# 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
    00015     final class RssChannelWorker extends Singleton implements FeedChannelWorker
    00016     {
    00020         public static function me()
    00021         {
    00022             return Singleton::getInstance(__CLASS__);
    00023         }
    00024
    00028         public function makeChannel(SimpleXMLElement $xmlFeed)
    00029         {
    00030             if (
    00031                 (!isset($xmlFeed->channel))
    00032                 || (!isset($xmlFeed->channel->title))
    00033             )
    00034                 throw new WrongStateException(
    00035                     'there are no channels in given rss'
    00036                 );
    00037
    00038             $feedChannel =
    00039                 FeedChannel::create((string) $xmlFeed->channel->title);
    00040
    00041             if (isset($xmlFeed->channel->link))
    00042                 $feedChannel->setLink((string) $xmlFeed->channel->link);
    00043
    00044             return $feedChannel;
    00045         }
    00046
    00047         public function toXml(FeedChannel $channel, $itemsXml)
    00048         {
    00049             return
    00050                 '<rss version="'.RssFeedFormat::VERSION.'">'
    00051                     .'<channel>'
    00052                         .'<title>'.$channel->getTitle().'</title>'
    00053                         .(
    00054                             $channel->getLink()
    00055                                 ? '<link>'.$channel->getLink().'</link>'
    00056                                 : null
    00057                         )
    00058                         .(
    00059                             $channel->getDescription()
    00060                                 ?
    00061                                     '<description>'
    00062                                     .$channel->getDescription()
    00063                                     .'</description>'
    00064                                 : null
    00065                         )
    00066                         .$itemsXml
    00067                     .'</channel>'
    00068                 .'</rss>';
    00069         }
    00070     }
    00071 ?>