Redirect from LiveView Mount?

Phoenix Forum Questions / Help
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1

I’m building a multiplayer game using Phoenix LiveView. A user joins a game by giving its name as the id on the url: e.g. “/game-room-name”. User joins an existing game with that name of one is created. So far so good.

But I want to sanitize the game name, so when user goes to “/My%20New%20Game”, they are redirected instead to “/my-new-game”.

Correct me if I’m wrong, but I can’t do that in the liveview mount. Can I do it in a Plug instead? Or is that a better way?

Thanks!

2

Actually, nevermind, I see I can do this with a plug and redirect. Here’s how I wrote my plug:

defmodule ChukinasWeb.Plugs.SanitizeRoomName do
  # TODO how to add documentation?
  alias Phoenix.Controller
  alias Plug.Conn

  def init(opts) do
    opts
  end

  def call(%{:path_params => %{"room_name" => room_name}} = conn, _opts) do
    room_slug = slugify(room_name)
    if room_slug != room_name do
      path =
        conn.request_path
        |> URI.decode()
        |> String.replace(room_name, room_slug)
      conn
      |> Controller.redirect(to: path)
      |> Conn.halt()
    else
      conn
    end
  end

  def call(conn, _opts) do
    conn
  end

  def slugify(string) do
    string
    |> String.downcase()
    |> String.replace(~r/[^\w-]+/u, "-")
  end
end
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