IMPR: Login forms

_config/base-extensions.yml

@@ -1,5 +1,8 @@
 ---
 Name: a2nt-cms-niceties-base-extensions
+After:
+  - login-forms
+  - '#coresecurity'
 ---
 # Basic extensions
 SilverStripe\Admin\LeftAndMain:
@@ -51,6 +54,10 @@ SilverStripe\Core\Injector\Injector:
     class: A2nt\CMSNiceties\Forms\GridField\GridFieldConfig_RelationEditor
   SilverStripe\Forms\FormRequestHandler:
     class: A2nt\CMSNiceties\Ajax\AjaxFormRequestHandler
+  SilverStripe\Security\Security:
+    properties:
+      Authenticators:
+        default: '%$A2nt\CMSNiceties\Forms\Authenticator'
 
 SilverStripe\UserForms\Form\UserForm:
   extensions:

src/Forms/Authentificator.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace A2nt\CMSNiceties\Forms;
+
+use SilverStripe\Security\MemberAuthenticator\MemberAuthenticator;
+
+class Authenticator extends MemberAuthenticator
+{
+    public function getLoginHandler($link)
+    {
+        return LoginHandler::create($link, $this);
+    }
+}

src/Forms/LoginHandler.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace A2nt\CMSNiceties\Forms;
+
+use SilverStripe\Control\Director;
+use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Security\MemberAuthenticator\LoginHandler as MemberAuthenticatorLoginHandler;
+use SilverStripe\Security\MemberAuthenticator\MemberLoginForm;
+
+class LoginHandler extends MemberAuthenticatorLoginHandler
+{
+    private static $allowed_actions = [
+        'LoginForm',
+    ];
+
+    public function doLogin($data, MemberLoginForm $form, HTTPRequest $request)
+    {
+        return parent::doLogin($data, $form, $request);
+    }
+
+    public function loginForm()
+    {
+        $form = parent::loginForm();
+
+        if (Director::isLive() && $form->get_protector()) {
+            $form->enableSpamProtection();
+        }
+        $form->addExtraClass('legacy');
+
+        return $form;
+    }
+}