<?php

declare(strict_types=1);

namespace AC\Formatter\Post;

use AC\Exception\ValueNotFoundException;
use AC\Formatter;
use AC\Type\Value;

class Excerpt implements Formatter
{
    public function format(Value $value): Value
    {
        $post = get_post($value->get_id());
        $excerpt = $post ? $post->post_excerpt : null;

        if (! $excerpt) {
            throw ValueNotFoundException::from_id($value->get_id());
        }

        return $value->with_value(
            $excerpt
        );
    }

}
