fix billable calculation on timesheet restart (#3225)

src/Timesheet/Calculator/BillableCalculator.php

@@ -0,0 +1,53 @@
+<?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\Timesheet\Calculator;
+
+use App\Entity\Timesheet;
+use App\Timesheet\CalculatorInterface;
+
+/**
+ * Implementation to calculate the billable field for a timesheet record.
+ */
+class BillableCalculator implements CalculatorInterface
+{
+    public function calculate(Timesheet $record)
+    {
+        switch ($record->getBillableMode()) {
+            case Timesheet::BILLABLE_NO:
+                $record->setBillable(false);
+                break;
+            case Timesheet::BILLABLE_YES:
+                $record->setBillable(true);
+                break;
+            case Timesheet::BILLABLE_AUTOMATIC:
+                $billable = true;
+
+                $activity = $record->getActivity();
+                if ($activity !== null && !$activity->isBillable()) {
+                    $billable = false;
+                }
+
+                $project = $record->getProject();
+                if ($billable && $project !== null && !$project->isBillable()) {
+                    $billable = false;
+                }
+
+                if ($billable && $project !== null) {
+                    $customer = $project->getCustomer();
+                    if ($customer !== null && !$customer->isBillable()) {
+                        $billable = false;
+                    }
+                }
+
+                $record->setBillable($billable);
+                break;
+        }
+    }
+}