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<?php
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// $Id: revisions_rss.module,v 1.3 2009/01/21 02:49:43 alexj Exp $
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/**
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* @file
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* Revisions RSS feed generator.
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*/
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/**
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* Menu callback; publish an RSS feed
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*/
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function revisions_rss_handler(&$node) {
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if ($output = revisions_rss_node_feed($node->nid)) {
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print $output;
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return;
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}
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drupal_not_found();
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}
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/**
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* Publish a feed for all revisions of a specific node
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*
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* @return bool True if successful in generating a feed, false otherwise.
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*/
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function revisions_rss_node_feed($nid) {
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global $base_url;
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$node = node_load($nid);
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if (revision_rss_check_type($node)) {
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$items = revisions_rss_get_revisions($node->nid);
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$namespaces = array();
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$channel = array(
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'title' => t('@site - Updates for "@title"', array(
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'@site' => variable_get('site_name', 'Drupal'),
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'@title' => $node->title)),
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'description' => t('Updates for "@title"', array('@title' => $node->title)),
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'link' => url('node/{$node->nid}', array('absolute' => TRUE)),
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);
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return revisions_rss_format_feed($items, $channel, $namespaces);
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}
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else {
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return FALSE;
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}
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}
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/**
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* Format and print a revision feed.
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*
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* @param $items string The individual RSS items.
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* @param $channel array The channels present in the RSS.
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* @param $namespaces array The namespaces present in the RSS.
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*/
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function revisions_rss_format_feed($items, $channel = array(), $namespaces = array()) {
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global $base_url, $locale;
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$channel_defaults = array(
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'version' => '2.0',
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'title' => t('@site_name - Updates', array('@site_name' => variable_get('site_name', 'Drupal'))),
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'link' => $base_url,
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'description' => t('Updates'),
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'language' => $locale);
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$channel = array_merge($channel_defaults, $channel);
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$namespaces = array_merge(array('xmlns:dc="http://purl.org/dc/elements/1.1/"'), $namespaces);
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$output = '<?xml version="1.0" encoding="utf-8"?>'."\n";
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$output .= '<rss version="'. $channel['version'] .'" xml:base="'. $base_url .'" '. implode(' ', $namespaces) .">\n";
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$output .= format_rss_channel($channel['title'], $channel['link'], $channel['description'], $items, $channel['language']);
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$output .= "</rss>\n";
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drupal_set_header('Content-Type: application/rss+xml; charset=utf-8');
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return $output;
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}
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/**
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* Takes a node ID and generates the rss for that nodes revisions.
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*
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* @param $nid int The node ID of the note to generate RSS for.
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* @return The generated RSS.
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*/
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function revisions_rss_get_revisions($nid) {
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global $base_url;
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$items = '';
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$sql = "SELECT nr.nid
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, n.title
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, nr.uid
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, nr.vid
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, n.vid AS latest
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, nr.log
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, nr.timestamp
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FROM {node_revisions} nr
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INNER JOIN {node} n
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ON nr.nid = n.nid
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WHERE nr.nid = '$nid'
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ORDER BY nr.timestamp DESC";
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$nodes = db_query_range(db_rewrite_sql($sql), 0, variable_get('feed_default_items', 10));
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while ($node = db_fetch_object($nodes)) {
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$user = user_load(array('uid' => $node->uid));
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$node->name = $user->name;
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if (!empty( $node->log)) {
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$node->description = "Log: {$node->log}\n\n";
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}
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$node->description .= "Updated by: {$user->name}\n\n";
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$extra = array(
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array(
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'key' => 'pubDate',
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'value' => date('r', $node->timestamp)),
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array(
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'key' => 'dc:creator',
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'value' => $node->name),
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array(
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'key' => 'guid',
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'value' => t("Update !vid at !base/node/!nid", array('!vid' => $node->vid,
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'!base' => $base_url,
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'!nid' => $node->nid)),
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'attributes' => array('isPermaLink' => 'false'))
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);
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if (module_exists('diff') && $node->vid != $node->latest) {
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$node->description .= l("Diff vs Newest", "node/{$node->nid}/revisions/view/{$node->vid}/{$node->latest}");
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}
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$link = url("node/{$node->nid}", array('absolute' => TRUE));
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$items .= format_rss_item($node->title, $link, check_markup($node->description, $node->format, FALSE), $extra);
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}
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return $items;
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}
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Parent Directory
| 
Revision Log
| 
Revision Graph