Packages

messenger_bot

1.3.0
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Unofficial Facebook Messenger Platform chatbot client and webhook handler

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messenger_bot lib messenger_bot web plugs app_identification.ex
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lib/messenger_bot/web/plugs/app_identification.ex 

defmodule MessengerBot.Web.Plug.AppIdentification do

  @moduledoc false



  ############################################################################

  # Plug implementation to identify Facebook App                             #

  ############################################################################



  alias MessengerBot.Config

  alias MessengerBot.Model.App

  alias MessengerBot.Model.Error

  alias MessengerBot.Web.Renderer

  alias Plug.Conn



  @behaviour Plug



  @doc false

  def init(opts) do

    opts

  end



  @doc false

  def call(conn, _) do

    case app(conn.path_info) do

      %App{id: _} = app ->

        Conn.put_private(conn, :app, app)



      _ ->

        error = %Error{code: :not_found, details: %{app: "not found"}}

        Renderer.send_error(conn, error)

    end

  end



  defp app(path_info) do

    path_info

    |> List.last()

    |> Config.app()

  end

end