<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\Backup\Filesystem\Iterator;

/**
* File lines iterator
*
* @author Magento Core Team <core@magentocommerce.com>
*/
class File extends \SplFileObject
{
/**
* The statement that was last read during iteration
*
* @var string
*/
protected $_currentStatement = '';

/**
* Return current sql statement
*
* @return string
*/
public function current()
{
return $this->_currentStatement;
}

/**
* Iterate to next sql statement in file
*
* @return void
*/
public function next()
{
$this->_currentStatement = '';
while (!$this->eof()) {
$line = $this->fgets();
if (strlen(trim($line))) {
$this->_currentStatement .= $line;
if ($this->_isLineLastInCommand($line)) {
break;
}
}
}
}

/**
* Return to first statement
*
* @return void
*/
public function rewind()
{
parent::rewind();
$this->next();
}

/**
* Check whether provided string is comment
*
* @param string $line
* @return bool
*/
protected function _isComment($line)
{
return $line[0] == '#' || substr($line, 0, 2) == '--';
}

/**
* Check is line a last in sql command
*
* @param string $line
* @return bool
*/
protected function _isLineLastInCommand($line)
{
$cleanLine = trim($line);
$lineLength = strlen($cleanLine);

$returnResult = false;
if ($lineLength > 0) {
$lastSymbolIndex = $lineLength - 1;
if ($cleanLine[$lastSymbolIndex] == ';') {
$returnResult = true;
}
}

return $returnResult;
}
}