key.lua

local S = minetest.get_translator("telemosaic")

minetest.register_tool("telemosaic:key", {
	description = S("Telemosaic Key"),
	inventory_image = "telemosaic_key.png",
	stack_max = 1,
	groups = {not_in_creative_inventory = 1},
	on_use = function(itemstack, player, pointed_thing)
		if pointed_thing.type == "node" then
			-- Use key to toggle telemosaic on/off
			local name = player:get_player_name()
			local pos = pointed_thing.under
			local state = telemosaic.get_state(pos)
			if state == "active" and not minetest.is_protected(pos, name) then
				telemosaic.set_state(pos, "disabled")
			elseif state == "disabled" and not minetest.is_protected(pos, name) then
				telemosaic.set_state(pos, "active")
			end
		end
		return itemstack
	end,
	on_place = function(itemstack, player, pointed_thing)
		-- Call on_rightclick, even if sneak is pressed
		if pointed_thing.type == "node" and player then
			local node = minetest.get_node(pointed_thing.under)
			local def = minetest.registered_nodes[node.name]
			if def and def.on_rightclick then
				return def.on_rightclick(pointed_thing.under, node, player, itemstack, pointed_thing) or itemstack
			end
		end
	end,
})

minetest.register_craft({
	type = "shapeless",
	recipe = {"telemosaic:key"},
	output = "default:mese_crystal_fragment"
})