Login with auth0 token

login_with_auth0_token.ex

defp login_with_auth0_token(conn, decoded_jwt) do
  case get_user_auth(decoded_jwt) do
    nil -> server_error(conn)
    user_auth ->
      cond do
        UserAuth.anon?(user_auth) ->
          authorized_anon(conn, user_auth)
        User.enabled?(user_auth.user) ->
          authorized_employee(conn, user_auth)
        true ->
          unauthorized(conn, %{})
      end
  end
end

defp get_user_auth(decoded_jwt) do
  phone_number = decoded_jwt["phone_number"]
  auth0_id = decoded_jwt["sub"]
  case Repo.get_by(UserAuth, method: "phone_number", remote_id: phone_number) do
    user_auth = %UserAuth{} -> Repo.preload(user_auth, :user)
    _ -> 
      # No user auth found, so create one
      # If a user has this phone number, assign them to the new user_auth
      user = Repo.get_by(User, phone_number: phone_number)
      changeset = %UserAuth{}
        |> UserAuth.changeset(%{method: "phone_number", remote_id: phone_number, auth0_id: auth0_id})
        |> Ecto.Changeset.put_assoc(:user, user)
      case Repo.insert(changeset) do
        {:ok, user_auth} -> user_auth |> Repo.preload(:user)
        {:error, _} -> nil
      end
  end
end