idp hinting

lib/Auth/Source/Campusidp.php

@@ -80,6 +80,14 @@ class Campusidp extends Source
 
     public function authenticate(&$state)
     {
+        if (array_key_exists('aarc_idp_hint', $_REQUEST)) {
+            $state['aarc_idp_hint'] = $_REQUEST['aarc_idp_hint'];
+        }
+
+        if (array_key_exists('idphint', $_REQUEST)) {
+            $state['idphint'] = $_REQUEST['idphint'];
+        }
+
         $state[self::AUTHID] = $this->authId;
         $state[self::SOURCESID] = $this->sources;
         $state[self::USER_PASS_SOURCE_NAME] = $this->userPassSourceName;

www/selectsource.php

@@ -17,13 +17,30 @@ if (!array_key_exists('AuthState', $_REQUEST) && !array_key_exists('authstate',
 empty($_REQUEST['AuthState']) ? $authStateId = $_POST['authstate'] : $authStateId = $_REQUEST['AuthState'];
 $state = State::loadState($authStateId, Campusidp::STAGEID_USERPASS);
 
+$metadataStorageHandler = MetaDataStorageHandler::getMetadataHandler();
+$metadata = $metadataStorageHandler->getList();
+
+if (array_key_exists('aarc_idp_hint', $state)) {
+    $parts = explode('?', urldecode($state['aarc_idp_hint']), 2);
+
+    if (!empty($metadata[$parts[0]])) {
+        $state['saml:idp'] = $parts[0];
+        Campusidp::delegateAuthentication($state[Campusidp::SP_SOURCE_NAME], $state);
+    }
+}
+
+if (array_key_exists('idphint', $state)) {
+    $parts = explode(',', $state['idphint']);
+        if (count($parts) == 1) {
+            $state['saml:idp'] = urldecode($parts[0]);
+            Campusidp::delegateAuthentication($state[Campusidp::SP_SOURCE_NAME], $state);
+        }
+}
+
 if (array_key_exists('source', $_POST)) {
     if (array_key_exists('searchbox', $_POST)) {
         $state['saml:idp'] = $_POST['searchbox'];
 
-        $metadataStorageHandler = MetaDataStorageHandler::getMetadataHandler();
-        $metadata = $metadataStorageHandler->getList();
-
         Campusidp::setCookie(Campusidp::COOKIE_IDP_ENTITY_ID, $_POST['searchbox']);
         Campusidp::setCookie(Campusidp::COOKIE_INSTITUTION_NAME, json_encode($metadata[$_POST['searchbox']]['name']));
         Campusidp::setCookie(Campusidp::COOKIE_INSTITUTION_IMG, Campusidp::getMostSquareLikeImg($metadata[$_POST['searchbox']]));