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<?php
/**
* Copyright © 2004 Brion Vibber <brion@pobox.com>
* https://www.mediawiki.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Generate an Atom feed.
*
* @ingroup Feed
*/
class AtomFeed extends ChannelFeed {
/**
* Format a date given timestamp, if one is given.
*
* @param string|int|null $timestamp
* @return string|null
*/
function formatTime( $timestamp ) {
if ( $timestamp ) {
// need to use RFC 822 time format at least for rss2.0
return gmdate( 'Y-m-d\TH:i:s', wfTimestamp( TS_UNIX, $timestamp ) );
}
}
/**
* Outputs a basic header for Atom 1.0 feeds.
*/
function outHeader() {
global $wgVersion;
$this->outXmlHeader();
// Manually escaping rather than letting Mustache do it because Mustache
// uses htmlentities, which does not work with XML
$templateParams = [
'language' => $this->xmlEncode( $this->getLanguage() ),
'feedID' => $this->getFeedId(),
'title' => $this->getTitle(),
'url' => $this->xmlEncode( wfExpandUrl( $this->getUrlUnescaped(), PROTO_CURRENT ) ),
'selfUrl' => $this->getSelfUrl(),
'timestamp' => $this->xmlEncode( $this->formatTime( wfTimestampNow() ) ),
'description' => $this->getDescription(),
'version' => $this->xmlEncode( $wgVersion ),
];
print $this->templateParser->processTemplate( 'AtomHeader', $templateParams );
}
/**
* Atom 1.0 requires a unique, opaque IRI as a unique identifier
* for every feed we create. For now just use the URL, but who
* can tell if that's right? If we put options on the feed, do we
* have to change the id? Maybe? Maybe not.
*
* @return string
*/
private function getFeedId() {
return $this->getSelfUrl();
}
/**
* Atom 1.0 requests a self-reference to the feed.
* @return string
*/
private function getSelfUrl() {
global $wgRequest;
return htmlspecialchars( $wgRequest->getFullRequestURL() );
}
/**
* Output a given item.
* @param FeedItem $item
*/
function outItem( $item ) {
global $wgMimeType;
// Manually escaping rather than letting Mustache do it because Mustache
// uses htmlentities, which does not work with XML
$templateParams = [
"uniqueID" => $item->getUniqueID(),
"title" => $item->getTitle(),
"mimeType" => $this->xmlEncode( $wgMimeType ),
"url" => $this->xmlEncode( wfExpandUrl( $item->getUrlUnescaped(), PROTO_CURRENT ) ),
"date" => $this->xmlEncode( $this->formatTime( $item->getDate() ) ),
"description" => $item->getDescription(),
"author" => $item->getAuthor()
];
print $this->templateParser->processTemplate( 'AtomItem', $templateParams );
}
/**
* Outputs the footer for Atom 1.0 feed (basically '\</feed\>').
*/
function outFooter() {
print "</feed>";
}
}
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