FIX DebugViewFrendlyErrorFormatter handle of admin_email

src/Control/Email/Email.php

@@ -49,9 +49,10 @@ class Email extends ViewableData
 
     /**
      * This will be set in the config on a site-by-site basis
+     * @see https://docs.silverstripe.org/en/4/developer_guides/email/#administrator-emails
      *
      * @config
-     * @var string The default administrator email address.
+     * @var string|array The default administrator email address or array of [email => name]
      */
     private static $admin_email = null;
 
@@ -792,7 +793,7 @@ class Email extends ViewableData
 
         // Do not interfere with emails styles
         Requirements::clear();
-        
+
         // Render plain part
         if ($plainTemplate && !$plainPart) {
             $plainPart = $this->renderWith($plainTemplate, $this->getData());
@@ -809,7 +810,7 @@ class Email extends ViewableData
             $htmlPartObject = DBField::create_field('HTMLFragment', $htmlPart);
             $plainPart = $htmlPartObject->Plain();
         }
-        
+
         // Rendering is finished
         Requirements::restore();
 

src/Logging/DebugViewFriendlyErrorFormatter.php

@@ -2,6 +2,7 @@
 
 namespace SilverStripe\Logging;
 
+use SilverStripe\Core\Convert;
 use SilverStripe\Dev\Debug;
 use SilverStripe\Control\Director;
 use SilverStripe\Control\Email\Email;
@@ -127,12 +128,36 @@ class DebugViewFriendlyErrorFormatter implements FormatterInterface
         $output = $renderer->renderHeader();
         $output .= $renderer->renderInfo("Website Error", $this->getTitle(), $this->getBody());
 
-        if (Email::config()->admin_email) {
+        if (!is_null($contactInfo = $this->addContactAdministratorInfo())) {
-            $mailto = Email::obfuscate(Email::config()->admin_email);
+            $output .= $renderer->renderParagraph($contactInfo);
-            $output .= $renderer->renderParagraph('Contact an administrator: ' . $mailto . '');
         }
 
         $output .= $renderer->renderFooter();
         return $output;
     }
+
+    /**
+     * Generate the line with admin contact info
+     *
+     * @return string|null
+     */
+    private function addContactAdministratorInfo()
+    {
+        if (!$adminEmail = Email::config()->admin_email) {
+            return null;
+        }
+
+        if (is_string($adminEmail)) {
+            return 'Contact an administrator: ' . Email::obfuscate($adminEmail);
+        }
+
+        if (!is_array($adminEmail) || !count($adminEmail)) {
+            return null;
+        }
+
+        $email = array_keys($adminEmail)[0];
+        $name = array_values($adminEmail)[0];
+
+        return sprintf('Contact %s: %s', Convert::raw2xml($name), Email::obfuscate($email));
+    }
 }

tests/php/Logging/DebugViewFriendlyErrorFormatterTest.php

@@ -29,6 +29,29 @@ The website server has not been able to respond to your request
 Contact an administrator: testy [at] mctest [dot] face
 
 
+TEXT
+        ;
+
+        $this->assertEquals($expected, $formatter->output(404));
+    }
+
+    public function testAdminEmailWithName()
+    {
+        Email::config()->set('admin_email', ['testy@mctest.face' => 'The ad&min']);
+
+        $formatter = new DebugViewFriendlyErrorFormatter();
+        $formatter->setTitle("There has been an error");
+        $formatter->setBody("The website server has not been able to respond to your request");
+
+        $expected = <<<TEXT
+WEBSITE ERROR
+There has been an error
+-----------------------
+The website server has not been able to respond to your request
+
+Contact The ad&amp;min: testy [at] mctest [dot] face
+
+
 TEXT
         ;