<?php

namespace App\Http\Controllers;

use App\Models\Site;
use Illuminate\Http\Response;

class SitemapController extends Controller
{
    /**
     * Lists every static page plus one URL per indexed site. Not paginated/sharded —
     * fine at current scale, but a single sitemap is only valid up to 50,000 URLs
     * (the sitemap protocol's hard limit), so this will need a sitemap index +
     * multiple child sitemaps if the site count ever approaches that.
     */
    public function __invoke(): Response
    {
        $sites = Site::select('id', 'updated_at')->orderBy('id')->get();

        $xml = view('sitemap', ['sites' => $sites])->render();

        return response($xml, 200)->header('Content-Type', 'application/xml');
    }
}