Fix regression in even sizing of diff columns; forgot to restore a couple bits I...

[mediawiki.git] / includes / RecentChange.php

<?php
/**
 *
 */

/**
 * Utility class for creating new RC entries
 * mAttribs:
 *      rc_id           id of the row in the recentchanges table
 *      rc_timestamp    time the entry was made
 *      rc_cur_time     timestamp on the cur row
 *      rc_namespace    namespace #
 *      rc_title        non-prefixed db key
 *      rc_type         is new entry, used to determine whether updating is necessary
 *      rc_minor        is minor
 *      rc_cur_id       page_id of associated page entry
 *      rc_user         user id who made the entry
 *      rc_user_text    user name who made the entry
 *      rc_comment      edit summary
 *      rc_this_oldid   rev_id associated with this entry (or zero)
 *      rc_last_oldid   rev_id associated with the entry before this one (or zero)
 *      rc_bot          is bot, hidden
 *      rc_ip           IP address of the user in dotted quad notation
 *      rc_new          obsolete, use rc_type==RC_NEW
 *      rc_patrolled    boolean whether or not someone has marked this edit as patrolled
 *      rc_old_len      integer byte length of the text before the edit
 *      rc_new_len      the same after the edit
 *
 * mExtra:
 *      prefixedDBkey   prefixed db key, used by external app via msg queue
 *      lastTimestamp   timestamp of previous entry, used in WHERE clause during update
 *      lang            the interwiki prefix, automatically set in save()
 *  oldSize         text size before the change
 *  newSize         text size after the change
 *
 * temporary:           not stored in the database
 *      notificationtimestamp
 *      numberofWatchingusers
 *
 * @todo document functions and variables
 */
class RecentChange
{
        var $mAttribs = array(), $mExtra = array();
        var $mTitle = false, $mMovedToTitle = false;
        var $numberofWatchingusers = 0 ; # Dummy to prevent error message in SpecialRecentchangeslinked

        # Factory methods

        public static function newFromRow( $row )
        {
                $rc = new RecentChange;
                $rc->loadFromRow( $row );
                return $rc;
        }

        public static function newFromCurRow( $row, $rc_this_oldid = 0 )
        {
                $rc = new RecentChange;
                $rc->loadFromCurRow( $row, $rc_this_oldid );
                $rc->notificationtimestamp = false;
                $rc->numberofWatchingusers = false;
                return $rc;
        }
        
        /**
         * Obtain the recent change with a given rc_id value
         *
         * @param $rcid rc_id value to retrieve
         * @return RecentChange
         */
        public static function newFromId( $rcid ) {
                $dbr = wfGetDB( DB_SLAVE );
                $res = $dbr->select( 'recentchanges', '*', array( 'rc_id' => $rcid ), __METHOD__ );
                if( $res && $dbr->numRows( $res ) > 0 ) {
                        $row = $dbr->fetchObject( $res );
                        $dbr->freeResult( $res );
                        return self::newFromRow( $row );
                } else {
                        return NULL;
                }
        }

        # Accessors

        function setAttribs( $attribs )
        {
                $this->mAttribs = $attribs;
        }

        function setExtra( $extra )
        {
                $this->mExtra = $extra;
        }

        function &getTitle()
        {
                if ( $this->mTitle === false ) {
                        $this->mTitle = Title::makeTitle( $this->mAttribs['rc_namespace'], $this->mAttribs['rc_title'] );
                }
                return $this->mTitle;
        }

        function getMovedToTitle()
        {
                if ( $this->mMovedToTitle === false ) {
                        $this->mMovedToTitle = Title::makeTitle( $this->mAttribs['rc_moved_to_ns'],
                                $this->mAttribs['rc_moved_to_title'] );
                }
                return $this->mMovedToTitle;
        }

        # Writes the data in this object to the database
        function save()
        {
                global $wgLocalInterwiki, $wgPutIPinRC, $wgRC2UDPAddress, $wgRC2UDPPort, $wgRC2UDPPrefix;
                $fname = 'RecentChange::save';

                $dbw = wfGetDB( DB_MASTER );
                if ( !is_array($this->mExtra) ) {
                        $this->mExtra = array();
                }
                $this->mExtra['lang'] = $wgLocalInterwiki;

                if ( !$wgPutIPinRC ) {
                        $this->mAttribs['rc_ip'] = '';
                }

                ## If our database is strict about IP addresses, use NULL instead of an empty string
                if ( $dbw->strictIPs() and $this->mAttribs['rc_ip'] == '' ) {
                        unset( $this->mAttribs['rc_ip'] );
                }

                # Fixup database timestamps
                $this->mAttribs['rc_timestamp'] = $dbw->timestamp($this->mAttribs['rc_timestamp']);
                $this->mAttribs['rc_cur_time'] = $dbw->timestamp($this->mAttribs['rc_cur_time']);
                $this->mAttribs['rc_id'] = $dbw->nextSequenceValue( 'rc_rc_id_seq' );

                ## If we are using foreign keys, an entry of 0 for the page_id will fail, so use NULL
                if ( $dbw->cascadingDeletes() and $this->mAttribs['rc_cur_id']==0 ) {
                        unset ( $this->mAttribs['rc_cur_id'] );
                }

                # Insert new row
                $dbw->insert( 'recentchanges', $this->mAttribs, $fname );

                # Set the ID
                $this->mAttribs['rc_id'] = $dbw->insertId();

                # Update old rows, if necessary
                if ( $this->mAttribs['rc_type'] == RC_EDIT ) {
                        $lastTime = $this->mExtra['lastTimestamp'];
                        #$now = $this->mAttribs['rc_timestamp'];
                        #$curId = $this->mAttribs['rc_cur_id'];

                        # Don't bother looking for entries that have probably
                        # been purged, it just locks up the indexes needlessly.
                        global $wgRCMaxAge;
                        $age = time() - wfTimestamp( TS_UNIX, $lastTime );
                        if( $age < $wgRCMaxAge ) {
                                # live hack, will commit once tested - kate
                                # Update rc_this_oldid for the entries which were current
                                #
                                #$oldid = $this->mAttribs['rc_last_oldid'];
                                #$ns = $this->mAttribs['rc_namespace'];
                                #$title = $this->mAttribs['rc_title'];
                                #
                                #$dbw->update( 'recentchanges',
                                #       array( /* SET */
                                #               'rc_this_oldid' => $oldid
                                #       ), array( /* WHERE */
                                #               'rc_namespace' => $ns,
                                #               'rc_title' => $title,
                                #               'rc_timestamp' => $dbw->timestamp( $lastTime )
                                #       ), $fname
                                #);
                        }

                        # Update rc_cur_time
                        #$dbw->update( 'recentchanges', array( 'rc_cur_time' => $now ),
                        #       array( 'rc_cur_id' => $curId ), $fname );
                }

                # Notify external application via UDP
                if ( $wgRC2UDPAddress ) {
                        $conn = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP );
                        if ( $conn ) {
                                $line = $wgRC2UDPPrefix . $this->getIRCLine();
                                socket_sendto( $conn, $line, strlen($line), 0, $wgRC2UDPAddress, $wgRC2UDPPort );
                                socket_close( $conn );
                        }
                }

                # E-mail notifications
                global $wgUseEnotif;
                if( $wgUseEnotif ) {
                        # this would be better as an extension hook
                        global $wgUser;
                        include_once( "UserMailer.php" );
                        $enotif = new EmailNotification();
                        $title = Title::makeTitle( $this->mAttribs['rc_namespace'], $this->mAttribs['rc_title'] );
                        $enotif->notifyOnPageChange( $wgUser, $title,
                                $this->mAttribs['rc_timestamp'],
                                $this->mAttribs['rc_comment'],
                                $this->mAttribs['rc_minor'],
                                $this->mAttribs['rc_last_oldid'] );
                }

                # Notify extensions
                wfRunHooks( 'RecentChange_save', array( &$this ) );
        }

        # Marks a certain row as patrolled
        function markPatrolled( $rcid )
        {
                $fname = 'RecentChange::markPatrolled';

                $dbw = wfGetDB( DB_MASTER );

                $dbw->update( 'recentchanges',
                        array( /* SET */
                                'rc_patrolled' => 1
                        ), array( /* WHERE */
                                'rc_id' => $rcid
                        ), $fname
                );
        }

        # Makes an entry in the database corresponding to an edit
        /*static*/ function notifyEdit( $timestamp, &$title, $minor, &$user, $comment,
                $oldId, $lastTimestamp, $bot = "default", $ip = '', $oldSize = 0, $newSize = 0,
                $newId = 0)
        {

                if ( $bot === 'default' ) {
                        $bot = $user->isAllowed( 'bot' );
                }

                if ( !$ip ) {
                        $ip = wfGetIP();
                        if ( !$ip ) {
                                $ip = '';
                        }
                }

                $rc = new RecentChange;
                $rc->mAttribs = array(
                        'rc_timestamp'  => $timestamp,
                        'rc_cur_time'   => $timestamp,
                        'rc_namespace'  => $title->getNamespace(),
                        'rc_title'      => $title->getDBkey(),
                        'rc_type'       => RC_EDIT,
                        'rc_minor'      => $minor ? 1 : 0,
                        'rc_cur_id'     => $title->getArticleID(),
                        'rc_user'       => $user->getID(),
                        'rc_user_text'  => $user->getName(),
                        'rc_comment'    => $comment,
                        'rc_this_oldid' => $newId,
                        'rc_last_oldid' => $oldId,
                        'rc_bot'        => $bot ? 1 : 0,
                        'rc_moved_to_ns'        => 0,
                        'rc_moved_to_title'     => '',
                        'rc_ip'         => $ip,
                        'rc_patrolled'  => 0,
                        'rc_new'        => 0,  # obsolete
                        'rc_old_len'    => $oldSize,
                        'rc_new_len'    => $newSize
                );

                $rc->mExtra =  array(
                        'prefixedDBkey' => $title->getPrefixedDBkey(),
                        'lastTimestamp' => $lastTimestamp,
                        'oldSize'       => $oldSize,
                        'newSize'       => $newSize,
                );
                $rc->save();
                return( $rc->mAttribs['rc_id'] );
        }

        /**
         * Makes an entry in the database corresponding to page creation
         * Note: the title object must be loaded with the new id using resetArticleID()
         * @todo Document parameters and return
         */
        public static function notifyNew( $timestamp, &$title, $minor, &$user, $comment, $bot = 'default',
          $ip='', $size = 0, $newId = 0 )
        {
                if ( !$ip ) {
                        $ip = wfGetIP();
                        if ( !$ip ) {
                                $ip = '';
                        }
                }
                if ( $bot === 'default' ) {
                        $bot = $user->isAllowed( 'bot' );
                }

                $rc = new RecentChange;
                $rc->mAttribs = array(
                        'rc_timestamp'      => $timestamp,
                        'rc_cur_time'       => $timestamp,
                        'rc_namespace'      => $title->getNamespace(),
                        'rc_title'          => $title->getDBkey(),
                        'rc_type'           => RC_NEW,
                        'rc_minor'          => $minor ? 1 : 0,
                        'rc_cur_id'         => $title->getArticleID(),
                        'rc_user'           => $user->getID(),
                        'rc_user_text'      => $user->getName(),
                        'rc_comment'        => $comment,
                        'rc_this_oldid'     => $newId,
                        'rc_last_oldid'     => 0,
                        'rc_bot'            => $bot ? 1 : 0,
                        'rc_moved_to_ns'    => 0,
                        'rc_moved_to_title' => '',
                        'rc_ip'             => $ip,
                        'rc_patrolled'      => 0,
                        'rc_new'            => 1, # obsolete
                        'rc_old_len'        => 0,
                        'rc_new_len'        => $size
                );

                $rc->mExtra =  array(
                        'prefixedDBkey' => $title->getPrefixedDBkey(),
                        'lastTimestamp' => 0,
                        'oldSize' => 0,
                        'newSize' => $size
                );
                $rc->save();
                return( $rc->mAttribs['rc_id'] );
        }

        # Makes an entry in the database corresponding to a rename
        /*static*/ function notifyMove( $timestamp, &$oldTitle, &$newTitle, &$user, $comment, $ip='', $overRedir = false )
        {
                if ( !$ip ) {
                        $ip = wfGetIP();
                        if ( !$ip ) {
                                $ip = '';
                        }
                }

                $rc = new RecentChange;
                $rc->mAttribs = array(
                        'rc_timestamp'  => $timestamp,
                        'rc_cur_time'   => $timestamp,
                        'rc_namespace'  => $oldTitle->getNamespace(),
                        'rc_title'      => $oldTitle->getDBkey(),
                        'rc_type'       => $overRedir ? RC_MOVE_OVER_REDIRECT : RC_MOVE,
                        'rc_minor'      => 0,
                        'rc_cur_id'     => $oldTitle->getArticleID(),
                        'rc_user'       => $user->getID(),
                        'rc_user_text'  => $user->getName(),
                        'rc_comment'    => $comment,
                        'rc_this_oldid' => 0,
                        'rc_last_oldid' => 0,
                        'rc_bot'        => $user->isAllowed( 'bot' ) ? 1 : 0,
                        'rc_moved_to_ns'        => $newTitle->getNamespace(),
                        'rc_moved_to_title'     => $newTitle->getDBkey(),
                        'rc_ip'         => $ip,
                        'rc_new'        => 0, # obsolete
                        'rc_patrolled'  => 1,
                        'rc_old_len'    => NULL,
                        'rc_new_len'    => NULL,
                );

                $rc->mExtra = array(
                        'prefixedDBkey' => $oldTitle->getPrefixedDBkey(),
                        'lastTimestamp' => 0,
                        'prefixedMoveTo'        => $newTitle->getPrefixedDBkey()
                );
                $rc->save();
        }

        /* static */ function notifyMoveToNew( $timestamp, &$oldTitle, &$newTitle, &$user, $comment, $ip='' ) {
                RecentChange::notifyMove( $timestamp, $oldTitle, $newTitle, $user, $comment, $ip, false );
        }

        /* static */ function notifyMoveOverRedirect( $timestamp, &$oldTitle, &$newTitle, &$user, $comment, $ip='' ) {
                RecentChange::notifyMove( $timestamp, $oldTitle, $newTitle, $user, $comment, $ip, true );
        }

        # A log entry is different to an edit in that previous revisions are
        # not kept
        /*static*/ function notifyLog( $timestamp, &$title, &$user, $comment, $ip='',
           $type, $action, $target, $logComment, $params )
        {
                if ( !$ip ) {
                        $ip = wfGetIP();
                        if ( !$ip ) {
                                $ip = '';
                        }
                }

                $rc = new RecentChange;
                $rc->mAttribs = array(
                        'rc_timestamp'  => $timestamp,
                        'rc_cur_time'   => $timestamp,
                        'rc_namespace'  => $title->getNamespace(),
                        'rc_title'      => $title->getDBkey(),
                        'rc_type'       => RC_LOG,
                        'rc_minor'      => 0,
                        'rc_cur_id'     => $title->getArticleID(),
                        'rc_user'       => $user->getID(),
                        'rc_user_text'  => $user->getName(),
                        'rc_comment'    => $comment,
                        'rc_this_oldid' => 0,
                        'rc_last_oldid' => 0,
                        'rc_bot'        => $user->isAllowed( 'bot' ) ? 1 : 0,
                        'rc_moved_to_ns'        => 0,
                        'rc_moved_to_title'     => '',
                        'rc_ip' => $ip,
                        'rc_patrolled' => 1,
                        'rc_new'        => 0, # obsolete
                        'rc_old_len'    => NULL,
                        'rc_new_len'    => NULL,
                );
                $rc->mExtra =  array(
                        'prefixedDBkey' => $title->getPrefixedDBkey(),
                        'lastTimestamp' => 0,
                        'logType' => $type,
                        'logAction' => $action,
                        'logComment' => $logComment,
                        'logTarget' => $target,
                        'logParams' => $params
                );
                $rc->save();
        }

        # Initialises the members of this object from a mysql row object
        function loadFromRow( $row )
        {
                $this->mAttribs = get_object_vars( $row );
                $this->mAttribs["rc_timestamp"] = wfTimestamp(TS_MW, $this->mAttribs["rc_timestamp"]);
                $this->mExtra = array();
        }

        # Makes a pseudo-RC entry from a cur row
        function loadFromCurRow( $row )
        {
                $this->mAttribs = array(
                        'rc_timestamp' => wfTimestamp(TS_MW, $row->rev_timestamp),
                        'rc_cur_time' => $row->rev_timestamp,
                        'rc_user' => $row->rev_user,
                        'rc_user_text' => $row->rev_user_text,
                        'rc_namespace' => $row->page_namespace,
                        'rc_title' => $row->page_title,
                        'rc_comment' => $row->rev_comment,
                        'rc_minor' => $row->rev_minor_edit ? 1 : 0,
                        'rc_type' => $row->page_is_new ? RC_NEW : RC_EDIT,
                        'rc_cur_id' => $row->page_id,
                        'rc_this_oldid' => $row->rev_id,
                        'rc_last_oldid' => isset($row->rc_last_oldid) ? $row->rc_last_oldid : 0,
                        'rc_bot'        => 0,
                        'rc_moved_to_ns'        => 0,
                        'rc_moved_to_title'     => '',
                        'rc_ip' => '',
                        'rc_id' => $row->rc_id,
                        'rc_patrolled' => $row->rc_patrolled,
                        'rc_new' => $row->page_is_new, # obsolete
                        'rc_old_len' => $row->rc_old_len,
                        'rc_new_len' => $row->rc_new_len,
                );

                $this->mExtra = array();
        }

        /**
         * Get an attribute value
         *
         * @param $name Attribute name
         * @return mixed
         */
        public function getAttribute( $name ) {
                return isset( $this->mAttribs[$name] ) ? $this->mAttribs[$name] : NULL;
        }

        /**
         * Gets the end part of the diff URL associated with this object
         * Blank if no diff link should be displayed
         */
        function diffLinkTrail( $forceCur )
        {
                if ( $this->mAttribs['rc_type'] == RC_EDIT ) {
                        $trail = "curid=" . (int)($this->mAttribs['rc_cur_id']) .
                                "&oldid=" . (int)($this->mAttribs['rc_last_oldid']);
                        if ( $forceCur ) {
                                $trail .= '&diff=0' ;
                        } else {
                                $trail .= '&diff=' . (int)($this->mAttribs['rc_this_oldid']);
                        }
                } else {
                        $trail = '';
                }
                return $trail;
        }

        function cleanupForIRC( $text ) {
                return str_replace(array("\n", "\r"), array("", ""), $text);
        }

        function getIRCLine() {
                global $wgUseRCPatrol;

                // FIXME: Would be good to replace these 2 extract() calls with something more explicit
                // e.g. list ($rc_type, $rc_id) = array_values ($this->mAttribs); [or something like that]
                extract($this->mAttribs);
                extract($this->mExtra);

                $titleObj =& $this->getTitle();
                if ( $rc_type == RC_LOG ) {
                        $title = Namespace::getCanonicalName( $titleObj->getNamespace() ) . $titleObj->getText();
                } else {
                        $title = $titleObj->getPrefixedText();
                }
                $title = $this->cleanupForIRC( $title );

                $bad = array("\n", "\r");
                $empty = array("", "");
                $title = $titleObj->getPrefixedText();
                $title = str_replace($bad, $empty, $title);

                // FIXME: *HACK* these should be getFullURL(), hacked for SSL madness --brion 2005-12-26
                if ( $rc_type == RC_LOG ) {
                        $url = '';
                } elseif ( $rc_new && $wgUseRCPatrol ) {
                        $url = $titleObj->getInternalURL("rcid=$rc_id");
                } else if ( $rc_new ) {
                        $url = $titleObj->getInternalURL();
                } else if ( $wgUseRCPatrol ) {
                        $url = $titleObj->getInternalURL("diff=$rc_this_oldid&oldid=$rc_last_oldid&rcid=$rc_id");
                } else {
                        $url = $titleObj->getInternalURL("diff=$rc_this_oldid&oldid=$rc_last_oldid");
                }

                if ( isset( $oldSize ) && isset( $newSize ) ) {
                        $szdiff = $newSize - $oldSize;
                        if ($szdiff < -500) {
                                $szdiff = "\002$szdiff\002";
                        } elseif ($szdiff >= 0) {
                                $szdiff = '+' . $szdiff ;
                        }
                        $szdiff = '(' . $szdiff . ')' ;
                } else {
                        $szdiff = '';
                }

                $user = $this->cleanupForIRC( $rc_user_text );

                if ( $rc_type == RC_LOG ) {
                        $logTargetText = $logTarget->getPrefixedText();
                        $comment = $this->cleanupForIRC( str_replace( $logTargetText, "\00302$logTargetText\00310", $rc_comment ) );
                        $flag = $logAction;
                } else {
                        $comment = $this->cleanupForIRC( $rc_comment );
                        $flag = ($rc_minor ? "M" : "") . ($rc_new ? "N" : "");
                }
                # see http://www.irssi.org/documentation/formats for some colour codes. prefix is \003,
                # no colour (\003) switches back to the term default
                $fullString = "\00314[[\00307$title\00314]]\0034 $flag\00310 " .
                              "\00302$url\003 \0035*\003 \00303$user\003 \0035*\003 $szdiff \00310$comment\003\n";
                return $fullString;
        }

        /**
         * Returns the change size (HTML).
         * The lengths can be given optionally.
         */
        function getCharacterDifference( $old = 0, $new = 0 ) {
                global $wgRCChangedSizeThreshold, $wgLang;

                if( $old === 0 ) {
                        $old = $this->mAttribs['rc_old_len'];
                }
                if( $new === 0 ) {
                        $new = $this->mAttribs['rc_new_len'];
                }

                if( $old === NULL || $new === NULL ) {
                        return '';
                }

                $szdiff = $new - $old;
                $formatedSize = wfMsgExt( 'rc-change-size', array( 'parsemag', 'escape'),
                        $wgLang->formatNum($szdiff) );

                if( $szdiff < $wgRCChangedSizeThreshold ) {
                        return '<strong class=\'mw-plusminus-neg\'>(' . $formatedSize . ')</strong>';
                } elseif( $szdiff === 0 ) {
                        return '<span class=\'mw-plusminus-null\'>(' . $formatedSize . ')</span>';
                } elseif( $szdiff > 0 ) {
                        return '<span class=\'mw-plusminus-pos\'>(+' . $formatedSize . ')</span>';
                } else {
                        return '<span class=\'mw-plusminus-neg\'>(' . $formatedSize . ')</span>';
                }
        }
}
?>