added short invoice calculator and timesheet invoice template #104 (#105)

src/Invoice/ShortInvoiceCalculator.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Kimai package.
+ *
+ * (c) Kevin Papst <kevin@kevinpapst.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Invoice;
+
+use App\Entity\Timesheet;
+
+/**
+ * A calculator that sums up all timesheet records from the model and returns only one
+ * entry for a compact invoice version.
+ *
+ * @author Kevin Papst <kevin@kevinpapst.de>
+ */
+class ShortInvoiceCalculator extends DefaultCalculator
+{
+
+    /**
+     * @return Timesheet[]
+     */
+    public function getEntries()
+    {
+        $timesheet = new Timesheet();
+
+        foreach ($this->model->getEntries() as $entry) {
+            $timesheet->setDuration($timesheet->getDuration() + $entry->getDuration());
+            if ($timesheet->getActivity() === null) {
+                $timesheet->setActivity($entry->getActivity());
+                $timesheet->setEnd($entry->getEnd());
+            }
+            $timesheet->setBegin($entry->getBegin());
+        }
+
+        return [$timesheet];
+    }
+}