<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

namespace Magento\Framework\File;

use Magento\Framework\Filesystem\Driver\File;

/**
* Csv parse
*
* @author Magento Core Team <core@magentocommerce.com>
*/
class Csv
{
/**
* @var int
*/
protected $_lineLength = 0;

/**
* @var string
*/
protected $_delimiter = ',';

/**
* @var string
*/
protected $_enclosure = '"';

/**
* @var File
*/
protected $file;

/**
* Constructor
*
* @param File $file File Driver used for writing CSV
*/
public function __construct(File $file)
{
$this->file = $file;
}

/**
* Set max file line length
*
* @param int $length
* @return \Magento\Framework\File\Csv
*/
public function setLineLength($length)
{
$this->_lineLength = $length;
return $this;
}

/**
* Set CSV column delimiter
*
* @param string $delimiter
* @return \Magento\Framework\File\Csv
*/
public function setDelimiter($delimiter)
{
$this->_delimiter = $delimiter;
return $this;
}

/**
* Set CSV column value enclosure
*
* @param string $enclosure
* @return \Magento\Framework\File\Csv
*/
public function setEnclosure($enclosure)
{
$this->_enclosure = $enclosure;
return $this;
}

/**
* Retrieve CSV file data as array
*
* @param string $file
* @return array
* @throws \Exception
*/
public function getData($file)
{
$data = [];
if (!file_exists($file)) {
throw new \Exception('File "' . $file . '" does not exist');
}

$fh = fopen($file, 'r');
while ($rowData = fgetcsv($fh, $this->_lineLength, $this->_delimiter, $this->_enclosure)) {
$data[] = $rowData;
}
fclose($fh);
return $data;
}

/**
* Retrieve CSV file data as pairs
*
* @param string $file
* @param int $keyIndex
* @param int $valueIndex
* @return array
*/
public function getDataPairs($file, $keyIndex = 0, $valueIndex = 1)
{
$data = [];
$csvData = $this->getData($file);
foreach ($csvData as $rowData) {
if (isset($rowData[$keyIndex])) {
$data[$rowData[$keyIndex]] = isset($rowData[$valueIndex]) ? $rowData[$valueIndex] : null;
}
}
return $data;
}

/**
* Saving data row array into file
*
* @param string $file
* @param array $data
* @return $this
* @throws \Magento\Framework\Exception\FileSystemException
* @deprecated 102.0.0
* @see appendData
*/
public function saveData($file, $data)
{
return $this->appendData($file, $data, 'w');
}

/**
* Replace the saveData method by allowing to select the input mode
*
* @param string $file
* @param array $data
* @param string $mode
*
* @return $this
*
* @throws \Magento\Framework\Exception\FileSystemException
*/
public function appendData($file, $data, $mode = 'w')
{
$fileHandler = fopen($file, $mode);
foreach ($data as $dataRow) {
$this->file->filePutCsv($fileHandler, $dataRow, $this->_delimiter, $this->_enclosure);
}
fclose($fileHandler);

return $this;
}
}