<?php

namespace App\Post\UseCases\CreatePost;

use App\Auth\Clock;
use App\Exceptions\BadRequestException;
use App\Post\CreatePostDto;
use App\Post\Post;
use App\Post\PostRepository;

class CreatePost
{
    public function __construct(
        private PostRepository $postRepo,
        private Clock $clock,
    ) {}

    /**
     * @throws BadRequestException
     */
    public function execute(CreatePostRequest $request): Post
    {
        $title = $request->title === null ? '' : trim($request->title);
        $body = $request->body === null ? '' : trim($request->body);

        if ($title === '') {
            throw new BadRequestException('title is required');
        }
        if ($body === '') {
            throw new BadRequestException('body is required');
        }

        return $this->postRepo->create(new CreatePostDto(
            userId: $request->userId,
            title: $title,
            body: $body,
            createdAt: $this->clock->now(),
        ));
    }
}