add currency console command

app/Console/Commands/AddCurrency.php

+<?php
+
+namespace App\Console\Commands;
+
+use App\Currency;
+use App\Language;
+use App\Modifier;
+use App\Resource;
+use App\ResourceCategory;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\DB;
+
+/**
+ * Class ImportResources
+ * @package App\Console\Commands
+ * @see https://laravel.com/docs/5.6/artisan
+ */
+class AddCurrency extends Command
+{
+
+    protected $signature = 'make:currency
+        {currency_code : Currency code like; GBP or USD}
+        {--M|multiplier= : Optionally when copying across all modifiers to this new currency, multiply them by this value.}';
+
+    protected $description = 'Inject a new currency with a multiplier of the existing values.';
+
+    public function handle()
+    {
+        if ($this->anticipate('This is intended for debugging, would you like to continue?', ['Yes', 'No'], 'Yes') !== 'Yes') {
+            $this->comment('No changes made');
+            return;
+        }
+
+        $currency_code = $this->argument('currency_code');
+        $multiplier = floatval($this->option('multiplier'));
+
+        $this->line('<info>Currency Code:</info> ' . $currency_code);
+        $this->line('<info>Currency Multiplier:</info> ' . $multiplier);
+
+        DB::beginTransaction();
+
+        $currency = new Currency;
+        $currency->currency_code = $currency_code;
+        $currency->save();
+
+        $default_currency = Currency::where('currency_code', 'EUR')->firstOrFail();
+
+        $total_modifiers = Modifier::where('currency_id', $default_currency->id)->count();
+        $this->output->progressStart($total_modifiers);
+
+        $modifiers = Modifier::where('currency_id', $default_currency->id)->get();
+        foreach ($modifiers as $modifier) {
+            $new_modifier = new Modifier();
+            $new_modifier->model = $modifier->model;
+            $new_modifier->model_id = $modifier->model_id;
+            $new_modifier->modifier_category_id = $modifier->modifier_category_id;
+            $new_modifier->currency_id = $currency->id;
+            $new_modifier->amount = $modifier->amount * $multiplier;
+            $new_modifier->save();
+
+            $this->output->progressAdvance();
+        }
+
+        $this->output->progressFinish();
+        DB::commit();
+
+        $this->info('Added new currency and updated modifiers');
+    }
+}
\ No newline at end of file

app/Console/Kernel.php

@@ -2,6 +2,7 @@
 
 namespace App\Console;
 
+use App\Console\Commands\AddCurrency;
 use App\Console\Commands\ImportResources;
 use Illuminate\Console\Scheduling\Schedule;
 use Laravel\Lumen\Console\Kernel as ConsoleKernel;
@@ -14,7 +15,8 @@ class Kernel extends ConsoleKernel
      * @var array
      */
     protected $commands = [
-        ImportResources::class
+        ImportResources::class,
+        AddCurrency::class
     ];
 
     /**