<?php
// $Id$

/**
 * @file
 * A demonstration module of custom code for http://drupaldojo.com/lesson/40
 *
 * This module should not be used on a live site. It's example code only.
 */

/**
 * Implementation of hook_action_info().
 * 
 * Defines the read_book action.
 */
function dojo_action_info() {
  return array(
    'dojo_read_book_action' => array(
      'hooks' => array(
        'go_to_sleep' => array('run'),
      ),
      'description' => t('Read books to young children'),
      'configurable' => FALSE,
      'type' => 'dojo',
    ),
  );
}

/**
 * The read_book action that is called by dojo_action_info().
 * 
 * Reads a book.
 */
function dojo_read_book_action() {
  // Anything you want accomplished can go in here.
  drupal_set_message(t('Reading book'));
}

/**
 * Implementation of hook_hook_info().
 * 
 * Defines the go_to_sleep trigger (or at least it should).
 */
function dojo_hook_info() {
  return array(
    'dojo' => array(
      'go_to_sleep' => array(
        'run' => array(
          'runs when' => t('Drupal wants to go to sleep'),
        ),
      ),
    ),
  );
}

function dojo_exit() {
  module_invoke_all('dojo');
}

function trigger_dojo() {
  // _trigger_get_hook_aids is defined in trigger.module
  $aids = _trigger_get_hook_aids('dojo', 'run');
  $context = array(
    'hook' => 'dojo',
    'op' => '',
  );
  // Dojo does not act on any specific object.
  $object = NULL;
  actions_do(array_keys($aids), $object, $context);
}

/**
 * Implementation of hook_footer().
 * 
 * Triggers our alias, the hook_go_to_sleep
 */
function dojo_footer() {
  // Invoke the hook
  module_invoke_all('go_to_sleep');
}

/**
 * Implementation of hook_go_to_sleep().
 */
function dojo_go_to_sleep() {
  // Get all actions from this trigger
  $actions = _trigger_get_hook_aids('go_to_sleep');
  // Initialize a dummy object
  $obj = (object) array();
  // Do the actions on the dummy object
  actions_do($actions, $obj);
}