defmodule PhoenixAlexa.ValidateApplicationId do
  import Plug.Conn

  def init(applicationId), do: applicationId

  def call(conn, applicationId) do
    case conn.body_params["session"]["application"]["applicationId"] do
      ^applicationId  -> 
        conn
      _ ->
        conn
          |> Plug.Conn.send_resp(400, ~s({"error": "Invalid application"}))
          |> halt        
    end
  end  
end