microexpansion/modules/item_transfer/exporter.lua

-- microexpansion/machines.lua

local me = microexpansion
local item_transfer = me.item_transfer
local access_level = microexpansion.constants.security.access_levels

local function exporter_timer(pos, elapsed)
	local net, cp = me.get_connected_network(pos)
	if not net then
		return false
	end
	local node = minetest.get_node(pos)
	local target = vector.add(pos, microexpansion.facedir_to_right_dir(node.param2))
	--TODO: allow setting list with control upgrade
	--TODO: perhaps allow setting limits with control upgrade
	local list, inv = item_transfer.get_input_inventory(target)
	if list then
		--TODO: move more with upgrades
		local own_inv = minetest.get_meta(pos):get_inventory()
		local upgrades = me.count_upgrades(own_inv)
		local export_filter = upgrades.filter and function(stack)
			return not own_inv:contains_item("filter",stack:peek_item())
		end
		local max_count = math.pow(2, upgrades.bulk or 0)
		microexpansion.move_inv({inv=net:get_inventory(),name="main",huge=true}, {inv=inv,name=list}, max_count, export_filter)
		--TODO: perhaps call allow_insert and on_insert callbacks
	end
	return true
end

-- [MicroExpansion Exporter] Register node
item_transfer.register_io_device("exporter", {
	description = "ME exporter",
	usedfor = "Exports items from ME Networks into machines",
	tiles = {
		"exporter",
		"exporter",
		"interface",
		"cable",
		"microexpansion_exporter.png^[transform4",
		"exporter",
	},
	drawtype = "nodebox",
	node_box = {
		--perhaps convert to connectable
		type = "fixed",
		fixed = {
			{-0.5, -0.25, -0.25, 0.25,  0.25, 0.25},
			{0.25, -0.375, -0.375, 0.5,  0.375, 0.375},
		},
	},
	connect_sides = { "left" },
	recipe = {
		{ 1, {
        {"", "basic_materials:ic", iron_ingot_ingredient },
        {"", "microexpansion:cable", "group:shovel" },
        {"", "", iron_ingot_ingredient },
      },
    },
    { 1, {
        {"", "microexpansion:logic_chip", iron_ingot_ingredient },
        {"", "microexpansion:cable", "group:shovel" },
        {"", "", iron_ingot_ingredient },
      },
    }
  },
	groups = { crumbly = 1 },
	on_timer = exporter_timer,
	on_construct = function(pos)
		item_transfer.setup_io_device("ME Exporter",pos)
		me.send_event(pos,"connect")
		--perhaps write a propper update self function
		item_transfer.update_timer_based(pos,nil,{type="construct"})
	end,
	after_destruct = function(pos)
		minetest.get_node_timer(pos):stop()
		me.send_event(pos,"disconnect")
  end,
	on_metadata_inventory_put = function(pos, listname, _, stack, player)
		if listname == "upgrades" then
			item_transfer.setup_io_device("ME Exporter",pos)
		end
	end,
	on_metadata_inventory_take = function(pos, listname, _, stack, player)
		if listname == "upgrades" then
			item_transfer.setup_io_device("ME Exporter",pos)
		end
	end
})

if me.uinv_category_enabled then
	unified_inventory.add_category_item("storage", "microexpansion:exporter")
end