public function do_feed_rdf()
{
$format = $this->map_mime_request();
include 'library/EasyRdf.php';
include 'library/object-handlers.php';
include 'library/php-json-ld.php';
$doc[] = (object) array("@id" => "http://dbpedia.org/resource/John_Lennon", "http://schema.org/name" => "Manu Sporny", "http://schema.org/url" => (object) array("@id" => "http://manu.sporny.org/"), "http://schema.org/image" => (object) array("@id" => "http://manu.sporny.org/images/manu.png"));
$doc[] = (object) array("@id" => "http://dbpedia.org/resource/John_walton", "http://schema.org/name" => "Manu walton", "http://schema.org/url" => (object) array("@id" => "http://manu.sporny.org/"), "http://schema.org/image" => (object) array("@id" => "http://manu.sporny.org/images/manu.png"));
$context = (object) array("name" => "http://schema.org/name", "homepage" => (object) array("@id" => "http://schema.org/url", "@type" => "@id"), "image" => (object) array("@id" => "http://schema.org/image", "@type" => "@id"));
// compact a document according to a particular context
// see: http://json-ld.org/spec/latest/json-ld/#compacted-document-form
$compacted = jsonld_compact($doc, $context);
//echo json_encode($compacted, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
foreach ($this->return_namespaces() as $key => $value) {
EasyRdf_Namespace::set($key, $value);
}
EasyRdf_Namespace::delete("rss");
$graph = new EasyRdf_Graph();
$lh_rdf_object_handlers = new LH_rdf_object_handlers($format);
if ($theobject = get_queried_object()) {
$thetype = get_class($theobject);
$action = "do_content_" . $thetype;
$graph = $lh_rdf_object_handlers->{$action}($graph, $theobject);
} elseif (is_attachment()) {
global $wp_query;
if ($wp_query->query[attachment_id]) {
$args = array('post__in' => array($wp_query->query[attachment_id]), 'post_type' => 'attachment');
} else {
$args = array('name' => $wp_query->query[attachment], 'post_type' => 'attachment', 'posts_per_page' => 1);
}
$attachment_post = get_posts($args);
$graph = $lh_rdf_object_handlers->do_content_attachment($graph, $attachment_post[0]);
} else {
global $wp_query;
$graph = $lh_rdf_object_handlers->do_content_wp_query($graph, $wp_query);
}
$graph = apply_filters("lh_rdf_graph", $graph);
$serialize = $graph->serialise($format);
$etag = md5($serialize);
header("Etag: " . $etag);
echo $serialize;
}
/**
* THE FUNCTION: Generates the Feed in the proper format based on the request
**/
public function do_feed_rdf()
{
// Get the current format the client is asking for
$format = $this->map_mime_request();
// Setting namespace value
foreach ($this->return_namespaces() as $key => $value) {
EasyRdf_Namespace::set($key, $value);
}
// Initializing the Rdf_graph
$graph = new EasyRdf_Graph();
// Initializing objects handlers
$lh_rdf_object_handlers = new LH_rdf_object_handlers($format);
// If we do get the object queried for (valid for Post/Page/Feed)
if ($queried_object = get_queried_object()) {
// Get the current queried object class
$queried_object_type = get_class($queried_object);
// Compute the queried object type associated action
$action = "do_content_" . $queried_object_type;
// Call the related action as a method of the handler and get the initialized RDF Graph
$graph = $lh_rdf_object_handlers->{$action}($graph, $queried_object);
// If the queried object is an attachment
} elseif (is_attachment()) {
global $wp_query;
// Querying the attachment related data
if ($wp_query->query[attachment_id]) {
$args = array('post__in' => array($wp_query->query[attachment_id]), 'post_type' => 'attachment');
} else {
$args = array('name' => $wp_query->query[attachment], 'post_type' => 'attachment', 'posts_per_page' => 1);
}
// Get related post based on data initialized above
$attachment_post = get_posts($args);
// Initialize and get the associated RDF graph
$graph = $lh_rdf_object_handlers->do_content_attachment($graph, $attachment_post[0]);
// If the content is something else
} else {
global $wp_query;
// Call generic content related method to initialize the RDF graph
$graph = $lh_rdf_object_handlers->do_content_wp_query($graph, $wp_query);
}
// Serialiazing the graph we get in the proper format using the EasyRdf_Graph library
$serialized_graph = $graph->serialise($format);
// Generating proper etag
$etag = md5($serialized_graph);
// Adding the Etag information to the response headers
header("Etag: " . $etag);
// Display the whole graph
echo $serialized_graph;
}
