Piggy bank can now have a group.

app/Repositories/ObjectGroup/CreatesObjectGroups.php

@@ -0,0 +1,61 @@
+<?php
+declare(strict_types=1);
+
+namespace FireflyIII\Repositories\ObjectGroup;
+
+use FireflyIII\Models\ObjectGroup;
+
+/**
+ * Trait CreatesObjectGroups
+ */
+trait CreatesObjectGroups
+{
+    /**
+     * @param string $title
+     *
+     * @return null|ObjectGroup
+     */
+    protected function findObjectGroup(string $title): ?ObjectGroup
+    {
+        return ObjectGroup::where('title', $title)->first();
+    }
+
+    /**
+     * @param string $title
+     *
+     * @return ObjectGroup|null
+     */
+    protected function findOrCreateObjectGroup(string $title): ?ObjectGroup
+    {
+        $group    = null;
+        $maxOrder = $this->getObjectGroupMaxOrder();
+        if (!$this->hasObjectGroup($title)) {
+            return ObjectGroup::create(
+                [
+                    'title' => $title,
+                    'order' => $maxOrder + 1,
+                ]
+            );
+        }
+
+        return $this->findObjectGroup($title);
+    }
+
+    /**
+     * @return int
+     */
+    protected function getObjectGroupMaxOrder(): int
+    {
+        return ObjectGroup::max('order');
+    }
+
+    /**
+     * @param string $title
+     *
+     * @return bool
+     */
+    protected function hasObjectGroup(string $title): bool
+    {
+        return 1 === ObjectGroup::where('title', $title)->count();
+    }
+}