write something there

mods/telemosaic/key.lua

@@ -0,0 +1,38 @@
+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"
+})