API Strongly-type action method signatures

code/FrameworktestRegressSessionAdmin.php

@@ -91,7 +91,7 @@ class FrameworktestRegressSessionAdmin extends Controller
         return $form;
     }
 
-    public function startsession($data, $form)
+    public function startsession(array $data, Form $form): HTTPResponse
     {
         Session::set('enabletranslatable', (isset($data['enabletranslatable'])) ? $data['enabletranslatable'] : null);
         Session::set('db', $data['db']);

code/TestFileUploadPage.php

@@ -6,6 +6,7 @@ use SilverStripe\Security\Member;
 use SilverStripe\Forms\EmailField;
 use SilverStripe\Forms\FileField;
 use SilverStripe\AssetAdmin\Forms\UploadField;
+use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\FormAction;
 use SilverStripe\Forms\Form;
@@ -38,11 +39,11 @@ class TestFileUploadPage_Controller extends TestPage_Controller
         return new Form($this, "Form", $fields, $actions);
     }
 
-    public function addMember($data, $form)
+    public function addMember(array $data, Form $form): HTTPResponse
     {
         $member = new Member();
         $form->saveInto($member);
         $member->write();
-        $this->redirectBack();
+        return $this->redirectBack();
     }
 }

code/TestPage.php

@@ -13,6 +13,7 @@ use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\Form;
 use SilverStripe\Forms\TextField;
 use SilverStripe\Control\Email\Email;
+use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Security\DefaultAdminService;
 use SilverStripe\Security\Member;
 use SilverStripe\Security\Security;
@@ -111,11 +112,11 @@ class TestPage_Controller extends PageController
         return $form;
     }
 
-    public function save($data, $form)
+    public function save(array $data, Form $form): HTTPResponse
     {
         $form->saveInto($this->dataRecord);
         $this->dataRecord->write();
-        $this->redirectBack();
+        return $this->redirectBack();
     }
 
     public function gohome()
@@ -140,7 +141,8 @@ class TestPage_Controller extends PageController
         );
     }
 
-    public function sendEmail($data, $form)
+    public function sendEmail(array $data, Form $form): HTTPResponse
+
     {
         $email = new Email();
         $email->setTo($data['Email']);
@@ -149,6 +151,6 @@ class TestPage_Controller extends PageController
         $email->setBody('A body with some umlauts: öäüß');
         $email->send();
 
-        echo "<p>email sent to " . $data['Email'] . "</p>";
+        return HTTPResponse::create()->setBody("<p>email sent to " . $data['Email'] . "</p>");
     }
 }

code/multiform/Page2MultiForm.php

@@ -1,17 +1,18 @@
 <?php
 
+use SilverStripe\Control\HTTPResponse;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\Security\Member;
 use SilverStripe\Forms\TextField;
 use SilverStripe\Forms\FieldList;
-
+use SilverStripe\Forms\Form;
 
 class Page2MultiForm extends MultiForm
 {
 
     public static $start_step = 'Page2PersonalDetailsFormStep';
 
-    public function finish($data, $form)
+    public function finish(array $data, Form $form): HTTPResponse
     {
         parent::finish($data, $form);
         $steps = DataObject::get('MultiFormStep', "SessionID = {$this->session->ID}");
@@ -42,7 +43,7 @@ class Page2MultiForm extends MultiForm
             }
         }
         $controller = $this->getController();
-        $controller->redirect($controller->Link() . 'finished');
+        return $controller->redirect($controller->Link() . 'finished');
     }
 }
 

code/multiform/Page3MultiForm.php

@@ -11,7 +11,7 @@ class Page3MultiForm extends MultiForm
 {
     public static $start_step = 'Page3StartFormStep';
 
-    public function finish($data, $form)
+    public function finish(array $data, Form $form): HTTPResponse
     {
         parent::finish($data, $form);
         $steps = DataObject::get('MultiFormStep', "SessionID = {$this->session->ID}");
@@ -42,7 +42,7 @@ class Page3MultiForm extends MultiForm
             }
         }
         $controller = $this->getController();
-        $controller->redirect($controller->Link() . 'finished');
+        return $controller->redirect($controller->Link() . 'finished');
     }
 }
 

code/multiform/TestMultiForm.php

@@ -4,12 +4,14 @@ use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\LiteralField;
 use SilverStripe\Control\Session;
 use SilverStripe\Control\Director;
+use SilverStripe\Control\HTTPResponse;
+use SilverStripe\Forms\Form;
 use SilverStripe\Forms\TextField;
 class TestMultiForm extends MultiForm
 {
     public static $start_step = 'TestMultiFormStepOne';
     
-    public function finish($data, $form)
+    public function finish(array $data, Form $form): HTTPResponse
     {
         parent::finish($data, $form);
         
@@ -29,7 +31,7 @@ class TestMultiForm extends MultiForm
         
         Session::set("MultiFormMessage", "Your information has been submitted.");
         
-        $this->Controller()->redirect(Director::BaseURL() . $this->Controller()->URLSegment);
+        return $this->Controller()->redirect(Director::BaseURL() . $this->Controller()->URLSegment);
     }
 }
 

code/recaptcha/RecaptchaTestPage.php

@@ -7,6 +7,8 @@ use SilverStripe\Forms\FormAction;
 use SilverStripe\Forms\RequiredFields;
 use SilverStripe\Forms\Form;
 use SilverStripe\Control\Director;
+use SilverStripe\Control\HTTPResponse;
+
 class RecaptchaTestPage extends Page
 {
 }
@@ -38,7 +40,7 @@ class RecaptchaTestPage_Controller extends PageController
         return $form;
     }
 
-    public function submit($data, $form)
+    public function submit(array $data, Form $form): HTTPResponse
     {
         $form->sessionMessage('Hooray!', 'good');