first commit

README.md

@@ -0,0 +1,18 @@
+## This mod gives server- and client-mods the possibility to communicate.
+
+### It should be installed on server and client.
+
+
+## Added functions are:
+### For client:
+- `csm_com.register_on_receive(func(msg))`
+If function returns `true`, remaining functions are not called.
+- `csm_com.send(msg)`
+- `csm_com.server_has()`
+returns `true` if server has this mod installed
+### For server:
+- `csm_com.register_on_receive(func(player_name, msg))`
+same as above
+- `csm_com.send(player_name, msg)`
+- `csm_com.player_has(player_name)`
+returns `true` if player has this mod installed

description.txt

@@ -0,0 +1 @@
+This mod gives server- and client-mods the possibility to communicate.

init.lua

@@ -0,0 +1,109 @@
+--[[
+
+  ____   ______ _____       ____  ____   _____
+_/ ___\ /  ___//     \    _/ ___\/  _ \ /     \
+\  \___ \___ \|  Y Y  \   \  \__(  <_> )  Y Y  \
+ \___  >____  >__|_|  /____\___  >____/|__|_|  /
+     \/     \/      \/_____/   \/            \/
+--]]
+
+local load_time_start = os.clock()
+local modname = minetest.get_current_modname()
+
+
+csm_com = {}
+
+local prefix_s = "Kill all humans!" -- A human would never write this.
+local prefix_c = "Psst, don't let your master hear this."
+local csm_player_q = "Do you have csm?"
+local csm_player_a = "I have csm."
+
+if INIT == "client" then
+	local funcs = {}
+	function csm_com.register_on_receive(f)
+		funcs[#funcs+1] = f
+	end
+
+	minetest.register_on_receiving_chat_message(function(message)
+		if message: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
+				break
+			end
+		end
+		return true
+	end)
+
+	function csm_com.send(msg)
+		minetest.run_server_chatcommand("status", prefix_s..msg)
+	end
+
+	local server_has_mod = false
+	csm_com.register_on_receive(function(msg)
+		if msg ~= csm_player_q then
+			return
+		end
+		server_has_mod = true
+		csm_com.send(csm_player_a)
+		return true
+	end)
+	function csm_com.server_has()
+		return server_has_mod
+	end
+
+elseif INIT == "game" then
+	local funcs = {}
+	function csm_com.register_on_receive(f)
+		funcs[#funcs+1] = f
+	end
+
+	local funco = 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)
+		end
+		param = param:sub(#prefix_s+1)
+		for i = 1, #funcs do
+			if funcs[i](name, param) then
+				break
+			end
+		end
+		return false
+	end})
+
+	function csm_com.send(player_name, msg)
+		minetest.chat_send_player(player_name, prefix_c..msg)
+	end
+
+	local csm_players = {}
+	minetest.register_on_joinplayer(function(player)
+		csm_com.send(player:get_player_name(), csm_player_q)
+	end)
+	csm_com.register_on_receive(function(name, answer)
+		if answer == csm_player_a then
+			csm_players[name] = true
+			return true
+		end
+	end)
+	minetest.register_on_leaveplayer(function(player, timed_out)
+		csm_players[player:get_player_name] = nil
+	end)
+	function csm_com.player_has(player_name)
+		return csm_players[palyer_name] or false
+	end
+
+else
+	print("csm_com is not made for such a use!")
+end
+
+
+local time = math.floor(tonumber(os.clock()-load_time_start)*100+0.5)/100
+local msg = "["..modname.."] loaded after ca. "..time
+if time > 0.05 then
+	print(msg)
+else
+	minetest.log("info", msg)
+end

mod.conf

@@ -0,0 +1 @@
+name = csm_com