From 4961e964d28f5cdb2c96c9ae5aaa1f05acd8be79 Mon Sep 17 00:00:00 2001
From: Mihail Geshoski <mihail@moodle.com>
Date: Wed, 31 Jan 2018 14:50:26 +0800
Subject: [PATCH] MDL-61485 authentication: Add callback 'pre_signup_requests'

---
 login/lib.php    | 14 +++++++++++++-
 login/signup.php |  5 +++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/login/lib.php b/login/lib.php
index 231b7a969ee..8927e03f6be 100644
--- a/login/lib.php
+++ b/login/lib.php
@@ -381,4 +381,16 @@ function core_login_validate_forgot_password_data($data) {
     }
 
     return $errors;
-}
\ No newline at end of file
+}
+
+/**
+ * Plugins can create pre sign up requests.
+ */
+function core_login_pre_signup_requests() {
+    $callbacks = get_plugins_with_function('pre_signup_requests');
+    foreach ($callbacks as $type => $plugins) {
+        foreach ($plugins as $plugin => $pluginfunction) {
+            $pluginfunction();
+        }
+    }
+}
diff --git a/login/signup.php b/login/signup.php
index ee6a140c8c2..4e24aece1b5 100644
--- a/login/signup.php
+++ b/login/signup.php
@@ -27,6 +27,7 @@
 require('../config.php');
 require_once($CFG->dirroot . '/user/editlib.php');
 require_once($CFG->libdir . '/authlib.php');
+require_once('lib.php');
 
 if (!$authplugin = signup_is_enabled()) {
     print_error('notlocalisederrormessage', 'error', '', 'Sorry, you may not use this page.');
@@ -59,6 +60,10 @@ if (isloggedin() and !isguestuser()) {
     exit;
 }
 
+// Plugins can create pre sign up requests.
+// Can be used to force additional actions before sign up such as acceptance of policies, validations, etc.
+core_login_pre_signup_requests();
+
 $mform_signup = $authplugin->signup_form();
 
 if ($mform_signup->is_cancelled()) {