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/**
 * Implements hook_action_info().
 */
function spaint_user_action_info() {
  return array(
    'spaint_user_modify_action' => array(
      'type' => 'entity',
      'label' => t('Remind user about Application'),
      'behavior' => array('changes_property'),
      'configurable' => FALSE,
      'vbo_configurable' => TRUE,
      'triggers' => array('any'),
    ),
  );
}

function spaint_user_modify_action_form($settings, $entityType) {
  $form['message'] = array(
    '#title' => t('Enter message'),
    '#type' => 'textfield',
    '#description' => t('Enter a message to send to users'),
    '#default_value' => t('Don\'t forget about us'),
  );

  return $form;
}

function spaint_user_modify_action_submit($form, &$form_state) {
  $message = $form_state['values']['message'];
  $operations = array();
  foreach ($form_state['selection'] as $uid) {
    $operations[] = array('spaint_user_sent_push', array($uid, $message));
  }
  $batch = array(
    'operations' => $operations,
    'finished' => 'spaint_user_batch_sent_push_finished',
    'title' => t('Changing status...'),
    'init_message' => t('Initializing.'),
    'progress_message' => t('Completed @current of @total.'),
    'error_message' => t('An error has occurred.'),
  );

  batch_set($batch);
}

/**
 * Callback change status promocodes. Calling inner batch.
 */
function spaint_user_sent_push($uid, $message) {
  $query = db_select('push_notifications_tokens', 't');
  $query->fields('t', array('token'));
  $query->condition('t.uid', $uid);
  $result = $query->execute()->fetchAll();

  if (!empty($result)) {
    $payload['alert'] = "{\"header\":\"Silk Paints\",\"message\":\"$message\"}";
    push_notifications_gcm_send_message(array(reset($result)->token), $payload);
  }
}