magento2 : How to copy a file programmatically in Controller

Question

I have a controller execute() function in which I would like to make a file copy from a directory to another.

In Magento 1.9 I was using :

Mage::helper('core/file_storage_database')->copyFile($_OriginalPath, $_NewPath);

How to perform that in Magento2?

Edit 3:

I tried :

use Magento\Framework\App\Filesystem\DirectoryList;

    protected $_FileDB;

        public function __construct(
            \Magento\MediaStorage\Helper\File\Storage\Database $FileDB

                )
        {
            parent::__construct($context);
            $this->_FileDB = $FileDB;
        }

and

$this->_FileDB->copyFile($_oldPath,$_NewPath);

and still no file copied...

Answer 1

You can use cp() function of class Magento\Framework\Filesystem\Io\File

vendor/magento/framework/Filesystem/Io/File.php

protected $_fileSystem;

public function __construct(
    ...
    \Magento\Framework\Filesystem\Io\File $filesystemIo,
    ...
) {
    $this->filesystemIo = $filesystemIo;
}
 ...

$filePath  = '/var/www/html/var/import/order_status.csv'
$$copyFileFullPath  = '/var/www/html/var/import/readfiles/order_status.csv'

$filePath = $this->_fileSystemIo->cp($filePath, $copyFileFullPath);

 ...

Answer 2

I think this will work for you. For DB storage. Magento\MediaStorage\Helper\File\Storage\Database

public function copyFile($oldName, $newName)
{
    if ($this->checkDbUsage()) {
        $this->getStorageDatabaseModel()->copyFile(
            $this->_removeAbsPathFromFileName($oldName),
            $this->_removeAbsPathFromFileName($newName)
        );
    }
}

It basically calls the copyFile() of this class \Magento\MediaStorage\Model\File\Storage\Database which in turn call this class Magento\MediaStorage\Model\ResourceModel\File\Storage\Database.