File modules/cms/macros/macro/RSSReader.class.php

Last commit: Sun Feb 23 04:49:34 2020 +0100	Jan Dankert	Refactoring with Namespaces for the cms modules, part 2.


     1 <?php
     2 namespace cms\macros\macro;
     3 // ---------------------------------------------------------------------------
     4 // $Id$
     5 // ---------------------------------------------------------------------------
     6 // OpenRat Content Management System
     7 // Copyright (C) 2002 Jan Dankert, jandankert@jandankert.de
     8 //
     9 // This program is free software; you can redistribute it and/or
    10 // modify it under the terms of the GNU General Public License
    11 // as published by the Free Software Foundation; either version 2
    12 // of the License, or (at your option) any later version.
    13 //
    14 // This program is distributed in the hope that it will be useful,
    15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17 // GNU General Public License for more details.
    18 //
    19 // You should have received a copy of the GNU General Public License
    20 // along with this program; if not, write to the Free Software
    21 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    22 // ---------------------------------------------------------------------------
    23 // $Log$
    24 // Revision 1.2  2004-12-19 15:18:50  dankert
    25 // Speichern des RSS-Feeds in Session (Performance)
    26 //
    27 // Revision 1.1  2004/10/14 21:15:13  dankert
    28 // Lesen eines RSS-Feeds und erzeugen eines HTML-Abschnittes dafuer
    29 //
    30 // ---------------------------------------------------------------------------
    31 use util\Macro;
    32 
    33 
    34 /**
    35  * @author Jan Dankert
    36  */
    37 class RSSReader extends Macro
    38 {
    39 	/**
    40 	 * Bitte immer alle Parameter in dieses Array schreiben, dies ist fuer den Web-Developer hilfreich.
    41 	 * @type String
    42 	 */
    43 	var $parameters  = Array(
    44 		'url'=>'URL from which the RSS is fetched'
    45 		);
    46 
    47 	/**
    48 	 * Bitte immer eine Beschreibung benutzen, dies ist fuer den Web-Developer hilfreich.
    49 	 * @type String
    50 	 */
    51 	var $description = 'Reads a RSS-Feed and displays its content as a html list';
    52 
    53 	var $url       = 'http://www.heise.de/newsticker/heise.rdf';
    54 
    55 
    56 
    57 	function execute()
    58 	{
    59 	    // TODO: Caching of macro output should be done by the CMS.
    60 
    61         // Sessionvariable mit CRC verschluesseln, falls es mehrere RSS-Feeds im Projekt gibt
    62 		$sessVar = 'RSSReader_'.crc32($this->url);
    63 		$cache = $this->getSessionVar( $sessVar );
    64 		
    65 		if	( !empty($cache) )
    66 		{
    67 			// Wenn Cache vorhanden, dann diesen ausgeben
    68 			$this->output( $cache );
    69 		}
    70 		else
    71 		{
    72 			// Wenn Cache leer, dann RSS erzeugen und in Session speichern
    73 
    74             ob_start();
    75             $this->create();
    76 
    77             $output = ob_get_contents();
    78             ob_end_clean();
    79 
    80             $this->setSessionVar( $sessVar,$output );
    81             echo $output;
    82 		} 
    83 	}
    84 
    85 
    86 
    87 	// Erzeugt den Text des RSS-Feeds
    88 	function create()
    89 	{
    90 		$rss = $this->parse( implode('',file($this->url)) );
    91 		$out = array();
    92 		
    93 		$this->output('<ul>');
    94 
    95 		// Schleife ueber alle Inhalte des RSS-Feeds
    96 		foreach( $rss['items'] as $item )
    97 		{
    98 			$this->output('<li>');
    99 			$this->output('<a href="'.$item['link'].'">'.$item['title'].'</a><br/>'.$item['description']);
   100 			$this->output('</li>');
   101 		}
   102 
   103 		$this->output('</ul>');
   104 	}
   105 
   106 
   107 
   108 	function parse( $feed )
   109 	{
   110 		// Parses the RSS feed into the array
   111 		$arr = array();
   112 		// Determine encoding
   113 		preg_match('/<\?xml version="1\.0" encoding="(.*)"\?>/i', $feed, $sarr);
   114 		if	( !empty($sarr[1]))
   115 			$arr["encoding"] = $sarr[1];
   116 		// Determine title
   117 		preg_match('/<title>(.*)<\/title>/i', $feed, $sarr);
   118 		if	( !empty($sarr[1]))
   119 			$arr["title"] = $sarr[1];
   120 		// Determine title
   121 		preg_match('/<title>(.*)<\/title>/i', $feed, $sarr);
   122 		if	( !empty($sarr[1]))
   123 			$arr["title"] = $sarr[1];
   124 		// Determine description
   125 		preg_match('/<description>(.*)<\/description>/i', $feed, $sarr);
   126 		if	( !empty($sarr[1]))
   127 			$arr["description"] = $sarr[1];
   128 		// Determine link
   129 		preg_match('/<link>(.*)<\/link>/i', $feed, $sarr);
   130 		if	( !empty($sarr[1]))
   131 			$arr["link"] = $sarr[1];
   132 		// Determine language
   133 		preg_match('/<language>(.*)<\/language>/i', $feed, $sarr);
   134 		if	( !empty($sarr[1]))
   135 			$arr["language"] = $sarr[1];
   136 		// Determine generator
   137 		preg_match('/<generator>(.*)<\/generator>/i', $feed, $sarr);
   138 		if	( !empty($sarr[1]))
   139 			$arr["generator"] = $sarr[1];
   140 		// Strip items
   141 		$parts = explode("<item>", $feed);
   142 		$items = array();
   143 		foreach($parts as $part)
   144 		{
   145 			$item = substr($part, 0, strpos($part, "</item>"));
   146 			if	( !empty($item) )
   147 				$items[] = $item;
   148 		}
   149 		// Fill the channel array
   150 		$arr["items"] = array();
   151 		foreach($items as $item)
   152 		{
   153 			$i = array();
   154 			
   155 			// Determine title
   156 			preg_match('/<title>(.*)<\/title>/i', $item, $title);
   157 			if	( !empty($title[1]))
   158 				$i['title'] = $title[1];
   159 			else
   160 				$i['title'] = '';
   161 
   162 			// Determine pubdate
   163 			preg_match('/<pubDate>(.*)<\/pubDate>/i', $item, $pubdate);
   164 			if	( !empty($pubdate[1]))
   165 				$i['pubDate'] = strtotime($pubdate[1]);
   166 			else
   167 				$i['pubDate'] = '';
   168 
   169 			// Determine link
   170 			preg_match('/<link>(.*)<\/link>/i', $item, $link);
   171 			if	( !empty($link[1]))
   172 				$i['link'] = $link[1];
   173 			else
   174 				$i['link'] = '';
   175 
   176 			// Determine description
   177 			if(stristr($item, '<![CDATA['))
   178 				preg_match('/<description><!\[CDATA\[(.*)\]\]><\/description>/is', $item, $description);
   179 			else
   180 				preg_match('/<description>(.*)<\/description>/is', $item, $description);
   181 
   182 			if	( !empty($description[1]))
   183 				$i['description'] = $description[1];
   184 			else
   185 				$i['description'] = '';
   186 
   187 			$arr["items"][] = $i;
   188 		}
   189 		return $arr;
   190 	}
   191 }



Download modules/cms/macros/macro/RSSReader.class.php


History
Sun, 23 Feb 2020 04:49:34 +0100	Jan Dankert	Refactoring with Namespaces for the cms modules, part 2.
Sun, 23 Feb 2020 04:01:30 +0100	Jan Dankert	Refactoring with Namespaces for the cms modules, part 1: moving.