<?php

// $Id: userpoints_rules.module,v 1.1.4.3 2011-01-30 17:44:26 berdir Exp $

/**
 * @file
 * Rules integration for the user points module.
 */

/**
 * Implements hook_userpoints().
 */
function userpoints_rules_userpoints($op, &$params = array()) {
  // Transactions without points are not passed to rules for now.
  if (!is_array($params) || !isset($params['points'])) {
    return;
  }


  $event = '';
  switch ($op) {
    case 'points after':
      $event = 'userpoints_event_points_awarded_after';
      break;

    case 'points before':
      $event = 'userpoints_event_points_awarded_before';
      break;
  }

  try {

    if (!empty($event)) {
      // Convert to an object.
      $userpoints_transaction = (object) $params;

      // Provide uid as wrapped user entity.
      $userpoints_transaction->user = entity_metadata_wrapper('user', $userpoints_transaction->uid);

      $userpoints_transaction->entity = NULL;
      if (!empty($userpoints_transaction->entity_type) && !empty($userpoints_transaction->entity_id)) {
        // Make entity available as lazy loading wrapper
        $userpoints_transaction->entity = entity_metadata_wrapper($userpoints_transaction->entity_type, $userpoints_transaction->entity_id);
      }
      // Invoke rules event.
      rules_invoke_event($event, $userpoints_transaction);

      // Convert back to keep any changes to the properties.
      $params = (array) $userpoints_transaction;
      $params['uid'] = $userpoints_transaction->user->getIdentifier();
      if ($userpoints_transaction->entity) {
        $params['entity_type'] = $userpoints_transaction->entity->type();
        $params['entity_id'] = $userpoints_transaction->entity->getIdentifier();
      }
      unset($params['entity']);
    }
  } catch (EntityMetadataWrapperException $e) {
    // The referenced entity does not exist.
    // @todo: Find a way to handle this more gracefully.
  }
  unset($params['entity']);
  unset($params['user']);
}