<?php

namespace App\Post\UseCases\DeletePost;

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

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

    /**
     * @throws BadRequestException
     * @throws ForbiddenException
     */
    public function execute(DeletePostRequest $request): void
    {
        if ($request->postId <= 0) {
            throw new BadRequestException('postId must be positive');
        }
        if ($request->requesterId <= 0) {
            throw new BadRequestException('requesterId must be positive');
        }

        $post = $this->postRepo->find($request->postId);
        if ($post === null) {
            return;
        }

        $isAuthor = $post->getUserId() === $request->requesterId;
        if (! $isAuthor && ! $request->requesterIsAdmin) {
            throw new ForbiddenException(
                'requester is not allowed to delete this post'
            );
        }

        $this->postRepo->delete($request->postId);
    }
}