From 361c83706363c10685dd4baccd24164886094994 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@users.mediawiki.org>
Date: Fri, 5 Mar 2004 10:16:46 +0000
Subject: [PATCH] New RSS feed should be easier to integrate with any
 QueryPage. Sample for Newpages.

---
 includes/Feed.php            | 86 ++++++++++++++++++++++++++++++++++++
 includes/QueryPage.php       | 79 ++++++++++++++++++++++++++++++++-
 includes/SpecialNewpages.php |  7 ++-
 3 files changed, 169 insertions(+), 3 deletions(-)
 create mode 100644 includes/Feed.php

diff --git a/includes/Feed.php b/includes/Feed.php
new file mode 100644
index 0000000000..e5c7c18bc1
--- /dev/null
+++ b/includes/Feed.php
@@ -0,0 +1,86 @@
+<?php
+
+$wgFeedClasses = array(
+	"rss" => "RSSFeed",
+	# "atom" => "AtomFeed",
+	);
+
+class FeedItem {
+	var $Title = "Wiki";
+	var $Description = "";
+	var $Url = "";
+	
+	function FeedItem( $Title, $Description, $Url ) {
+		$this->Title = $Title;
+		$this->Description = $Description;
+		$this->Url = $Url;
+	}
+	
+	/* Static... */
+	function xmlEncode( $string ) {
+		global $wgInputEncoding, $wgLang;
+		$string = str_replace( "\r\n", "\n", $string );
+		if( strcasecmp( $wgInputEncoding, "utf-8" ) != 0 ) {
+			$string = $wgLang->iconv( $wgInputEncoding, "utf-8" );
+		}
+		return htmlspecialchars( $string );
+	}
+	function getTitle() {
+		return $this->xmlEncode( $this->Title );
+	}
+	function getUrl() {
+		return $this->xmlEncode( $this->Url );
+	}
+	function getDescription() {
+		return $this->xmlEncode( $this->Description );
+	}
+	function getLanguage() {
+		global $wgLanguageCode;
+		return $wgLanguageCode;
+	}
+}
+
+class ChannelFeed extends FeedItem {
+	/* Abstract functions, override! */
+	function outHeader() {
+		# print "<feed>";
+	}
+	function outItem( $item ) {
+		# print "<item>...</item>";
+	}
+	function outFooter() {
+		# print "</feed>";
+	}
+}
+
+class RSSFeed extends ChannelFeed {
+	function outHeader() {
+		print '<' . '?xml version="1.0" encoding="utf-8"?' . ">\n";
+		?><!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN" "http://my.netscape.com/publish/formats/rss-0.91.dtd">
+<rss version="0.91">
+	<channel>
+		<title><?php print $this->getTitle() ?></title>
+		<link><?php print $this->getUrl() ?></link>
+		<description><?php print $this->getDescription() ?></description>
+		<language><?php print $this->getLanguage() ?></language>
+<?php
+	}
+	
+	function outItem( $item ) {
+	?>
+		<item>
+			<title><?php print $item->getTitle() ?></title>
+			<link><?php print $item->getUrl() ?></link>
+			<description><?php print $item->getDescription() ?></description>
+		</item>
+<?php
+	}
+
+	function outFooter() {
+	?>
+	</channel>
+</rss><?php
+	}
+}
+
+?>
\ No newline at end of file
diff --git a/includes/QueryPage.php b/includes/QueryPage.php
index ea87c26b3d..d19390f6bc 100644
--- a/includes/QueryPage.php
+++ b/includes/QueryPage.php
@@ -1,6 +1,7 @@
 <?php
 
 include_once ( "LogPage.php" ) ;
+include_once ( "Feed.php" );
 
 # This is a class for doing query pages; since they're almost all the same,
 # we factor out some of the functionality into a superclass, and let
@@ -36,7 +37,7 @@ class QueryPage {
 	function formatResult( $skin, $result ) {
 		return "";
 	}
-
+	
 	# This is the actual workhorse. It does everything needed to make a
 	# real, honest-to-gosh query page.
 
@@ -87,6 +88,82 @@ class QueryPage {
 			$logpage->replaceContent( $s );
 		}
 	}
+	
+	# Similar to above, but packaging in a syndicated feed instead of a web page
+	function doFeed( $class = "" ) {
+		global $wgFeedClasses;
+		global $wgOut, $wgLanguageCode, $wgLang;
+		if( $class == "rss" ) {
+			$wgOut->disable();
+			
+			$feed = new RSSFeed(
+				$this->feedTitle(),
+				$this->feedDesc(),
+				$this->feedUrl() );
+			$feed->outHeader();
+			
+			$sql = $this->getSQL( 0, 50 );
+			$res = wfQuery( $sql, DB_READ, "QueryPage::doFeed" );
+			while( $obj = wfFetchObject( $res ) ) {
+				$item = $this->feedResult( $obj );
+				if( $item ) $feed->outItem( $item );
+			}
+			wfFreeResult( $res );
+
+			$feed->outFooter();
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	# Override for custom handling. If the titles/links are ok, just do feedItemDesc()
+	function feedResult( $result ) {
+		if( isset( $result->cur_title ) ) {
+			$title = Title::MakeTitle( $result->cur_namespace, $result->cur_title );
+		} elseif( isset( $result->old_title ) ) {
+			$title = Title::MakeTitle( $result->old_namespace, $result->old_title );
+		} elseif( isset( $result->rc_title ) ) {
+			$title = Title::MakeTitle( $result->rc_namespace, $result->rc_title );
+		} else {
+			return NULL;
+		}
+		if( $title ) {
+			return new FeedItem(
+				$title->getText(),
+				$this->feedItemDesc( $result ),
+				wfFullUrl( $title->getUrl() ) );
+		} else {
+			return NULL;
+		}
+	}
+	
+	function feedItemDesc( $row ) {
+		if( isset( $row->cur_comment ) ) {
+			return $row->cur_comment;
+		} elseif( isset( $row->old_comment ) ) {
+			return $row->old_comment;
+		} elseif( isset( $row->rc_comment ) ) {
+			return $row->rc_comment;
+		}
+		return "";
+	}
+
+	function feedTitle() {
+		global $wgLanguageCode, $wgSitename, $wgLang;
+		$pages = $wgLang->getValidSpecialPages();
+		$title = $pages[$this->getName()];
+		return "$title - $wgSitename [$wgLanguageCode]";
+	}
+	
+	function feedDesc() {
+		return wfMsg( "fromwikipedia" );
+	}
+	
+	function feedUrl() {
+		global $wgLang;
+		return wfFullUrl( $wgLang->SpecialPage( $this->getName() ) );
+	}
 }
 
 # This is a subclass for very simple queries that are just looking for page
diff --git a/includes/SpecialNewpages.php b/includes/SpecialNewpages.php
index baf504d998..ecd0e62eda 100644
--- a/includes/SpecialNewpages.php
+++ b/includes/SpecialNewpages.php
@@ -7,7 +7,7 @@ class NewPagesPage extends QueryPage {
 	function getName() {
 		return "Newpages";
 	}
-
+	
 	function isExpensive() {
 		return parent::isExpensive();
 	}
@@ -54,7 +54,10 @@ function wfSpecialNewpages()
     
     $npp = new NewPagesPage();
     
-    $npp->doQuery( $offset, $limit );
+
+    if( !$npp->doFeed( $_GET["feed"] ) ) {
+	    $npp->doQuery( $offset, $limit );
+	}
 }
 
 ?>
-- 
2.20.1