Update FollowerController, send Follow ActivityPub object to remote instances

app/Http/Controllers/FollowerController.php

@@ -11,6 +11,7 @@ use App\{
 use Auth, Cache;
 use Illuminate\Http\Request;
 use App\Jobs\FollowPipeline\FollowPipeline;
+use App\Util\ActivityPub\Helpers;
 
 class FollowerController extends Controller
 {
@@ -55,13 +56,21 @@ class FollowerController extends Controller
         $isFollowing = Follower::whereProfileId($user->id)->whereFollowingId($target->id)->count();
 
         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');
+            }
+
             $follow = FollowRequest::firstOrCreate([
                 'follower_id' => $user->id,
                 'following_id' => $target->id
             ]);
-            if($remote == true) {
-                
-            }
+            if($remote == true && config('federation.activitypub.remoteFollow') == true) {
+                $this->sendFollow($user, $target);
+            } 
         } elseif ($isFollowing == 0) {
             if($user->following()->count() >= Follower::MAX_FOLLOWING) {
                 abort(400, 'You cannot follow more than ' . Follower::MAX_FOLLOWING . ' accounts');
@@ -88,4 +97,22 @@ class FollowerController extends Controller
         Cache::forget('user:account:id:'.$target->user_id);
         Cache::forget('user:account:id:'.$user->user_id);
     }
+
+    protected function sendFollow($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);
+    }
 }