function fb_username_alter in Drupal for Facebook 7.4

Same name and namespace in other branches

1. 6.3 fb.module \fb_username_alter()
2. 6.2 fb.module \fb_username_alter()
3. 7.3 fb.module \fb_username_alter()

hook_username_alter().

Return a user's facebook name, instead of local username. Drupal invokes this hook A LOT! So caching is important.

This function can be called very early in the bootstrap process, before the modules are initialized, in which case we will fail to alter the name.

File

./fb.module, line 426

Code

function fb_username_alter(&$name, $account) {
  $enabled = variable_get(FB_VAR_ALTER_USERNAME, FB_ALTER_USERNAME_ALWAYS);
  if ($enabled == FB_ALTER_USERNAME_NEVER) {

    // Altering disabled.
    return;
  }

  // Skip on admin pages.
  if (arg(0) == 'admin') {
    return;
  }

  // First we try the static cache.
  $names_cache =& drupal_static(__FUNCTION__);
  if (isset($names_cache[$account->uid])) {
    if (!empty($names_cache[$account->uid])) {
      $name = $names_cache[$account->uid];
    }
    return;
  }
  if ($pos = strpos($name, '@facebook')) {

    // Only alter unique names created by fb_user.module.
    if ($fbu = substr($name, 0, $pos)) {

      // Querying names from facebook is expensive, so try local cache first.
      $cache_key = 'fb_username_' . $fbu;
      $cache = cache_get($cache_key);
      if ($cache && $cache->data) {
        $names_cache[$account->uid] = $cache->data;
      }
      else {

        // Nothing cached so we have to query facebook.com.
        try {
          $data = fb_graph($fbu);

          // TODO token
          $names_cache[$account->uid] = $data['name'];
          if ($names_cache[$account->uid]) {

            //cache_set($cache_key, $names_cache[$account->uid]);
          }
        } catch (Exception $e) {
          fb_log_exception($e, t('Failed to alter username for facebook user %fbu', array(
            '%fbu' => $fbu,
          )));
          $names_cache[$account->uid] = FALSE;
        }
      }
      if (!empty($names_cache[$account->uid])) {
        $name = $names_cache[$account->uid];
      }
    }
  }
  else {
    $names_cache[$account->uid] = FALSE;
  }
}