Include the <fin><set><first/><last/></></> nodes in the MAM iq result

fix #3322

src/xmpp/biboumi_component.cpp

@@ -725,7 +725,24 @@ bool BiboumiComponent::handle_mam_request(const Stanza& stanza)
           if (!line.col<Database::Nick>().empty())
             this->send_archived_message(line, to.full(), from.full(), query_id);
         }
-        this->send_iq_result_full_jid(id, from.full(), to.full());
+        {
+          auto fin_ptr = std::make_unique<XmlNode>("fin");
+          {
+            XmlNode& fin = *(fin_ptr.get());
+            fin["xmlns"] = MAM_NS;
+            XmlSubNode set(fin, "set");
+            set["xmlns"] = RSM_NS;
+            if (!lines.empty())
+              {
+                XmlSubNode first(set, "first");
+                first["index"] = "0";
+                first.set_inner(lines[0].col<Database::Uuid>());
+                XmlSubNode last(set, "last");
+                last.set_inner(lines[lines.size() - 1].col<Database::Uuid>());
+              }
+          }
+          this->send_iq_result_full_jid(id, from.full(), to.full(), std::move(fin_ptr));
+        }
         return true;
       }
   return false;

src/xmpp/xmpp_component.cpp

@@ -640,13 +640,15 @@ void XmppComponent::send_iq_version_request(const std::string& from,
   this->send_stanza(iq);
 }
 
-void XmppComponent::send_iq_result_full_jid(const std::string& id, const std::string& to_jid, const std::string& from_full_jid)
+void XmppComponent::send_iq_result_full_jid(const std::string& id, const std::string& to_jid, const std::string& from_full_jid, std::unique_ptr<XmlNode> inner)
 {
   Stanza iq("iq");
   iq["from"] = from_full_jid;
   iq["to"] = to_jid;
   iq["id"] = id;
   iq["type"] = "result";
+  if (inner)
+    iq.add_child(std::move(inner));
   this->send_stanza(iq);
 }
 

src/xmpp/xmpp_component.hpp

@@ -203,7 +203,7 @@ public:
    */
   void send_iq_result(const std::string& id, const std::string& to_jid, const std::string& from);
   void send_iq_result_full_jid(const std::string& id, const std::string& to_jid,
-                               const std::string& from_full_jid);
+                               const std::string& from_full_jid, std::unique_ptr<XmlNode> inner=nullptr);
 
   void handle_handshake(const Stanza& stanza);
   void handle_error(const Stanza& stanza);