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utility.lua
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utility.lua
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local FS = hopper.translator_escaped
-- Target inventory retrieval
-- looks first for a registration matching the specific node name, then for a registration
-- matching group and value, then for a registration matching a group and *any* value
hopper.get_registered = function(target_node_name)
local output = hopper.containers[target_node_name]
if output ~= nil then return output end
local target_def = minetest.registered_nodes[target_node_name]
if target_def == nil or target_def.groups == nil then return nil end
for group, value in pairs(target_def.groups) do
local registered_group = hopper.groups[group]
if registered_group ~= nil then
output = registered_group[value]
if output ~= nil then return output end
output = registered_group["all"]
if output ~= nil then return output end
end
end
return nil
end
hopper.get_eject_button_texts = function(pos, loc_X, loc_Y)
if not hopper.config.eject_button_enabled then return "" end
local texture, eject_button_tooltip
if minetest.get_meta(pos):get_string("eject") == "true" then
texture = "hopper_mode_eject.png"
eject_button_tooltip = FS("This hopper is currently set to eject items from its output\neven if there isn't a compatible block positioned to receive it.\nClick this button to disable this feature.")
else
texture = "hopper_mode_hold.png"
eject_button_tooltip = FS("This hopper is currently set to hold on to item if there\nisn't a compatible block positioned to receive it.\nClick this button to have it eject items instead.")
end
return ("image_button_exit[%g,%g;1,1;%s;eject;]"):format(loc_X, loc_Y, texture) ..
"tooltip[eject;"..eject_button_tooltip.."]"
end
hopper.get_string_pos = function(pos)
return pos.x .. "," .. pos.y .. "," ..pos.z
end
-- Apparently node_sound_metal_defaults is a newer thing, I ran into games using an older version of the default mod without it.
if default.node_sound_metal_defaults ~= nil then
hopper.metal_sounds = default.node_sound_metal_defaults()
else
hopper.metal_sounds = default.node_sound_stone_defaults()
end
-------------------------------------------------------------------------------------------
-- Inventory transfer functions
local delay = function(x)
return (function() return x end)
end
local get_placer = function(player_name)
if player_name ~= "" then
return minetest.get_player_by_name(player_name) or {
is_player = delay(true),
get_player_name = delay(player_name),
is_fake_player = ":hopper",
get_wielded_item = delay(ItemStack(nil))
}
end
return nil
end
local function get_container_inventory(node_pos, inv_info)
local get_inventory_fn = inv_info.get_inventory
local inventory
if get_inventory_fn then
inventory = get_inventory_fn(node_pos)
if not inventory then
local target_node = minetest.get_node(node_pos)
minetest.log("error","No inventory from api get_inventory function: " ..
target_node.name .. " on " .. vector.to_string(node_pos))
end
else
inventory = minetest.get_meta(node_pos):get_inventory()
end
return inventory
end
-- Used to remove items from the target block and put it into the hopper's inventory
hopper.take_item_from = function(hopper_pos, target_pos, target_node, target_inv_info)
local target_def = minetest.registered_nodes[target_node.name]
if not target_def then
return
end
--hopper inventory
local hopper_meta = minetest.get_meta(hopper_pos)
local hopper_inv = hopper_meta:get_inventory()
local placer = get_placer(hopper_meta:get_string("placer"))
--source inventory
local target_inv_name = target_inv_info.inventory_name
local target_inv = get_container_inventory(target_pos, target_inv_info)
if not target_inv then
return false
end
local target_inv_size = target_inv:get_size(target_inv_name)
if target_inv:is_empty(target_inv_name) == false then
for i = 1,target_inv_size do
local stack = target_inv:get_stack(target_inv_name, i)
local item = stack:get_name()
if item ~= "" then
if hopper_inv:room_for_item("main", item) then
local stack_to_take = stack:take_item(1)
if target_def.allow_metadata_inventory_take == nil
or placer == nil -- backwards compatibility, older versions of this mod didn't record who placed the hopper
or target_def.allow_metadata_inventory_take(target_pos, target_inv_name, i, stack_to_take, placer) > 0 then
target_inv:set_stack(target_inv_name, i, stack)
--add to hopper
hopper_inv:add_item("main", stack_to_take)
if target_def.on_metadata_inventory_take ~= nil and placer ~= nil then
target_def.on_metadata_inventory_take(target_pos, target_inv_name, i, stack_to_take, placer)
end
break
end
end
end
end
end
end
local function send_item_to_air(hopper_inv, target_pos, filtered_items)
local stack
local stack_num
for i = 1, hopper_inv:get_size("main") do
stack = hopper_inv:get_stack("main", i)
local item = stack:get_name()
if item ~= "" and (filtered_items == nil or filtered_items[item]) then
stack_num = i
break
end
end
if not stack_num then
return false
end
local stack_to_put = stack:take_item(1)
minetest.add_item(target_pos, stack_to_put)
hopper_inv:set_stack("main", stack_num, stack)
return true
end
local function send_item_to_inv(hopper_inv, target_pos, filtered_items, placer, target_inv_info, target_def)
local target_inv_name = target_inv_info.inventory_name
local target_inv = get_container_inventory(target_pos, target_inv_info)
if not target_inv then
return false
end
local stack
local stack_num
for i = 1, hopper_inv:get_size("main") do
stack = hopper_inv:get_stack("main", i)
local item = stack:get_name()
if item ~= "" and (filtered_items == nil or filtered_items[item])
and target_inv:room_for_item(target_inv_name, item) then
stack_num = i
break
end
end
if not stack_num then
return false
end
local stack_to_put = stack:take_item(1)
if target_def.allow_metadata_inventory_put and placer -- backwards compatibility, older versions of this mod didn't record who placed the hopper
and target_def.allow_metadata_inventory_put(target_pos, target_inv_name, stack_num, stack_to_put, placer) < 0 then
return false
end
hopper_inv:set_stack("main", stack_num, stack)
target_inv:add_item(target_inv_name, stack_to_put)
if target_def.on_metadata_inventory_put ~= nil and placer ~= nil then
target_def.on_metadata_inventory_put(target_pos, target_inv_name, stack_num, stack_to_put, placer)
end
return true
end
-- Used to put items from the hopper inventory into the target block
hopper.send_item_to = function(hopper_pos, target_pos, target_node, target_inv_info, filtered_items)
local target_def = minetest.registered_nodes[target_node.name]
if not target_def then
return false
end
local hopper_meta = minetest.get_meta(hopper_pos)
local hopper_inv = hopper_meta:get_inventory()
if hopper_inv:is_empty("main") == true then
return false
end
if target_inv_info then
local placer = get_placer(hopper_meta:get_string("placer"))
return send_item_to_inv(hopper_inv, target_pos, filtered_items, placer, target_inv_info, target_def)
end
if hopper.config.eject_button_enabled and target_def.buildable_to
and hopper_meta:get_string("eject") == "true" then
return send_item_to_air(hopper_inv, target_pos, filtered_items)
end
return false
end