Feat: Adds multi currency to imports and exports (#89)

* Also adds ability for user to export configurations

app/Imports/Sheets/ConfigSheet.php

@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Imports\Sheets;
+
+use App\Models\BackupImport;
+use App\Models\Holding;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\DB;
+use Maatwebsite\Excel\Concerns\SkipsEmptyRows;
+use Maatwebsite\Excel\Concerns\ToCollection;
+use Maatwebsite\Excel\Concerns\WithEvents;
+use Maatwebsite\Excel\Concerns\WithHeadingRow;
+use Maatwebsite\Excel\Concerns\WithValidation;
+use Maatwebsite\Excel\Events\BeforeSheet;
+
+class ConfigSheet implements SkipsEmptyRows, ToCollection, WithEvents, WithHeadingRow, WithValidation
+{
+    public function __construct(
+        public BackupImport $backupImport
+    ) {}
+
+    public function registerEvents(): array
+    {
+        return [
+            BeforeSheet::class => function (BeforeSheet $event) {
+                DB::commit();
+                $this->backupImport->update([
+                    'message' => __('Importing configurations...'),
+                ]);
+                DB::beginTransaction();
+            },
+        ];
+    }
+
+    public function collection(Collection $configs)
+    {
+        $user = auth()->user();
+
+        foreach ($configs as $config) {
+
+            switch ($config['key']) {
+                case 'name':
+                    $user->name = $config['value'];
+                    $user->save();
+                    break;
+
+                case 'locale':
+                    $user->setOption('locale', $config['value']);
+                    $user->save();
+                    break;
+
+                case 'display_currency':
+                    $user->setOption('display_currency', $config['value']);
+                    $user->save();
+                    break;
+
+                case 'reinvest_dividends':
+
+                    Holding::myHoldings()->where('id', $config['value'])->update([
+                        'reinvest_dividends' => true,
+                    ]);
+                    break;
+
+                default:
+                    break;
+            }
+        }
+    }
+
+    public function rules(): array
+    {
+        return [
+            'key' => ['required', 'string'],
+            'value' => ['required', 'string'],
+        ];
+    }
+}