----- DO NOT USE ----- This project has been discontinued in favor of maintaining my own fork of Techpack with these changes included. This will not be updated. Please use techpack_0siribix instead

This will add refill capability to blocks which push stacks. If the receiving inventory has no empty slots but has less than a full stack, the pushing node will push a partial stack to refill the existing stack. This is especially useful for blocks that use fuel for example. This is fully backward compatible with receiving nodes but not with stack pushing nodes.

!!! WARNING !!! If you have custom stack pushing nodes then they will need to be updated or you will gain duplicate blocks when refilling inventory. The outdated pushing node will receive a false return from the receiving node and will not subtract the partial node that was sent

Example of receiving node

tubelib.register_node("mymod:item", {"mymod:alias"}, { ... on_push_stack = function(pos, side, item) local meta = minetest.get_meta(pos) return tubelib.put_item(meta, "main", item, tubelib.refill) end, ...

If you use "tubelib.register_node" and define on_push_item but you don't use tubelib.put_item (see my modifications to Drawers) then you simply return false and set the itemcount to the leftover amount. Previously you would do something like

	tubelib.register_node("drawers:controller", {}, {
		on_push_item = function(pos, side, item, player_name)
		-- Insert code here to check protection on this location
		if stack_accepted then
			return true
		else
			if
			return false
		end,

This would now change to something like this

	tubelib.register_node("drawers:controller", {}, {
		on_push_item = function(pos, side, item, player_name)
		-- Insert code here to check protection on this location
		if stack accepted then
			return true
		else
			leftover = my_insert_function(stack) -- leftover will be a stack to push back to the source
			if leftover:get_count() == 0 then
				return true
			else
				stack:set_count(leftover:get_count())
				return false
			end
		end,

The pushing node will check the count of the leftover to see if it has changed.