From a5e566fc7aab9e5e6caef85adf7af665ae0bae5a Mon Sep 17 00:00:00 2001
From: DS-Minetest <vorunbekannt75@web.de>
Date: Mon, 24 Jul 2017 16:18:47 +0200
Subject: [PATCH] (try to) improve performance

---
 README.md | 10 ++++++----
 init.lua  | 54 ++++++++++++++++++++++++++++++++++++++++++------------
 2 files changed, 48 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index dbfb4df..96017ec 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,9 @@
 
 ## Added functions are:
 ### For client:
-- `csm_com.register_on_receive(func(msg))`
+- `csm_com.register_on_receive(func(msg)[, prefix])`
+`prefix` should be a string. Try not to use many different prefixes,
+one per mod should be enough.
 If function returns `true`, remaining functions are not called.
 - `csm_com.send(msg)`
 - `csm_com.server_has()`
@@ -13,10 +15,10 @@ returns `true` if server has this mod installed
 - `csm_com.register_on_know(func())`
 Called when `csm_com.server_has()` becomes `true`.
 ### For server:
-- `csm_com.register_on_receive(func(player_name, msg))`
-same as above
+- `csm_com.register_on_receive(func(player_name, msg)[, prefix])`
+same as above.
 - `csm_com.send(player_name, msg)`
 - `csm_com.player_has(player_name)`
 returns `true` if player has this mod installed
 - `csm_com.register_on_know(func(player_name))`
-same as above
+same as above.
diff --git a/init.lua b/init.lua
index 1208c52..2fd21af 100644
--- a/init.lua
+++ b/init.lua
@@ -20,20 +20,35 @@ local csm_player_a = "I have csm."
 
 if INIT == "client" then
 	local funcs = {}
-	function csm_com.register_on_receive(f)
-		funcs[#funcs+1] = f
+	local funcsp = {}
+	function csm_com.register_on_receive(f, p)
+		if p then
+			funcsp[p][#funcsp[p]+1] = f
+		else
+			funcs[#funcs+1] = f
+		end
 	end
 
-	minetest.register_on_receiving_chat_message(function(message)
-		if message:sub(1, #prefix_c) ~= prefix_c then
+	minetest.register_on_receiving_chat_message(function(msg)
+		if msg:sub(1, #prefix_c) ~= prefix_c then
 			return
 		end
-		message = message:sub(#prefix_c+1)
-		for i = 1, #funcs do
-			if funcs[i](message) then
+		msg = msg:sub(#prefix_c+1)
+		for pre, fs in pairs(funcsp) do
+			if msg:sub(1, #pre) == pre then
+				for i = 1, #fs do
+					if fs[i](msg) then
+						return true
+					end
+				end
 				break
 			end
 		end
+		for i = 1, #funcs do
+			if funcs[i](msg) then
+				return true
+			end
+		end
 		return true
 	end)
 
@@ -71,19 +86,34 @@ if INIT == "client" then
 
 elseif INIT == "game" then
 	local funcs = {}
-	function csm_com.register_on_receive(f)
-		funcs[#funcs+1] = f
+	local funcsp = {}
+	function csm_com.register_on_receive(f, p)
+		if p then
+			funcsp[p][#funcsp[p]+1] = f
+		else
+			funcs[#funcs+1] = f
+		end
 	end
 
-	local funco = minetest.registered_chatcommands["status"].func
+	local status_o = minetest.registered_chatcommands["status"].func
 	minetest.override_chatcommand("status", {func = function(name, param)
 		if param:sub(1, #prefix_s) ~= prefix_s then
-			return funco(name, param)
+			return status_o(name, param)
 		end
 		param = param:sub(#prefix_s+1)
+		for pre, fs in pairs(funcsp) do
+			if param:sub(1, #pre) == pre then
+				for i = 1, #fs do
+					if fs[i](name, param) then
+						return true
+					end
+				end
+				break
+			end
+		end
 		for i = 1, #funcs do
 			if funcs[i](name, param) then
-				break
+				return true
 			end
 		end
 		return false