<?php

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/*

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* This file is part of the ManageWP Worker plugin.

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*

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* (c) ManageWP LLC <contact@managewp.com>

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*

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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*/

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class MWP_IncrementalBackup_FileReader

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{

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/**

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* @var int

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*/

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private $chunkByteSize = 4096;

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/**

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* @return int

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*/

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public function getChunkByteSize()

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{

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return $this->chunkByteSize;

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}

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/**

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* @param int $chunkByteSize

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*/

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public function setChunkByteSize($chunkByteSize)

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{

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$this->chunkByteSize = $chunkByteSize;

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}

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/**

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*

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*

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* @param string $realPath

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* @param int $offset

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* @param int $limit

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*

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* @return mixed

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*/

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public function readFileContents($realPath, $offset = 0, $limit = 0)

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{

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if (!file_exists($realPath)) {

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return null;

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}

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$handle = fopen($realPath, "rb");

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if (!$handle) {

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return null;

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}

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$contentLength = 0;

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$buffer = '';

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if ($limit === 0) {

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$limit = filesize($realPath) - $offset;

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}

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if ($offset !== 0) {

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fseek($handle, $offset);

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}

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while ($limit > 0) {

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$chunkSize = $limit > $this->chunkByteSize ? $this->chunkByteSize : $limit;

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$limit = $limit - $chunkSize;

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$contentLength = $contentLength + $chunkSize;

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$contents = fread($handle, $chunkSize);

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$buffer = $buffer.$contents;

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}

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fclose($handle);

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return array($buffer, $contentLength);

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}

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}

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