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generated by cgit v1.2.3 (git 2.39.1) at 2025-01-01 15:24:20 +0000
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-- atc_rail.lua
-- registers and handles the ATC rail. Active component.
-- This is the only component that can interface with trains, so train interface goes here too.

--Using subtable
local r={}

function r.fire_event(pos, evtdata)
	
	local ph=minetest.pos_to_string(pos)
	local railtbl = atlatc.active.nodes[ph]
	
	if not railtbl then
		atwarn("LuaAutomation ATC interface rail at",ph,": Data not in memory! Please visit position and click 'Save'!")
		return
	end
	
	
	local arrowconn = railtbl.arrowconn
	if not arrowconn then
		atwarn("LuaAutomation ATC interface rail at",ph,": Incomplete Data! Please visit position and click 'Save'!")
		return
	end
	
	--prepare ingame API for ATC. Regenerate each time since pos needs to be known
	--If no train, then return false.
	local train_id=advtrains.get_train_at_pos(pos)
	local train, atc_arrow, tvel
	if train_id then train=advtrains.trains[train_id] end
	if train then 
		if not train.path then
			--we happened to get in between an invalidation step
			--delay
			atlatc.interrupt.add(0,pos,evtdata)
			return
		end
		local index = advtrains.path_lookup(train, pos)
				
		local iconnid = 1
		if index then
			iconnid = train.path_cn[index]
		else
			atwarn("ATC rail at", pos, ": Rail not on train's path! Can't determine arrow direction. Assuming +!")
		end
		atc_arrow = iconnid == 1
		
		tvel=train.velocity
	end
	local customfct={
		atc_send = function(cmd)
			if not train_id then return false end
			assertt(cmd, "string")
			advtrains.atc.train_set_command(train, cmd, atc_arrow)
			return true
		end,
		split_at_index = function(index, cmd)
			if not train_id then return false end
			assertt(cmd, "string")
			if type(index) ~= "number" then
				return false
			end
			local new_id = advtrains.split_train_at_index(train, index)
			if new_id then
				minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
				return true
			end
			return false
		end,
		set_shunt = function()
			-- enable shunting mode
			if not train_id then return false end
			train.is_shunt = true
		end,
		set_line = function(line)
			if type(line)~="string" and type(line)~="number" then
				return false
			end
			train.line = line .. ""