Added some errorcode param handling to login.php.

login.php

@@ -2,7 +2,9 @@
 
 include_once("../../config.php");
 
+
 global $CFG, $PAGE, $OUTPUT;
+include_once($CFG->libdir . "/authlib.php");
 
 //HTTPS is required in this page when $CFG->loginhttps enabled
 $PAGE->https_required();
@@ -21,6 +23,9 @@
        exit;
 }
 
+$errorcode = optional_param('errorcode', 0, PARAM_INT);
+
+
 $context = CONTEXT_SYSTEM::instance();
 $PAGE->set_url("$CFG->httpswwwroot/auth/saml/login.php");
 $PAGE->set_context($context);
@@ -72,6 +77,22 @@
 
 $frm = data_submitted();
 
+if ($errorcode == AUTH_LOGIN_UNAUTHORISED) {
+    $errormsg = get_string("unauthorisedlogin", "", $frm->username);
+} else if($errorcode == AUTH_LOGIN_FAILED) {
+    $errormsg = get_string("invalidlogin");
+} else if ($errorcode == AUTH_LOGIN_LOCKOUT) {
+    $errormsg = get_string('sessionerroruser', 'error');
+} else if (!empty($SESSION->loginerrormsg)) {
+    // We had some errors before redirect, show them now.
+    $errormsg = $SESSION->loginerrormsg;
+    unset($SESSION->loginerrormsg);
+}
+
+if (!empty($errormsg) && method_exists($PAGE->requires, 'js_init_call')) {
+    $PAGE->requires->js_init_call('M.util.focus_login_error', null, true);
+}
+
 echo '<center>';
 
 if (in_array('saml', $authsequence)){