paulolaxamana/facebook_messenger_php

A PHP Facebook Messenger library to both receive and send messages

Facebook Messenger PHP Wrapper

This package is a wrapper around the majority of the functionality of the Facebook Messenger platform. A list of features not yet implemented is below.

This package is still in development; so please do submit pull requests / issues you are having.

Installation

Just use compser to bring it in.

composer require davidpiesse/facebook_messenger_php

Currently we are in dev mode so you may need to set minimum-stability:"dev" in your composer.json

Demo

A demo project (Laravel based) is here In the meantime you can interact with a demo ChatBot created using this wrapper.

Search for @laravelmessengerbot in Facebook messenger and you can test a load of the function. Or go here https://www.facebook.com/laravelmessengerbot/

Todo

Things still to implement

• User Profile
• All Airline Templates
• Sending of a file stream
• Payments

Current dependencies are GuzzleHttp/Guzzle, rappasoft/laravel-helpers and illuminate/http. These allow the package to make easy requests to the FB Messenger API and also deal with arrays in a super amazing way.

License

MIT

Who to call for help

Just add an issue or send me an email at piesse [at] gmail [dot] com or on Twitter @mapdev

#Sending Messages

Usage

To send messages to a user create an instance of the Messenger class and insert your token

$messenger = new Messenger($token);

and then to send a text message

$messenger->sendMessage(new TextMessage('Foo Bar'),'recipient_id');

Facebook API Link

Still writing this...

Incoming Webhook

For Facebook Messenger you provide a webhook URL for their API to contact your server when certain events occur. -Link-

Most of these revolve around incoming messages from a user; be it a text message, attachment, postback etc. these are all handled by the Callback object.

Pass in an array of data from the post request {in Laravel use $request->all()}

$callback = new Callback($request->all());

The data incoming should look similar to this

{
  "object":"page",
  "entry":[
    {
      "id":"PAGE_ID",
      "time":1458692752478,
      "messaging":[
        {
          "sender":{
            "id":"USER_ID"
          },
          "recipient":{
            "id":"PAGE_ID"
          },
          ...
        }
      ]
    }
  ]
}  

The $callback object parses all this information and allows you to easily retrieve it and determine what to do with it.

Structure

Below is a guide on how to find the data you want in the Callback object Within a normal Facbook Webhook POST request are two top level parameters: +object (always = 'page') +entry (almost always one & a collection of Entry objects)

To get at the data you must iterate $callback->entries to make sure you do not miss a batch of messages.

The Callback also has three methods textMessages(), postbackMessages(), and attachmentMessages(). These give you quick access to an array of EntryMessages of these specific types.

Within an 'entry' are a couple of properties and a array of EntryMessages

• id (Page ID)
• time (Timestamp)
• messaging (Array of entry messages)

Entry has the first two properties plus a message array (Laravel Collection). This is the array of EntryMessages.

This array of entry messages is where all the real information is. There are two main parts to it. THe shell (EntryMessage) contains the sender_id and recipient_id along with a timestamp.

It also provides you a set of boolean return methods to determine what type of message it is.

• isText()
• isPostback()
• isRead()
• isDelivered()
• isAuthentication()
• isAccountLinking()
• isEcho()

Each of these allow you to filter the type of message it is and access its $entry_message->message or other dynamic property appropriately.

Read

If the message is of type Read then $entry_message->read is set and is of type Read

Properties

• watermark
• seq

Delivered

If the message is of type Read then $entry_message->delivery is set and is of type Delivered

Properties

• watermark
• seq
• mids[]

Authentication

If the message is of type Read then $entry_message->authentication is set and is of type Authentication

Properties

• ref

Account Linking

If the message is of type Read then $entry_message->account_linking is set and is of type AccountLinking

Properties

• status
• authorization_token
• linked (bool)
• unlinked (bool)

Postback

If the message is of type Read then $entry_message->postback is set and is of type POstback

Properties

• payload

Message

If the message is of type Read then $entry_message->message is set and is of type Message

Properties

• mid
• seq
• isText (bool)
• isSticker (bool)
• hasAttachments (bool)
• text
• quick_reply
• attachments[]

Echo

The same as $entry_message->message except with some more properties attached.

Additional Properties

• app_id
• mid
• metadata (bool)
• seq (bool)

Examples

Here are some code snippets to get you started

//create a callback object
$callback = new Callback($request->all())

//get all textmessages from the callback (regardless of entry or EntryMessage)
$textmessages = $callback->textMessages(); //returns Entry Message collection

//check if EntryMessage $entrymessage is a postback and return the payload string
if($entrymessage->isPostback)
    return $entrymessage->postback->payload;

//get URL of an image attachment sent to you 0- assuming onely one attachment and entry etc.
if($entrymessage->isMessage){
    if($entrymessage->message->hasAttachments && ($entrymessage->message->attachments[0]->isImage){
        $image_url = $entrymessage->message->attachments[0]->url;
    }
}

As Laravel Collection is iuncluded it is a great way to delve into your callback easily

$callback = new Callback($request->all())
$callback->entries->each(function ($entry){
    //for each entry access their entry messages
    $entry->messages->each(function($entrymessage){
        //get sender_id to send a message back
        $sender_id = $entrymessage->sender_id;
        //for each entry message check is a postback or a message
        if($entrymessage->isPostback){
            //Do something with the postback
            $payload = $entrymessage->postback->payload;
        }else if($entrymessage->isMessage){
            //do somethingwith the message
            $message = $entrymessage->message;
        }
    });
});