use events for budget calculation (#2544)

src/Customer/CustomerStatisticService.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Customer;
+
+use App\Entity\Customer;
+use App\Event\CustomerStatisticEvent;
+use App\Model\CustomerStatistic;
+use App\Repository\CustomerRepository;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+
+/**
+ * @final
+ */
+class CustomerStatisticService
+{
+    private $repository;
+    private $dispatcher;
+
+    public function __construct(CustomerRepository $customerRepository, EventDispatcherInterface $dispatcher)
+    {
+        $this->repository = $customerRepository;
+        $this->dispatcher = $dispatcher;
+    }
+
+    public function getCustomerStatistics(Customer $customer): CustomerStatistic
+    {
+        $statistic = $this->repository->getCustomerStatistics($customer);
+        $event = new CustomerStatisticEvent($customer, $statistic);
+        $this->dispatcher->dispatch($event);
+
+        return $statistic;
+    }
+}