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local autocrafterCache = {} -- caches some recipe data to avoid to call the slow function minetest.get_craft_result() every second
local craft_time = 1
local function count_index(invlist)
local index = {}
for _, stack in pairs(invlist) do
if not stack:is_empty() then
local stack_name = stack:get_name()
index[stack_name] = (index[stack_name] or 0) + stack:get_count()
end
end
return index
end
local function get_craft(pos, inventory, hash)
local hash = hash or minetest.hash_node_position(pos)
local craft = autocrafterCache[hash]
if not craft then
if inventory:is_empty("recipe") then return nil end
local recipe = inventory:get_list("recipe")
local output, decremented_input = minetest.get_craft_result({method = "normal", width = 3, items = recipe})
craft = {recipe = recipe, consumption=count_index(recipe), output = output, decremented_input = decremented_input}
autocrafterCache[hash] = craft
end
-- only return crafts that have an actual result
if not craft.output.item:is_empty() then
return craft
end
end
-- note, that this function assumes allready being updated to virtual items
-- and doesn't handle recipes with stacksizes > 1
local function on_recipe_change(pos, inventory)
-- if we emptied the grid, there's no point in keeping it running or cached
if inventory:is_empty("recipe") then
minetest.get_node_timer(pos):stop()
autocrafterCache[minetest.hash_node_position(pos)] = nil
return
end
local recipe_changed = false
local recipe = inventory:get_list("recipe")
local hash = minetest.hash_node_position(pos)
local craft = autocrafterCache[hash]
if craft then
-- check if it changed
local cached_recipe = craft.recipe
for i = 1, 9 do
if recipe[i]:get_name() ~= cached_recipe[i]:get_name() then
autocrafterCache[hash] = nil -- invalidate recipe
craft = nil
break
end
end
end
local timer = minetest.get_node_timer(pos)
if not timer:is_started() then
timer:start(craft_time)
end
end
local function on_inventory_change(pos, inventory)
local timer = minetest.get_node_timer(pos)
if not timer:is_started() then
timer:start(craft_time)
end
end
local function autocraft(inventory, craft)
if not craft then return false end
local output_item = craft.output.item
-- check if we have enough room in dst
if not inventory:room_for_item("dst", output_item) then return false end
local consumption = craft.consumption
local inv_index = count_index(inventory:get_list("src"))
-- check if we have enough material available
for itemname, number in pairs(consumption) do
if (not inv_index[itemname]) or inv_index[itemname] < number then return false end
end
-- consume material
for itemname, number in pairs(consumption) do
for i = 1, number do -- We have to do that since remove_item does not work if count > stack_max
inventory:remove_item("src", ItemStack(itemname))
end
end
-- craft the result into the dst inventory and add any "replacements" as well
inventory:add_item("dst", output_item)
for i = 1, 9 do
inventory:add_item("dst", craft.decremented_input.items[i])
end
return true
end
-- returns false to stop the timer, true to continue running
-- is started only from start_autocrafter(pos) after sanity checks and cached recipe
local function run_autocrafter(pos, elapsed)
local meta = minetest.get_meta(pos)
local inventory = meta:get_inventory()
local craft = get_craft(pos, inventory)
for step = 1, math.floor(elapsed/craft_time) do
local continue = autocraft(inventory, craft)
if not continue then return false end
end
return true
end
local function update_autocrafter(pos)
local meta = minetest.get_meta(pos)
if meta:get_string("virtual_items") == "" then
meta:set_string("virtual_items", "1")
local inv = meta:get_inventory()
for idx, stack in ipairs(inv:get_list("recipe")) do
minetest.item_drop(stack, "", pos)
stack:set_count(1)
stack:set_wear(0)
inv:set_stack("recipe", idx, stack)
end
on_recipe_change(pos, inv)
end
end
minetest.register_node("pipeworks:autocrafter", {
description = "Autocrafter",
drawtype = "normal",
tiles = {"pipeworks_autocrafter.png"},
groups = {snappy = 3, tubedevice = 1, tubedevice_receiver = 1},
tube = {insert_object = function(pos, node, stack, direction)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
local added = inv:add_item("src", stack)
on_inventory_change(pos, inv)
return added
end,
can_insert = function(pos, node, stack, direction)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
return inv:room_for_item("src", stack)
end,
input_inventory = "dst",
connect_sides = {left = 1, right = 1, front = 1, back = 1, top = 1, bottom = 1}},
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_string("formspec",
"size[8,11]"..
"list[current_name;recipe;0,0;3,3;]"..
"list[current_name;src;0,3.5;8,3;]"..
"list[current_name;dst;4,0;4,3;]"..
"list[current_player;main;0,7;8,4;]")
meta:set_string("infotext", "Autocrafter")
meta:set_string("virtual_items", "1")
local inv = meta:get_inventory()
inv:set_size("src", 3*8)
inv:set_size("recipe", 3*3)
inv:set_size("dst", 4*3)
end,
on_punch = update_autocrafter,
can_dig = function(pos, player)
update_autocrafter(pos)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
return (inv:is_empty("src") and inv:is_empty("dst"))
end,
after_place_node = function(pos)
pipeworks.scan_for_tube_objects(pos)
end,
after_dig_node = function(pos)
pipeworks.scan_for_tube_objects(pos)
autocrafterCache[minetest.hash_node_position(pos)] = nil
end,
allow_metadata_inventory_put = function(pos, listname, index, stack, player)
update_autocrafter(pos)
local inv = minetest.get_meta(pos):get_inventory()
if listname == "recipe" then
local stack_copy = ItemStack(stack)
stack_copy:set_count(1)
inv:set_stack(listname, index, stack_copy)
on_recipe_change(pos, inv)
return 0
else
on_inventory_change(pos, inv)
return stack:get_count()
end
end,
allow_metadata_inventory_take = function(pos, listname, index, stack, player)
update_autocrafter(pos)
local inv = minetest.get_meta(pos):get_inventory()
if listname == "recipe" then
inv:set_stack(listname, index, ItemStack(""))
on_recipe_change(pos, inv)
return 0
else
on_inventory_change(pos, inv)
return stack:get_count()
end
end,
allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
update_autocrafter(pos)
local inv = minetest.get_meta(pos):get_inventory()
local stack = inv:get_stack(from_list, from_index)
stack:set_count(count)
if from_list == "recipe" then
inv:set_stack(from_list, from_index, ItemStack(""))
on_recipe_change(pos, inv)
return 0
elseif to_list == "recipe" then
local stack_copy = ItemStack(stack)
stack_copy:set_count(1)
inv:set_stack(to_list, to_index, stack_copy)
on_recipe_change(pos, inv)
return 0
else
on_inventory_change(pos, inv)
return stack:get_count()
end
end,
on_timer = run_autocrafter
})
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