Disclaimer: I’m new (still learning) elixir.
Can’t figure how to DRY this code out, I would like to capture the “message” from all blocks and then send the response and halt the connection.

Original code:

def call(conn, _) do
    case some_function(conn) do
      {:ok, response} ->
        put_private(conn, :my_app, %{my_key: response})

      {:error, :error_1 ->
        conn
        |> put_resp_content_type("application/json")
        |> send_resp(403, "Message for error 1")
        |> halt

      {:error, :error_2} ->
        conn
        |> put_resp_content_type("application/json")
        |> send_resp(403, "Message for error 2")
        |> halt

      _ ->
        conn
        |> put_resp_content_type("application/json")
        |> send_resp(403, "Generic message")
        |> halt
    end
  end

I wanted to put everything in a with statement like:

with {:ok, response} <-  some_function(conn) do
     put_private(conn, :my_app, %{my_key: response})
else
     {:error, :error_1} ->
        message = "Message for error 1"
     {:error, :error_2} ->
        message = "Message for error 2"
      _ ->
        message = "Generic message"
    end

I’m pretty sure there is a better way to capture the “message” and also not sure where to put the “response” as inside the “else” clause will need to put it for all clauses, outside will also be triggered if there is no error.

conn
|> put_resp_content_type("application/json")
|> send_resp(403, message)
|> halt

Any hint or constructive criticism in case you think I’m going in the wrong direction will be appreciated.
Thanks.