exchange-2.0/app/Http/Controllers/Exports/ExportController.php

<?php

namespace App\Http\Controllers\Exports;


use App\Classes\Modules\Exports\Services\ExportsSalesInvoiceReport;
use Illuminate\Http\Request;
use Maatwebsite\Excel\Excel;
use Illuminate\Support\Facades\Storage;
use App\Classes\General\AWSS3Helper;

class ExportController
{
    public function salesInvoices(Request $request){
        $exportsTransactions = new ExportsSalesInvoiceReport($request);
        $exportFileName = 'Exchange - Sales Invoice Report.xls';
        $filesystemDriver = Storage::getDefaultDriver();
        if($filesystemDriver === 's3'){
            return response([ 'src' =>  AWSS3Helper::S3Exportable($exportFileName, $exportsTransactions) ]);
        }
        else{
            $response = $exportsTransactions->download($exportFileName, Excel::XLS, ['Content-Type' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet']);
            ob_end_clean();
        }
        return $response;
    }
}