Convert a Zoom link into a zoomus:// link

url.ex

#!/usr/bin/env elixir

[url] = System.argv()
%URI{path: "/j/" <> confno} = url = URI.parse(url)

url
|> Map.update!(:query, fn query ->
  query
  |> URI.decode_query()
  |> Map.merge(%{action: "join", confno: confno})
  |> URI.encode_query()
end)
|> Map.merge(%{scheme: "zoomus", host: "zoom.us", port: nil, path: "/join", fragment: nil})
|> URI.to_string()
|> IO.puts()