<?php
// SPDX-License-Identifier: GPL-3.0-or-later
declare(strict_types=1);

namespace Aiwend\WordPress;

/** The current text of a knowledge source as the single index would index it (posts: published content; uploads: the stored file), or null. */
final class SourceContent
{
    public function __construct(private Plugin $plugin)
    {
    }

    /** @param array<string, mixed> $source @return array{raw:string, type:string}|null */
    public function __invoke(array $source): ?array
    {
        $site = get_current_blog_id();
        if ((int) $source['site_id'] !== $site) {
            return null; // never read another site's content
        }
        if ($source['origin'] === 'post') {
            $post = get_post((int) $source['origin_ref']);
            if (!$post instanceof \WP_Post || !KnowledgeModule::isPublic($post)) {
                return null;
            }
            return ['raw' => strip_shortcodes((string) $post->post_content), 'type' => 'html'];
        }
        $blob = $this->plugin->sources()->blob($site, (int) $source['id']);
        return $blob === null ? null : ['raw' => $blob['content'], 'type' => $blob['type']];
    }
}