<?php

/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Composer\Package\Comparer;

/**
* class Comparer
*
* @author Hector Prats <hectorpratsortega@gmail.com>
*/
class Comparer
{
private $source;
private $update;
private $changed;

public function setSource($source)
{
$this->source = $source;
}

public function setUpdate($update)
{
$this->update = $update;
}

public function getChanged($toString = false, $explicated = false)
{
$changed = $this->changed;
if (!count($changed)) {
return false;
}
if ($explicated) {
foreach ($changed as $sectionKey => $itemSection) {
foreach ($itemSection as $itemKey => $item) {
$changed[$sectionKey][$itemKey] = $item.' ('.$sectionKey.')';
}
}
}

if ($toString) {
foreach ($changed as $sectionKey => $itemSection) {
foreach ($itemSection as $itemKey => $item) {
$changed['string'][] = $item."\r\n";
}
}
$changed = implode("\r\n", $changed['string']);
}

return $changed;
}

public function doCompare()
{
$source = array();
$destination = array();
$this->changed = array();
$currentDirectory = getcwd();
chdir($this->source);
$source = $this->doTree('.', $source);
if (!is_array($source)) {
return;
}
chdir($currentDirectory);
chdir($this->update);
$destination = $this->doTree('.', $destination);
if (!is_array($destination)) {
exit;
}
chdir($currentDirectory);
foreach ($source as $dir => $value) {
foreach ($value as $file => $hash) {
if (isset($destination[$dir][$file])) {
if ($hash !== $destination[$dir][$file]) {
$this->changed['changed'][] = $dir.'/'.$file;
}
} else {
$this->changed['removed'][] = $dir.'/'.$file;
}
}
}
foreach ($destination as $dir => $value) {
foreach ($value as $file => $hash) {
if (!isset($source[$dir][$file])) {
$this->changed['added'][] = $dir.'/'.$file;
}
}
}
}

private function doTree($dir, &$array)
{
if ($dh = opendir($dir)) {
while ($file = readdir($dh)) {
if ($file !== '.' && $file !== '..') {
if (is_link($dir.'/'.$file)) {
$array[$dir][$file] = readlink($dir.'/'.$file);
} elseif (is_dir($dir.'/'.$file)) {
if (!count($array)) {
$array[0] = 'Temp';
}
if (!$this->doTree($dir.'/'.$file, $array)) {
return false;
}
} elseif (is_file($dir.'/'.$file) && filesize($dir.'/'.$file)) {
set_time_limit(30);
$array[$dir][$file] = md5_file($dir.'/'.$file);
}
}
}
if (count($array) > 1 && isset($array['0'])) {
unset($array['0']);
}

return $array;
}

return false;
}
}