feat: rétroliens dans la sidebar des articles

src/ArticleManager.php

@@ -884,6 +884,28 @@ class ArticleManager
         );
     }
 
+    /**
+     * Retourne les articles publiés qui contiennent un lien vers /post/<slug>.
+     */
+    public function getBacklinks(string $slug, string $excludeUuid = ''): array
+    {
+        $pattern = '/post/' . $slug;
+        $result  = [];
+        foreach ($this->getAll(publishedOnly: true) as $article) {
+            if ($excludeUuid !== '' && $article['uuid'] === $excludeUuid) {
+                continue;
+            }
+            foreach ($article['external_links'] ?? [] as $link) {
+                $path = parse_url($link['url'] ?? '', PHP_URL_PATH) ?? '';
+                if ($path === $pattern || rtrim($path, '/') === $pattern) {
+                    $result[] = $article;
+                    break;
+                }
+            }
+        }
+        return $result;
+    }
+
     private function removeDir(string $dir): void
     {
         foreach (scandir($dir) as $entry) {