Add new activity logging code to replace audit log

app/Services/Activity/ActivityLogTargetableService.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Pterodactyl\Services\Activity;
+
+use InvalidArgumentException;
+use Illuminate\Database\Eloquent\Model;
+
+class ActivityLogTargetableService
+{
+    protected ?Model $actor = null;
+
+    protected ?Model $subject = null;
+
+    public function setActor(Model $actor): void
+    {
+        if (!is_null($this->actor)) {
+            throw new InvalidArgumentException('Cannot call ' . __METHOD__ . ' when an actor is already set on the instance.');
+        }
+
+        $this->actor = $actor;
+    }
+
+    public function setSubject(Model $subject): void
+    {
+        if (!is_null($this->subject)) {
+            throw new InvalidArgumentException('Cannot call ' . __METHOD__ . ' when a target is already set on the instance.');
+        }
+
+        $this->subject = $subject;
+    }
+
+    public function actor(): ?Model
+    {
+        return $this->actor;
+    }
+
+    public function subject(): ?Model
+    {
+        return $this->subject;
+    }
+
+    public function reset(): void
+    {
+        $this->actor = null;
+        $this->subject = null;
+    }
+}