pixelfed/app/Jobs/MovePipeline/UnfollowLegacyAccountMovePipeline.php

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<?php
namespace App\Jobs\MovePipeline;
use App\Util\ActivityPub\Helpers;
use App\Util\ActivityPub\HttpSignature;
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use DateTime;
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use DB;
use Exception;
use GuzzleHttp\Client;
use GuzzleHttp\Pool;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Queue\Queueable;
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use Illuminate\Queue\Middleware\ThrottlesExceptions;
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use Illuminate\Queue\Middleware\WithoutOverlapping;
class UnfollowLegacyAccountMovePipeline implements ShouldQueue
{
use Queueable;
public $target;
public $activity;
/**
* The number of times the job may be attempted.
*
* @var int
*/
public $tries = 6;
/**
* The maximum number of unhandled exceptions to allow before failing.
*
* @var int
*/
public $maxExceptions = 3;
/**
* Create a new job instance.
*/
public function __construct($target, $activity)
{
$this->target = $target;
$this->activity = $activity;
}
/**
* Get the middleware the job should pass through.
*
* @return array<int, object>
*/
public function middleware(): array
{
return [
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new WithoutOverlapping('process-move-undo-legacy-followers:'.$this->target),
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(new ThrottlesExceptions(2, 5 * 60))->backoff(5),
];
}
/**
* Determine the time at which the job should timeout.
*/
public function retryUntil(): DateTime
{
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return now()->addMinutes(5);
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}
/**
* Execute the job.
*/
public function handle(): void
{
if (config('app.env') !== 'production' || (bool) config_cache('federation.activitypub.enabled') == false) {
throw new Exception('Activitypub not enabled');
}
$target = $this->target;
$actor = $this->activity;
$targetAccount = Helpers::profileFetch($target);
$actorAccount = Helpers::profileFetch($actor);
if (! $targetAccount || ! $actorAccount) {
throw new Exception('Invalid move accounts');
}
$version = config('pixelfed.version');
$appUrl = config('app.url');
$userAgent = "(Pixelfed/{$version}; +{$appUrl})";
$addlHeaders = [
'Content-Type' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'User-Agent' => $userAgent,
];
$targetInbox = $actorAccount['sharedInbox'] ?? $actorAccount['inbox_url'];
$targetPid = $actorAccount['id'];
DB::table('followers')
->join('profiles', 'followers.profile_id', '=', 'profiles.id')
->where('followers.following_id', $actorAccount['id'])
->whereNotNull('profiles.user_id')
->whereNull('profiles.deleted_at')
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->select('profiles.id', 'profiles.user_id', 'profiles.username', 'profiles.private_key', 'profiles.status')
->chunkById(100, function ($followers) use ($actor, $addlHeaders, $targetInbox, $targetPid) {
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$client = new Client([
'timeout' => config('federation.activitypub.delivery.timeout'),
]);
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$requests = function ($followers) use ($client, $actor, $addlHeaders, $targetInbox, $targetPid) {
$activity = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'type' => 'Undo',
'id' => null,
'actor' => null,
'object' => [
'type' => 'Follow',
'id' => null,
'object' => $actor,
'actor' => null,
],
];
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foreach ($followers as $follower) {
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if (! $follower->private_key || ! $follower->username || ! $follower->user_id || $follower->status === 'delete') {
continue;
}
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$permalink = 'https://'.config('pixelfed.domain.app').'/users/'.$follower->username;
$activity['id'] = $permalink.'#follow/'.$targetPid.'/undo';
$activity['actor'] = $permalink;
$activity['object']['id'] = $permalink.'#follows/'.$targetPid;
$activity['object']['actor'] = $permalink;
$keyId = $permalink.'#main-key';
$payload = json_encode($activity);
$url = $targetInbox;
$headers = HttpSignature::signRaw($follower->private_key, $keyId, $targetInbox, $activity, $addlHeaders);
yield new $client->postAsync($url, [
'curl' => [
CURLOPT_HTTPHEADER => $headers,
CURLOPT_POSTFIELDS => $payload,
CURLOPT_HEADER => true,
],
]);
}
};
$pool = new Pool($client, $requests($followers), [
'concurrency' => config('federation.activitypub.delivery.concurrency'),
'fulfilled' => function ($response, $index) {},
'rejected' => function ($reason, $index) {},
]);
$promise = $pool->promise();
$promise->wait();
}, 'id');
}
}