update

app/Services/FollowService.php

@@ -2,6 +2,9 @@
 
 namespace App\Services;
 
+use App\Models\User;
+use App\Notifications\UserFollowedNotification;
+use App\Events\Achievements\AchievementCheckRequested;
 use Illuminate\Support\Facades\DB;
 
 /**
@@ -16,6 +19,8 @@ use Illuminate\Support\Facades\DB;
  */
 final class FollowService
 {
+    public function __construct(private readonly XPService $xp) {}
+
     /**
      * Follow $targetId on behalf of $actorId.
      *
@@ -60,6 +65,15 @@ final class FollowService
                     targetId: $targetId,
                 );
             } catch (\Throwable) {}
+
+            $targetUser = User::query()->find($targetId);
+            $actorUser = User::query()->find($actorId);
+            if ($targetUser && $actorUser) {
+                $targetUser->notify(new UserFollowedNotification($actorUser));
+            }
+
+            $this->xp->awardFollowerReceived($targetId, $actorId);
+            event(new AchievementCheckRequested($targetId));
         }
 
         return $inserted;