Sort of working beta

app/Notification/NotificationBody/ListNotificationBody.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Notification\NotificationBody;
+
+use App\Notification\NotificationBody;
+use App\Notification\Stringifiable;
+
+class ListNotificationBody extends NotificationBody {
+
+    private array $content;
+
+    public function __construct(array $content) {
+        $this->content = $content;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function toMarkdownString(): string {
+        $string = "";
+        foreach ($this->content as $item) {
+            $string .= "- ". $this->getTextFromContent($item) . "\n";
+        }
+        return $string;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function toString(): string {
+        $string = "";
+        foreach ($this->content as $item) {
+            $string .= $this->getTextFromContent($item) . "\n";
+        }
+        return $string;
+    }
+
+    public function getTextFromContent(string|Stringifiable $content): string {
+        if ($content instanceof Stringifiable) {
+            return $content->toString();
+        }
+        return $content;
+    }
+}