# ExFacebookMessenger
[![Build Status](https://travis-ci.org/oarrabi/EXFacebook-Messenger.svg?branch=master)](https://travis-ci.org/oarrabi/EXFacebook-Messenger)
[![Hex.pm](https://img.shields.io/hexpm/v/facebook_messenger.svg)](https://hex.pm/packages/facebook_messenger)
[![API Docs](https://img.shields.io/badge/api-docs-yellow.svg?style=flat)](http://hexdocs.pm/EXFacebook-Messenger/)
[![Coverage Status](https://coveralls.io/repos/github/oarrabi/EXFacebook-Messenger/badge.svg?branch=master)](https://coveralls.io/github/oarrabi/EXFacebook-Messenger?branch=master)
[![Inline docs](http://inch-ci.org/github/oarrabi/EXFacebook-Messenger.svg?branch=master)](http://inch-ci.org/github/oarrabi/EXFacebook-Messenger)
ExFacebookMessenger is a library that helps you create facebook messenger bots easily.
## Installation
```
def deps do
[{:facebook_messenger, "~> 0.2.0"}]
end
```
## Usage
### With plug
To create an echo back bot, do the following:
In your `Plug.Router` define a `forward` with a route to `FacebookMessenger.Router`
```
defmodule Sample.Router do
use Plug.Router
...
forward "/messenger/webhook",
to: FacebookMessenger.Router,
message_received: &Sample.Router.message/1
def message(msg) do
text = FacebookMessenger.Response.message_texts(msg) |> hd
sender = FacebookMessenger.Response.message_senders(msg) |> hd
FacebookMessenger.Sender.send(sender, text)
end
enda
```
This defines a webhook endpoint at:
`http://your-app-url/messenger/webhook`
Go to your `config/config.exs` and add the required configurations
```
config :facebook_messenger,
facebook_page_token: "Your facebook page token",
challenge_verification_token: "the challenge verify token"
```
To get the `facebook_page_token` and `challenge_verification_token` follow the instructions [here ](https://developers.facebook.com/docs/messenger-platform/quickstart)
For the webhook endpoint use `http://your-app-url/messenger/webhook`
### With Pheonix
If you use phoenix framework in your project, then you need the phoenix version of `facebook_messenger` this can be found at `phoenix_facebook_messenger` [found here](https://github.com/oarrabi/phoenix_facebook_messenger).
## Sample
A sample facebook chat echo bot can be found [here](https://github.com/oarrabi/elixir-echo-bot).
## Future Improvements
- [ ] Handle other types of facebook messages
- [ ] Support sending facebook structure messages
- [ ] Handle facebook postback messages