<?php

namespace App\Post\UseCases\GetPost;

use App\Exceptions\BadRequestException;
use App\Post\Post;
use App\Post\PostRepository;

class GetPost
{
    public function __construct(
        private PostRepository $postRepo,
    ) {}

    /**
     * @throws BadRequestException
     */
    public function execute(int $id): ?Post
    {
        if ($id <= 0) {
            throw new BadRequestException('id must be positive');
        }

        return $this->postRepo->find($id);
    }
}