Improve and clean up luacontroller digiline_send on globalstep feature

mesecons_luacontroller/init.lua

@@ -2,7 +2,7 @@
 -- ports = get_real_portstates(pos): gets if inputs are powered from outside
 -- newport = merge_portstates(state1, state2): just does result = state1 or state2 for every port
 -- action_setports(pos, rule, state): activates/deactivates the mesecons according to the portstates (helper for action)
--- action(pos, ports, digiline_msgs): Applies new portstates to a luacontroller at pos, and sends pending digiline messages
+-- action(pos, ports): Applies new portstates to a luacontroller at pos
 -- lc_update(pos): updates the controller at pos by executing the code
 -- reset_meta (pos, code, errmsg): performs a software-reset, installs new code and prints error messages
 -- reset (pos): performs a hardware reset, turns off all ports
@@ -99,7 +99,7 @@ local setport = function (pos, rule, state)
 	end
 end
 
-local action = function (pos, ports, digiline_msgs)
+local action = function (pos, ports)
 	local node = minetest.get_node(pos)
 	local name = node.name
 	local vports = minetest.registered_nodes[name].virtual_portstates
@@ -116,13 +116,6 @@ local action = function (pos, ports, digiline_msgs)
 		if ports.c ~= vports.c then setport(pos, rules.c, ports.c) end
 		if ports.d ~= vports.d then setport(pos, rules.d, ports.d) end
 	end
-
-	if digiline then
-		for i = 1, #digiline_msgs do
-			digiline:receptor_send(pos, digiline.rules.default,
-			    digiline_msgs[i].channel, digiline_msgs[i].msg)
-		end
-	end
 end
 
 --------------------
@@ -241,6 +234,16 @@ local gettimer = function(pos)
 	return timer
 end
 
+local getdigiline_send = function(pos)
+	if not digiline then return end
+	-- Send messages on next serverstep
+	return function(channel, msg)
+		minetest.after(0, function()
+			digiline:receptor_send(pos, digiline.rules.default, channel, msg)
+		end)
+	end
+end
+
 local create_environment = function(pos, mem, event)
 	-- Gather variables for the environment
 	local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
@@ -253,10 +256,7 @@ local create_environment = function(pos, mem, event)
 			port = vports,
 			interrupt = getinterrupt(pos),
 			timer = gettimer(pos),
-			digiline_msgs = {},
-			digiline_send = function(channel, msg)
-				table.insert(lc_digiline_msgs, {["channel"]=channel, ["msg"]=msg})
-			end,
+			digiline_send = getdigiline_send(pos),
 			mem = mem,
 			tostring = tostring,
 			tonumber = tonumber,
@@ -373,7 +373,6 @@ end
 -- Parsing function --
 ----------------------
 
-lc_digiline_msgs = nil
 lc_update = function (pos, event)
 	local meta = minetest.get_meta(pos)
 	if not interrupt_allow(meta, event) then return end
@@ -385,11 +384,10 @@ lc_update = function (pos, event)
 
 	-- make sure code is ok and create environment
 	local prohibited = code_prohibited(code)
-	if 	prohibited then return prohibited end
+	if prohibited then return prohibited end
 	local env = create_environment(pos, mem, event)
 
 	-- create the sandbox and execute code
-	lc_digiline_msgs = {}
 	local chunk, msg = create_sandbox (code, env)
 	if not chunk then return msg end
 	local success, msg = pcall(f)
@@ -398,8 +396,8 @@ lc_update = function (pos, event)
 
 	save_memory(meta, mem)
 
-	-- Actually set the ports and send digiline messages
-	minetest.after(0, action, pos, env.port, lc_digiline_msgs)
+	-- Actually set the ports
+	minetest.after(0, action, pos, env.port)
 end
 
 local reset_meta = function(pos, code, errmsg)
@@ -418,7 +416,7 @@ end
 
 local reset = function (pos)
 	minetest.get_meta(pos):set_string("lc_interrupts", "")
-	action(pos, {a=false, b=false, c=false, d=false}, {})
+	action(pos, {a=false, b=false, c=false, d=false})
 end
 
 --        ______