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messenger_bot

0.9.2
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Unofficial Facebook Messenger Platform chatbot client and webhook handler

Retired package: Deprecated
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messenger_bot lib messenger_bot webhooks setup.ex
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lib/messenger_bot/webhooks/setup.ex 

defmodule MessengerBot.Webhook.Setup do

  @moduledoc """

  MessengerBot webhook handlers

  """



  alias MessengerBot.Config



  @type messenger_webhook_setup_params :: %{String.t => String.t,

    String.t => String.t, String.t => String.t}



  @spec process(messenger_webhook_setup_params | any()) ::

    {:ok, String.t} | {:error, map()}

  def process(%{"hub.challenge" => challenge, "hub.mode" => "subscribe",

   "hub.verify_token" => token} = _params) do

    with :ok <- verify_token(token) do

      {:ok, challenge}

    else

      {:error, reason} -> {:error, reason}

    end

  end

  def process(%{"hub.challenge" => challenge, "hub.mode" => "unsubscribe",

   "hub.verify_token" => token} = _params) do

    with :ok <- verify_token(token) do

      {:ok, challenge}

    else

      {:error, reason} -> {:error, reason}

    end

  end

  def process(_) do

    {:error, %{"query" => "Missing param(s)!"}}

  end



  defp verify_token(token) do

    if Config.setup_token == token do

      :ok

    else

      {:error,

        %{"hub.verify_token" => "Token(#{token}) is not valid!"}}

    end

  end

end