added support for weekly invoices (#1780)

src/Invoice/Calculator/WeeklyInvoiceCalculator.php

@@ -0,0 +1,32 @@
+<?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\Invoice\Calculator;
+
+use App\Invoice\CalculatorInterface;
+use App\Invoice\InvoiceItemInterface;
+
+/**
+ * A calculator that sums up the invoice item records per week.
+ */
+class WeeklyInvoiceCalculator extends AbstractSumInvoiceCalculator implements CalculatorInterface
+{
+    protected function calculateSumIdentifier(InvoiceItemInterface $invoiceItem): string
+    {
+        return $invoiceItem->getBegin()->format('W');
+    }
+
+    /**
+     * @return string
+     */
+    public function getId(): string
+    {
+        return 'weekly';
+    }
+}

src/Invoice/Hydrator/InvoiceItemDefaultHydrator.php

@@ -83,6 +83,8 @@ class InvoiceItemDefaultHydrator implements InvoiceItemHydrator
             'entry.end_time' => $formatter->getFormattedTime($end),
             'entry.end_timestamp' => $end->getTimestamp(),
             'entry.date' => $formatter->getFormattedDateTime($begin),
+            'entry.week' => \intval($begin->format('W')),
+            'entry.weekyear' => $begin->format('o'),
             'entry.user_id' => $user->getId(),
             'entry.user_name' => $user->getUsername(),
             'entry.user_title' => $user->getTitle(),