Add presence validation for EmailRecipient recipient, add error handling

code/Control/UserDefinedFormController.php

@@ -2,13 +2,16 @@
 
 namespace SilverStripe\UserForms\Control;
 
+use Exception;
 use PageController;
+use Psr\Log\LoggerInterface;
 use SilverStripe\Assets\File;
 use SilverStripe\Assets\Upload;
 use SilverStripe\Control\Controller;
 use SilverStripe\Control\Email\Email;
 use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Core\Manifest\ModuleLoader;
 use SilverStripe\Forms\Form;
 use SilverStripe\i18n\i18n;
@@ -23,6 +26,7 @@ use SilverStripe\UserForms\Model\Submission\SubmittedForm;
 use SilverStripe\View\ArrayData;
 use SilverStripe\View\Requirements;
 use SilverStripe\View\SSViewer;
+use Swift_RfcComplianceException;
 
 /**
  * Controller for the {@link UserDefinedForm} page type.
@@ -350,6 +354,8 @@ JS
 
                 // check to see if they are a dynamic reciever eg based on a dropdown field a user selected
                 $emailTo = $recipient->SendEmailToField();
+
+                try {
                     if ($emailTo && $emailTo->exists()) {
                         $submittedFormField = $submittedFields->find('Name', $recipient->SendEmailToField()->Name);
 
@@ -361,6 +367,18 @@ JS
                     } else {
                         $email->setTo(explode(',', $recipient->EmailAddress));
                     }
+                } catch (Swift_RfcComplianceException $e) {
+                    // The sending address is empty and/or invalid. Log and skip sending.
+                    $error = sprintf(
+                        'Failed to set sender for userform submission %s: %s',
+                        $submittedForm->ID,
+                        $e->getMessage()
+                    );
+
+                    Injector::inst()->get(LoggerInterface::class)->notice($error);
+
+                    continue;
+                }
 
                 // check to see if there is a dynamic subject
                 $emailSubject = $recipient->SendEmailSubjectField();

code/Model/Recipient/EmailRecipient.php

@@ -550,6 +550,12 @@ class EmailRecipient extends DataObject
         if (!$this->EmailFrom && empty(Email::getSendAllEmailsFrom()) && empty(Email::config()->get('admin_email'))) {
             $result->addError(_t(__CLASS__.".EMAILFROMREQUIRED", '"Email From" address is required'));
         }
+
+        // Sending will also fail if there's no recipient defined
+        if (!$this->EmailAddress && !$this->SendEmailToFieldID) {
+            $result->addError(_t(__CLASS__.".EMAILTOREQUIRED", '"Send email to" address or field is required'));
+        }
+
         return $result;
     }
 

tests/Model/Recipient/EmailRecipientTest.php

@@ -27,4 +27,15 @@ class EmailRecipientTest extends SapphireTest
         $result = $recipient->getEmailBodyContent();
         $this->assertContains('/about-us/', $result);
     }
+
+    /**
+     * @expectedException SilverStripe\ORM\ValidationException
+     * @expectedExceptionMessage "Send email to" address or field is required
+     */
+    public function testEmptyRecipientFailsValidation()
+    {
+        $recipient = new EmailRecipient();
+        $recipient->EmailFrom = 'test@example.com';
+        $recipient->write();
+    }
 }

tests/Model/UserDefinedFormTest.php

@@ -104,7 +104,6 @@ class UserDefinedFormTest extends FunctionalTest
         $this->assertNotContains('SummaryHide', array_keys($summaryFields), 'Summary field showing displayed field');
     }
 
-
     public function testEmailRecipientPopup()
     {
         $this->logInWithPermission('ADMIN');
@@ -114,6 +113,7 @@ class UserDefinedFormTest extends FunctionalTest
         $popup = new EmailRecipient();
         $popup->FormID = $form->ID;
         $popup->FormClass = UserDefinedForm::class;
+        $popup->EmailAddress = 'test@example.com';
 
         $fields = $popup->getCMSFields();
 
@@ -146,6 +146,7 @@ class UserDefinedFormTest extends FunctionalTest
     public function testGetEmailBodyContent()
     {
         $recipient = new EmailRecipient();
+        $recipient->EmailAddress = 'test@example.com';
 
         $emailBody = 'not html';
         $emailBodyHtml = '<p>html</p>';
@@ -185,6 +186,7 @@ class UserDefinedFormTest extends FunctionalTest
         $recipient = new EmailRecipient();
         $recipient->FormID = $page->ID;
         $recipient->FormClass = UserDefinedForm::class;
+        $recipient->EmailAddress = 'test@example.com';
 
         // Set the default template
         $recipient->EmailTemplate = current(array_keys($recipient->getEmailTemplateDropdownValues()));