Export the new 'hide.from.discovery' option in the PHP metadata array when the...

Export the new 'hide.from.discovery' option in the PHP metadata array when the "Hide From Discovery" REFEDS Entity Category is defined in the hosted IdP metadata.

www/saml2/idp/metadata.php

@@ -136,6 +136,15 @@ try {
 
 	if ($idpmeta->hasValue('EntityAttributes')) {
 		$metaArray['EntityAttributes'] = $idpmeta->getArray('EntityAttributes');
+
+		// check for entity categories
+		$entity_category = 'http://macedir.org/entity-category';
+		$hide_from_discovery = 'http://refeds.org/category/hide-from-discovery';
+		if (array_key_exists($entity_category, $metaArray['EntityAttributes'])) {
+			if (in_array($hide_from_discovery, $metaArray['EntityAttributes'][$entity_category])) {
+				$metaArray['hide.from.discovery'] = true;
+			}
+		}
 	}
 
 	if ($idpmeta->hasValue('UIInfo')) {