adding Projects feature (#85)

app/Actions/Projects/CreateProject.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Actions\Projects;
+
+use App\Models\Project;
+use App\Models\User;
+use Illuminate\Support\Facades\Validator;
+
+class CreateProject
+{
+    public function create(User $user, array $input): Project
+    {
+        $this->validate($user, $input);
+
+        $project = new Project([
+            'user_id' => $user->id,
+            'name' => $input['name'],
+        ]);
+
+        $project->save();
+
+        return $project;
+    }
+
+    private function validate(User $user, array $input): void
+    {
+        Validator::make($input, [
+            'name' => [
+                'required',
+                'string',
+                'max:255',
+                'unique:projects,name,NULL,id,user_id,'.$user->id,
+            ],
+        ])->validate();
+    }
+}