pixelfed/app/Http/Controllers/FollowerController.php

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<?php
namespace App\Http\Controllers;
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use App\{
Follower,
FollowRequest,
Profile,
UserFilter
};
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use Auth, Cache;
use Illuminate\Http\Request;
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use App\Jobs\FollowPipeline\FollowPipeline;
use App\Util\ActivityPub\Helpers;
class FollowerController extends Controller
{
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public function __construct()
{
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$this->middleware('auth');
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}
public function store(Request $request)
{
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$this->validate($request, [
'item' => 'required|integer',
]);
$item = $request->input('item');
$this->handleFollowRequest($item);
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if($request->wantsJson()) {
return response()->json([
200
], 200);
}
return redirect()->back();
}
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protected function handleFollowRequest($item)
{
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$user = Auth::user()->profile;
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$target = Profile::where('id', '!=', $user->id)->whereNull('status')->findOrFail($item);
$private = (bool) $target->is_private;
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$remote = (bool) $target->domain;
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$blocked = UserFilter::whereUserId($target->id)
->whereFilterType('block')
->whereFilterableId($user->id)
->whereFilterableType('App\Profile')
->exists();
if($blocked == true) {
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abort(400, 'You cannot follow this user.');
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}
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$isFollowing = Follower::whereProfileId($user->id)->whereFollowingId($target->id)->exists();
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if($private == true && $isFollowing == 0 || $remote == true) {
if($user->following()->count() >= Follower::MAX_FOLLOWING) {
abort(400, 'You cannot follow more than ' . Follower::MAX_FOLLOWING . ' accounts');
}
if($user->following()->where('followers.created_at', '>', now()->subHour())->count() >= Follower::FOLLOW_PER_HOUR) {
abort(400, 'You can only follow ' . Follower::FOLLOW_PER_HOUR . ' users per hour');
}
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$follow = FollowRequest::firstOrCreate([
'follower_id' => $user->id,
'following_id' => $target->id
]);
if($remote == true && config('federation.activitypub.remoteFollow') == true) {
$this->sendFollow($user, $target);
}
} elseif ($isFollowing == 0) {
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if($user->following()->count() >= Follower::MAX_FOLLOWING) {
abort(400, 'You cannot follow more than ' . Follower::MAX_FOLLOWING . ' accounts');
}
if($user->following()->where('followers.created_at', '>', now()->subHour())->count() >= Follower::FOLLOW_PER_HOUR) {
abort(400, 'You can only follow ' . Follower::FOLLOW_PER_HOUR . ' users per hour');
}
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$follower = new Follower();
$follower->profile_id = $user->id;
$follower->following_id = $target->id;
$follower->save();
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if($remote == true && config('federation.activitypub.remoteFollow') == true) {
$this->sendFollow($user, $target);
}
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FollowPipeline::dispatch($follower);
} else {
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$request = FollowRequest::whereFollowerId($user->id)->whereFollowingId($target->id)->exists();
$follower = Follower::whereProfileId($user->id)->whereFollowingId($target->id)->exists();
if($remote == true && $request && !$follower) {
$this->sendFollow($user, $target);
}
if($remote == true && $follower) {
$this->sendUndoFollow($user, $target);
}
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$follower->delete();
}
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Cache::forget('profile:following:'.$target->id);
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Cache::forget('profile:followers:'.$target->id);
Cache::forget('profile:following:'.$user->id);
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Cache::forget('profile:followers:'.$user->id);
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Cache::forget('api:local:exp:rec:'.$user->id);
Cache::forget('user:account:id:'.$target->user_id);
Cache::forget('user:account:id:'.$user->user_id);
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}
protected function sendFollow($user, $target)
{
if($target->domain == null || $user->domain != null) {
return;
}
$payload = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'type' => 'Follow',
'actor' => $user->permalink(),
'object' => $target->permalink()
];
$inbox = $target->sharedInbox ?? $target->inbox_url;
Helpers::sendSignedObject($user, $inbox, $payload);
}
protected function sendUndoFollow($user, $target)
{
if($target->domain == null || $user->domain != null) {
return;
}
$payload = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => $user->permalink('#follow/'.$target->id.'/undo'),
'type' => 'Undo',
'actor' => $user->permalink(),
'object' => [
'id' => $user->permalink('#follows/'.$target->id),
'actor' => $user->permalink(),
'object' => $target->permalink(),
'type' => 'Follow'
]
];
$inbox = $target->sharedInbox ?? $target->inbox_url;
Helpers::sendSignedObject($user, $inbox, $payload);
}
}