Cleanup post processing.

app/Helpers/Csv/PostProcessing/Bill.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace FireflyIII\Helpers\Csv\PostProcessing;
+
+/**
+ * Class Bill
+ *
+ * @package FireflyIII\Helpers\Csv\PostProcessing
+ */
+class Bill implements PostProcessorInterface
+{
+
+    /** @var  array */
+    protected $data;
+
+    /**
+     * @return array
+     */
+    public function process()
+    {
+
+        // get bill id.
+        if (!is_null($this->data['bill'])) {
+            $this->data['bill-id'] = $this->data['bill']->id;
+        }
+
+        return $this->data;
+    }
+
+    /**
+     * @param array $data
+     */
+    public function setData(array $data)
+    {
+        $this->data = $data;
+    }
+}