FIX: outdated swift mailer breaking mails formating

_config/base-extensions.yml

@@ -58,6 +58,8 @@ SilverStripe\Core\Injector\Injector:
     properties:
       Authenticators:
         default: '%$A2nt\CMSNiceties\Forms\Authenticator'
+  SilverStripe\Control\Email\Email:
+    class: A2nt\CMSNiceties\MailerFix
 
 SilverStripe\UserForms\Form\UserForm:
   extensions:

composer.json

@@ -16,7 +16,8 @@
         "silverstripe/cms": "*",
         "a2nt/silverstripe-elemental-basics": "*",
         "silverstripe/widgets": "*",
-        "gorriecoe/silverstripe-linkfield": "*"
+        "gorriecoe/silverstripe-linkfield": "*",
+        "symfony/mailer": "^6"
     },
     "autoload": {
         "psr-4": {

src/MailerFix.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace A2nt\CMSNiceties;
+
+use RuntimeException;
+use SilverStripe\Control\Director;
+use SilverStripe\Control\Email\Email;
+use Symfony\Component\Mailer\Mailer;
+use Symfony\Component\Mailer\Transport;
+use Symfony\Component\Mime\Email as MimeEmail;
+
+class MailerFix extends Email
+{
+    private $args;
+
+    public function __construct(
+        $from = null,
+        $to = null,
+        $subject = null,
+        $body = null,
+        $cc = null,
+        $bcc = null,
+        $returnPath = null
+    ) {
+        $this->args = func_get_args();
+        parent::__construct($from, $to, $subject, $body, $cc, $bcc, $returnPath);
+    }
+
+
+    private static function convertVars($mails)
+    {
+        return is_array($mails) ? implode(' ', $mails) : $mails;
+    }
+
+    public function send()
+    {
+        $transport = Transport::fromDsn('native://default');//smtp://localhost
+        $mailer = new Mailer($transport);
+
+        $body = $this->getBody();
+        $to = self::convertVars($this->args[1]);
+
+        $email = (new MimeEmail())
+            ->to($to)
+            //->priority(Email::PRIORITY_HIGH)
+            ->subject($this->args[2])
+            ->text(strip_tags($body, []))
+            ->html($body);
+
+        $from = self::convertVars($this->args[0]);
+        $from = $from ? $from : self::getDefaultFrom();
+        if ($from) {
+            $email->from($from);
+        }
+
+        $cc = isset($this->args[4]) ? self::convertVars($this->args[4]) : null;
+        if ($cc) {
+            $email->cc($cc);
+        }
+
+        $bcc = isset($this->args[5]) ? self::convertVars($this->args[5]) : null;
+        if ($bcc) {
+            $email->bcc($bcc);
+        }
+
+        $reply = isset($this->args[6]) ? self::convertVars($this->args[6]) : null;
+        if ($reply) {
+            $email->replyTo($reply);
+        }
+
+
+        $mailer->send($email);
+        //parent::send();
+    }
+
+    private function getDefaultFrom(): string
+    {
+        // admin_email can have a string or an array config
+        // https://docs.silverstripe.org/en/4/developer_guides/email/#administrator-emails
+        $adminEmail =Email::config()->get('admin_email');
+        if (is_array($adminEmail) && count($adminEmail ?? []) > 0) {
+            $defaultFrom = array_keys($adminEmail)[0];
+        } else {
+            if (is_string($adminEmail)) {
+                $defaultFrom = $adminEmail;
+            } else {
+                $defaultFrom = '';
+            }
+        }
+        if (empty($defaultFrom)) {
+            $host = Director::host();
+            if (empty($host)) {
+                throw new RuntimeException('Host not defined');
+            }
+            $defaultFrom = sprintf('noreply@%s', $host);
+        }
+
+        return $defaultFrom;
+    }
+}