85 lines
3.2 KiB
Lua
85 lines
3.2 KiB
Lua
-- Returns nil if there's no leftovers
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-- Otherwise returns a countlist of leftovers
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local add_count_list = function(inv, listname, count_list)
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local leftover_list
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for item, count in pairs(count_list) do
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local stack_max = ItemStack(item):get_stack_max()
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while count > 0 do
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local to_add = math.min(count, stack_max)
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local leftover = inv:add_item(listname, ItemStack({name=item, count=to_add}))
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local leftover_count = leftover:get_count()
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if leftover_count > 0 then
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leftover_list = leftover_list or {}
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leftover_list[item] = (leftover_list[item] or 0) + leftover_count + count
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break
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end
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count = count - to_add
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end
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end
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return leftover_list
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end
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-- Attempts to add the items in count_list to the inventory.
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-- Returns a count list containing the items that couldn't be added.
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simplecrafting_lib.add_items = function(inv, listname, count_list)
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return add_count_list(inv, listname, count_list) or {}
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end
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-- Attempts to add the items in count_list to the inventory.
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-- If it succeeds, returns true.
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-- If it fails, the inventory is not modified and returns false.
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simplecrafting_lib.add_items_if_room = function(inv, listname, count_list)
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local old_list = inv:get_list(listname) -- record current inventory
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if not add_count_list(inv, listname, count_list) then
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inv:set_list(listname, old_list) -- reset inventory
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return false
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end
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return true
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end
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-- Returns true if there's room in the inventory for all of the items in the count list,
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-- false otherwise.
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--This should return true when there is space for more items, broken right now.
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simplecrafting_lib.room_for_items = function(inv, listname, count_list)
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local old_list = inv:get_list(listname) -- record current inventory
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local result = add_count_list(inv, listname, count_list)
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inv:set_list(listname, old_list) -- reset inventory
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return result ~= nil
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end
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-- removes the items in the count_list (formatted as per recipe standards)
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-- from the inventory. Returns true on success, false on failure. Does not
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-- affect the inventory on failure (removal is atomic)
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simplecrafting_lib.remove_items = function(inv, listname, count_list)
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local old_list = inv:get_list(listname) -- record current inventory
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for item, count in pairs(count_list) do
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while count > 0 do
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-- We need to do this loop because we may be wanting to remove more items than
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-- a single stack of that item can hold.
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-- https://github.com/minetest/minetest/issues/8883
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local stack_to_remove = ItemStack({name=item, count=count})
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stack_to_remove:set_count(math.min(count, stack_to_remove:get_stack_max()))
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local removed = inv:remove_item(listname, stack_to_remove)
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if removed:is_empty() then
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-- ran out of things to take. Reset the inventory and return false
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inv:set_list(listname, old_list)
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return false
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end
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count = count - removed:get_count()
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end
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end
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return true
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end
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-- Drops the contents of a count_list at the given location in the world
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simplecrafting_lib.drop_items = function(pos, count_list)
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for item, count in pairs(count_list) do
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local stack_max = ItemStack(item):get_stack_max()
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while count > 0 do
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local to_add = math.min(count, stack_max)
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minetest.add_item(pos, ItemStack({name=item, count=to_add}))
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count = count - to_add
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end
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end
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end
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