You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
3.6 KiB
104 lines
3.6 KiB
<?php |
|
|
|
/** |
|
* @file |
|
* This file contains functions to create breadcrumbs on Islandora object pages. |
|
*/ |
|
|
|
/** |
|
* Get an array of links to be passed to drupal_set_breadcrumb(). |
|
* |
|
* This is used for generating the bread-crumbs for the view object page. |
|
* |
|
* Each link in the bread-crumbs represents a member of the given objects |
|
* ancestry which is identified by any of the following RELS-EXT terms |
|
* (isMemberOf,isMemberOfCollection,isPartOf). |
|
* |
|
* @param FedoraObject $object |
|
* An object whose ancestry will be mapped to bread-crumbs. |
|
* |
|
* @see drupal_set_breadcrumb() |
|
* |
|
* @return array |
|
* Array of links, starting with most distant ancestor proceeding up to but |
|
* not including the given object. For use in the function |
|
* drupal_set_breadcrumb(). |
|
*/ |
|
function islandora_get_breadcrumbs($object) { |
|
$breadcrumbs = array(); |
|
islandora_get_breadcrumbs_recursive($object->id, $breadcrumbs, $object->repository); |
|
if (isset($breadcrumbs[0])) { |
|
// Remove the actual object. |
|
unset($breadcrumbs[0]); |
|
} |
|
$breadcrumbs = array_reverse($breadcrumbs); |
|
return $breadcrumbs; |
|
} |
|
|
|
/** |
|
* Builds an array of drupal links for use in breadcrumbs. |
|
* |
|
* @todo Make fully recursive... |
|
* |
|
* @todo Could use some clean up, can't be called multiple times safely due to |
|
* the use of static variables. |
|
* |
|
* @param string $pid |
|
* THe object id whose parent will be fetched for the next link. |
|
* @param array $breadcrumbs |
|
* The list of existing bread-crumb links in reverse order. |
|
* @param FedoraRepository $repository |
|
* The fedora repository. |
|
*/ |
|
function islandora_get_breadcrumbs_recursive($pid, array &$breadcrumbs, FedoraRepository $repository) { |
|
// Before executing the query, we have a base case of accessing the top-level |
|
// collection. |
|
static $max_level = 10; |
|
static $level = -1; |
|
|
|
if (count($breadcrumbs) === 0) { |
|
$level = $max_level; |
|
} |
|
|
|
$root = variable_get('islandora_repository_pid', 'islandora:root'); |
|
if ($pid == $root) { |
|
$breadcrumbs[] = l(menu_get_active_title(), 'islandora'); |
|
$breadcrumbs[] = l(t('Home'), '<front>'); |
|
} |
|
else { |
|
$query_string = 'select $parentObject $title $content from <#ri> |
|
where ( |
|
<info:fedora/' . $pid . '> <fedora-model:label> $title |
|
and $parentObject <fedora-model:hasModel> $content |
|
and ( |
|
<info:fedora/' . $pid . '> <fedora-rels-ext:isMemberOfCollection> $parentObject |
|
or <info:fedora/' . $pid . '> <fedora-rels-ext:isMemberOf> $parentObject |
|
or <info:fedora/' . $pid . '> <fedora-rels-ext:isPartOf> $parentObject |
|
) |
|
and $parentObject <fedora-model:state> <info:fedora/fedora-system:def/model#Active> |
|
) |
|
minus $content <mulgara:is> <info:fedora/fedora-system:FedoraObject-3.0> |
|
order by $title desc'; |
|
$results = $repository->ri->itqlQuery($query_string); |
|
|
|
if (count($results) > 0 && $level > 0) { |
|
$parent = $results[0]['parentObject']['value']; |
|
$this_title = $results[0]['title']['value']; |
|
|
|
if (empty($this_title)) { |
|
$this_title = t('-'); |
|
} |
|
|
|
$breadcrumbs[] = l($this_title, "islandora/object/$pid"); |
|
|
|
$level--; |
|
islandora_get_breadcrumbs_recursive($parent, $breadcrumbs, $repository); |
|
} |
|
else { |
|
// Add an non-link, as we don't know how to get back to the root. |
|
$breadcrumbs[] = '...'; |
|
// And render the last two links and break (on the next pass). |
|
islandora_get_breadcrumbs_recursive($root, $breadcrumbs, $repository); |
|
} |
|
} |
|
}
|
|
|