grouping mail archive by year-month

src/main/java/de/srsoftware/widerhall/web/Rest.java

@@ -14,7 +14,6 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.lang.reflect.Member;
 import java.sql.SQLException;
 import java.util.HashMap;
 import java.util.List;
@@ -62,17 +61,22 @@ public class Rest extends HttpServlet {
         return Map.of(SUCCESS,"Updated user permissions");
     }
 
-    private List<? extends Object> archive(HttpServletRequest req) {
+    private Map<String, Object> archive(HttpServletRequest req) {
         var list = Util.getMailingList(req);
         if (list != null){
             try {
-                return Post.find(list).stream().map(Post::safeMap).toList();
+                var month = req.getParameter(MONTH);
+                if (month == null || month.isBlank()) {
+                    return Map.of(LIST,list.email(),"summary",Post.summarize(list));
+                } else {
+                    return Map.of(LIST,list.email(),"posts",Post.find(list,month).stream().map(Post::safeMap).toList());
+                }
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
         LOG.debug("list: {}",list.email());
-        return List.of();
+        return Map.of();
     }
 
     @Override