Refactored pardsing of description for FinTS import.

Added some tests.

app/Support/FinTS/MetadataParser.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * FinTS.php
+ * Copyright (c) 2018 https://github.com/bnw
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+declare(strict_types=1);
+
+namespace FireflyIII\Support\FinTS;
+use Fhp\Model\StatementOfAccount\Transaction as FinTSTransaction;
+
+class MetadataParser
+{
+    function getDescription(FinTSTransaction $transaction)
+    {
+        //Given a description like 'EREF+AbcCRED+DE123SVWZ+DefABWA+Ghi' or 'EREF+AbcCRED+DE123SVWZ+Def' return 'Def'
+        $finTSDescription = $transaction->getDescription1();
+        if (preg_match('/SVWZ\+([^\+]*)([A-Z]{4}\+|$)/', $finTSDescription, $matches) === 1) {
+            return $matches[1];
+        }
+        return $finTSDescription;
+    }
+}