pixelfed/app/Jobs/StoryPipeline/StoryFanout.php

<?php

namespace App\Jobs\StoryPipeline;

use Cache, Log;
use App\Story;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;
use App\Transformer\ActivityPub\Verb\CreateStory;
use App\Util\ActivityPub\Helpers;
use GuzzleHttp\Pool;
use GuzzleHttp\Client;
use GuzzleHttp\Promise;
use App\Util\ActivityPub\HttpSignature;
use App\Services\FollowerService;
use App\Services\StoryService;

class StoryFanout implements ShouldQueue
{
	use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

	protected $story;

	/**
	 * Delete the job if its models no longer exist.
	 *
	 * @var bool
	 */
	public $deleteWhenMissingModels = true;

	/**
	 * Create a new job instance.
	 *
	 * @return void
	 */
	public function __construct(Story $story)
	{
		$this->story = $story;
	}

	/**
	 * Execute the job.
	 *
	 * @return void
	 */
	public function handle()
	{
		$story = $this->story;
		$profile = $story->profile;

		if($story->local == false || $story->remote_url) {
			return;
		}

		StoryService::delLatest($story->profile_id);

		$audience = FollowerService::softwareAudience($story->profile_id, 'pixelfed');

		if(empty($audience)) {
			// Return on profiles with no remote followers
			return;
		}

		$fractal = new Fractal\Manager();
		$fractal->setSerializer(new ArraySerializer());
		$resource = new Fractal\Resource\Item($story, new CreateStory());
		$activity = $fractal->createData($resource)->toArray();

		$payload = json_encode($activity);

		$client = new Client([
			'timeout'  => config('federation.activitypub.delivery.timeout')
		]);

		$requests = function($audience) use ($client, $activity, $profile, $payload) {
			foreach($audience as $url) {
				$headers = HttpSignature::sign($profile, $url, $activity);
				yield function() use ($client, $url, $headers, $payload) {
					return $client->postAsync($url, [
						'curl' => [
							CURLOPT_HTTPHEADER => $headers,
							CURLOPT_POSTFIELDS => $payload,
							CURLOPT_HEADER => true
						]
					]);
				};
			}
		};

		$pool = new Pool($client, $requests($audience), [
			'concurrency' => config('federation.activitypub.delivery.concurrency'),
			'fulfilled' => function ($response, $index) {
			},
			'rejected' => function ($reason, $index) {
			}
		]);

		$promise = $pool->promise();

		$promise->wait();
	}
}