specialrecentchanges.php

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				> wfTimestamp( TS_UNIX, $lastmod ) ) {
			wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
			$cachedFeed = $messageMemc->get( $key );
		} else {
			wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
		}
	}
	if( is_string( $cachedFeed ) ) {
		wfDebug( "RC: Outputting cached feed\n" );
		$feed->httpHeaders();
		echo $cachedFeed;
	} else {
		wfDebug( "RC: rendering new feed and caching it\n" );
		ob_start();
		rcDoOutputFeed( $rows, $feed );
		$cachedFeed = ob_get_contents();
		ob_end_flush();

		$expire = 3600 * 24; # One day
		$messageMemc->set( $key, $cachedFeed );
		$messageMemc->set( $timekey, wfTimestamp( TS_MW ), $expire );
	}
	return true;
}

function rcDoOutputFeed( $rows, &$feed ) {
	$fname = 'rcDoOutputFeed';
	wfProfileIn( $fname );

	$feed->outHeader();

	# Merge adjacent edits by one user
	$sorted = array();
	$n = 0;
	foreach( $rows as $obj ) {
		if( $n > 0 &&
			$obj->rc_namespace >= 0 &&
			$obj->rc_cur_id == $sorted[$n-1]->rc_cur_id &&
			$obj->rc_user_text == $sorted[$n-1]->rc_user_text ) {
			$sorted[$n-1]->rc_last_oldid = $obj->rc_last_oldid;
		} else {
			$sorted[$n] = $obj;
			$n++;
		}
		$first = false;
	}

	foreach( $sorted as $obj ) {
		$title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
		$talkpage = $title->getTalkPage();
		$item = new FeedItem(
			$title->getPrefixedText(),
			rcFormatDiff( $obj ),
			$title->getFullURL(),
			$obj->rc_timestamp,
			$obj->rc_user_text,
			$talkpage->getFullURL()
			);
		$feed->outItem( $item );
	}
	$feed->outFooter();
	wfProfileOut( $fname );
}

/**
 *
 */
function rcCountLink( $lim, $d, $page='Recentchanges', $more='' ) {
	global $wgUser, $wgLang, $wgContLang;
	$sk = $wgUser->getSkin();
	$s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
	  ($lim ? $wgLang->formatNum( "{$lim}" ) : wfMsg( 'recentchangesall' ) ), "{$more}" .
	  ($d ? "days={$d}&" : '') . 'limit='.$lim );
	return $s;
}

/**
 *
 */
function rcDaysLink( $lim, $d, $page='Recentchanges', $more='' ) {
	global $wgUser, $wgLang, $wgContLang;
	$sk = $wgUser->getSkin();
	$s = $sk->makeKnownLink( $wgContLang->specialPage( $page ),
	  ($d ? $wgLang->formatNum( "{$d}" ) : wfMsg( 'recentchangesall' ) ), $more.'days='.$d .
	  ($lim ? '&limit='.$lim : '') );
	return $s;
}

/**
 * Used by Recentchangeslinked
 */
function rcDayLimitLinks( $days, $limit, $page='Recentchanges', $more='', $doall = false, $minorLink = '',
	$botLink = '', $liuLink = '', $patrLink = '', $myselfLink = '' ) {
	if ($more != '') $more .= '&';
	$cl = rcCountLink( 50, $days, $page, $more ) . ' | ' .
	  rcCountLink( 100, $days, $page, $more  ) . ' | ' .
	  rcCountLink( 250, $days, $page, $more  ) . ' | ' .
	  rcCountLink( 500, $days, $page, $more  ) .
	  ( $doall ? ( ' | ' . rcCountLink( 0, $days, $page, $more ) ) : '' );
	$dl = rcDaysLink( $limit, 1, $page, $more  ) . ' | ' .
	  rcDaysLink( $limit, 3, $page, $more  ) . ' | ' .
	  rcDaysLink( $limit, 7, $page, $more  ) . ' | ' .
	  rcDaysLink( $limit, 14, $page, $more  ) . ' | ' .
	  rcDaysLink( $limit, 30, $page, $more  ) .
	  ( $doall ? ( ' | ' . rcDaysLink( $limit, 0, $page, $more ) ) : '' );
	
	$linkParts = array( 'minorLink' => 'minor', 'botLink' => 'bots', 'liuLink' => 'liu', 'patrLink' => 'patr', 'myselfLink' => 'mine' );
	foreach( $linkParts as $linkVar => $linkMsg ) {
		if( $$linkVar != '' )
			$links[] = wfMsgHtml( 'rcshowhide' . $linkMsg, $$linkVar );
	}
	
	$shm = implode( ' | ', $links );
	$note = wfMsg( 'rclinks', $cl, $dl, $shm );
	return $note;
}


/**
 * Makes change an option link which carries all the other options
 * @param $title @see Title
 * @param $override
 * @param $options
 */
function makeOptionsLink( $title, $override, $options ) {
	global $wgUser, $wgContLang;
	$sk = $wgUser->getSkin();
	return $sk->makeKnownLink( $wgContLang->specialPage( 'Recentchanges' ),
		$title, wfArrayToCGI( $override, $options ) );
}

/**
 * Creates the options panel.
 * @param $defaults
 * @param $nondefaults
 */
function rcOptionsPanel( $defaults, $nondefaults ) {
	global $wgLang, $wgUseRCPatrol;

	$options = $nondefaults + $defaults;

	if( $options['from'] )
		$note = wfMsgExt( 'rcnotefrom', array( 'parseinline' ),
			$wgLang->formatNum( $options['limit'] ),
			$wgLang->timeanddate( $options['from'], true ) );
	else
		$note = wfMsgExt( 'rcnote', array( 'parseinline' ),
			$wgLang->formatNum( $options['limit'] ),
			$wgLang->formatNum( $options['days'] ),
			$wgLang->timeAndDate( wfTimestampNow(), true ) );

	// limit links
	$options_limit = array(50, 100, 250, 500);
	foreach( $options_limit as $value ) {
		$cl[] = makeOptionsLink( $wgLang->formatNum( $value ),
			array( 'limit' => $value ), $nondefaults) ;
	}
	$cl = implode( ' | ', $cl);

	// day links, reset 'from' to none
	$options_days = array(1, 3, 7, 14, 30);
	foreach( $options_days as $value ) {
		$dl[] = makeOptionsLink( $wgLang->formatNum( $value ),
			array( 'days' => $value, 'from' => ''  ), $nondefaults) ;
	}
	$dl = implode( ' | ', $dl);


	// show/hide links
	$showhide = array( wfMsg( 'show' ), wfMsg( 'hide' ));
	$minorLink = makeOptionsLink( $showhide[1-$options['hideminor']],
		array( 'hideminor' => 1-$options['hideminor'] ), $nondefaults);
	$botLink = makeOptionsLink( $showhide[1-$options['hidebots']],
		array( 'hidebots' => 1-$options['hidebots'] ), $nondefaults);
	$anonsLink = makeOptionsLink( $showhide[ 1 - $options['hideanons'] ],
		array( 'hideanons' => 1 - $options['hideanons'] ), $nondefaults );
	$liuLink   = makeOptionsLink( $showhide[1-$options['hideliu']],
		array( 'hideliu' => 1-$options['hideliu'] ), $nondefaults);
	$patrLink  = makeOptionsLink( $showhide[1-$options['hidepatrolled']],
		array( 'hidepatrolled' => 1-$options['hidepatrolled'] ), $nondefaults);
	$myselfLink = makeOptionsLink( $showhide[1-$options['hidemyself']],
		array( 'hidemyself' => 1-$options['hidemyself'] ), $nondefaults);
		
	$links[] = wfMsgHtml( 'rcshowhideminor', $minorLink );
	$links[] = wfMsgHtml( 'rcshowhidebots', $botLink );
	$links[] = wfMsgHtml( 'rcshowhideanons', $anonsLink );
	$links[] = wfMsgHtml( 'rcshowhideliu', $liuLink );
	if( $wgUseRCPatrol )
		$links[] = wfMsgHtml( 'rcshowhidepatr', $patrLink );
	$links[] = wfMsgHtml( 'rcshowhidemine', $myselfLink );
	$hl = implode( ' | ', $links );
		
	// show from this onward link
	$now = $wgLang->timeanddate( wfTimestampNow(), true );
	$tl =  makeOptionsLink( $now, array( 'from' => wfTimestampNow()), $nondefaults );

	$rclinks = wfMsgExt( 'rclinks', array( 'parseinline', 'replaceafter'),
		$cl, $dl, $hl );
	$rclistfrom = wfMsgExt( 'rclistfrom', array( 'parseinline', 'replaceafter'), $tl );
	return "$note<br />$rclinks<br />$rclistfrom";

}

/**
 * Creates the choose namespace selection
 *
 * @private
 *
 * @param $namespace Mixed: the key of the currently selected namespace, empty string
 *              if there is none
 * @param $invert Bool: whether to invert the namespace selection
 * @param $nondefaults Array: an array of non default options to be remembered
 * @param $categories_any Bool: Default value for the checkbox
 *
 * @return string
 */
function rcNamespaceForm( $namespace, $invert, $nondefaults, $categories_any ) {
	global $wgScript, $wgAllowCategorizedRecentChanges, $wgRequest;
	$t = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );

	$namespaceselect = HTMLnamespaceselector($namespace, '');
	$submitbutton = '<input type="submit" value="' . wfMsgHtml( 'allpagessubmit' ) . "\" />\n";
	$invertbox = "<input type='checkbox' name='invert' value='1' id='nsinvert'" . ( $invert ? ' checked="checked"' : '' ) . ' />';
	
	if ( $wgAllowCategorizedRecentChanges ) {
		$categories = trim ( $wgRequest->getVal ( 'categories' , "" ) ) ;
		$cb_arr = array( 'type' => 'checkbox', 'name' => 'categories_any', 'value' => "1" ) ;
		if ( $categories_any ) $cb_arr['checked'] = "checked" ;
		$catbox = "<br />" ;
		$catbox .= wfMsgExt('rc_categories', array('parseinline')) . " ";
		$catbox .= wfElement('input', array( 'type' => 'text', 'name' => 'categories', 'value' => $categories));
		$catbox .= " &nbsp;" ;
		$catbox .= wfElement('input', $cb_arr );
		$catbox .= wfMsgExt('rc_categories_any', array('parseinline'));
	} else {
		$catbox = "" ;
	}
	
	$out = "<div class='namespacesettings'><form method='get' action='{$wgScript}'>\n";

	foreach ( $nondefaults as $key => $value ) {
		if ($key != 'namespace' && $key != 'invert')
			$out .= wfElement('input', array( 'type' => 'hidden', 'name' => $key, 'value' => $value));
	}

	$out .= '<input type="hidden" name="title" value="'.$t->getPrefixedText().'" />';
	$out .= "
<div id='nsselect' class='recentchanges'>
	<label for='namespace'>" . wfMsgHtml('namespace') . "</label>
	{$namespaceselect}{$submitbutton}{$invertbox} <label for='nsinvert'>" . wfMsgHtml('invert') . "</label>{$catbox}\n</div>";
	$out .= '</form></div>';
	return $out;
}


/**
 * Format a diff for the newsfeed
 */
function rcFormatDiff( $row ) {
	$titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
	return rcFormatDiffRow( $titleObj,
		$row->rc_last_oldid, $row->rc_this_oldid,
		$row->rc_timestamp,
		$row->rc_comment );
}

function rcFormatDiffRow( $title, $oldid, $newid, $timestamp, $comment ) {
	global $wgFeedDiffCutoff, $wgContLang, $wgUser;
	$fname = 'rcFormatDiff';
	wfProfileIn( $fname );

	require_once( 'DifferenceEngine.php' );
	$skin = $wgUser->getSkin();
	$completeText = '<p>' . $skin->formatComment( $comment ) . "</p>\n";

	if( $title->getNamespace() >= 0 ) {
		if( $oldid ) {
			wfProfileIn( "$fname-dodiff" );

			$de = new DifferenceEngine( $title, $oldid, $newid );
			#$diffText = $de->getDiff( wfMsg( 'revisionasof',
			#	$wgContLang->timeanddate( $timestamp ) ),
			#	wfMsg( 'currentrev' ) );
			$diffText = $de->getDiff(
				wfMsg( 'previousrevision' ), // hack
				wfMsg( 'revisionasof',
					$wgContLang->timeanddate( $timestamp ) ) );
				

			if ( strlen( $diffText ) > $wgFeedDiffCutoff ) {
				// Omit large diffs
				$diffLink = $title->escapeFullUrl(
					'diff=' . $newid .
					'&oldid=' . $oldid );
				$diffText = '<a href="' .
					$diffLink .
					'">' .
					htmlspecialchars( wfMsgForContent( 'difference' ) ) .
					'</a>';
			} elseif ( $diffText === false ) {
				// Error in diff engine, probably a missing revision
				$diffText = "<p>Can't load revision $newid</p>";
			} else {
				// Diff output fine, clean up any illegal UTF-8
				$diffText = UtfNormal::cleanUp( $diffText );
				$diffText = rcApplyDiffStyle( $diffText );
			}
			wfProfileOut( "$fname-dodiff" );
		} else {
			$rev = Revision::newFromId( $newid );
			if( is_null( $rev ) ) {
				$newtext = '';
			} else {
				$newtext = $rev->getText();
			}
			$diffText = '<p><b>' . wfMsg( 'newpage' ) . '</b></p>' .
				'<div>' . nl2br( htmlspecialchars( $newtext ) ) . '</div>';
		}
		$completeText .= $diffText;
	}

	wfProfileOut( $fname );
	return $completeText;
}

/**
 * Hacky application of diff styles for the feeds.
 * Might be 'cleaner' to use DOM or XSLT or something,
 * but *gack* it's a pain in the ass.
 *
 * @param $text String:
 * @return string
 * @private
 */
function rcApplyDiffStyle( $text ) {
	$styles = array(
		'diff'             => 'background-color: white;',
		'diff-otitle'      => 'background-color: white;',
		'diff-ntitle'      => 'background-color: white;',
		'diff-addedline'   => 'background: #cfc; font-size: smaller;',
		'diff-deletedline' => 'background: #ffa; font-size: smaller;',
		'diff-context'     => 'background: #eee; font-size: smaller;',
		'diffchange'       => 'color: red; font-weight: bold;',
	);
	
	foreach( $styles as $class => $style ) {
		$text = preg_replace( "/(<[^>]+)class=(['\"])$class\\2([^>]*>)/",
			"\\1style=\"$style\"\\3", $text );
	}
	
	return $text;
}

?>