rules_modal.module

<?php

/**
* Implements hook_menu
*/
function rules_modal_menu() {
  $items['rules_modal/%'] = array(
    'page callback' => 'rules_modal_form_submit_ajax',
    'page arguments' => array(1),
    'access callback' => TRUE,
  );
  return $items;
}


/**
* Implements hook_init()
*/
function rules_modal_init() {
 ctools_include('modal');
 ctools_include('ajax');
}

/**
* Implements hook_rules_event_info
*/
function rules_modal_rules_event_info() {
  $items = array(
    'rules_modal_form_submit' => array(
      'label' => t('Form Submission'),
      'group' => t('Rules Modal'),
      'variables' => array(
        'form_id' => array(
          'label' => t('Form Id'),
          'type' => 'text'
        )
      )
    )
  );

  return $items;
}

/**
* Implements hook_rules_action_info
*/
function rules_modal_rules_action_info() {
  return array(
    'rules_modal' => array(
      'label' => t('Display a Modal'),
      'parameter' => array(
        'modal_callback' => array(
          'type' => 'text',
          'label' => t('Select A Modal'),
          'description' => t('Select the modal to display when this action runs.'),
          'options list' => 'rules_modal_callback_options',
          'restriction' => 'input',
        ),
      ),
      'group' => t('Rules Modal'),
      'base' => 'rules_modal',
      'callbacks' => array( ),
    ),
  );
}

function rules_modal($modal_callback = '') {
  drupal_add_js('Drupal.behaviors.rules_modal_display.show("'. $modal_callback .'");', 'inline');
}

function rules_modal_callback_options() {
  $options = array( );
  $callbacks = module_invoke_all('rules_modal_info');
  foreach($callbacks as $id => $callback) {
    $options[$callback['path']] = $callback['title'];
  }
  return $options;
}

/**
* Responds to a form submit, and checks first if there is some sort of action that needs to fire.
*/
function rules_modal_form_submit_ajax($form_id, $form_data = NULL) {
  $form_id = str_replace('-', '_', $form_id);
  $form_data = $_POST['data'];
  $callbacks = module_invoke_all('rules_modal_form_response', $form_id, $form_data);
  // trigger the event, we need to return the resulting response in a
  // sensible json data packet.
  print drupal_json_output(
    array(
      'continue' => TRUE,
    )
  );
  exit();
}