Add new SystemChatMessage and handle in server

protocol/src/protocol/packet.rs

@@ -911,6 +911,13 @@ state_packets!(
                 field nodes: LenPrefixed<VarInt, packet::CommandNode> =,
                 field root_index: VarInt =,
             }
+            /// SystemChatMessage is sent by the server for system messages, the system/chat
+            /// distinction exists to respect the user's chat visibility settings.
+            packet SystemChatMessage {
+                field message: format::Component =,
+                /// Whether the message is an actionbar or chat message
+                field overlay: bool =,
+            }
             /// ServerMessage is a message sent by the server. It could be from a player
             /// or just a system message. The Type field controls the location the
             /// message is displayed at and when the message is displayed.

protocol/src/protocol/versions/v1_19.rs

@@ -155,7 +155,7 @@ protocol_packet_ids!(
             0x5c => EntitySoundEffect
             0x5d => SoundEffect
             0x5e => StopSound
-            //0x5f => SystemChatMessage // TODO
+            0x5f => SystemChatMessage
             0x60 => PlayerListHeaderFooter
             0x61 => NBTQueryResponse
             0x62 => CollectItem

src/server/mod.rs

@@ -680,6 +680,7 @@ impl Server {
                             UpdateSign_u16 => on_sign_update_u16,
                             PlayerInfo => on_player_info,
                             PlayerInfo_String => on_player_info_string,
+                            SystemChatMessage => on_system_chat_message,
                             ServerMessage_NoPosition => on_servermessage_noposition,
                             ServerMessage_Position => on_servermessage_position,
                             ServerMessage_Sender => on_servermessage_sender,
@@ -1996,6 +1997,14 @@ impl Server {
         }
     }
 
+    fn on_system_chat_message(
+        &mut self,
+        m: packet::play::clientbound::SystemChatMessage,
+    ) {
+        // TODO: flag as system message (vs chat message)
+        self.on_servermessage(&m.message, None, None);
+    }
+
     fn on_servermessage_noposition(
         &mut self,
         m: packet::play::clientbound::ServerMessage_NoPosition,