RssChannelWorker.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2007 by Dmitry A. Lomash, Dmitry E. Demidov             *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU Lesser General Public License as        *
00007  *   published by the Free Software Foundation; either version 3 of the    *
00008  *   License, or (at your option) any later version.                       *
00009  *                                                                         *
00010  ***************************************************************************/
00011 /* $Id: RssChannelWorker.class.php 4687 2007-12-09 18:57:18Z voxus $ */
00012 
00016     final class RssChannelWorker extends Singleton implements FeedChannelWorker
00017     {
00021         public static function me()
00022         {
00023             return Singleton::getInstance(__CLASS__);
00024         }
00025         
00029         public function makeChannel(SimpleXMLElement $xmlFeed)
00030         {
00031             if (
00032                 (!isset($xmlFeed->channel))
00033                 || (!isset($xmlFeed->channel->title))
00034             )
00035                 throw new WrongStateException(
00036                     'there are no channels in given rss'
00037                 );
00038             
00039             $feedChannel =
00040                 FeedChannel::create((string) $xmlFeed->channel->title);
00041             
00042             if (isset($xmlFeed->channel->link))
00043                 $feedChannel->setLink((string) $xmlFeed->channel->link);
00044             
00045             return $feedChannel;
00046         }
00047         
00048         public function toXml(FeedChannel $channel, $itemsXml)
00049         {
00050             return
00051                 '<rss version="'.RssFeedFormat::VERSION.'">'
00052                     .'<channel>'
00053                         .'<title>'.$channel->getTitle().'</title>'
00054                         .(
00055                             $channel->getLink()
00056                                 ? '<link>'.$channel->getLink().'</link>'
00057                                 : null
00058                         )
00059                         .(
00060                             $channel->getDescription()
00061                                 ?
00062                                     '<description>'
00063                                     .$channel->getDescription()
00064                                     .'</description>'
00065                                 : null
00066                         )
00067                         .$itemsXml
00068                     .'</channel>'
00069                 .'</rss>';
00070         }
00071     }
00072 ?>

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