add modules and upload file

kernel/modules/post/service/PostService.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace kernel\modules\post\service;
+
+use kernel\modules\post\models\Post;
+use kernel\FormModel;
+
+class PostService
+{
+    public function create(FormModel $form_model): false|Post
+    {
+        $model = new Post();
+        $model->content = $form_model->getItem('content');
+        $model->user_id = $form_model->getItem('user_id');
+        if ($model->save()){
+            return $model;
+        }
+
+        return false;
+    }
+
+    public function update(FormModel $form_model, Post $post): false|Post
+    {
+        $post->content = $form_model->getItem('content');
+        $post->user_id = $form_model->getItem('user_id');
+        if ($post->save()){
+            return $post;
+        }
+
+        return false;
+    }
+}