Add new selectsource.php as bae for multiauth customization

mymodule/themes/fancytheme/multiauth/selectsource.php

+<?php
+
+/**
+ * This page shows a list of authentication sources. When the user selects
+ * one of them if pass this information to the
+ * \SimpleSAML\Module\multiauth\Auth\Source\MultiAuth class and call the
+ * delegateAuthentication method on it.
+ *
+ * @author Lorenzo Gil, Yaco Sistemas S.L.
+ * @package SimpleSAMLphp
+ */
+
+// Retrieve the authentication state
+if (!array_key_exists('AuthState', $_REQUEST)) {
+    throw new \SimpleSAML\Error\BadRequest('Missing AuthState parameter.');
+}
+$authStateId = $_REQUEST['AuthState'];
+
+/** @var array $state */
+$state = \SimpleSAML\Auth\State::loadState($authStateId, \SimpleSAML\Module\multiauth\Auth\Source\MultiAuth::STAGEID);
+
+if (array_key_exists("\SimpleSAML\Auth\Source.id", $state)) {
+    $authId = $state["\SimpleSAML\Auth\Source.id"];
+    /** @var \SimpleSAML\Module\multiauth\Auth\Source\MultiAuth $as */
+    $as = \SimpleSAML\Auth\Source::getById($authId);
+} else {
+    $as = null;
+}
+
+$source = null;
+if (array_key_exists('source', $_REQUEST)) {
+    $source = $_REQUEST['source'];
+} else {
+    foreach ($_REQUEST as $k => $v) {
+        $k = explode('-', $k, 2);
+        if (count($k) === 2 && $k[0] === 'src') {
+            $source = base64_decode($k[1]);
+        }
+    }
+}
+if ($source !== null) {
+    if ($as !== null) {
+        $as->setPreviousSource($source);
+    }
+    \SimpleSAML\Module\multiauth\Auth\Source\MultiAuth::delegateAuthentication($source, $state);
+}
+
+if (array_key_exists('multiauth:preselect', $state)) {
+    $source = $state['multiauth:preselect'];
+    \SimpleSAML\Module\multiauth\Auth\Source\MultiAuth::delegateAuthentication($source, $state);
+}
+
+$globalConfig = \SimpleSAML\Configuration::getInstance();
+$t = new \SimpleSAML\XHTML\Template($globalConfig, 'mymodule:selectsource.tpl.php');
+
+$defaultLanguage = $globalConfig->getString('language.default', 'en');
+$language = $t->getTranslator()->getLanguage()->getLanguage();
+
+$sources = $state[\SimpleSAML\Module\multiauth\Auth\Source\MultiAuth::SOURCESID];
+foreach ($sources as $key => $source) {
+    $sources[$key]['source64'] = base64_encode($sources[$key]['source']);
+    if (isset($sources[$key]['text'][$language])) {
+        $sources[$key]['text'] = $sources[$key]['text'][$language];
+    } else {
+        $sources[$key]['text'] = $sources[$key]['text'][$defaultLanguage];
+    }
+
+    if (isset($sources[$key]['help'][$language])) {
+        $sources[$key]['help'] = $sources[$key]['help'][$language];
+    } else {
+        $sources[$key]['help'] = $sources[$key]['help'][$defaultLanguage];
+    }
+}
+
+$t->data['authstate'] = $authStateId;
+$t->data['sources'] = $sources;
+$t->data['selfUrl'] = $_SERVER['PHP_SELF'];
+
+if ($as !== null) {
+    $t->data['preferred'] = $as->getPreviousSource();
+} else {
+    $t->data['preferred'] = null;
+}
+$t->show();
+exit();