From 46f5e6138ee479f6350da6324fee11e625638877 Mon Sep 17 00:00:00 2001
From: Yisroel Baum <yisroel.d.baum@gmail.com>
Date: Tue, 26 May 2026 19:59:09 +0300
Subject: [PATCH] add get element use case

---
 .../UseCases/GetElement/GetElement.php        | 33 +++++++++++++++++++
 .../UseCases/GetElement/GetElementRequest.php | 10 ++++++
 backend/app/Exceptions/NotFoundException.php  |  9 +++++
 3 files changed, 52 insertions(+)
 create mode 100644 backend/app/Element/UseCases/GetElement/GetElement.php
 create mode 100644 backend/app/Element/UseCases/GetElement/GetElementRequest.php
 create mode 100644 backend/app/Exceptions/NotFoundException.php

diff --git a/backend/app/Element/UseCases/GetElement/GetElement.php b/backend/app/Element/UseCases/GetElement/GetElement.php
new file mode 100644
index 0000000..2dc555e
--- /dev/null
+++ b/backend/app/Element/UseCases/GetElement/GetElement.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Element\UseCases\GetElement;
+
+use App\Element\Element;
+use App\Element\ElementRepository;
+use App\Exceptions\BadRequestException;
+use App\Exceptions\NotFoundException;
+
+class GetElement
+{
+    public function __construct(private ElementRepository $elementRepository)
+    {
+    }
+
+    /**
+     * @throws BadRequestException
+     * @throws NotFoundException
+     */
+    public function execute(GetElementRequest $request): Element
+    {
+        if ($request->id === null) {
+            throw new BadRequestException('id is required');
+        }
+
+        $element = $this->elementRepository->find($request->id);
+        if ($element === null) {
+            throw new NotFoundException('Element not found');
+        }
+
+        return $element;
+    }
+}
diff --git a/backend/app/Element/UseCases/GetElement/GetElementRequest.php b/backend/app/Element/UseCases/GetElement/GetElementRequest.php
new file mode 100644
index 0000000..0e636b6
--- /dev/null
+++ b/backend/app/Element/UseCases/GetElement/GetElementRequest.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Element\UseCases\GetElement;
+
+class GetElementRequest
+{
+    public function __construct(public ?int $id)
+    {
+    }
+}
diff --git a/backend/app/Exceptions/NotFoundException.php b/backend/app/Exceptions/NotFoundException.php
new file mode 100644
index 0000000..38beffa
--- /dev/null
+++ b/backend/app/Exceptions/NotFoundException.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Exceptions;
+
+use DomainException;
+
+class NotFoundException extends DomainException
+{
+}