Current File : /www/varak.net/paste.varak.net-5.6/app/lib/PHPDiff.php
<?php namespace StickyNotes;
/**
* Sticky Notes
*
* An open source lightweight pastebin application
*
* @package StickyNotes
* @author Sayak Banerjee
* @copyright (c) 2014 Sayak Banerjee <mail@sayakbanerjee.com>
* @license http://www.opensource.org/licenses/bsd-license.php
* @link http://sayakbanerjee.com/sticky-notes
* @since Version 1.0
* @filesource
*/
use App;
use Diff;
use DiffRenderer;
use Lang;
use Paste;
use Revision;
/**
* PHPDiff class
*
* Provides methods to generate a diff
*
* @package StickyNotes
* @subpackage Libraries
* @author Sayak Banerjee
*/
class PHPDiff {
/**
* Stores a class instance
*
* @var PHPDiff
*/
private static $instance;
/**
* The diff renderer instance
*
* @var Diff_Renderer_Html_SideBySid
*/
private $renderer;
/**
* Creates a new instance of PHPass
*
* @return void
*/
public function __construct()
{
require_once base_path().'/vendor/phpdiff/Diff.php';
require_once base_path().'/vendor/phpdiff/Diff/Renderer/Html/SideBySide.php';
$this->renderer = new DiffRenderer;
}
/**
* Returns a new instance of Crypt class
*
* @static
* @return PHPass
*/
public static function make()
{
if ( ! isset(static::$instance))
{
static::$instance = new PHPDiff();
}
return static::$instance;
}
/**
* Generates a diff between two pastes
*
* @param string $oldKey
* @param string $newKey
* @return string
*/
public function compare($oldKey, $newKey)
{
$oldPaste = Paste::where('urlkey', $oldKey)->first();
$newPaste = Paste::where('urlkey', $newKey)->first();
// Both pastes need to be valid
if (is_null($oldPaste) OR is_null($newPaste))
{
App::abort(404); // Not found
}
// We check that the new paste is actually a revision of the old
// paste
$revision = Revision::where('paste_id', $newPaste->id)->where('urlkey', $oldPaste->urlkey);
if ($revision->count() == 0)
{
App::abort(404); // Not found
}
// The php-diff library expects an array as an input
// for each of the texts. Each array elementb will represent a
// line in the text block
$left = explode("\n", $oldPaste->data);
$right = explode("\n", $newPaste->data);
// We set these options so that the headers of the diff
// table are more informative
$options = array(
'oldHead' => sprintf(Lang::get('show.old_rev'), link_to($oldKey, '#'.$oldKey)),
'newHead' => sprintf(Lang::get('show.new_rev'), link_to($newKey, '#'.$newKey)),
);
// Create a new diff instance
$diff = new Diff($left, $right, $options);
// Render using the sideBySide renderer and return the html
return $diff->Render($this->renderer);
}
}
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