Radioactivity with Panels contexts

isu_panel_layouts.module

/**
 * Implements hook_ctools_render_alter().
 */
function isu_panel_layouts_ctools_render_alter(&$info, &$page, &$context) {

  if (!empty($context['contexts'])) {

    // I don't know why this is necessary, but just looping over the contexts
    // array is throwing an unknown error.
    $context_keys = array_keys($context['contexts']);

    foreach ($context_keys as $key) {

      $radioactivity_fields = $radioactivity_profiles = array();

      // TODO: Get this from somewhere.
      $lang = LANGUAGE_NONE;

      $entity_type = $context['contexts'][$key]->get_keyword();
      $entity_info = entity_get_info($entity_type);

      // Find out if this context represents an entity page replacement. In
      // some cases it might be useful to only allow panels views contexts
      // to register a radioactivity view if they are full page replacements
      // for ordinary entity pages eg. node/%node.
      $is_entity_replacement = radioactivity_is_entity_page_replacement($entity_info['path'], arg());

      $entity = $context['contexts'][$key]->data;
      $bundle = $entity->type;

      $fields = field_info_instances($entity_type, $bundle);

      foreach ($fields as $field) {

        if ($field['widget']['type'] == 'radioactivity_basic_widget') {

          $radioactivity_profile = radioactivity_decay_profile_load($field['settings']['profile']);

          dpm($is_entity_replacement);

          if ($is_entity_replacement == TRUE) {

            _radioactivity_update_energy(
              $entity_type,
              $bundle,
              $field['field_name'],
              $lang,
              $entity->$entity_info['entity keys']['id'],
              $radioactivity_profile->granularity,
              time(),
              FALSE
            );

          }

        }

      }

    }

  }

}

/**
 * Helper to determine if this panel view is an override of an ordinary entity
 * view page.
 *
 * @param $path
 *   The path attribute as retrieved from the entity info.
 * @param $args
 *   The url arguments.
 *
 * @return
 *   Boolean whether it's a replacement page or not.
 */
function radioactivity_is_entity_page_replacement($entity_path, $args) {

  $replacement = TRUE;

  // Mung $path to break it into path components.
  $entity_path_args = explode('/', $entity_path);

  foreach ($entity_path_args as $key => $entity_path_arg) {

    // Check for unmatching path args.
    if ($entity_path_arg != $args[$key]) {

      // Make sure entity path arg isn't an entity load arg AND url arg isn't
      // numeric.
      if (drupal_substr($entity_path_arg, 0, 1) != '%' || !is_numeric($args[$key])) {

        $replacement = FALSE;

      }

    }

  }

  return $replacement;

}

field_language($entity_type, $entity, $field_name = NULL, $langcode = NULL)

http://api.drupal.org/api/drupal/modules%21field%21field.multilingual.inc/function/field_language/7

Returns language for a specified field, taking into account user language, maybe this will work for line 47.

Nice snippet.