Upgrade to Laravel 9 (#4413)

Co-authored-by: DaneEveritt <dane@daneeveritt.com>

app/Services/Activity/ActivityLogBatchService.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Pterodactyl\Services\Activity;
+
+use Ramsey\Uuid\Uuid;
+
+class ActivityLogBatchService
+{
+    protected int $transaction = 0;
+    protected ?string $uuid = null;
+
+    /**
+     * Returns the UUID of the batch, or null if there is not a batch currently
+     * being executed.
+     */
+    public function uuid(): ?string
+    {
+        return $this->uuid;
+    }
+
+    /**
+     * Starts a new batch transaction. If there is already a transaction present
+     * this will be nested.
+     */
+    public function start(): void
+    {
+        if ($this->transaction === 0) {
+            $this->uuid = Uuid::uuid4()->toString();
+        }
+
+        ++$this->transaction;
+    }
+
+    /**
+     * Ends a batch transaction, if this is the last transaction in the stack
+     * the UUID will be cleared out.
+     */
+    public function end(): void
+    {
+        $this->transaction = max(0, $this->transaction - 1);
+
+        if ($this->transaction === 0) {
+            $this->uuid = null;
+        }
+    }
+
+    /**
+     * Executes the logic provided within the callback in the scope of an activity
+     * log batch transaction.
+     */
+    public function transaction(\Closure $callback): mixed
+    {
+        $this->start();
+        $result = $callback($this->uuid());
+        $this->end();
+
+        return $result;
+    }
+}