mesecons/mesecons/services.lua

-- Dig and place services

mesecon.on_placenode = function (pos, node)
	-- Receptors: Send on signal when active
	if mesecon:is_receptor_on(node.name) then
		mesecon:receptor_on(pos, mesecon:receptor_get_rules(node))
	end

	-- Conductors: Send turnon signal when powered or replace by respective offstate conductor
	-- if placed conductor is an onstate one
	if mesecon:is_conductor(node.name) then
		local sources = mesecon:is_powered(pos)
		if sources then
			-- also call receptor_on if itself is powered already, so that neighboring
			-- conductors will be activated (when pushing an on-conductor with a piston)
			for _, s in ipairs(sources) do
				local rule = {x = pos.x - s.x, y = pos.y - s.y, z = pos.z - s.z}
				mesecon:turnon(pos, rule)
			end
			--mesecon:receptor_on (pos, mesecon:conductor_get_rules(node))
		elseif mesecon:is_conductor_off(node.name) then
			minetest.swap_node(pos, {name = mesecon:get_conductor_off(node)})
		end
	end

	-- Effectors: Send changesignal and activate or deactivate
	if mesecon:is_effector(node.name) then
		if mesecon:is_powered(pos) then
			mesecon:changesignal(pos, node, mesecon:effector_get_rules(node), "on", 1)
			mesecon:activate(pos, node, nil, 1)
		else
			mesecon:changesignal(pos, node, mesecon:effector_get_rules(node), "off", 1)
			mesecon:deactivate(pos, node, nil, 1)
		end
	end
end

mesecon.on_dignode = function (pos, node)
	if mesecon:is_conductor_on(node) then
		mesecon:receptor_off(pos, mesecon:conductor_get_rules(node))
	elseif mesecon:is_receptor_on(node.name) then
		mesecon:receptor_off(pos, mesecon:receptor_get_rules(node))
	end
end

minetest.register_on_placenode(mesecon.on_placenode)
minetest.register_on_dignode(mesecon.on_dignode)

-- Overheating service for fast circuits

-- returns true if heat is too high
mesecon.do_overheat = function(pos)
	local meta = minetest.get_meta(pos)
	local heat = meta:get_int("heat") or 0

	heat = heat + 1
	meta:set_int("heat", heat)

	if heat < OVERHEAT_MAX then
		mesecon.queue:add_action(pos, "cooldown", {}, 1, nil, 0)
	else
		return true
	end

	return false
end


mesecon.queue:add_function("cooldown", function (pos)
	if minetest.get_item_group(minetest.get_node(pos).name, "overheat") == 0 then
		return -- node has been moved, this one does not use overheating - ignore
	end

	local meta = minetest.get_meta(pos)
	local heat = meta:get_int("heat")

	if (heat > 0) then
		meta:set_int("heat", heat - 1)
	end
end)