/**
* Recursive function to extract properties.
*
* @param string $uri
* URI of schema type.
*
* @return array|null
* Array of properties of the type and all parent types.
*/
private function getProperties($uri) {
$resource = array("type" => "uri", "value" => $uri);
$property_list = $this->graph->resourcesMatching("http://schema.org/domainIncludes", $resource);
$options = array();
foreach ($property_list as $value) {
// Omit deprecated properties.
if ($value->get("schema:supersededBy")) {
continue;
}
$options[$value->shorten()] = $value->get("rdfs:label")->getValue();
}
$parents = $this->graph->all($uri, "rdfs:subClassOf");
foreach ($parents as $value) {
$options += $this->getProperties($value->getUri());
}
return $options;
}
/**
* @param EasyRdf_Graph $po_graph
* @param string $ps_base_node
* @param string $ps_node_uri
* @param int $pn_limit
* @param bool $pb_recursive
* @return array
*/
static function getListOfRelatedGraphs($po_graph, $ps_base_node, $ps_node_uri, $pn_limit, $pb_recursive = false)
{
$vs_cache_key = md5(serialize(func_get_args()));
if (CompositeCache::contains($vs_cache_key, 'GettyLinkedDataRelatedGraphs')) {
return CompositeCache::fetch($vs_cache_key, 'GettyLinkedDataRelatedGraphs');
}
$va_related_nodes = $po_graph->all($ps_base_node, $ps_node_uri);
$va_pull_graphs = array();
if (is_array($va_related_nodes)) {
$vn_i = 0;
foreach ($va_related_nodes as $o_related_node) {
$vs_pull_uri = (string) $o_related_node;
if (!($o_pull_graph = self::getURIAsRDFGraph($vs_pull_uri))) {
return false;
}
$va_pull_graphs[$vs_pull_uri] = $o_pull_graph;
if (++$vn_i >= $pn_limit) {
break;
}
}
}
if ($pb_recursive) {
$va_sub_pull_graphs = array();
foreach ($va_pull_graphs as $vs_pull_uri => $o_pull_graph) {
// avoid circular references
if (isset($va_pull_graphs[$vs_pull_uri]) || isset($va_sub_pull_graphs[$vs_pull_uri])) {
continue;
}
$va_sub_pull_graphs = array_merge($va_sub_pull_graphs, self::getListOfRelatedGraphs($o_pull_graph, $vs_pull_uri, $ps_node_uri, $pn_limit, true));
}
$va_pull_graphs = array_merge($va_pull_graphs, $va_sub_pull_graphs);
}
CompositeCache::save($vs_cache_key, $va_pull_graphs, 'GettyLinkedDataRelatedGraphs');
return $va_pull_graphs;
}
