added invoice archive & configurable invoice numbers (#1541)

src/Invoice/InvoiceFilename.php

@@ -0,0 +1,49 @@
+<?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;
+
+use Symfony\Component\String\UnicodeString;
+
+final class InvoiceFilename
+{
+    /**
+     * @var string
+     */
+    private $filename;
+
+    public function __construct(InvoiceModel $model)
+    {
+        $filename = $model->getNumberGenerator()->getInvoiceNumber();
+
+        $filename = str_replace(['/', '\\'], '-', $filename);
+
+        $company = $model->getCustomer()->getCompany();
+        if (empty($company)) {
+            $company = $model->getCustomer()->getName();
+        }
+
+        if (!empty($company)) {
+            $company = new UnicodeString($company);
+            $filename .= '-' . $company->snake();
+        }
+
+        $this->filename = $filename;
+    }
+
+    public function getFilename()
+    {
+        return $this->filename;
+    }
+
+    public function __toString()
+    {
+        return $this->getFilename();
+    }
+}