63 lines
1.8 KiB
Elixir
63 lines
1.8 KiB
Elixir
defmodule ToweropsWeb.Plugs.MobileAuth do
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@moduledoc """
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Plug for authenticating mobile app requests using bearer tokens.
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Expects an Authorization header with format: "Bearer <token>"
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On success, assigns :current_user and :current_mobile_session to the conn.
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On failure, returns 401 Unauthorized.
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"""
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import Phoenix.Controller, only: [json: 2]
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import Plug.Conn
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alias Towerops.Accounts
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alias Towerops.MobileSessions
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def init(opts), do: opts
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def call(conn, _opts) do
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with {:ok, token} <- extract_token(conn),
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{:ok, session} <- validate_session(token),
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{:ok, user} <- get_user(session.user_id) do
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# Touch the session to update last_used_at
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Task.start(fn -> MobileSessions.touch_session(session) end)
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conn
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|> assign(:current_user, user)
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|> assign(:current_mobile_session, session)
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else
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{:error, reason} ->
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conn
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|> put_status(:unauthorized)
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|> json(%{error: error_message(reason)})
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|> halt()
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end
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end
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defp extract_token(conn) do
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case get_req_header(conn, "authorization") do
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["Bearer " <> token] -> {:ok, token}
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_ -> {:error, :missing_token}
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end
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end
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defp validate_session(token) do
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case MobileSessions.get_session_by_token(token) do
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nil -> {:error, :invalid_token}
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session -> {:ok, session}
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end
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end
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defp get_user(user_id) do
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case Accounts.get_user(user_id) do
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nil -> {:error, :user_not_found}
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user -> {:ok, user}
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end
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end
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defp error_message(:missing_token), do: "Authorization header is missing or invalid"
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defp error_message(:invalid_token), do: "Invalid or expired authentication token"
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defp error_message(:user_not_found), do: "User not found"
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defp error_message(_), do: "Authentication failed"
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end
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