Update previous links

backend/app/services/link_service.py

@@ -109,6 +109,20 @@ def create_link(
     return record
 
 
+def find_owned_link_by_title_url(user_id: str, title: str, url: str) -> dict | None:
+    cleaned_url = clean_url(url)
+    with get_connection() as conn:
+        row = conn.execute(
+            'SELECT * FROM links WHERE user_id = ? AND title = ? AND url = ? ORDER BY created_at DESC LIMIT 1',
+            (user_id, title, cleaned_url),
+        ).fetchone()
+        if row is None:
+            return None
+        record = dict(row)
+        record['tags'] = get_link_tags(conn, record['id'])
+    return record
+
+
 def list_public_links(username: str | None = None):
     with get_connection() as conn:
         rows = conn.execute(