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Laravel Twitch EventSub Library

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Introduction

This package provides support for subscribing to Twitch EventSub. It's based on laravel-twitch and fully compatible.

Features

  • Create Twitch EventSub subscriptions via webhooks
  • Subscribe to the received events on a per-event basis through the dedicated classes
  • Define events, to subscribe to, whenever a specific model is saved to the database

Installation

First, install laravel-twitch.
Please refer to their documentation.

After laravel-twitch is installed and configured, install laravel-twitch-eventsub from composer

composer require katzen48/laravel-twitch-eventsub

The config can be published with

php artisan vendor:publish --tag=config

Configuration

After you published the config, you can find it in config/twitch-eventsub.php and it looks like this:

<?php

return [
    'callback_url' => env('TWITCH_HELIX_EVENTSUB_CALLBACK_URL', '/twitch/eventsub/webhook'), // Endpoint, the webhooks get sent to
];

Consume EventSub events

Even when you don't subscribe to eventsub using this library, a route is registered, which defaults to {APP_URL}/twitch/eventsub/webhook. When you subscribe to EventSub and use this URL as a callback, received events are parsed into dedicated events classes, which event listeners can subscribed to, individually.

To subscribe to an event, first create a listener with php artisan make:listener <Name> and add the event it should subscribe to as a parameter to the handle() function.

<?php

namespace App\Listeners;

use katzen48\Twitch\EventSub\Events\Channel\Subscription\ChannelSubscriptionGiftEvent;

class SubscriptionListener
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  object  $event
     * @return void
     */
    public function handle(ChannelSubscriptionGiftEvent $event)
    {
        // Do something
    }
}

To bind the listener to an event, add the listener to the $listen array in your EventServiceProvider

<?php

namespace App\Providers;

use App\Listeners\SubscriptionListener;use Illuminate\Auth\Events\Registered;use Illuminate\Auth\Listeners\SendEmailVerificationNotification;use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;use katzen48\Twitch\EventSub\Events\Channel\Subscription\ChannelSubscriptionGiftEvent;

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        Registered::class => [
            SendEmailVerificationNotification::class,
        ],
        ChannelSubscriptionGiftEvent::class => [ // The Event, to subscribe to
            SubscriptionListener::class, // The Listener
        ],
    ];

    /**
     * Register any events for your application.
     *
     * @return void
     */
    public function boot()
    {
        //
    }
}

There you go. Your listener now gets incoming events of type channel.subscribe from the Twitch EventSub.

Subscribe to Twitch EventSub on model save

Sometimes it is necessary, that newly created instances of a model trigger a subscription to the Twitch EventSub e.g. a User logged in for the first time. This behavior can be automated with the static SubscribesEventSubs trait.

Add the trait SubscribesEventSubs to your model. Next add a static variable called $eventSubs to your model with the events to subscribe to and the conditions, mapped to the attributes of your model.

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use katzen48\Twitch\EventSub\Traits\SubscribesEventSubs;
use romanzipp\Twitch\Enums\EventSubType;

class User extends Authenticatable
{
    use HasFactory, Notifiable, SubscribesEventSubs;

    public static array $eventSubs = [
        EventSubType::CHANNEL_UPDATE => [ // The Event Type (from laravel-twitch)
            'broadcaster_user_id' => 'id', // The conditions from the EventSub documentation and the model attributes
        ],
    ];

    protected $keyType = 'string';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'id',
        'name',
        'email',
        'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'id' => 'string',
        'email_verified_at' => 'datetime',
    ];
}

Now, whenever the created event is fired on that model, a subscription to the channel.update event tyoe is made. The id property of the model is automatically inserted for broadcaster_user_id.

About

[WIP] This is still in development and not ready for production.

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