<?php

namespace Stemcell\Customer\Controller\Adminhtml\Salesperson;

use Magento\Framework\App\Action\HttpGetActionInterface;

class Sample implements HttpGetActionInterface
{
    protected \Magento\Framework\App\Response\Http\FileFactory $fileFactory;
    private \Magento\Framework\Module\Dir $moduleDir;

    public function __construct(
        \Magento\Framework\App\Response\Http\FileFactory $fileFactory,
        \Magento\Framework\Module\Dir $moduleDir
    ) {
        $this->fileFactory = $fileFactory;
        $this->moduleDir = $moduleDir;
    }

    /**
     * @throws \Exception
     */
    public function execute()
    {
        $file = $this->moduleDir->getDir('Stemcell_Customer').'/data/sample/salesperson.xlsx';
        $content['type'] = 'filename';
        $content['value'] = $file;
        $content['rm'] = 0;
        return $this->fileFactory->create('salesperson.xlsx', $content);
    }
}