add class that handles model with slug

src/PersistentData/Model/ModelWithSlug.php

@@ -0,0 +1,35 @@
+<?php namespace SokoWeb\PersistentData\Model;
+
+use Cocur\Slugify\Slugify;
+
+class ModelWithSlug extends Model
+{
+    protected static string $slugSource;
+
+    protected ?string $slug = null;
+
+    public static function getFields(): array
+    {
+        return array_merge(['id', 'slug'], static::$fields);
+    }
+
+    public function setSlug(?string $slug): void
+    {
+        $this->slug = $slug;
+    }
+
+    public function getSlug(): string
+    {
+        if ($this->slug === null) {
+            $this->slug = $this->generateSlug();
+        }
+
+        return $this->slug;
+    }
+
+    private function generateSlug(): string
+    {
+        $slugSourceGetMethod = 'get' . str_replace('_', '', ucwords(static::$slugSource, '_'));
+        return Slugify::create()->slugify($this->$slugSourceGetMethod());
+    }
+}