<?php

/**
 * @file
 * Hooks and callback functions for rules.module integration.
 */

/**
 * Implements hook_menu().
 */
function rpx_rules_menu() {
  $items['rpx/cookie_handler'] = array(
    'title' => 'RPX Rules cookies consumer endpoint',
    'page callback' => 'rpx_rules_cookie_handler',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );

  return $items;
}

/**
 * Menu callback; cookie consumer endpoint for Rules integration.
 *
 * Javascript code sends users here after setting a cookie.
 *
 * @see rpx_rules_page_alter()
 * @see rpx_widgets_comment_view_alter()
 * @see _rpx_share_button()
 */
function rpx_rules_cookie_handler() {
  global $base_url;

  foreach (array('node', 'comment', 'other') as $type) {
    if (_rpx_event_enabled('rpx_social_cookie_set_' . $type) && isset($_COOKIE['Drupal_visitor_rpx_social_' . $type])) {
      user_cookie_delete('rpx_social_' . $type);
      if ($type == 'other') {
        module_invoke_all('rpx_social_cookie_set', $type);
      }
      else {
        $eid = $_COOKIE['Drupal_visitor_rpx_social_' . $type];
        if (is_numeric($eid) && $entities = entity_load($type, array($eid))) {
          module_invoke_all('rpx_social_cookie_set', $type, $entities[$eid]);
        }
      }
    }
  }
  // Redirect user to the original page.
  $dest = drupal_get_destination();
  $dest = substr($dest['destination'], strlen($base_url) + 1);
  $_GET['destination'] = $dest;
  drupal_goto();
}

/**
 * Implements hook_rules_rpx_social_cookie_set().
 */
function rpx_rules_rpx_social_cookie_set($type, $entity = NULL) {
  rules_invoke_event('rpx_social_cookie_set_' . $type, $entity);
}

/**
 * Implements hook_rules_rpx_account().
 */
function rpx_rules_rpx_linked_account($op, $account) {
  switch ($op) {
    case 'added':
      $event = 'rpx_account_add';
      break;

    case 'deleted':
      $event = 'rpx_account_delete';
      break;
  }

  // Convert to an object.
  $account = (object) $account;

  // Invoke rules event.
  rules_invoke_event($event, $account);
}

/**
 * Implements hook_page_alter().
 */
function rpx_rules_page_alter(&$page) {
  // Check if we should launch the widget. If overlay is enabled don't do
  // anything, as the page will be reloaded again.
  if (!isset($_SESSION['rpx_action_launch_social_data']) ||
      function_exists('overlay_get_mode') && overlay_get_mode() == 'child') {

    return;
  }

  // Attach the social javascript and pass the arguments to it.
  rpx_js_social();
  $settings['rpx']['atonce']['post'] = $_SESSION['rpx_action_launch_social_data'];
  // Sharing cookie info (used in Rules integration).
  if (_rpx_event_enabled('rpx_social_cookie_set_other')) {
    // For some reason this plugin is not added for Chrome (and maybe others).
    drupal_add_library('system', 'jquery.cookie');

    $settings['rpx']['atonce']['cookie'] = array(
      'type' => 'other',
      'id' => 'none',
    );
  }

  drupal_add_js($settings, 'setting');

  // We only want to launch it once.
  unset($_SESSION['rpx_action_launch_social_data']);
}