pixelfed/pixelfed

<?php

namespace App\Jobs\StoryPipeline;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldBeUnique;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Storage;
use App\Story;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;
use App\Transformer\ActivityPub\Verb\DeleteStory;
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 StoryDelete 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;

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

        StoryService::removeRotateQueue($story->id);
        StoryService::delLatest($story->profile_id);
        StoryService::delById($story->id);

        if(Storage::exists($story->path) == true) {
            Storage::delete($story->path);
        }

        $story->views()->delete();

        $profile = $story->profile;

        $activity = [
            '@context' => 'https://www.w3.org/ns/activitystreams',
            'id' => $story->url() . '#delete',
            'type' => 'Delete',
            'actor' => $profile->permalink(),
            'object' => [
                'id' => $story->url(),
                'type' => 'Story',
            ],
        ];

        $this->fanoutExpiry($profile, $activity);

        // delete notifications
        // delete polls
        // delete reports

        $story->delete();

        return;
    }

    protected function fanoutExpiry($profile, $activity)
    {
        $audience = FollowerService::softwareAudience($profile->id, 'pixelfed');

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

        $payload = json_encode($activity);

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

        $requests = function($audience) use ($client, $activity, $profile, $payload) {
            foreach($audience as $url) {
                $version = config('pixelfed.version');
                $appUrl = config('app.url');
                $headers = HttpSignature::sign($profile, $url, $activity, [
                    'Content-Type'    => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
                    'User-Agent'    => "(Pixelfed/{$version}; +{$appUrl})",
                ]);
                yield function() use ($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();
    }
}