specialrecentchanges.php

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<?php
/**
 *
 * @package MediaWiki
 * @subpackage SpecialPage
 */

/**
 *
 */
require_once( 'ChangesList.php' );

/**
 * Constructor
 */
function wfSpecialRecentchanges( $par, $specialPage ) {
	global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol, $wgDBtype;
	global $wgRCShowWatchingUsers, $wgShowUpdatedMarker;
	global $wgAllowCategorizedRecentChanges ;
	$fname = 'wfSpecialRecentchanges';

	# Get query parameters
	$feedFormat = $wgRequest->getVal( 'feed' );

	/* Checkbox values can't be true be default, because
	 * we cannot differentiate between unset and not set at all
	 */
	$defaults = array(
	/* int  */ 'days' => $wgUser->getDefaultOption('rcdays'),
	/* int  */ 'limit' => $wgUser->getDefaultOption('rclimit'),
	/* bool */ 'hideminor' => false,
	/* bool */ 'hidebots' => true,
	/* bool */ 'hideanons' => false,
	/* bool */ 'hideliu' => false,
	/* bool */ 'hidepatrolled' => false,
	/* bool */ 'hidemyself' => false,
	/* text */ 'from' => '',
	/* text */ 'namespace' => null,
	/* bool */ 'invert' => false,
	/* bool */ 'categories_any' => false,
	);

	extract($defaults);


	$days = $wgUser->getOption( 'rcdays' );
	if ( !$days ) { $days = $defaults['days']; }
	$days = $wgRequest->getInt( 'days', $days );

	$limit = $wgUser->getOption( 'rclimit' );
	if ( !$limit ) { $limit = $defaults['limit']; }

	#	list( $limit, $offset ) = wfCheckLimits( 100, 'rclimit' );
	$limit = $wgRequest->getInt( 'limit', $limit );

	/* order of selection: url > preferences > default */
	$hideminor = $wgRequest->getBool( 'hideminor', $wgUser->getOption( 'hideminor') ? true : $defaults['hideminor'] );
	
	# As a feed, use limited settings only
	if( $feedFormat ) {
		global $wgFeedLimit;
		if( $limit > $wgFeedLimit ) {
			$options['limit'] = $wgFeedLimit;
		}

	} else {

		$namespace = $wgRequest->getIntOrNull( 'namespace' );
		$invert = $wgRequest->getBool( 'invert', $defaults['invert'] );
		$hidebots = $wgRequest->getBool( 'hidebots', $defaults['hidebots'] );
		$hideanons = $wgRequest->getBool( 'hideanons', $defaults['hideanons'] );
		$hideliu = $wgRequest->getBool( 'hideliu', $defaults['hideliu'] );
		$hidepatrolled = $wgRequest->getBool( 'hidepatrolled', $defaults['hidepatrolled'] );
		$hidemyself = $wgRequest->getBool ( 'hidemyself', $defaults['hidemyself'] );
		$from = $wgRequest->getVal( 'from', $defaults['from'] );

		# Get query parameters from path
		if( $par ) {
			$bits = preg_split( '/\s*,\s*/', trim( $par ) );
			foreach ( $bits as $bit ) {
				if ( 'hidebots' == $bit ) $hidebots = 1;
				if ( 'bots' == $bit ) $hidebots = 0;
				if ( 'hideminor' == $bit ) $hideminor = 1;
				if ( 'minor' == $bit ) $hideminor = 0;
				if ( 'hideliu' == $bit ) $hideliu = 1;
				if ( 'hidepatrolled' == $bit ) $hidepatrolled = 1;
				if ( 'hideanons' == $bit ) $hideanons = 1;
				if ( 'hidemyself' == $bit ) $hidemyself = 1;

				if ( is_numeric( $bit ) ) {
					$limit = $bit;
				}

				if ( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
					$limit = $m[1];
				}

				if ( preg_match( '/^days=(\d+)$/', $bit, $m ) ) {
					$days = $m[1];
				}
			}
		}
	}

	if ( $limit < 0 || $limit > 5000 ) $limit = $defaults['limit'];


	# Database connection and caching
	$dbr =& wfGetDB( DB_SLAVE );
	extract( $dbr->tableNames( 'recentchanges', 'watchlist' ) );


	$cutoff_unixtime = time() - ( $days * 86400 );
	$cutoff_unixtime = $cutoff_unixtime - ($cutoff_unixtime % 86400);
	$cutoff = $dbr->timestamp( $cutoff_unixtime );
	if(preg_match('/^[0-9]{14}$/', $from) and $from > wfTimestamp(TS_MW,$cutoff)) {
		$cutoff = $dbr->timestamp($from);
	} else {
		$from = $defaults['from'];
	}

	# 10 seconds server-side caching max
	$wgOut->setSquidMaxage( 10 );

	# Get last modified date, for client caching
	# Don't use this if we are using the patrol feature, patrol changes don't update the timestamp
	$lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', false, $fname );
	if ( $feedFormat || !$wgUseRCPatrol ) {
		if( $lastmod && $wgOut->checkLastModified( $lastmod ) ){
			# Client cache fresh and headers sent, nothing more to do.
			return;
		}
	}

	# It makes no sense to hide both anons and logged-in users
	# Where this occurs, force anons to be shown
	if( $hideanons && $hideliu )
		$hideanons = false;

	# Form WHERE fragments for all the options
	$hidem  = $hideminor ? 'AND rc_minor = 0' : '';
	$hidem .= $hidebots ? ' AND rc_bot = 0' : '';
	$hidem .= $hideliu ? ' AND rc_user = 0' : '';
	$hidem .= ( $wgUseRCPatrol && $hidepatrolled ) ? ' AND rc_patrolled = 0' : '';
	$hidem .= $hideanons ? ' AND rc_user != 0' : '';
	
	if( $hidemyself ) {
		if( $wgUser->getID() ) {
			$hidem .= ' AND rc_user != ' . $wgUser->getID();
		} else {
			$hidem .= ' AND rc_user_text != ' . $dbr->addQuotes( $wgUser->getName() );
		}
	}

	# Namespace filtering
	$hidem .= is_null( $namespace ) ?  '' : ' AND rc_namespace' . ($invert ? '!=' : '=') . $namespace;

	// This is the big thing!

	$uid = $wgUser->getID();

	// Perform query
	$forceclause = $dbr->useIndexClause("rc_timestamp");
	$sql2 = "SELECT * FROM $recentchanges $forceclause".
	  ($uid ? "LEFT OUTER JOIN $watchlist ON wl_user={$uid} AND wl_title=rc_title AND wl_namespace=rc_namespace " : "") .
	  "WHERE rc_timestamp >= '{$cutoff}' {$hidem} " .
	  "ORDER BY rc_timestamp DESC";
	$sql2 = $dbr->limitResult($sql2, $limit, 0);
	$res = $dbr->query( $sql2, $fname );

	// Fetch results, prepare a batch link existence check query
	$rows = array();
	$batch = new LinkBatch;
	while( $row = $dbr->fetchObject( $res ) ){
		$rows[] = $row;
		if ( !$feedFormat ) {
			// User page link
			$title = Title::makeTitleSafe( NS_USER, $row->rc_user_text );
			$batch->addObj( $title );

			// User talk
			$title = Title::makeTitleSafe( NS_USER_TALK, $row->rc_user_text );
			$batch->addObj( $title );
		}

	}
	$dbr->freeResult( $res );

	if( $feedFormat ) {
		rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod );
	} else {

		# Web output...

		// Run existence checks
		$batch->execute();
		$any = $wgRequest->getBool( 'categories_any', $defaults['categories_any']);

		// Output header
		if ( !$specialPage->including() ) {
			$wgOut->addWikiText( wfMsgForContent( "recentchangestext" ) );

			// Dump everything here
			$nondefaults = array();

			wfAppendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'limit', $limit , $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'hideminor', $hideminor, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'hidebots', $hidebots, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'hideanons', $hideanons, $defaults, $nondefaults );
			wfAppendToArrayIfNotDefault( 'hideliu', $hideliu, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'hidepatrolled', $hidepatrolled, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'hidemyself', $hidemyself, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'from', $from, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'namespace', $namespace, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'invert', $invert, $defaults, $nondefaults);
			wfAppendToArrayIfNotDefault( 'categories_any', $any, $defaults, $nondefaults);

			// Add end of the texts
			$wgOut->addHTML( '<div class="rcoptions">' . rcOptionsPanel( $defaults, $nondefaults ) . "\n" );
			$wgOut->addHTML( rcNamespaceForm( $namespace, $invert, $nondefaults, $any ) . '</div>'."\n");
		}

		// And now for the content
		$sk = $wgUser->getSkin();
		$wgOut->setSyndicated( true );

		$list = ChangesList::newFromUser( $wgUser );
		
		if ( $wgAllowCategorizedRecentChanges ) {
			$categories = trim ( $wgRequest->getVal ( 'categories' , "" ) ) ;
			$categories = str_replace ( "|" , "\n" , $categories ) ;
			$categories = explode ( "\n" , $categories ) ;
			rcFilterByCategories ( $rows , $categories , $any ) ;
		}

		$s = $list->beginRecentChangesList();
		$counter = 1;
		foreach( $rows as $obj ){
			if( $limit == 0) {
				break;
			}

			if ( ! ( $hideminor     && $obj->rc_minor     ) &&
			     ! ( $hidepatrolled && $obj->rc_patrolled ) ) {
				$rc = RecentChange::newFromRow( $obj );
				$rc->counter = $counter++;

				if ($wgShowUpdatedMarker
					&& !empty( $obj->wl_notificationtimestamp )
					&& ($obj->rc_timestamp >= $obj->wl_notificationtimestamp)) {
						$rc->notificationtimestamp = true;
				} else {
					$rc->notificationtimestamp = false;
				}

				if ($wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
					$sql3 = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_title='" . $dbr->strencode($obj->rc_title) ."' AND wl_namespace=$obj->rc_namespace" ;
					$res3 = $dbr->query( $sql3, 'wfSpecialRecentChanges');
					$x = $dbr->fetchObject( $res3 );
					$rc->numberofWatchingusers = $x->n;
				} else {
					$rc->numberofWatchingusers = 0;
				}
				$s .= $list->recentChangesLine( $rc, !empty( $obj->wl_user ) );
				--$limit;
			}
		}
		$s .= $list->endRecentChangesList();
		$wgOut->addHTML( $s );
	}
}

function rcFilterByCategories ( &$rows , $categories , $any ) {
	require_once ( 'Categoryfinder.php' ) ;
	
	# Filter categories
	$cats = array () ;
	foreach ( $categories AS $cat ) {
		$cat = trim ( $cat ) ;
		if ( $cat == "" ) continue ;
		$cats[] = $cat ;
	}
	
	# Filter articles
	$articles = array () ;
	$a2r = array () ;
	foreach ( $rows AS $k => $r ) {
		$nt = Title::newFromText ( $r->rc_title , $r->rc_namespace ) ;
		$id = $nt->getArticleID() ;
		if ( $id == 0 ) continue ; # Page might have been deleted...
		if ( !in_array ( $id , $articles ) ) {
			$articles[] = $id ;
		}
		if ( !isset ( $a2r[$id] ) ) {
			$a2r[$id] = array() ;
		}
		$a2r[$id][] = $k ;
	}
	
	# Shortcut?
	if ( count ( $articles ) == 0 OR count ( $cats ) == 0 )
		return ;
	
	# Look up
	$c = new Categoryfinder ;
	$c->seed ( $articles , $cats , $any ? "OR" : "AND" ) ;
	$match = $c->run () ;
	
	# Filter
	$newrows = array () ;
	foreach ( $match AS $id ) {
		foreach ( $a2r[$id] AS $rev ) {
			$k = $rev ;
			$newrows[$k] = $rows[$k] ;
		}
	}
	$rows = $newrows ;
}

function rcOutputFeed( $rows, $feedFormat, $limit, $hideminor, $lastmod ) {
	global $messageMemc, $wgDBname, $wgFeedCacheTimeout;
	global $wgFeedClasses, $wgTitle, $wgSitename, $wgContLanguageCode;

	if( !isset( $wgFeedClasses[$feedFormat] ) ) {
		wfHttpError( 500, "Internal Server Error", "Unsupported feed type." );
		return false;
	}

	$timekey = "$wgDBname:rcfeed:$feedFormat:timestamp";
	$key = "$wgDBname:rcfeed:$feedFormat:limit:$limit:minor:$hideminor";

	$feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'recentchanges' ) .
		' [' . $wgContLanguageCode . ']';
	$feed = new $wgFeedClasses[$feedFormat](
		$feedTitle,
		htmlspecialchars( wfMsgForContent( 'recentchangestext' ) ),
		$wgTitle->getFullUrl() );

	/**
	 * Bumping around loading up diffs can be pretty slow, so where
	 * possible we want to cache the feed output so the next visitor
	 * gets it quick too.
	 */
	$cachedFeed = false;
	if( ( $wgFeedCacheTimeout > 0 ) && ( $feedLastmod = $messageMemc->get( $timekey ) ) ) {
		/**
		 * If the cached feed was rendered very recently, we may
		 * go ahead and use it even if there have been edits made
		 * since it was rendered. This keeps a swarm of requests
		 * from being too bad on a super-frequently edited wiki.
		 */
		if( time() - wfTimestamp( TS_UNIX, $feedLastmod )
				< $wgFeedCacheTimeout
			|| wfTimestamp( TS_UNIX, $feedLastmod )