/**
* Load the JSON-LD at the specified path (the path is appended to the *base_uri*). If the path is empty or null
* it is loaded from the query variables (via WordPress).
*
* @since 3.0.0
*
* @uses wl_configuration_get_redlink_dataset_uri() to get the default dataset URI.
* @uses wl_jsonld_load_remote() to load a remote JSON-LD file.
*
* @param string $path The entity path.
*/
function load($path = null)
{
// If the path is empty, load the resource from the query string variable.
if (empty($path)) {
$path = get_query_var(WL_ENTITY_VIEW_ENTITY_ID_QUERY_VAR);
}
// If a base URI has been set, append the path, otherwise use the path.
$this->url = !empty($this->base_uri) ? $this->base_uri . ('/' !== substr($this->base_uri, -1, 1) ? '/' : '') . $path : $path;
$this->graph = wl_jsonld_load_remote($this->url . $this->suffix);
$this->json_path = new JSONPath($this->graph);
}
/**
* @param array $collection
*
* @return array
*/
public function filter($collection)
{
$return = [];
foreach ($collection as $item) {
foreach ($item as $key => $value) {
if ($this->value === $key) {
if ('.jpg' === strtolower(substr($value, -4)) || '.gif' === strtolower(substr($value, -4))) {
continue;
}
$return[] = array(wl_jsonld_load_remote($value . '.json'));
}
}
}
return $return;
}
/**
* Get a property value using the specified name, language and graph. The property name can be a concatenated tree of
* keys, e.g. schema:location>schema:latitude.
*
* @param object $graph The graph.
* @param string $name The property tree.
* @param null|string $language If provided, a two-characters language code.
* @param string $suffix The suffix for remote requests (empty if not provided).
* @return null|string The value or null if not found.
*/
function wl_jsonld_get_property($graph, $name, $language = null, $suffix = '', $index = 0)
{
$keys = explode('>', html_entity_decode($name));
$value = null;
foreach ($keys as $key) {
if (null !== $value) {
$graph = wl_jsonld_load_remote($value . $suffix);
}
$key_exp = wl_prefixes_expand($key);
$value = wl_jsonld_get_property_value($graph, $key_exp, $language, $index);
}
return $value;
}
