function _fb_registration_extract_fb_fields in Drupal for Facebook 7.3

Same name and namespace in other branches

1. 6.3 contrib/fb_registration.module \_fb_registration_extract_fb_fields()

1 call to _fb_registration_extract_fb_fields()

fb_registration_form_alter in contrib/fb_registration.module

Implements hook_form_alter().

File

contrib/fb_registration.module, line 137

http://developers.facebook.com/docs/user_registration

Code

function _fb_registration_extract_fb_fields(&$fb_fields, &$form) {
  foreach (element_children($form) as $key) {
    $field = NULL;
    if (isset($form[$key]['#fb_registration_field'])) {
      if (is_string($form[$key]['#fb_registration_field'])) {

        // This field is a "built in field".
        $field = array(
          'name' => $form[$key]['#fb_registration_field'],
        );
      }
      elseif (is_array($form[$key]['#fb_registration_field'])) {
        $field = $form[$key]['#fb_registration_field'];
      }
    }
    else {

      // #fb_registration_field not specified, fallback to the following
      // code, which translates some drupal form elements into facebook
      // fields.
      if (!isset($form[$key]['#type'])) {
        _fb_registration_extract_fb_fields($fb_fields, $form[$key]);
      }
      elseif ($form[$key]['#type'] == 'fieldset') {
        _fb_registration_extract_fb_fields($fb_fields, $form[$key]);
        $form[$key] = NULL;

        // So the (now empty?) fieldset will not be rendered.
      }
      elseif ($form[$key]['#type'] == 'submit') {

        // We have to use the register button provided by facebook.
        $form[$key] = NULL;
      }
      elseif ($form[$key]['#type'] == 'textfield') {
        $field = array(
          'name' => $key,
          'type' => 'text',
          'description' => $form[$key]['#title'],
        );
      }
      elseif ($form[$key]['#type'] == 'textarea') {

        // Facebook does not offer multi-line text area.  Use single line instead.
        $field = array(
          'name' => $key,
          'type' => 'text',
          'description' => $form[$key]['#title'],
        );
      }
      elseif ($form[$key]['#type'] == 'checkbox') {
        $field = array(
          'name' => $key,
          'type' => 'checkbox',
          'description' => $form[$key]['#title'],
          'default' => isset($form[$key]['#default_value']) ? $form[$key]['#default_value'] : NULL,
        );
      }
      elseif ($form[$key]['#type'] == 'select') {
        $field = array(
          'name' => $key,
          'type' => 'select',
          'description' => $form[$key]['#title'],
          'options' => $form[$key]['#options'],
          'default' => $form[$key]['#default_value'],
        );
      }

      // @TODO do something intelligent with unknown element types.
    }
    if (count($field)) {

      // Use the facebook field...
      $fb_fields[] = $field;

      // and not the drupal field.
      $form[$key] = NULL;
    }
  }
}