ExFacebookMessenger

ExFacebookMessenger is a library that easy the creation of facebook messenger bots.

Installation

If available in Hex, the package can be installed as:

1. Add facebook_messenger to your list of dependencies in mix.exs:

   def deps do [{:facebook_messenger, "~> 0.0.1"}] end

2. Ensure facebook_messenger is started before your application:

   def application do [applications: [:facebook_messenger]] end

Requirements

• a Phoenix App with phoenix 1.1 and up

Usage

You need to have a working phoenix app to use ExFacebookMessenger.

To create an echo back bot, do the following:

Create a new controller web/controller/test_controller.ex

defmodule TestController do
  use FacebookMessenger.Controller

  def message_received(msg) do
    text = FacebookMessenger.Response.message_texts(msg) |> hd
    sender = FacebookMessenger.Response.message_senders(msg) |> hd
    FacebookMessenger.Sender.send(sender, text)
  end
end

Add the required routes in web/router.ex

defmodule YourApp.Router do
  use YourApp.Web, :router

  # Add these two lines
  use FacebookMessenger.Router
  facebook_routes "webhook", TestController
end

This defines a webhook endpoint at: http://your-app-url/webhook

Go to your config/config.exs and add the required configurations

config :facebook_messenger,
      facebook_page_token: "Your facebook page token",
      challange_verification_token: "the challange verify token"

To get the facebook_page_token and challange_verification_token follow the instructions here

For the webhook endpoint use http://your-app-url/webhook