Allow customizing chat message format (#8529)

builtin/game/chat.lua

@@ -1,4 +1,29 @@
--- Minetest: builtin/game/chatcommands.lua
+-- Minetest: builtin/game/chat.lua
+
+--
+-- Chat message formatter
+--
+
+-- Implemented in Lua to allow redefinition
+function core.format_chat_message(name, message)
+	local str = core.settings:get("chat_message_format")
+	local error_str = "Invalid chat message format - missing %s"
+	local i
+
+	str, i = str:gsub("@name", name, 1)
+	if i == 0 then
+		error(error_str:format("@name"), 2)
+	end
+
+	str, i = str:gsub("@message", message, 1)
+	if i == 0 then
+		error(error_str:format("@message"), 2)
+	end
+
+	str = str:gsub("@timestamp", os.date("%H:%M:%S", os.time()), 1)
+
+	return str
+end
 
 --
 -- Chat command handler

builtin/game/init.lua

@@ -1,37 +1,37 @@
 
 local scriptpath = core.get_builtin_path()
-local commonpath = scriptpath.."common"..DIR_DELIM
+local commonpath = scriptpath .. "common" .. DIR_DELIM
-local gamepath = scriptpath.."game"..DIR_DELIM
+local gamepath   = scriptpath .. "game".. DIR_DELIM
 
 -- Shared between builtin files, but
 -- not exposed to outer context
 local builtin_shared = {}
 
-dofile(commonpath.."vector.lua")
+dofile(commonpath .. "vector.lua")
 
-dofile(gamepath.."constants.lua")
+dofile(gamepath .. "constants.lua")
-assert(loadfile(gamepath.."item.lua"))(builtin_shared)
+assert(loadfile(gamepath .. "item.lua"))(builtin_shared)
-dofile(gamepath.."register.lua")
+dofile(gamepath .. "register.lua")
 
 if core.settings:get_bool("profiler.load") then
-	profiler = dofile(scriptpath.."profiler"..DIR_DELIM.."init.lua")
+	profiler = dofile(scriptpath .. "profiler" .. DIR_DELIM .. "init.lua")
 end
 
 dofile(commonpath .. "after.lua")
-dofile(gamepath.."item_entity.lua")
+dofile(gamepath .. "item_entity.lua")
-dofile(gamepath.."deprecated.lua")
+dofile(gamepath .. "deprecated.lua")
-dofile(gamepath.."misc.lua")
+dofile(gamepath .. "misc.lua")
-dofile(gamepath.."privileges.lua")
+dofile(gamepath .. "privileges.lua")
-dofile(gamepath.."auth.lua")
+dofile(gamepath .. "auth.lua")
 dofile(commonpath .. "chatcommands.lua")
-dofile(gamepath.."chatcommands.lua")
+dofile(gamepath .. "chat.lua")
 dofile(commonpath .. "information_formspecs.lua")
-dofile(gamepath.."static_spawn.lua")
+dofile(gamepath .. "static_spawn.lua")
-dofile(gamepath.."detached_inventory.lua")
+dofile(gamepath .. "detached_inventory.lua")
-assert(loadfile(gamepath.."falling.lua"))(builtin_shared)
+assert(loadfile(gamepath .. "falling.lua"))(builtin_shared)
-dofile(gamepath.."features.lua")
+dofile(gamepath .. "features.lua")
-dofile(gamepath.."voxelarea.lua")
+dofile(gamepath .. "voxelarea.lua")
-dofile(gamepath.."forceloading.lua")
+dofile(gamepath .. "forceloading.lua")
-dofile(gamepath.."statbars.lua")
+dofile(gamepath .. "statbars.lua")
 
 profiler = nil

builtin/settingtypes.txt

@@ -1058,6 +1058,10 @@ disable_anticheat (Disable anticheat) bool false
 #    This option is only read when server starts.
 enable_rollback_recording (Rollback recording) bool false
 
+#    Format of player chat messages. The following strings are valid placeholders:
+#    @name, @message, @timestamp (optional)
+chat_message_format (Chat message format) string <@name> @message
+
 #    A message to be displayed to all clients when the server shuts down.
 kick_msg_shutdown (Shutdown message) string Server shutting down.