defmodule Griffin.Web.Plug do
  @moduledoc """
  Griffin Cowboy Plug to serve files from the output directory
  """
  import Plug.Conn

  @output_path Application.compile_env(:griffin, :output_path, "_site")

  def init(options) do
    options
  end

  @doc """
  Simple route that serves files from the configured Griffin output directory.
  """
  @spec call(Plug.Conn.t(), any) :: Plug.Conn.t()
  def call(conn, _opts) do
    filename = "#{@output_path}/#{conn.request_path}"
    if File.exists?(filename) do
      send_file(conn, 200, filename)
    else
      send_resp(conn, 404, "File not found")
    end
  end
end