local function get_inventory (pos)
	local meta = minetest.get_meta(pos)
	return minetest.deserialize(meta:get_string("inventory"))
end

local function set_inventory (pos, inventory)
	local meta = minetest.get_meta(pos)
	meta:set_string("inventory", minetest.serialize(inventory))
end



local function push (pos, value)
	local inventory = get_inventory(pos)
	if not inventory then return false end

	table.insert(inventory, value)
	set_inventory(pos, inventory)
	return true
end

local function pop (pos)
	local inventory = get_inventory(pos)
	if not inventory then return nil end

	local value = table.remove(inventory, 1)
	set_inventory(pos, inventory)
	return value
end



local function place_funnel (itemstack, placed, pointed)
	local result = minetest.item_place(itemstack, placer, pointed)

	local pos = pointed.above
	local meta = minetest.get_meta(pos)
	set_inventory(pos, {})

	return result
end

local function dig_funnel (pos, ...)
	local result = minetest.node_dig(pos, ...)
	return result
end



return {
	get_inventory = get_inventory,
	set_inventory = set_inventory,
	place_funnel = place_funnel,
	dig_funnel = dig_funnel,
	push = push,
	pop = pop,
}