Implement creator studio and upload updates

app/Services/Sitemaps/SitemapIndexService.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Sitemaps;
+
+final class SitemapIndexService
+{
+    public function __construct(
+        private readonly SitemapRegistry $registry,
+        private readonly SitemapShardService $shards,
+    ) {
+    }
+
+    /**
+     * @return list<SitemapIndexItem>
+     */
+    public function items(?array $families = null): array
+    {
+        $items = [];
+
+        foreach ($families ?? (array) config('sitemaps.enabled', []) as $name) {
+            $builder = $this->registry->get((string) $name);
+
+            if ($builder === null) {
+                continue;
+            }
+
+            $items[] = new SitemapIndexItem(
+                url('/sitemaps/' . $this->shards->rootEntryName($builder) . '.xml'),
+                $builder->lastModified(),
+            );
+        }
+
+        return $items;
+    }
+
+    /**
+     * @return list<SitemapIndexItem>
+     */
+    public function itemsForBuilder(SitemapBuilder $builder): array
+    {
+        if ($builder instanceof ShardableSitemapBuilder && $this->shards->shardCount($builder) > 1) {
+            $items = [];
+
+            foreach (range(1, $this->shards->shardCount($builder)) as $shard) {
+                $items[] = new SitemapIndexItem(
+                    url('/sitemaps/' . $this->shards->canonicalShardName($builder->name(), $shard) . '.xml'),
+                    $builder->lastModifiedForShard($shard),
+                );
+            }
+
+            return $items;
+        }
+
+        return [new SitemapIndexItem(
+            url('/sitemaps/' . $this->shards->rootEntryName($builder) . '.xml'),
+            $builder->lastModified(),
+        )];
+    }
+}