From 32cbf4229c0196741b9966613cece6e42997c3ad Mon Sep 17 00:00:00 2001
From: yisroel <tech@bhbsdventures.com>
Date: Wed, 6 May 2026 15:25:07 +0300
Subject: [PATCH] implement ListUserPosts use case

validates userId > 0, delegates to PostRepository->findByUserId.
54 tests pass.
---
 .../UseCases/ListUserPosts/ListUserPosts.php  | 28 +++++++++++++++++++
 .../ListUserPosts/ListUserPostsRequest.php    | 10 +++++++
 2 files changed, 38 insertions(+)
 create mode 100644 backend/app/Post/UseCases/ListUserPosts/ListUserPosts.php
 create mode 100644 backend/app/Post/UseCases/ListUserPosts/ListUserPostsRequest.php

diff --git a/backend/app/Post/UseCases/ListUserPosts/ListUserPosts.php b/backend/app/Post/UseCases/ListUserPosts/ListUserPosts.php
new file mode 100644
index 0000000..c0c305e
--- /dev/null
+++ b/backend/app/Post/UseCases/ListUserPosts/ListUserPosts.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Post\UseCases\ListUserPosts;
+
+use App\Exceptions\BadRequestException;
+use App\Post\Post;
+use App\Post\PostRepository;
+
+class ListUserPosts
+{
+    public function __construct(
+        private PostRepository $postRepo,
+    ) {}
+
+    /**
+     * @return Post[]
+     *
+     * @throws BadRequestException
+     */
+    public function execute(ListUserPostsRequest $request): array
+    {
+        if ($request->userId <= 0) {
+            throw new BadRequestException('userId must be positive');
+        }
+
+        return $this->postRepo->findByUserId($request->userId);
+    }
+}
diff --git a/backend/app/Post/UseCases/ListUserPosts/ListUserPostsRequest.php b/backend/app/Post/UseCases/ListUserPosts/ListUserPostsRequest.php
new file mode 100644
index 0000000..6a5a6a5
--- /dev/null
+++ b/backend/app/Post/UseCases/ListUserPosts/ListUserPostsRequest.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Post\UseCases\ListUserPosts;
+
+class ListUserPostsRequest
+{
+    public function __construct(
+        public int $userId,
+    ) {}
+}