minetest-mods/xdecor/src/rope.lua

local rope = {}
local S = minetest.get_translator("xdecor")

-- Code by Mirko K. (modified by Temperest, Wulfsdad and kilbith) (License: GPL).
function rope.place(itemstack, placer, pointed_thing)
	if pointed_thing.type == "node" then
		local pos = pointed_thing.above
		local oldnode = minetest.get_node(pos)
		local stackname = itemstack:get_name()

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

		while oldnode.name == "air" and not itemstack:is_empty() do
			local newnode = {name = stackname, param1 = 0}
			minetest.set_node(pos, newnode)
			itemstack:take_item()
			pos.y = pos.y - 1
			oldnode = minetest.get_node(pos)
		end
	end

	return itemstack
end

function rope.remove(pos, oldnode, digger, rope_name)
	local num = 0
	local below = {x = pos.x, y = pos.y, z = pos.z}
	local digger_inv = digger:get_inventory()

	while minetest.get_node(below).name == rope_name do
		minetest.remove_node(below)
		below.y = below.y - 1
		num = num + 1
	end

	if num == 0 then return end
	digger_inv:add_item("main", rope_name.." "..num)

	return true
end

xdecor.register("rope", {
	description = S("Rope"),
	drawtype = "plantlike",
	walkable = false,
	climbable = true,
	groups = {snappy = 3, flammable = 3},
	tiles = {"xdecor_rope.png"},
	inventory_image = "xdecor_rope_inv.png",
	wield_image = "xdecor_rope_inv.png",
	selection_box = xdecor.pixelbox(8, {{3, 0, 3, 2, 8, 2}}),
	on_place = rope.place,

	on_punch = function(pos, node, puncher, pointed_thing)
		local player_name = puncher:get_player_name()

		if not minetest.is_protected(pos, player_name) or
			minetest.get_player_privs(player_name).protection_bypass then
			rope.remove(pos, node, puncher, "xdecor:rope")
		end
	end
})

-- Recipes

minetest.register_craft({
	output = "xdecor:rope",
	recipe = {
		{"farming:string"},
		{"farming:string"},
		{"farming:string"}
	}
})