Drupal modules for browsing and managing Fedora-based digital repositories.
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<?php
/**
* @file
* CollectionManagement.inc
* A set of useful functions to help with collection management
*/
/**
* returns content models associated with all objects in a collection
* @param string $pid
* @return array
*/
function get_represented_content_models($pid) {
module_load_include('inc', 'islandora', 'RestConnection');
$rest_connection = new RestConnection();
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
$query = "select \$model \$title from <#ri>
where (\$object <info:fedora/fedora-system:def/relations-external#isMemberOf> <info:fedora/$pid>
or \$object <info:fedora/fedora-system:def/relations-external#isMemberOfCollection> <info:fedora/$pid>)
and \$object <info:fedora/fedora-system:def/model#hasModel> \$model
and \$object <dc:title> \$title";
$model_pids = $rest_connection->repository->ri->itqlQuery($query, 'unlimited', '0');
$represented_models = array();
foreach ($model_pids as $model_pid) {
if ($model_pid['model']['value'] && $model_pid['model']['value'] != 'fedora-system:FedoraObject-3.0') {
try {
$fedora_object = new FedoraObject($model_pid['model']['value'], $rest_connection->repository);
$content_model_title = $fedora_object->label;
$represented_models[$model_pid['model']['value']] = $model_pid['model']['value'] . ' ~ ' . $content_model_title;
}
catch (RepositoryException $e) {}
}
}
return $represented_models;
}
function get_child_collections($collection_pid) {
module_load_include('inc', 'islandora', 'RestConnection');
$rest_connection = new RestConnection();
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
$query = <<<EOD
select \$object from <#ri>
where \$object <info:fedora/fedora-system:def/model#hasModel> <info:fedora/islandora:collectionCModel>
and \$object <info:fedora/fedora-system:def/relations-external#isMemberOfCollection> <info:fedora/$collection_pid>
EOD;
$lines = $rest_connection->repository->ri->itqlQuery($query, 'unlimited', '0');
$collection_pids = array_values(array_filter($lines));
return $collection_pids;
}
function islandora_collections_get_collection_from_pid($pid) {
module_load_include('inc', 'islandora', 'RestConnection');
$rest_connection = new RestConnection();
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
$query = 'select $parent from <#ri>
where ($object <fedora-rels-ext:isMemberOf> $parent
or $object <fedora-rels-ext:isMemberOfCollection> $parent)
and $object <dc:identifier> \'' . $pid . '\'
order by $object';
$object_pids = $rest_connection->repository->ri->itqlQuery($query, 'unlimited', '0');
$object_pids = array_values(array_filter($object_pids));
return $object_pids;
}
/**
* Returns an array of pids that match the query contained in the collection
* object's QUERY datastream or in the suppled $query parameter.
* @param <type> $collection_pid
* @param <type> $query
* @param <type> $query_format R
*/
function get_related_items_as_array($collection_pid, $relationship = array('isMemberOfCollection'), $limit = 10000, $offset = 0, $active_objects_only = TRUE, $cmodel = NULL, $orderby = '$title') {
module_load_include('inc', 'islandora', 'RestConnection');
$rest_connection = new RestConnection();
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
global $user;
// Not sure if this is necessary given that we should never be able to delete objects in a namespace that we don't have access to.
// if (!fedora_repository_access('view fedora repository', $collection_pid['object']['value'])) {
// drupal_set_message(t("You do not have access to Fedora objects within the attempted namespace or access to Fedora denied."), 'error');
// return array();
// }
$query_string = 'select $object $title $content from <#ri>
where ($object <fedora-model:label> $title
and $object <fedora-model:hasModel> $content
and (';
if (is_array($relationship)) {
foreach ($relationship as $rel) {
$query_string .= '$object <fedora-rels-ext:' . $rel . '> <info:fedora/' . $collection_pid . '>';
if (next($relationship)) {
$query_string .= ' OR ';
}
}
}
elseif (is_string($relationship)) {
$query_string .= '$object <fedora-rels-ext:' . $relationship . '> <info:fedora/' . $collection_pid . '>';
}
else {
return '';
}
$query_string .= ') ';
$query_string .= $active_objects_only ? 'and $object <fedora-model:state> <info:fedora/fedora-system:def/model#Active>' : '';
if ($cmodel) {
$query_string .= ' and $content <mulgara:is> <info:fedora/' . $cmodel . '>';
}
$query_string .= ')
minus $content <mulgara:is> <info:fedora/fedora-system:FedoraObject-3.0>
order by ' . $orderby;
$results = $rest_connection->repository->ri->itqlQuery($query_string, $limit, $offset);
return $results;
}
/**
* determines whether we can see the object or not
* checks PID namespace permissions, and user permissions
* @global type $user
* @param type $op
* @param type $pid
* @return type
*/
function fedora_repository_access($permission, $pid) {
global $user;
$name_space_access = FALSE;
$is_restricted = variable_get('islandora_namespace_restriction_enforced', FALSE);
if (!$is_restricted) {
$name_space_access = TRUE;
}
if ($pid == NULL) {
$pid = variable_get('islandora_repository_pid', 'islandora:root');
}
$name_space_allowed = explode(" ", variable_get('islandora_pids_allowed', 'default: demo: changeme: islandora: ilives: islandora-book: books: newspapers: '));
$pos = NULL;
foreach ($name_space_allowed as $name_space) {
$pos = stripos($pid, $name_space);
if ($pos === 0) {
$name_space_access = TRUE;
}
}
if ($name_space_access) {
$user_access = user_access($permission);
if ($user_access == NULL) {
return FALSE;
}
return $user_access;
}
else {
return FALSE;
}
}
/**
* gets the name of the content models for the specified object
* this now returns an array of pids as in Fedora 3 we can have more then one Cmodel for an object
* @param type $pid
* @param type $include_fedora_system_content_models
* @return array
*/
function get_content_models_list($pid, $include_fedora_system_content_models = FALSE) {
module_load_include('inc', 'islandora', 'RestConnection');
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
$rest_connection = new RestConnection();
$pids = array();
$query = 'select $object from <#ri>
where <info:fedora/' . $pid . '> <fedora-model:hasModel> $object
and $object <fedora-model:state> <info:fedora/fedora-system:def/model#Active>';
$content_models = $rest_connection->repository->ri->itqlQuery($query, 'unlimited', '0');
if (empty($content_models)) {
return $pids;
}
$cmodels = array();
foreach ($content_models as $content_model) {
if (strpos($content_model['object']['uri'], 'fedora-system:FedoraObject-3.0') != FALSE && $include_fedora_system_content_models == FALSE) {
continue;
}
$cmodels[] = substr(strstr($content_model['object']['uri'], '/'), 1);
}
return $cmodels;
}
/**
* Function: get_content_models_as_option_array
*
* Description: Returns an associative array of all available content models in Fedora instance
*
* @return array
*/
function get_content_models_as_option_array() {
module_load_include('inc', 'islandora', 'RestConnection');
$rest_connection = new RestConnection();
require_once 'sites/all/libraries/tuque/RepositoryQuery.php';
$restricted = variable_get('islandora_namespace_restriction_enforced', FALSE);
$allowed_string = variable_get('islandora_pids_allowed', 'default: demo: changeme: islandora:');
$namespaces = explode(':', $allowed_string);
foreach ($namespaces as $namespace) {
if ($namespace) {
$allowed[] = trim($namespace);
}
}
$query = 'select $object $title from <#ri>
where ($object <fedora-model:label> $title
and ($object <fedora-model:hasModel> <info:fedora/fedora-system:ContentModel-3.0>
or $object <fedora-rels-ext:isMemberOfCollection> <info:fedora/islandora:ContentModelsCollection>)
and $object <fedora-model:state> <info:fedora/fedora-system:def/model#Active>)
order by $title';
$list = $rest_connection->repository->ri->itqlQuery($query, 'unlimited', '0');
$options = array();
foreach ($list as $item) { //removes blanks
if ($item) {
$item_namespace = explode(':', $item['object']['value']);
if (!$restricted || in_array($item_namespace[0], $allowed)) {
if (!preg_match('/fedora-system/', $item['object']['value'])) {
$options[$item['object']['value']] = $item['title']['value'] . ' ~ ' . $item['object']['value'];
}
}
}
}
return $options;
}