first upload all files

Modules/Currency/Listeners/CreateCurrencyRates.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Modules\Currency\Listeners;
+
+use Modules\Setting\Events\SettingSaved;
+use Modules\Currency\Entities\CurrencyRate;
+
+class CreateCurrencyRates
+{
+    /**
+     * Handle the event.
+     *
+     * @param \Modules\Setting\Events\SettingSaved $event
+     * @return void
+     */
+    public function handle(SettingSaved $event)
+    {
+        CurrencyRate::insert($this->rates());
+    }
+
+    /**
+     * Get the currency rates.
+     *
+     * @return array
+     */
+    private function rates()
+    {
+        $currencyRates = CurrencyRate::pluck('currency');
+
+        return collect(request('supported_currencies'))->reject(function ($currency) use ($currencyRates) {
+            return $currencyRates->contains($currency);
+        })->map(function ($currency) {
+            return [
+                'currency' => $currency,
+                'rate' => 1,
+                'created_at' => now(),
+                'updated_at' => now(),
+            ];
+        })->all();
+    }
+}