5 files changed, 29 insertions, 13 deletions
diff --git a/src/bridge/bridge.cpp b/src/bridge/bridge.cpp
index 0d6ade3..2da1d96 100644
--- a/src/bridge/bridge.cpp
+++ b/src/bridge/bridge.cpp
@@ -254,15 +254,16 @@ void Bridge::send_channel_message(const Iid& iid, const std::string& body)
       else
         irc->send_channel_message(iid.get_local(), line);
 
+      std::string uuid;
 #ifdef USE_DATABASE
       const auto xmpp_body = this->make_xmpp_body(line);
       if (this->record_history)
-        Database::store_muc_message(this->get_bare_jid(), iid, std::chrono::system_clock::now(),
+        uuid = Database::store_muc_message(this->get_bare_jid(), iid, std::chrono::system_clock::now(),
                                     std::get<0>(xmpp_body), irc->get_own_nick());
 #endif
       for (const auto& resource: this->resources_in_chan[iid.to_tuple()])
-        this->xmpp.send_muc_message(std::to_string(iid), irc->get_own_nick(),
-                                    this->make_xmpp_body(line), this->user_jid + "/" + resource);
+        this->xmpp.send_muc_message(std::to_string(iid), irc->get_own_nick(), this->make_xmpp_body(line),
+                                    this->user_jid + "/" + resource, uuid);
     }
 }
 
@@ -839,8 +840,8 @@ void Bridge::send_message(const Iid& iid, const std::string& nick, const std::st
 #endif
       for (const auto& resource: this->resources_in_chan[iid.to_tuple()])
         {
-          this->xmpp.send_muc_message(std::to_string(iid), nick,
-                                      this->make_xmpp_body(body, encoding), this->user_jid + "/" + resource);
+          this->xmpp.send_muc_message(std::to_string(iid), nick, this->make_xmpp_body(body, encoding),
+                                      this->user_jid + "/" + resource, {});
 
         }
     }
diff --git a/src/database/database.cpp b/src/database/database.cpp
index 71b0c37..9f310da 100644
--- a/src/database/database.cpp
+++ b/src/database/database.cpp
@@ -119,14 +119,16 @@ db::IrcChannelOptions Database::get_irc_channel_options_with_server_and_global_d
   return coptions;
 }
 
-void Database::store_muc_message(const std::string& owner, const Iid& iid,
-                                 Database::time_point date,
-                                 const std::string& body,
-                                 const std::string& nick)
+std::string Database::store_muc_message(const std::string& owner, const Iid& iid,
+                                        Database::time_point date,
+                                        const std::string& body,
+                                        const std::string& nick)
 {
   db::MucLogLine line(*Database::db);
 
-  line.uuid = Database::gen_uuid();
+  auto uuid = Database::gen_uuid();
+
+  line.uuid = uuid;
   line.owner = owner;
   line.ircChanName = iid.get_local();
   line.ircServerName = iid.get_server();
@@ -135,6 +137,8 @@ void Database::store_muc_message(const std::string& owner, const Iid& iid,
   line.nick = nick;
 
   line.update();
+
+  return uuid;
 }
 
 std::vector<db::MucLogLine> Database::get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
diff --git a/src/database/database.hpp b/src/database/database.hpp
index 1665a9a..b08a175 100644
--- a/src/database/database.hpp
+++ b/src/database/database.hpp
@@ -50,7 +50,7 @@ public:
                                                                                       const std::string& channel);
   static std::vector<db::MucLogLine> get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
                                                   int limit=-1, const std::string& start="", const std::string& end="");
-  static void store_muc_message(const std::string& owner, const Iid& iid,
+  static std::string store_muc_message(const std::string& owner, const Iid& iid,
                                 time_point date, const std::string& body, const std::string& nick);
 
   static void close();
diff --git a/src/xmpp/xmpp_component.cpp b/src/xmpp/xmpp_component.cpp
index 6829cef..8335c8a 100644
--- a/src/xmpp/xmpp_component.cpp
+++ b/src/xmpp/xmpp_component.cpp
@@ -380,7 +380,7 @@ void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, cons
   this->send_stanza(message);
 }
 
-void XmppComponent::send_muc_message(const std::string& muc_name, const std::string& nick, Xmpp::body&& xmpp_body, const std::string& jid_to)
+void XmppComponent::send_muc_message(const std::string& muc_name, const std::string& nick, Xmpp::body&& xmpp_body, const std::string& jid_to, std::string uuid)
 {
   Stanza message("message");
   message["to"] = jid_to;
@@ -402,6 +402,15 @@ void XmppComponent::send_muc_message(const std::string& muc_name, const std::str
       // Pass the ownership of the pointer to this xmlnode
       html.add_child(std::move(std::get<1>(xmpp_body)));
     }
+
+  if (!uuid.empty())
+    {
+      XmlSubNode stanza_id(message, "stanza-id");
+      stanza_id["xmlns"] = STABLE_ID_NS;
+      stanza_id["by"] = muc_name + "@" + this->served_hostname;
+      stanza_id["id"] = std::move(uuid);
+    }
+
   this->send_stanza(message);
 }
 
diff --git a/src/xmpp/xmpp_component.hpp b/src/xmpp/xmpp_component.hpp
index 250f0a8..8eabaf6 100644
--- a/src/xmpp/xmpp_component.hpp
+++ b/src/xmpp/xmpp_component.hpp
@@ -33,6 +33,7 @@
 #define DATAFORM_NS      "jabber:x:data"
 #define RSM_NS           "http://jabber.org/protocol/rsm"
 #define MUC_TRAFFIC_NS   "http://jabber.org/protocol/muc#traffic"
+#define STABLE_ID_NS     "urn:xmpp:sid:0"
 
 /**
  * An XMPP component, communicating with an XMPP server using the protocole
@@ -134,7 +135,8 @@ public:
   /**
    * Send a (non-private) message to the MUC
    */
-  void send_muc_message(const std::string& muc_name, const std::string& nick, Xmpp::body&& body, const std::string& jid_to);
+  void send_muc_message(const std::string& muc_name, const std::string& nick, Xmpp::body&& body, const std::string& jid_to,
+                        std::string uuid);
   /**
    * Send a message, with a <delay/> element, part of a MUC history
    */