warning when jumpdrive is placed in atmosphere

send player chat warning when jumpdrive is placed in atmosphere and player does not have landing priv

travel/jumpdrive.lua

@@ -1,3 +1,14 @@
+local default_after_place = minetest.registered_nodes["jumpdrive:engine"].after_place_node
+local function custom_after_place(pos, placer)
+	default_after_place(pos, placer)
+	local playername = placer:get_player_name()
+	local has_landing_priv = minetest.check_player_privs(playername, { jumpdrive_land = true })
+	if not has_landing_priv and -20 < pos.y and 100 > pos.y then
+		minetest.chat_send_player(playername, "You won't be able to jump away from here until you have jumpdrive_land priv!")
+	end
+end
+minetest.override_item("jumpdrive:engine", { after_place_node = custom_after_place })
+
 jumpdrive.preflight_check = function(source, destination, radius, playername)
 	local has_landing_priv = minetest.check_player_privs(playername, {jumpdrive_land=true})