author_from_node.inc

<?php
/**
 * @file
 * Provides relationship to relate the Author from a piece of content (node).
 */
class LayoutRelationshipAuthorFromNode extends LayoutRelationship {

  /**
   * @var bool;
   */
  public $storage = FALSE;

  /**
   * Get the context from this relationship.
   *
   * @param LayoutContext $source_context;
   *   The source context on which this relationship is based.
   *
   * @return LayoutContext|FALSE
   *   The additional context added once this relationship is joined.
   */
  function getContext(LayoutContext $source_context) {
    $account = NULL;
    if (isset($source_context->data->uid)) {
      // Load the user that is the author of the node.
      $uid = $source_context->data->uid;
      $account = user_load($uid);
    }
    $user_context = layout_create_context('user', array(
      'position' => $source_context->position,
      'label' => $this->getAdminSummary(),
    ));
    $user_context->setData($account);

    return $user_context;
  }

  /**
   * Return a summary for this relationship.
   */
  function getAdminSummary() {
    if (!empty($this->settings['context_parent'])) {
      list($label, $value) = explode(':', $this->settings['context_parent']);
      if ($label == 'position') {
        return t('Author of content in position @position', array('@position' => $value+1));
      }
      else {
        return t('Author of content @id', array('@id' => $value));
      }
    }
    return t('Author of content');
  }

}