Building a custom boost cache relationship

Code for views

function boost_views_pre_render(&$view) {
  // return if not a view, page not going to be cached, or if database turned off
  if (is_null($view) || !$GLOBALS['_boost_cache_this'] || BOOST_NO_DATABASE) {
    return;
  }

  // return if view doesn't belong in the set of views to search
  $views = boost_views_get_valid_array();
  $hash = $view->name . ' - ' . $view->current_display;
  if (!array_key_exists($hash, $views)) {
    return;
  }

  foreach ($view->result as $item) {
    // skip if nid is not a number
    if (!is_numeric($item->nid)) {
      continue;
    }

    $node = boost_node_get_basics($item->nid);
    // skip if node type is not set
    if (!isset($node->type)) {
      continue;
    }
    // set data
    $relationship = array(
      'child_page_callback' => 'node',
      'child_page_type' => $node->type,
      'child_page_id' => $item->nid,
    );
    if (BOOST_VERBOSE >= 9) {
      $relationship['debug'] = array(
        'view-name' => $view->name,
        'view-display' => $view->current_display,
        'node-path' => $node->path,
      );
    }
    // send to global
    $GLOBALS['_boost_relationships'][] = $relationship;
  }
}

Code for panels

function boost_ctools_render_alter($info, $page, $args, $contexts, $task, $subtask, $handler) {
  // return if page not going to be cached or if database turned off
  if (!$GLOBALS['_boost_cache_this'] || BOOST_NO_DATABASE) {
    return;
  }

  foreach ($handler->conf['display']->context as $context) {
    if ($context->type == 'node') {
      $node = $context->data;
      // skip if node type is not set
      if (!isset($node->type)) {
        continue;
      }
      // set data
      $relationship = array(
        'child_page_callback' => 'node',
        'child_page_type' => $node->type,
        'child_page_id' => $node->nid,
      );
      if (BOOST_VERBOSE >= 9) {
        $relationship['debug'] = array(
          'panel-task' => $handler->task,
          'panel-subtask' => $handler->subtask,
          'node-path' => $node->path,
        );
      }
      // send to global
      $GLOBALS['_boost_relationships'][] = $relationship;
    }
  }
}

Hook menu for this page. How it works is the first number is a node & the second number is the delta of the CCK item.

/**
 * Implementation of hook_menu().
 */
  $items['coupon/%/%'] = array(
    'title' => 'Coupon',
    'description' => 'Display one coupon from the CCK field',
    'page callback' => 'business_profiles_coupon_display',
    'access arguments' => array('access content'),
    'file' => 'business_profiles.coupons.inc',
    'type' => MENU_CALLBACK,
    'page arguments' => array(1, 2),
  );

Page is a custom rendered html page (no theme) that is used in a lightbox popup. What is happening is the node gets updated but the coupon doesn't get flushed from the cache. What I need to do is create a relationship between this custom page and the node.

inside business_profiles_coupon_display right at the end of the function I call the newly crated business_profiles_coupon_set_boost_relationship() function.

function business_profiles_coupon_display($nid, $cck_id = 0) {
...
  echo $output;

  // Set boost relationship
  business_profiles_coupon_set_boost_relationship(&$node, $biz_data);
}

/**
 * Set the boost cache relationship.
 *
 * This sets up a relationship between the coupon path and the node object.
 *
 * @param $node
 *   node object
 * @param $coupon_title
 *   title of the coupon; used for debugging purposes. 
 */
function business_profiles_coupon_set_boost_relationship(&$node, $coupon_title) {
  // Return if page not going to be cached or if database turned off.
  if (!$GLOBALS['_boost_cache_this'] || BOOST_NO_DATABASE) {
    return;
  }

  // set data
  $relationship = array(
    'child_page_callback' => 'node',
    'child_page_type' => $node->type,
    'child_page_id' => $node->nid,
  );
  if (BOOST_VERBOSE >= 9) {
    $relationship['debug'] = array(
      'coupon-title' => $coupon_title,
      'node-path' => $node->path,
    );
  }
  // send to global
  $GLOBALS['_boost_relationships'][] = $relationship;
}