plugins/SpecialRSS.php
author Dan
Tue, 29 Jul 2008 06:46:27 -0600
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A few bugfixes and updates. The most recent fix involves $desc being undefined in the add_channel method.
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<?php
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/*
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Plugin Name: RSS Frontend
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Plugin URI: http://enanocms.org/Feed_me
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Description: Provides the page Special:RSS, which is used to generate RSS feeds of site and page content changes.
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Author: Dan Fuhry
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Version: 1.0
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Author URI: http://enanocms.org/
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*/
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Version 1.0 release candidate 2
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 * Copyright (C) 2006-2007 Dan Fuhry
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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global $db, $session, $paths, $template, $plugins; // Common objects
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$plugins->attachHook('base_classes_initted', '
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  $paths->add_page(Array(
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    \'name\'=>\'RSS Feed - Latest changes\',
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    \'urlname\'=>\'RSS\',
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    \'namespace\'=>\'Special\',
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    \'special\'=>0,\'visible\'=>0,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\',
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    ));
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  ');
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$plugins->attachHook('session_started', '__enanoRSSAttachHTMLHeaders();');
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function __enanoRSSAttachHTMLHeaders()
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{
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  global $db, $session, $paths, $template, $plugins; // Common objects
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  $template->add_header('<link rel="alternate" title="'.getConfig('site_name').' Changes feed" href="'.makeUrlNS('Special', 'RSS/recent', null, true).'" type="application/rss+xml" />');
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  $template->add_header('<link rel="alternate" title="'.getConfig('site_name').' Comments feed" href="'.makeUrlNS('Special', 'RSS/comments', null, true).'" type="application/rss+xml" />');
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}
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define('ENANO_FEEDBURNER_INCLUDED', true);
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/**
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 * Class for easily generating RSS feeds.
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 * @package Enano
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 * @subpackage Feed Me
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 * @license GNU General Public License <http://www.gnu.org/licenses/gpl.html>
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 */
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class RSS
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{
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  /**
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   * List of channels contained in this feed.
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   * @var array
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   */
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  var $channels = Array();
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  /**
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   * The channel that's currently being operated on
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   * @var array
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   */
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  var $this_channel = Array();
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  /**
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   * GUID of the current channel
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   * @var string
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   */
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  var $this_guid = '';
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  /**
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   * List of fully XML-formatted feed entries.
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   * @var array
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   */
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  var $items = Array();
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  /**
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   * Constructor.
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   * @param string Feed title
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   * @param string Feed description
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   * @param string Linkback
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   * @param string Generator
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   * @param string E-mail of webmaster
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   */
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  function __construct($title = false, $desc = false, $link = false, $gen = false, $email = false)
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  {
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    $this->create_channel($title, $desc, $link, $gen, $email);
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  }
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  /**
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   * PHP 4 constructor.
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   */
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  function RSS($title = false, $desc = false, $link = false, $gen = false, $email = false)
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  {
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    $this->__construct($title, $desc, $link, $gen, $email);
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  }
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  /** 
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   * Creates a new channel.
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   */
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  function create_channel($title = false, $desc = false, $link = false, $gen = false, $email = false)
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  {
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    if ( empty($title) )
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      $title = 'Untitled feed';
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    else
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      $title = htmlspecialchars($title);
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    if ( empty($desc) )
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      $desc = 'Test feed';
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    else
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      $desc = htmlspecialchars($desc);
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    if ( empty($link) )
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      $link = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . scriptPath . '/';
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    else
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      $link = htmlspecialchars($link);
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    if ( !empty($gen) )
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      $gen = htmlspecialchars($gen);
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    else
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      $gen = 'Enano CMS ' . enano_version();
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    if ( !empty($email) )
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      $email = htmlspecialchars($email);
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    else
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      $email = getConfig('contact_email');
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    $this->channels = Array();
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    $guid = md5(microtime() . mt_rand());
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    $this->channels[$guid] = Array(
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        'title' => $title,
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        'desc' => $desc,
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        'link' => $link,
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        'gen' => $gen,
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        'email' => $email,
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        'lang' => 'en-us',
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        'items' => Array()
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      );
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    $this->this_channel =& $this->channels[$guid];
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    $this->this_guid = $guid;
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    return $guid;
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  }
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  /**
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   * Selects a specific channel to add items to
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   * @param string The GUID of the channel
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   */
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  function select_channel($guid)
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  {
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    if ( isset($this->channels[$guid]) )
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    {
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      $this->this_channel =& $this->channels[$guid];
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      $this->guid = $guid;
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    }
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  }
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  /**
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   * Adds a news item.
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   * @param string Title of the feed entry
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   * @param string Link to where more information can be found
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   * @param string Short description or content area
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   * @param string Date the item was published. If this is a UNIX timestamp it will be formatted with date().
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   * @param string A Globally-Unique Identifier (GUID) for this item. Doesn't have to be a 128-bit hash - usually it's a link. If one is not provided, one is generated based on the first three parameters.
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   */
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  function add_item($title, $link, $desc, $pubdate, $guid = false)
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  {
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    $title = htmlspecialchars($title);
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    $link = htmlspecialchars($link);
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    $desc = '<![CDATA[ ' . str_replace(']]>', ']]&gt;', $desc) . ']]>';
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    if ( is_int($pubdate) || ( !is_int($pub_date) && preg_match('/^([0-9]+)$/', $pubdate) ) )
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    {
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      $pubdate = date('D, d M Y H:i:s T', intval($pubdate));
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    }
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    if ( !$guid )
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    {
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      $guid = md5 ( $title . $link . $desc . $pubdate );
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      $sec1 = substr($guid, 0, 8);
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      $sec2 = substr($guid, 8, 4);
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      $sec3 = substr($guid, 12, 4);
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      $sec4 = substr($guid, 16, 4);
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      $sec5 = substr($guid, 20, 12);
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      $guid = sprintf('%s-%s-%s-%s-%s', $sec1, $sec2, $sec3, $sec4, $sec5);
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    }
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    $xml = "    <item>
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      <title>$title</title>
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      <link>$link</link>
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      <description>
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        $desc
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      </description>
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      <pubDate>$pubdate</pubDate>
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      <guid>$guid</guid>
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    </item>";
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    $this->this_channel['items'][] = $xml;
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  }
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  /**
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   * Converts everything into the final RSS feed.
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   * @param bool If true, XML headers ("<?xml version="1.0" encoding="utf-8" ?>") are included. Defaults to true.
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   * @return string
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   */
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  function render($headers = true)
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  {
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    $xml = '';
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    if ( $headers )
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      // The weird quotes are because of a jEdit syntax highlighting bug
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      $xml .= "<?xml version=".'"'."1.0".'"'." encoding=".'"'."utf-8".'"'." ?>\n";
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    $xml .= "<rss version=".'"'."2.0".'"'.">\n";
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    foreach ( $this->channels as $channel )
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    {
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      $xml .= "  <channel>
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    <title>{$channel['title']}</title>
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    <link>{$channel['link']}</link>
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    <description>{$channel['desc']}</description>
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    <generator>{$channel['gen']}</generator>
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    <webMaster>{$channel['email']}</webMaster>
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    <language>{$channel['lang']}</language>
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";
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      $content = implode("\n", $channel['items']) . "\n";
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      $xml .= $content;
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      $xml .= "  </channel>";
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      $xml .= "
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</rss>";
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    }
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    return $xml;
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  }
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}
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// function names are IMPORTANT!!! The name pattern is: page_<namespace ID>_<page URLname, without namespace>
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1
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function page_Special_RSS()
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{
0
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  global $db, $session, $paths, $template, $plugins; // Common objects
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  header('Content-type: text/xml; charset=windows-1252'); //application/rss+xml');
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  global $aggressive_optimize_html;
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  $aggressive_optimize_html = false;
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  $session->sid_super = false;
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  if ( $session->auth_level > USER_LEVEL_MEMBER )
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    $session->auth_level = USER_LEVEL_MEMBER;
0
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  $mode = $paths->getParam(0);
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  $n = $paths->getParam(1);
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  if(!preg_match('#^([0-9]+)$#', $n) || (int)$n > 50) $n = 20;
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  else $n = (int)$n;
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  switch($mode)
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  {
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    case "recent":
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      $title = getConfig('site_name') . ' Recent Changes';
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      $desc = getConfig('site_desc');
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      $rss = new RSS($title, $desc);
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      $q = $db->sql_query('SELECT * FROM '.table_prefix.'logs WHERE log_type=\'page\' ORDER BY time_id DESC LIMIT '.$n.';');
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      if(!$q)
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      {
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        $rss->add_item('ERROR', '', 'Error selecting log data: ' . mysql_error() . '', time());
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      }
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      else
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      {
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        while($row = $db->fetchrow())
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        {
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          $link = makeUrlComplete($row['namespace'], $row['page_id'], "oldid={$row['time_id']}"); // makeUrlComplete($row['namespace'], $row['page_id']);
0
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          $title = $paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]['name'];
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          $desc = "Change by {$row['author']}:<br />";
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          $desc .= ( $row['edit_summary'] != '' ) ? $row['edit_summary'] : 'No edit summary given.';
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          $date = $row['time_id'];
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          $guid = false;
0
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          $rss->add_item($title, $link, $desc, $date, $guid);
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        }
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      }
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      echo $rss->render();
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      break;
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    case "comments":
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      $title = getConfig('site_name') . ' Latest Comments';
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      $desc = getConfig('site_desc');
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      $rss = new RSS($title, $desc);
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      $q = $db->sql_query('SELECT * FROM '.table_prefix.'comments ORDER BY time DESC LIMIT '.$n.';');
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      if(!$q)
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      {
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        $rss->add_item('ERROR', '', 'Error selecting log data: ' . mysql_error() . '', time());
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      }
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      else
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      {
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        $n = $db->numrows();
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        //echo '<!-- Number of rows: '.$n.' -->'; // ."\n<!-- SQL backtrace: \n\n".$db->sql_backtrace().' -->';
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        for ( $j = 0; $j < $n; $j++ )
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        {
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          $row = $db->fetchrow($q);
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          if(!is_array($row)) die(__FILE__.':'.__LINE__.' $row is not an array');
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          $link = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']).'#comments';
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          $page = ( isset($paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]) ) ? $paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]['name'] : $paths->nslist[$row['namespace']].$row['page_id'];
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          $title = $row['subject'] . ': Posted on page "'.$page.'" by user '.$row['name'];
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          $desc = RenderMan::render($row['comment_data']);
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          $date = $row['time'];
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          $guid = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']).'?do=comments&amp;comment='.$row['time'];
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          $rss->add_item($title, $link, $desc, $date, $guid);
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        }
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      }
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      echo $rss->render();
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      break;
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   315
    default:
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      $code = $plugins->setHook('feed_me_request');
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      foreach ( $code as $cmd )
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   318
      {
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        eval($cmd);
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      }
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      break;
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   322
  }
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}
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?>