Epic/mods/hopper/nodes/chute.lua

-- internationalization boilerplate
local MP = minetest.get_modpath(minetest.get_current_modname())
local S, NS = dofile(MP.."/intllib.lua")

local function get_chute_formspec(pos)
   local spos = hopper.get_string_pos(pos)
   local formspec =
      "size[8,7]"
      .. hopper.formspec_bg
      .. "list[nodemeta:" .. spos .. ";main;3,0.3;2,2;]"
      .. hopper.get_eject_button_texts(pos, 7, 0.8)
      .. "list[current_player;main;0,2.85;8,1;]"
      .. "list[current_player;main;0,4.08;8,3;8]"
      .. "listring[nodemeta:" .. spos .. ";main]"
      .. "listring[current_player;main]"
   return formspec
end

minetest.register_node("hopper:chute", {
   description = S("Hopper Chute"),
   _doc_items_longdesc = hopper.doc.chute_long_desc,
   _doc_items_usagehelp = hopper.doc.chute_usage,
   drop = "hopper:chute",
   groups = {cracky = 3},
   sounds = hopper.metal_sounds,
   drawtype = "nodebox",
   paramtype = "light",
   paramtype2 = "facedir",
   tiles = {
      "hopper_bottom_" .. hopper.config.texture_resolution .. ".png^hopper_chute_arrow_" .. hopper.config.texture_resolution .. ".png",
      "hopper_bottom_" .. hopper.config.texture_resolution .. ".png^(hopper_chute_arrow_" .. hopper.config.texture_resolution .. ".png^[transformR180)",
      "hopper_bottom_" .. hopper.config.texture_resolution .. ".png^(hopper_chute_arrow_" .. hopper.config.texture_resolution .. ".png^[transformR270)",
      "hopper_bottom_" .. hopper.config.texture_resolution .. ".png^(hopper_chute_arrow_" .. hopper.config.texture_resolution .. ".png^[transformR90)",
      "hopper_top_" .. hopper.config.texture_resolution .. ".png",
      "hopper_bottom_" .. hopper.config.texture_resolution .. ".png"
   },
   use_texture_alpha = "clip",
   node_box = {
      type = "fixed",
      fixed = {
         {-0.3, -0.3, -0.3, 0.3, 0.3, 0.3},
         {-0.2, -0.2, 0.3, 0.2, 0.2, 0.7},
      },
   },

   on_construct = function(pos)
      local inv = minetest.get_meta(pos):get_inventory()
      inv:set_size("main", 2*2)
   end,

   on_place = function(itemstack, placer, pointed_thing, node_name)
      local pos  = pointed_thing.under
      local pos2 = pointed_thing.above
      local x = pos.x - pos2.x
      local z = pos.z - pos2.z

      if not placer then
         return itemstack
      end

      local pos = pointed_thing.above

      if minetest.is_protected(pos, placer:get_player_name()) then
         return itemstack
      end

      local returned_stack, success = minetest.item_place_node(itemstack, placer, pointed_thing)
      if success then
         local meta = minetest.get_meta(pos2)
         meta:set_string("placer", placer:get_player_name())
      end
      return returned_stack
   end,

   can_dig = function(pos,player)
      local inv = minetest.get_meta(pos):get_inventory()
      return inv:is_empty("main")
   end,

   on_rightclick = function(pos, node, clicker, itemstack)
      if minetest.is_protected(pos, clicker:get_player_name()) and not minetest.check_player_privs(clicker, "protection_bypass") then
         return
      end
      minetest.show_formspec(clicker:get_player_name(),
         "hopper_formspec:"..minetest.pos_to_string(pos), get_chute_formspec(pos))
   end,

   allow_metadata_inventory_put = function(pos, listname, index, stack, player)
      return stack:get_count()
   end,

   on_metadata_inventory_put = function(pos, listname, index, stack, player)
      minetest.log("action", S("@1 moves stuff to chute at @2",
         player:get_player_name(), minetest.pos_to_string(pos)))

      local timer = minetest.get_node_timer(pos)
      if not timer:is_started() then
         timer:start(1)
      end
   end,

   on_timer = function(pos, elapsed)
      local meta = minetest.get_meta(pos);
      local inv = meta:get_inventory()

      local node = minetest.get_node(pos)
      local dir = minetest.facedir_to_dir(node.param2)
      local destination_pos = vector.add(pos, dir)
      local output_direction
      if dir.y == 0 then
         output_direction = "horizontal"
      end

      local destination_node = minetest.get_node(destination_pos)
      local registered_inventories = hopper.get_registered_inventories_for(destination_node.name)
      if registered_inventories ~= nil then
         if output_direction == "horizontal" then
            hopper.send_item_to(pos, destination_pos, destination_node, registered_inventories["side"])
         else
            hopper.send_item_to(pos, destination_pos, destination_node, registered_inventories["bottom"])
         end
      else
         hopper.send_item_to(pos, destination_pos, destination_node)
      end

      if not inv:is_empty("main") then
         minetest.get_node_timer(pos):start(1)
      end
   end,
})