Better handling of episode beginnings

[amandavisconti]

Instead of separate "episode title" pages, hide these book parent pages and find some other way of signaling beginning of new chapter on appropriate pages.

/**

• This preprocess hook avoids the top-level page of a book to be displayed.

• Instead, if the top-level book is being requested, user is redirected to

• the first child page.

• This only occurs if user does not have outline permission.

• Also on the first child page, prev link to the top-level page is removed.
  */
  function radix_preprocess_book_navigation(&$variables) {
  template_preprocess_book_navigation($variables);

  // redirect to first child for all users
  if($variables['current_depth']==1) {
  $first_child_link = book_next($variables['book_link']);
  if($first_child_link['link_path']) {
  drupal_goto($first_child_link['link_path'],array(),301);
  }
  }
  // Remove prev link for first child
  // and remove up link for first level children
  if($variables['current_depth']==2) {
  if($variables['parent_url'] == $variables['prev_url']) $variables['prev_url']='';
  $variables['parent_url']='';
  }
  }