@ -138,7 +138,7 @@ class ObjectHelper {
curl_setopt($ch, CURLOPT_USERPWD, "$fedoraUser:$fedoraPass");
// There seems to be a bug in Fedora 3.1's REST authentication, removing this line fixes the authorization denied error.
// curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0 ); // return into a variable
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE ); // return into a variable
curl_setopt($ch, CURLOPT_URL, $url);
@ -150,7 +150,6 @@ class ObjectHelper {
fclose($fp);
}
else {
header("Content-type: $mimeType");
if ($contentSize > 0) {
header("Content-length: $contentSize");
@ -181,13 +180,39 @@ class ObjectHelper {
header('Content-Disposition: attachment; filename="' . $suggestedFileName . '"');
}
if ((isset($user) & & $user->uid != 0) || $forceSoap || isset($_SERVER['HTTPS'])) {
curl_exec($ch);
curl_setopt($ch, CURLOPT_NOBODY, TRUE);
$curl_out = curl_exec($ch);
if ($curl_out !== FALSE) {
$info = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
//dd($info, 'effective URL');
if ($url !== $info) { //Handle redirect streams (the final URL is not the same as the Fedora URL)
//Add the parameters passed to Drupal, leaving out the 'q'
$query = array();
parse_str($_SERVER['QUERY_STRING'], $query);
if (isset($query['q'])) {
unset($query['q']);
}
header('HTTP/1.1 307 Moved Temporarily');
header('Location: ' . $info . '?' . http_build_query($query)); //Fedora seems to discard the query portion.
}
elseif ((isset($user) & & $user->uid != 0) || $forceSoap || isset($_SERVER['HTTPS'])) { //If not anonymous, soap is force or we're using HTTPS
//Have the webserver mediate the transfer (download and restream)
curl_setopt($ch, CURLOPT_NOBODY, FALSE);
curl_setopt($ch, CURLOPT_HTTPGET, TRUE); //CURLOPT_NOBODY sets it to 'HEAD'
$toReturn = curl_exec($ch);
echo $toReturn;
}
else {
header('Location: ' . $url);
}
}
else {
//Curl error...
}
}
curl_close($ch);
}
else {
@ -288,36 +313,42 @@ class ObjectHelper {
function create_link_for_ds($pid, $dataStreamValue) {
global $base_url;
$path = drupal_get_path('module', 'fedora_repository');
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
require_once($path . '/api/fedora_item.inc');
$item = new Fedora_Item($pid);
$purge_image = ' ';
if (user_access(ObjectHelper :: $PURGE_FEDORA_OBJECTSANDSTREAMS)) {
$allow = TRUE;
if (module_exists('fedora_fesl')) {
$allow = fedora_fesl_check_roles($pid, 'write');
}
if ($allow) {
$purgeImage = '< a title = "purge datastream ' . $dataStreamValue->label . '" href = "' . $ base_url . ' / fedora / repository / purgeStream / ' .
$pid . '/' . $dataStreamValue->ID . '/' . $dataStreamValue->label . '">< img src = "' . $ base_url . ' / ' . $ path .
'/images/purge.gif" alt="purge datastream" />< / a > ';
$purge_text = t('Purge datastream "@label"', array('@label' => $dataStreamValue->label));
$purge_path = "fedora/repository/purgeStream/$pid/{$dataStreamValue->ID}/{$dataStreamValue->label}";
$purge_image = l(theme('image', "$path/images/purge.gif", $purge_text, $purge_text, NULL, FALSE), $purge_path, array(
'html' => TRUE,
));
}
}
else {
$purgeI mage = ' ';
$purge_i mage = ' ';
}
$fullPath = base_path() . $path;
// Add an icon to replace a datastream
// @TODO Note: using l(theme_image(..), ...); for these image links (and other links) may remove the need to have clean urls enabled.
$replaceI mage = ' ';
$replace_i mage = ' ';
if (user_access(ObjectHelper :: $ADD_FEDORA_STREAMS)) {
$allow = TRUE;
if (module_exists('fedora_fesl')) {
$allow = fedora_fesl_check_roles($pid, 'write');
}
if ($allow) {
$replaceImage = '< a title = "' . t(" Replace datastream " ) . " " . $ dataStreamValue- > label . '" href="' . $base_url . '/fedora/repository/replaceStream/' . $pid . '/' . $dataStreamValue->ID . '/' . $dataStreamValue->label . '">< img src = "' . $base_url . '/' . $path . '/images/replace.png" alt = "replace datastream" / > < / a > ';
$replace_text = t('Replace datastream "@label"', array('@label' => $dataStreamValue->label));
$replace_path = "fedora/repository/replaceStream/$pid/{$dataStreamValue->ID}/{$dataStreamValue->label}";
$replace_image = l(theme('image', "$path/images/replace.png", $replace_text, $replace_text, NULL, FALSE), $replace_path, array(
'html' => TRUE,
));
}
}
@ -325,11 +356,15 @@ class ObjectHelper {
$id = $dataStreamValue->ID;
$label = $dataStreamValue->label;
$label = str_replace("_", " ", $label);
$label_deslashed = preg_replace('/\//i', '${1}_', $label); // Necessary to handle the case of Datastream labels that contain slashes. Ugh.
$mimeType = $dataStreamValue->MIMEType;
$view = '< a href = "' . $ base_url . ' / fedora / repository / ' . drupal_urlencode ( $ pid ) . ' / ' . $ id . ' / ' . drupal_urlencode ( $ label ) .
'" target="_blank" >' . t('View') . '< / a > ';
$action = "$base_url/fedora/repository/object_download/" . drupal_urlencode($pid) . '/' . $id . '/' . drupal_urlencode(preg_replace('/\//i', '${1}_', $label)); // Necessary to handle the case of Datastream labels that contain slashes. Ugh.
$view = l(t('View'), "fedora/repository/$pid/$id/$label_deslashed", array(
'attributes' => array(
'target' => '_blank',
),
));
$action = url("fedora/repository/object_download/$pid/$id/$label_deslashed");
$downloadVersion = '< form method = "GET" action = "' . $action . '" > < input type = "submit" value = "' . t('Download') . '" > < / form > ';
if (user_access(ObjectHelper::$EDIT_FEDORA_METADATA)) {
$versions = $item->get_datastream_history($id);
@ -344,8 +379,23 @@ class ObjectHelper {
}
}
$content .= "< tr > < td > $label< / td > < td > $view< / td > < td > $downloadVersion< / td > < td > $mimeType< / td > < td > $replaceImage $purgeImage< / td > < / tr > \n";
return $content;
return array(
array(
'data' => $label,
),
array(
'data' => $view,
),
array(
'data' => $downloadVersion,
),
array(
'data' => $mimeType
),
array(
'data' => $replace_image . $purge_image,
),
);
}
/**
@ -362,33 +412,35 @@ class ObjectHelper {
$dsid = array_key_exists('QDC', $item->get_datastreams_list_as_array()) ? 'QDC' : 'DC';
$xmlstr = $item->get_datastream_dissemination($dsid);
if (empty($xmlstr)) {
return '';
}
try {
$proc = new XsltProcessor();
} catch (Exception $e) {
drupal_set_message($e->getMessage(), 'error');
return;
}
$simplexml = new SimpleXMLElement($xmlstr);
$proc->setParameter('', 'baseUrl', $base_url);
$proc->setParameter('', 'path', $base_url . '/' . $path);
$input = NULL;
$xsl = new DomDocument();
try {
$xsl->load($path . '/xsl/convertQDC.xsl');
$input = new DomDocument();
$input->loadXML(trim($xmlstr));
} catch (Exception $e) {
watchdog('fedora_repository', "Problem loading XSL file: @e", array('@e' => $e->getMessage()), NULL, WATCHDOG_ERROR);
$headers = array(
array(
'data' => t('Metadata'),
'colspan' => 2,
),
);
$rows = array();
foreach ($simplexml->getNamespaces(TRUE) as $ns) {
foreach ($simplexml->children($ns) as $child) {
$rows[] = array(
array(
'data' => $child->getName(),
'class' => 'dc-tag-name',
),
array(
'data' => (string)$child,
'class' => 'dc-content',
),
);
}
$xsl = $proc->importStylesheet($xsl);
$newdom = $proc->transformToDoc($input);
$output = $newdom->saveHTML();
return $output;
}
return theme('table', $headers, $rows, array('class' => 'dc-table'));
}
/**
@ -407,16 +459,17 @@ class ObjectHelper {
$dsid = array_key_exists('QDC', $ds_list) ? 'QDC' : 'DC';
$path = drupal_get_path('module', 'fedora_repository');
//$baseUrl=substr($baseUrl, 0, (strpos($baseUrl, "/")-1));
if (user_access(ObjectHelper :: $EDIT_FEDORA_METADATA)) {
$allow = TRUE;
if (module_exists('fedora_fesl')) {
$allow = fedora_fesl_check_roles($pid, 'write');
}
if ($allow) {
$output .= '< br / > < a title = "' . t('Edit Meta Data') . '" href = "' . $ base_url . ' / fedora / repository / ' . ' editmetadata / ' . $ pid . ' / ' .
$dsid . '">< img src = "' . $base_url . '/' . $path . '/images/edit.gif" alt = "' . t('Edit Meta Data') . '" / > < / a > ';
$link_image = theme('image', "$path/images/edit.gif", t('Edit Metadata'));
$link = l($link_image, "fedora/repository/editmetadata/$pid", array(
'html' => TRUE,
));
$output .= '< br / > ' . $link;
}
}
return $output;
@ -436,7 +489,7 @@ class ObjectHelper {
*
*/
function get_formatted_datastream_list($object_pid, $contentModels, & $fedoraItem) {
global $fedoraUser, $fedoraPass, $ base_url, $user;
global $base_url, $user;
module_load_include('inc', 'fedora_repository', 'ConnectionHelper');
module_load_include('inc', 'fedora_repository', 'ObjectHelper');
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
@ -448,58 +501,42 @@ class ObjectHelper {
if (user_access(ObjectHelper :: $VIEW_DETAILED_CONTENT_LIST)) {
$availableDataStreamsText = 'Detailed List of Content';
//$metaDataText='Description';
$mainStreamLabel = NULL;
$object = $fedoraItem->get_datastreams_list_as_SimpleXML();
if (!isset($object)) {
drupal_set_message(t("No datastreams available"));
return ' ';
}
$hasOBJStream = NULL;
$hasTNStream = FALSE;
$dataStreamBody = "< br / > < table > \n";
$cmDatastreams = array();
if (variable_get('fedora_object_restrict_datastreams', FALSE) == TRUE & & ($cm = ContentModel::loadFromObject($object_pid)) !== FALSE) {
$cmDatastreams = $cm->listDatastreams();
}
$dataStreamBody .= $this->get_parent_objects_asHTML($object_pid);
$dataStreamBody .= '< tr > < th colspan = "4" > < h3 > ' . t("!text", array('!text' => $availableDataStreamsText)) . '< / h3 > < / th > < / tr > ';
$headers = array(
array(
'data' => $availableDataStreamsText,
'colspan' => 4,
),
);
$DSs = array();
foreach ($object as $datastream) {
foreach ($datastream as $datastreamValue) {
if (variable_get('fedora_object_restrict_datastreams', FALSE) == FALSE || ((isset($user) & & in_array('administrator', $user->roles)) || in_array($datastreamValue->ID, $cmDatastreams))) {
if ($datastreamValue->ID == 'OBJ') {
$hasOBJStream = '1';
$mainStreamLabel = $datastreamValue->label;
$mainStreamLabel = str_replace("_", " ", $mainStreamLabel);
}
if ($datastreamValue->ID == 'TN') {
$hasTNStream = TRUE;
}
//create the links to each datastream
$dataStreamBody . = $this->create_link_for_ds($object_pid, $datastreamValue); //"< tr > < td > < b > $key :< / b > < / td > < td > $value< / td > < / tr > \n" ;
$DSs []= $this->create_link_for_ds($object_pid, $datastreamValue);
}
}
}
$dataStreamBody .= "< / table > \n";
$dataStreamBody = theme('table', $headers, $DSs);
//if they have access let them add a datastream
if (user_access(ObjectHelper :: $ADD_FEDORA_STREAMS)) {
$allow = TRUE;
if (module_exists('fedora_fesl')) {
$allow = fedora_fesl_check_roles($object_pid, 'write');
}
if ($allow) {
if (user_access(ObjectHelper::$ADD_FEDORA_STREAMS) & & //If allowed throw Drupal
((module_exists('fedora_fesl') & & fedora_fesl_check_roles($object_pid, 'write')) || //And allowed throw FESL
!module_exists('fedora_fesl'))) { //Or not using FESL, draw the add datastream form.
$dataStreamBody .= drupal_get_form('add_stream_form', $object_pid);
}
}
$fieldset = array(
'#title' => t("!text", array('!text' => $availableDataStreamsText)),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#value' => $dataStreamBody
);
$dataStreamBody = '< div class = "fedora_detailed_list" > ' . theme('fieldset', $fieldset) . '< / div > ';
return $dataStreamBody;
}
@ -561,7 +598,7 @@ class ObjectHelper {
try {
$sxml = new SimpleXMLElement($content_models);
} catch (exception $e) {
watchdog(t("Fedora_R epository"), "Could not find a parent object for %s", $pid, NULL, WATCHDOG_ERROR);
watchdog(t("fedora_r epository"), "Could not find a parent object for %s", $pid, NULL, WATCHDOG_ERROR);
return $pids;
}
@ -591,55 +628,44 @@ class ObjectHelper {
* @param type $pid
* @return type
*/
function fedora_repository_access($op, $pid) {
global $user;
function fedora_repository_access($op, $pid = NULL, $as_user = NULL) {
$returnValue = FALSE;
$isRestricted = variable_get('fedora_namespace_restriction_enforced', TRUE);
if (!$isRestricted) {
$namespaceAccess = TRUE;
}
if ($pid == NULL) {
$pid = variable_get('fedora_repository_pid', 'islandora:root');
}
$nameSpaceAllowed = explode(" ", variable_get('fedora_pids_allowed', 'default: demo: changeme: islandora: ilives: islandora-book: books: newspapers: '));
$pos = NULL;
foreach ($nameSpaceAllowed as $nameSpace) {
$pos = stripos($pid, $nameSpace);
if ($pos === 0) {
$namespaceAccess = TRUE;
}
}
if ($namespaceAccess) {
$user_access = user_access($op);
if ($user_access == NULL) {
return FALSE;
}
return $user_access;
$isRestricted = variable_get('fedora_namespace_restriction_enforced', TRUE);
$namespace_access = NULL;
if (!$isRestricted) {
$namespace_access = TRUE;
}
else {
return FALSE;
$pid_namespace = substr($pid, 0, strpos($pid, ':') + 1); //Get the namespace (with colon)
$allowed_namespaces = explode(" ", variable_get('fedora_pids_allowed', 'default: demo: changeme: islandora: ilives: islandora-book: books: newspapers: '));
$namespace_access = in_array($pid_namespace, $allowed_namespaces);
}
return ($namespace_access & & user_access($op, $as_user));
}
/**
* internal function
* uses an xsl to parse the sparql xml returned from the ITQL query
*
*
* @deprecated
* This is only used in the fedora/repository/collection path,
* which should probably be nuked.
* @param $content String
*/
function parseContent($content, $pid, $dsId, $collection, $pageNumber = NULL) {
$path = drupal_get_path('module', 'fedora_repository');
global $base_url;
$collection_pid = $pid; //we will be changing the pid later maybe
//module_load_include('php', ''Fedora_Repository'', 'ObjectHelper');
$objectHelper = $this;
$parsedContent = NULL;
$contentModels = $objectHelper ->get_content_models_list($pid);
$contentModels = $this ->get_content_models_list($pid);
$isCollection = FALSE;
//if this is a collection object store the $pid in the session as it will come in handy
//after a purge or ingest to return to the correct collection.
$fedoraItem = NULL;
$datastreams = $this->get_formatted_datastream_list($pid, $contentModels, $fedoraItem);
@ -647,6 +673,9 @@ class ObjectHelper {
if (!empty($contentModels)) {
foreach ($contentModels as $contentModel) {
if ($contentModel == variable_get('fedora_collection_model_pid', 'islandora:collectionCModel')) {
//if this is a collection object store the $pid in the session as it will come in handy
//after a purge or ingest to return to the correct collection.
$_SESSION['fedora_collection'] = $pid;
$isCollection = TRUE;
}
@ -663,8 +692,8 @@ class ObjectHelper {
//show the collections datastreams
if ($results->length > 0 || $isCollection == TRUE) {
// if(strlen($objectList)>22||$contentModel=='Collection'||$contentModel=='Community')//length of empty dom still equals 22 because of < table / > etc
module_load_include('inc', 'Fedora_R epository', 'CollectionPolicy');
$collectionPolicyExists = $objectHelper ->getMimeType($pid, CollectionPolicy::getDefaultDSID());
module_load_include('inc', 'fedora_r epository', 'CollectionPolicy');
$collectionPolicyExists = $this ->getMimeType($pid, CollectionPolicy::getDefaultDSID());
if (user_access(ObjectHelper::$INGEST_FEDORA_OBJECTS) & & $collectionPolicyExists) {
if (!empty($collectionPolicyExists)) {
$allow = TRUE;
@ -673,9 +702,11 @@ class ObjectHelper {
}
if ($allow) {
// $ingestObject = '< a title = "'. t('Ingest a New object into ') . $collectionName . ' '. $collection_pid . '" href = "'. base_path ( ) .
$ingestObject = '< a title = "' . t('Ingest a New object into !collection_name PID !collection_pid', array('!collection_name' => $collectionName, '!collection_pid' => $collection_pid)) . '" href = "' . base_path ( ) .
'fedora/ingestObject/' . $collection_pid . '/' . $collectionName . '">< img src = "' . $ base_url . ' / ' . $ path .
'/images/ingest.png" alt="' . t('Add a New Object') . '" class="icon">< / a > ' . t('Add to this Collection');
$ingest_text = t('Ingest a new object into @collection_name PID @collection_pid', array('@collection_name' => $collectionName, '@collection_pid' => $collection_pid));
$ingestObject = l(theme('image', "$path/images/ingest.png", $ingest_text), "fedora/ingestObject/$collection_pid/$collectionName", array('attributes' => array(
'class' => 'icon',
'title' => $ingest_text,
))) . t('Add to this Collection');
}
}
}
@ -721,18 +752,34 @@ class ObjectHelper {
}
/**
* Gets the parent objects that this object is related to
* Get the query to find parent objects.
*
* @param unknown_type $pid
* @return unknown
* @param $pid string
* A string containing a Fedora PID to find the parents for.
* @return string
* A string containing an iTQL query, selecting something into $object and $title
*/
function get_parent_objects($pid) {
$query_string = 'select $object $title from < #ri>
static function parentQuery ($pid) {
return 'select $object $title from < #ri>
where ($object < fedora-model:label > $title
and < info:fedora / ' . $ pid . ' > < fedora-rels-ext:isMemberOfCollection > $object
and $object < fedora-model:state > < info:fedora / fedora-system:def / model # Active > )
order by $title';
$objects = $this->getCollectionInfo($pid, $query_string);
}
/**
* Gets the parent objects that this object is related to
*
* @param $pid string
* A string containing a Fedora PID to find the parents for.
* @return string
* A string containing Sparql XML (the results of the self::parentQuery())
*/
function get_parent_objects($pid) {
$query_string = self::parentQuery();
module_load_include('inc', 'fedora_repository', 'CollectionClass');
$collection_class = new CollectionClass($pid);
$objects = CollectionClass::getRelatedItems($pid, $query_string);
return $objects;
}
@ -743,31 +790,24 @@ class ObjectHelper {
* @return string
*/
function get_parent_objects_asHTML($pid) {
global $base_url;
$parent_collections = $this->get_parent_objects($pid);
try {
$parent_collections = new SimpleXMLElement($parent_collections);
} catch (exception $e) {
drupal_set_message(t('Error getting parent objects @e', array('@e' => check_plain($e->getMessage()))));
return;
}
module_load_include('inc', 'fedora_repository', 'CollectionClass');
$results = self::performItqlQuery(self::parentQuery($pid));
$parent_collections = array();
foreach ($results as $result) {
$collection_title = $result['title'];
$collection_pid = $result['object'];
$path = "fedora/repository/$collection_pid/-/$collection_title";
$parent = array(
'data' => l($collection_title, $path),
);
$parent_collections_HTML = '';
foreach ($parent_collections->results->result as $result) {
$collection_label = $result->title;
foreach ($result->object->attributes() as $a => $b) {
if ($a == 'uri') {
$uri = (string) $b;
$uri = $base_url . '/fedora/repository' . substr($uri, strpos($uri, '/')) . '/-/' . $collection_label;
}
}
$parent_collections_HTML .= '< a href = "' . $uri . '" > ' . $collection_label . '< / a > < br / > ';
}
if (!empty($parent_collections_HTML)) {
$parent_collections_HTML = '< tr > < td > < h3 > ' . t("Belongs to these collections:") . ' < / h3 > < / td > < td colspan = "4" > ' . $parent_collections_HTML . '< / td > < / tr > ';
$parent_collections[] = $parent;
}
return $parent_collections_HTML;
if (!empty($parent_collections)) {
return theme('item_list', $parent_collections, t('Belongs to these collections'), 'ul');
}
}
/**
@ -817,6 +857,8 @@ class ObjectHelper {
/**
* Get a tree of related pids - for the basket functionality
*
* FIXME: This doesn't actually get a tree...
*
* @param type $pid
* @return type
*/
@ -827,19 +869,18 @@ class ObjectHelper {
module_load_include('inc', 'fedora_repository', 'api/fedora_utils');
// Get title and descriptions for $pid
$query_string = 'select $title $desc from < #ri>
$query_string = 'select $title $description from < #ri>
where $o < fedora-model:label > $title
and $o < dc:description > $desc
and $o < mulgara:is > < info:fedora / ' . $ pid . ' > ';
$url = variable_get('fedora_repository_url', 'http://localhost:8080/fedora/risearch');
$url .= "?type=tuples&flush=TRUE&format=csv&limit=1000&lang=itql&stream=on&query=";
$content = do_curl($url . htmlentities(urlencode($query_string)));
$rows = explode("\n", $content);
$fields = explode(',', $rows[1]);
$results = self::performItqlQuery($query_string);
$pids[$pid] = array('title' => $fields[0], 'description' => $fields[1]);
$pids = array();
//There should only be one... Anyway.
foreach($results as $result) {
$pids[$pid] = $result;
}
// $pids += $this->get_child_pids(array($pid));
@ -853,38 +894,24 @@ class ObjectHelper {
* @return type
*/
function get_child_pids($pids) {
//Build the parts which are used to filter to the list of input.
$query_chunks = array();
foreach ($pids as $pid) {
$query_chunks[] = '$s < mulgara:is > < info:fedora / ' . $ pid . ' > ';
}
// Get pid, title and description for children of object $pid
$query_string = 'select $o $title from < #ri> ' .
// $query_string = 'select $o $title $desc from < #ri> '.
'where $s < info:fedora / fedora-system:def / relations-external # hasMember > $o ' .
'and $o < fedora-model:label > $title ' .
// 'and $o < dc:description > $desc '.
'and ( ';
foreach ($pids as $pid) {
$query_string .= '$s < mulgara:is > < info:fedora / ' . $ pid . ' > or ';
}
$query_string = substr($query_string, 0, -3) . ' )';
$url = variable_get('fedora_repository_url', 'http://localhost:8080/fedora/risearch');
$url .= "?type=tuples&flush=TRUE&format=csv&limit=1000&lang=itql&stream=on&query=";
$url .= htmlentities(urlencode($query_string));
$content = $this->doCurl($url);
'and ( ' . implode(' or ', $query_chunks) . ' )';
$rows = explode("\n", $content);
// Knock of the first heading row
array_shift($rows);
$results = self::performItqlQuery($query_string);
$child_pids = array();
if (count($rows) ) {
if ($results) {
// iterate through each row
foreach ($rows as $row) {
if ($row == "") {
continue;
}
$fields = explode(',', $row);
$child_pid = substr($fields[0], 12);
$child_pids[$child_pid] = array('title' => $fields[1], 'description' => $fields[2]);
foreach ($results as $result) {
$child_pids[$result['o']] = array('title' => $result['title']);
}
if (!empty($child_pids)) {
$child_pids += $this->get_child_pids(array_keys($child_pids));
@ -913,58 +940,62 @@ class ObjectHelper {
/**
* Builds an array of drupal links for use in breadcrumbs.
*
* @todo Make fully recursive...
*
* @global type $base_url
* @param type $pid
* @param type $breadcrumbs
* @param type $level
*/
function getBreadcrumbs($pid, & $breadcrumbs, $level=10 ) {
function getBreadcrumbs($pid, & $breadcrumbs) {
module_load_include('inc', 'fedora_repository', 'api/fedora_utils');
// Before executing the query, we hve a base case of accessing the top-level collection
global $base_url;
if ($pid == variable_get('fedora_repository_pid', 'islandora:root')) {
//$breadcrumbs[] = l(t('Digital repository'), 'fedora/repository');
$breadcrumbs[] = l(variable_get('fedora_repository_title', 'Digital repository'), 'fedora/repository');
$breadcrumbs[] = l(t('Home'), $base_url);
static $max_level = 10;
static $level = -1;
if (count($breadcrumbs) === 0) {
$level = $max_level;
}
$root = variable_get('fedora_repository_pid', 'islandora:root');
if ($pid == $root) {
$breadcrumbs[] = l(menu_get_active_title(), 'fedora/repository');
$breadcrumbs[] = l(t('Home'), '< front > ');
}
else {
$query_string = 'select $parentObject $title $content from < #ri>
where (< info:fedora / ' . $ pid . ' > < fedora-model:label > $title
where (
< info:fedora / ' . $ pid . ' > < fedora-model:label > $title
and $parentObject < fedora-model:hasModel > $content
and (< info:fedora / ' . $ pid . ' > < fedora-rels-ext:isMemberOfCollection > $parentObject
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 > )
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';
$query_string = htmlentities(urlencode($query_string));
$url = variable_get('fedora_repository_url', 'http://localhost:8080/fedora/risearch');
$url .= "?type=tuples& flush=TRUE& format=CSV& limit=1& offset=0& lang=itql& stream=on& query=" . $query_string;
if (count($results = self::performItqlQuery($query_string)) > 0 & & $level > 0) {
$parent = $results[0]['parentObject'];
$this_title = $results[0]['title'];
$result = preg_split('/[\r\n]+/', do_curl($url));
array_shift($result); // throw away first line
$matches = str_getcsv(join("\n", $result));
if (count($matches) >= 2) {
$parent = preg_replace('/^info:fedora\//', '', $matches[0]);
if (0 == strlen($matches[1])) {
$matches[1] = "Unlabeled Object";
if (empty($this_title)) {
$this_title = t('Unlabeled Object');
}
$breadcrumbs[] = l($matches[1], 'fedora/repository/' . $pid);
if ($parent == variable_get('fedora_repository_pid', 'islandora:root')) {
//$breadcrumbs[] = l(t('Digital repository'), 'fedora/repository');
$breadcrumbs[] = l(variable_get('fedora_repository_title', 'Digital repository'), 'fedora/repository');
$breadcrumbs[] = l(t('Home'), $base_url);
}
elseif ($level > 0) {
$this->getBreadcrumbs($parent, $breadcrumbs, $level - 1);
}
}
$breadcrumbs[] = l($this_title, "fedora/repository/$pid");
$level--;
$this->getBreadcrumbs($parent, $breadcrumbs);
}
else {
$breadcrumbs[] = l(t("Path Calculation Error"), 'fedora/repository/' . $pid);
watchdog('fedora_repository', 'Error generating breadcrumbs for %pid. Verify there exists relationships back up to %root. (May also be due to a hierarchy deeper than %max_depth).', array('%pid' => $pid, '%root' => $root, '%max_depth' => $max_depth), WATCHDOG_WARNING);
$breadcrumbs[] = '...'; //Add an non-link, as we don't know how to get back to the root.
$this->getBreadcrumbs($root, $breadcrumbs); //And render the last two links and break (on the next pass).
}
}
}
@ -987,5 +1018,137 @@ class ObjectHelper {
drupal_set_message(t($configMess . "< br / > " . $messMap[$app] . "< hr width = '40%' align = 'left' / > ", array('%app' => $app)), 'warning', FALSE);
}
/**
* Parse the passed in Sparql XML string into a more easily usable format.
*
* @param $sparql string
* A string containing Sparql result XML.
* @return array
* Indexed (numerical) array, containing a number of associative arrays,
* with keys being the same as the variable names in the query.
* URIs beginning with 'info:fedora/' will have this beginning stripped
* off, to facilitate their use as PIDs.
*/
public static function parseSparqlResults($sparql) {
//Load the results into a SimpleXMLElement
$doc = new SimpleXMLElement($sparql, 0, FALSE, 'http://www.w3.org/2001/sw/DataAccess/rf1/result');
$results = array(); //Storage.
//Build the results.
foreach ($doc->results->children() as $result) {
//Built a single result.
$r = array();
foreach ($result->children() as $element) {
$val = NULL;
$attrs = $element->attributes();
if (!empty($attrs['uri'])) {
$val = self::pidUriToBarePid((string)$attrs['uri']);
}
else {
$val = (string)$element;
}
//Map the name to the value in the array.
$r[$element->getName()] = $val;
}
//Add the single result to the set to return.
$results[] = $r;
}
return $results;
}
/**
* Performs the given Resource Index query and return the results.
*
* @param $query string
* A string containing the RI query to perform.
* @param $type string
* The type of query to perform, as used by the risearch interface.
* @param $limit int
* An integer, used to limit the number of results to return.
* @param $offset int
* An integer, used to offset the results (results should be ordered, to
* maintain consistency.
*
* @return array
* Indexed (numerical) array, containing a number of associative arrays,
* with keys being the same as the variable names in the query.
* URIs beginning with 'info:fedora/' will have this beginning stripped
* off, to facilitate their use as PIDs.
*/
static function performRiQuery($query, $type = 'itql', $limit = -1, $offset = 0) {
//Setup the query options...
$options = array(
'type' => 'tuples',
'flush' => TRUE,
'format' => 'Sparql', //Sparql XML is processed into the array below.
'lang' => $type,
'query' => $query
);
//Add limit if provided.
if ($limit > 0) {
$options['limit'] = $limit;
}
//Add offset if provided.
if ($offset > 0) {
$options['offset'] = $offset;
}
//Construct the query URL.
$queryUrl = url(variable_get('fedora_repository_url', 'http://localhost:8080/fedora/risearch'), array('query' => $options));
//Perform the query.
$curl_result = do_curl_ext($queryUrl);
//If the query failed, write message to the logs and return.
if (!$curl_result[0]) {
watchdog('fedora_repository', 'Failed to perform %type resource index query: %query', array('%type' => $type, '%query' => $query), WATCHDOG_ERROR);
return FALSE;
}
//Pass the query's results off to a decent parser.
return self::parseSparqlResults($curl_result[0]);
}
/**
* Thin wrapper for self::_performRiQuery().
*
* @see self::performRiQuery()
*/
public static function performItqlQuery($query, $limit = -1, $offset = 0) {
return self::performRiQuery($query, 'itql', $limit, $offset);
}
/**
* Thin wrapper for self::performRiQuery().
*
* @see self::_performRiQuery()
*/
public static function performSparqlQuery($query, $limit = -1, $offset = 0) {
return self::performRiQuery($query, 'sparql', $limit, $offset);
}
/**
* Utility function used in self::performRiQuery().
*
* Strips off the 'info:fedora/' prefix from the passed in string.
*
* @param $uri string
* A string containing a URI.
*
* @return string
* The input string less the 'info:fedora/' prefix (if it has it).
* The original string otherwise.
*/
protected static function pidUriToBarePid($uri) {
$chunk = 'info:fedora/';
$pos = strpos($uri, $chunk);
if ($pos === 0) { //Remove info:fedora/ chunk
return substr($uri, strlen($chunk));
}
else { //Doesn't start with info:fedora/ chunk...
return $uri;
}
}
}
Alan Stanley
13 years ago