CSV importer now indicates the problems it has.

app/Helpers/Csv/Mapper/TransactionCurrency.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace FireflyIII\Helpers\Csv\Mapper;
+
+use FireflyIII\Models\TransactionCurrency as TC;
+
+/**
+ * Class TransactionCurrency
+ *
+ * @package FireflyIII\Helpers\Csv\Mapper
+ */
+class TransactionCurrency implements MapperInterface
+{
+
+    /**
+     * @return array
+     */
+    public function getMap()
+    {
+        $currencies = TC::get();
+        $list       = [];
+        foreach ($currencies as $currency) {
+            $list[$currency->id] = $currency->name . ' (' . $currency->code . ')';
+        }
+
+        return $list;
+    }
+}