pixelfed/app/Util/ActivityPub/Inbox.php

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<?php
namespace App\Util\ActivityPub;
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use Cache, DB, Log, Purify, Redis, Validator;
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use App\{
Activity,
Follower,
FollowRequest,
Like,
Notification,
Profile,
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Status,
StatusHashtag,
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};
use Carbon\Carbon;
use App\Util\ActivityPub\Helpers;
use App\Jobs\LikePipeline\LikePipeline;
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use App\Jobs\FollowPipeline\FollowPipeline;
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use App\Util\ActivityPub\Validator\Accept as AcceptValidator;
use App\Util\ActivityPub\Validator\Announce as AnnounceValidator;
use App\Util\ActivityPub\Validator\Follow as FollowValidator;
use App\Util\ActivityPub\Validator\Like as LikeValidator;
use App\Util\ActivityPub\Validator\UndoFollow as UndoFollowValidator;
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class Inbox
{
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protected $headers;
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protected $profile;
protected $payload;
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protected $logger;
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public function __construct($headers, $profile, $payload)
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{
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$this->headers = $headers;
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$this->profile = $profile;
$this->payload = $payload;
}
public function handle()
{
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$this->handleVerb();
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// if(!Activity::where('data->id', $this->payload['id'])->exists()) {
// (new Activity())->create([
// 'to_id' => $this->profile->id,
// 'data' => json_encode($this->payload)
// ]);
// }
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return;
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}
public function handleVerb()
{
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$verb = (string) $this->payload['type'];
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switch ($verb) {
case 'Create':
$this->handleCreateActivity();
break;
case 'Follow':
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if(FollowValidator::validate($this->payload) == false) { return; }
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$this->handleFollowActivity();
break;
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case 'Announce':
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if(AnnounceValidator::validate($this->payload) == false) { return; }
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$this->handleAnnounceActivity();
break;
case 'Accept':
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if(AcceptValidator::validate($this->payload) == false) { return; }
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$this->handleAcceptActivity();
break;
case 'Delete':
$this->handleDeleteActivity();
break;
case 'Like':
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if(LikeValidator::validate($this->payload) == false) { return; }
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$this->handleLikeActivity();
break;
case 'Reject':
$this->handleRejectActivity();
break;
case 'Undo':
$this->handleUndoActivity();
break;
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default:
// TODO: decide how to handle invalid verbs.
break;
}
}
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public function verifyNoteAttachment()
{
$activity = $this->payload['object'];
if(isset($activity['inReplyTo']) &&
!empty($activity['inReplyTo']) &&
Helpers::validateUrl($activity['inReplyTo'])
) {
// reply detected, skip attachment check
return true;
}
$valid = Helpers::verifyAttachments($activity);
return $valid;
}
public function actorFirstOrCreate($actorUrl)
{
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return Helpers::profileFetch($actorUrl);
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}
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public function handleCreateActivity()
{
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$activity = $this->payload['object'];
if(!$this->verifyNoteAttachment()) {
return;
}
if($activity['type'] == 'Note' && !empty($activity['inReplyTo'])) {
$this->handleNoteReply();
} elseif($activity['type'] == 'Note' && !empty($activity['attachment'])) {
$this->handleNoteCreate();
}
}
public function handleNoteReply()
{
$activity = $this->payload['object'];
$actor = $this->actorFirstOrCreate($this->payload['actor']);
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if(!$actor || $actor->domain == null) {
return;
}
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$inReplyTo = $activity['inReplyTo'];
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$url = isset($activity['url']) ? $activity['url'] : $activity['id'];
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Helpers::statusFirstOrFetch($url, true);
return;
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}
public function handleNoteCreate()
{
$activity = $this->payload['object'];
$actor = $this->actorFirstOrCreate($this->payload['actor']);
if(!$actor || $actor->domain == null) {
return;
}
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if($actor->followers()->count() == 0) {
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return;
}
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$url = isset($activity['url']) ? $activity['url'] : $activity['id'];
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if(Status::whereUrl($url)->exists()) {
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return;
}
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Helpers::statusFetch($url);
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return;
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}
public function handleFollowActivity()
{
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$actor = $this->actorFirstOrCreate($this->payload['actor']);
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$target = $this->profile;
if(!$actor || $actor->domain == null || $target->domain !== null) {
return;
}
if(
Follower::whereProfileId($actor->id)
->whereFollowingId($target->id)
->exists() ||
FollowRequest::whereFollowerId($actor->id)
->whereFollowingId($target->id)
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->exists()
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) {
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return;
}
if($target->is_private == true) {
FollowRequest::firstOrCreate([
'follower_id' => $actor->id,
'following_id' => $target->id
]);
} else {
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$follower = new Follower;
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$follower->profile_id = $actor->id;
$follower->following_id = $target->id;
$follower->local_profile = empty($actor->domain);
$follower->save();
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FollowPipeline::dispatch($follower);
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// send Accept to remote profile
$accept = [
'@context' => 'https://www.w3.org/ns/activitystreams',
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'id' => $target->permalink().'#accepts/follows/' . $follower->id,
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'type' => 'Accept',
'actor' => $target->permalink(),
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'object' => [
'id' => $this->payload['id'],
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'actor' => $actor->permalink(),
'type' => 'Follow',
'object' => $target->permalink()
]
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];
Helpers::sendSignedObject($target, $actor->inbox_url, $accept);
}
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}
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public function handleAnnounceActivity()
{
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$actor = $this->actorFirstOrCreate($this->payload['actor']);
$activity = $this->payload['object'];
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if(!$actor || $actor->domain == null) {
return;
}
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if(Helpers::validateLocalUrl($activity) == false) {
return;
}
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$parent = Helpers::statusFetch($activity);
if(empty($parent)) {
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return;
}
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$status = Status::firstOrCreate([
'profile_id' => $actor->id,
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'reblog_of_id' => $parent->id,
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'type' => 'share'
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]);
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Notification::firstOrCreate([
'profile_id' => $parent->profile->id,
'actor_id' => $actor->id,
'action' => 'share',
'message' => $status->replyToText(),
'rendered' => $status->replyToHtml(),
'item_id' => $parent->id,
'item_type' => 'App\Status'
]);
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$parent->reblogs_count = $parent->shares()->count();
$parent->save();
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}
public function handleAcceptActivity()
{
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$actor = $this->payload['object']['actor'];
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$obj = $this->payload['object']['object'];
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$type = $this->payload['object']['type'];
if($type !== 'Follow') {
return;
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}
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$actor = Helpers::validateLocalUrl($actor);
$target = Helpers::validateUrl($obj);
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if(!$actor || !$target) {
return;
}
$actor = Helpers::profileFetch($actor);
$target = Helpers::profileFetch($target);
$request = FollowRequest::whereFollowerId($actor->id)
->whereFollowingId($target->id)
->whereIsRejected(false)
->first();
if(!$request) {
return;
}
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$follower = Follower::firstOrCreate([
'profile_id' => $actor->id,
'following_id' => $target->id,
]);
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FollowPipeline::dispatch($follower);
$request->delete();
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}
public function handleDeleteActivity()
{
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if(!isset(
$this->payload['actor'],
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$this->payload['object']
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)) {
return;
}
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$actor = $this->payload['actor'];
$obj = $this->payload['object'];
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if(is_string($obj) == true) {
return;
}
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$type = $this->payload['object']['type'];
$typeCheck = in_array($type, ['Person', 'Tombstone']);
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if(!Helpers::validateUrl($actor) || !Helpers::validateUrl($obj['id']) || !$typeCheck) {
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return;
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}
if(parse_url($obj['id'], PHP_URL_HOST) !== parse_url($actor, PHP_URL_HOST)) {
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return;
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}
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$id = $this->payload['object']['id'];
switch ($type) {
case 'Person':
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// todo: fix race condition
return;
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$profile = Helpers::profileFetch($actor);
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if(!$profile || $profile->private_key != null) {
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return;
}
Notification::whereActorId($profile->id)->delete();
$profile->avatar()->delete();
$profile->followers()->delete();
$profile->following()->delete();
$profile->likes()->delete();
$profile->media()->delete();
$profile->statuses()->delete();
$profile->delete();
return;
break;
case 'Tombstone':
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$profile = Helpers::profileFetch($actor);
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$status = Status::whereProfileId($profile->id)
->whereUri($id)
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->orWhere('url', $id)
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->orWhere('object_url', $id)
->first();
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if(!$status) {
return;
}
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$status->media()->delete();
$status->likes()->delete();
$status->shares()->delete();
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$status->delete();
return;
break;
default:
return;
break;
}
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}
public function handleLikeActivity()
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{
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$actor = $this->payload['actor'];
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if(!Helpers::validateUrl($actor)) {
return;
}
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$profile = self::actorFirstOrCreate($actor);
$obj = $this->payload['object'];
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if(!Helpers::validateUrl($obj)) {
return;
}
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$status = Helpers::statusFirstOrFetch($obj);
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if(!$status || !$profile) {
return;
}
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$like = Like::firstOrCreate([
'profile_id' => $profile->id,
'status_id' => $status->id
]);
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if($like->wasRecentlyCreated == true) {
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$status->likes_count = $status->likes()->count();
$status->save();
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LikePipeline::dispatch($like);
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}
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return;
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}
public function handleRejectActivity()
{
}
public function handleUndoActivity()
{
$actor = $this->payload['actor'];
$profile = self::actorFirstOrCreate($actor);
$obj = $this->payload['object'];
switch ($obj['type']) {
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case 'Accept':
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break;
case 'Announce':
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$obj = $obj['object'];
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if(!Helpers::validateLocalUrl($obj)) {
return;
}
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$status = Helpers::statusFetch($obj);
if(!$status) {
return;
}
Status::whereProfileId($profile->id)
->whereReblogOfId($status->id)
->forceDelete();
Notification::whereProfileId($status->profile->id)
->whereActorId($profile->id)
->whereAction('share')
->whereItemId($status->reblog_of_id)
->whereItemType('App\Status')
->forceDelete();
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break;
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case 'Block':
break;
case 'Follow':
$following = self::actorFirstOrCreate($obj['object']);
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if(!$following) {
return;
}
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Follower::whereProfileId($profile->id)
->whereFollowingId($following->id)
->delete();
Notification::whereProfileId($following->id)
->whereActorId($profile->id)
->whereAction('follow')
->whereItemId($following->id)
->whereItemType('App\Profile')
->forceDelete();
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break;
case 'Like':
$status = Helpers::statusFirstOrFetch($obj['object']);
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if(!$status) {
return;
}
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Like::whereProfileId($profile->id)
->whereStatusId($status->id)
->forceDelete();
Notification::whereProfileId($status->profile->id)
->whereActorId($profile->id)
->whereAction('like')
->whereItemId($status->id)
->whereItemType('App\Status')
->forceDelete();
break;
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}
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return;
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}
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}