.name ORDER BY max_timestamp DESC', 0, $max_users, array(
            ':interval' => $interval,
          ))
            ->fetchAll();
          $output .= theme('user_list', array(
            'users' => $items,
          ));
        }
        $block['subject'] = t('Who\'s online');
        $block['content'] = $output;
      }
      return $block;
  }
}