(bug 19441) Updated date formatting for Lithuanian

[mediawiki.git] / includes / LogEventsList.php

<?php
# Copyright (C) 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
# http://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

class LogEventsList {
        const NO_ACTION_LINK = 1;

        private $skin;
        private $out;
        public $flags;

        public function __construct( $skin, $out, $flags = 0 ) {
                $this->skin = $skin;
                $this->out = $out;
                $this->flags = $flags;
                $this->preCacheMessages();
        }

        /**
         * As we use the same small set of messages in various methods and that
         * they are called often, we call them once and save them in $this->message
         */
        private function preCacheMessages() {
                // Precache various messages
                if( !isset( $this->message ) ) {
                        $messages = array( 'revertmerge', 'protect_change', 'unblocklink', 'change-blocklink',
                                'revertmove', 'undeletelink', 'undeleteviewlink', 'revdel-restore', 'rev-delundel', 'hist', 'diff',
                                'pipe-separator' );
                        foreach( $messages as $msg ) {
                                $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
                        }
                }
        }

        /**
         * Set page title and show header for this log type
         * @param $type String
         */
        public function showHeader( $type ) {
                if( LogPage::isLogType( $type ) ) {
                        $this->out->setPageTitle( LogPage::logName( $type ) );
                        $this->out->addHTML( LogPage::logHeader( $type ) );
                }
        }

        /**
         * Show options for the log list
         * @param $types string or Array
         * @param $user String
         * @param $page String
         * @param $pattern String
         * @param $year Integer: year
         * @param $month Integer: month
         * @param $filter: array
         * @param $tagFilter: array?
         */
        public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='', 
                $month = '', $filter = null, $tagFilter='' )
        {
                global $wgScript, $wgMiserMode;
                $action = htmlspecialchars( $wgScript );
                $title = SpecialPage::getTitleFor( 'Log' );
                $special = htmlspecialchars( $title->getPrefixedDBkey() );
                // For B/C, we take strings, but make sure they are converted...
                $types = ($types === '') ? array() : (array)$types;

                $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );

                $this->out->addHTML( "<form action=\"$action\" method=\"get\"><fieldset>" .
                        Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
                        Xml::hidden( 'title', $special ) . "\n" .
                        $this->getTypeMenu( $types ) . "\n" .
                        $this->getUserInput( $user ) . "\n" .
                        $this->getTitleInput( $page ) . "\n" .
                        ( !$wgMiserMode ? ($this->getTitlePattern( $pattern )."\n") : "" ) .
                        "<p>" . Xml::dateMenu( $year, $month ) . "\n" .
                        ( $tagSelector ? Xml::tags( 'p', null, implode( '&nbsp;', $tagSelector ) ) :'' ). "\n" .
                        ( $filter ? "</p><p>".$this->getFilterLinks( $filter )."\n" : "" ) . "\n" .
                        Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "</p>\n" .
                        "</fieldset></form>"
                );
        }
        
        /**
         * @param $filter Array
         * @return String: Formatted HTML
         */
        private function getFilterLinks( $filter ) {
                global $wgTitle, $wgLang;
                // show/hide links
                $messages = array( wfMsgHtml( 'show' ), wfMsgHtml( 'hide' ) );
                // Option value -> message mapping
                $links = array();
                $hiddens = ''; // keep track for "go" button
                foreach( $filter as $type => $val ) {
                        // Should the below assignment be outside the foreach?
                        // Then it would have to be copied. Not certain what is more expensive.
                        $query = $this->getDefaultQuery();
                        $queryKey = "hide_{$type}_log";

                        $hideVal = 1 - intval($val);
                        $query[$queryKey] = $hideVal;

                        $link = $this->skin->link(
                                $wgTitle,
                                $messages[$hideVal],
                                array(),
                                $query,
                                array( 'known', 'noclasses' )
                        );

                        $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
                        $hiddens .= Xml::hidden( "hide_{$type}_log", $val ) . "\n";
                }
                // Build links
                return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
        }
        
        private function getDefaultQuery() {
                if ( !isset( $this->mDefaultQuery ) ) {
                        $this->mDefaultQuery = $_GET;
                        unset( $this->mDefaultQuery['title'] );
                        unset( $this->mDefaultQuery['dir'] );
                        unset( $this->mDefaultQuery['offset'] );
                        unset( $this->mDefaultQuery['limit'] );
                        unset( $this->mDefaultQuery['order'] );
                        unset( $this->mDefaultQuery['month'] );
                        unset( $this->mDefaultQuery['year'] );
                }
                return $this->mDefaultQuery;
        }

        /**
         * @param $queryTypes Array
         * @return String: Formatted HTML
         */
        private function getTypeMenu( $queryTypes ) {
                global $wgLogRestrictions, $wgUser;

                $html = "<select name='type'>\n";

                $validTypes = LogPage::validTypes();
                $typesByName = array(); // Temporary array

                // First pass to load the log names
                foreach( $validTypes as $type ) {
                        $text = LogPage::logName( $type );
                        $typesByName[$text] = $type;
                }

                // Second pass to sort by name
                ksort($typesByName);

                // Note the query type
                $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
                // Third pass generates sorted XHTML content
                foreach( $typesByName as $text => $type ) {
                        $selected = ($type == $queryType);
                        // Restricted types
                        if ( isset($wgLogRestrictions[$type]) ) {
                                if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
                                        $html .= Xml::option( $text, $type, $selected ) . "\n";
                                }
                        } else {
                                $html .= Xml::option( $text, $type, $selected ) . "\n";
                        }
                }

                $html .= '</select>';
                return $html;
        }

        /**
         * @param $user String
         * @return String: Formatted HTML
         */
        private function getUserInput( $user ) {
                return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user );
        }

        /**
         * @param $title String
         * @return String: Formatted HTML
         */
        private function getTitleInput( $title ) {
                return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title );
        }

        /**
         * @return boolean Checkbox
         */
        private function getTitlePattern( $pattern ) {
                return '<span style="white-space: nowrap">' .
                        Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
                        '</span>';
        }

        public function beginLogEventsList() {
                return "<ul>\n";
        }

        public function endLogEventsList() {
                return "</ul>\n";
        }

        /**
         * @param $row Row: a single row from the result set
         * @return String: Formatted HTML list item
         */
        public function logLine( $row ) {
                global $wgLang, $wgUser, $wgContLang;

                $title = Title::makeTitle( $row->log_namespace, $row->log_title );
                $classes = array( "mw-logline-{$row->log_type}" );
                $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->log_timestamp), true );
                // User links
                if( self::isDeleted($row,LogPage::DELETED_USER) ) {
                        $userLink = '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
                } else {
                        $userLink = $this->skin->userLink( $row->log_user, $row->user_name ) .
                                $this->skin->userToolLinks( $row->log_user, $row->user_name, true, 0, $row->user_editcount );
                }
                // Comment
                if( self::isDeleted($row,LogPage::DELETED_COMMENT) ) {
                        $comment = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
                } else {
                        $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
                }
                // Extract extra parameters
                $paramArray = LogPage::extractParams( $row->log_params );
                $revert = $del = '';
                // Some user can hide log items and have review links
                if( !($this->flags & self::NO_ACTION_LINK) && $wgUser->isAllowed( 'deleterevision' ) ) {
                        $del = $this->getShowHideLinks( $row ) . ' ';
                }
                // Add review links and such...
                if( ($this->flags & self::NO_ACTION_LINK) || ($row->log_deleted & LogPage::DELETED_ACTION) ) {
                        // Action text is suppressed...
                } else if( self::typeAction($row,'move','move','move') && !empty($paramArray[0]) ) {
                        $destTitle = Title::newFromText( $paramArray[0] );
                        if( $destTitle ) {
                                $revert = '(' . $this->skin->link(
                                        SpecialPage::getTitleFor( 'Movepage' ),
                                        $this->message['revertmove'],
                                        array(),
                                        array(
                                                'wpOldTitle' => $destTitle->getPrefixedDBkey(),
                                                'wpNewTitle' => $title->getPrefixedDBkey(),
                                                'wpReason' => wfMsgForContent( 'revertmove' ),
                                                'wpMovetalk' => 0
                                        ),
                                        array( 'known', 'noclasses' )
                                ) . ')';
                        }
                // Show undelete link
                } else if( self::typeAction($row,array('delete','suppress'),'delete','deletedhistory') ) {
                        if( !$wgUser->isAllowed( 'undelete' ) ) {
                                $viewdeleted = $this->message['undeleteviewlink'];
                        } else {
                                $viewdeleted = $this->message['undeletelink'];
                        }

                        $revert = '(' . $this->skin->link(
                                SpecialPage::getTitleFor( 'Undelete' ),
                                $viewdeleted,
                                array(),
                                array( 'target' => $title->getPrefixedDBkey() ),
                                array( 'known', 'noclasses' )
                         ) . ')';
                // Show unblock/change block link
                } else if( self::typeAction($row,array('block','suppress'),array('block','reblock'),'block') ) {
                        $revert = '(' .
                                $this->skin->link(
                                        SpecialPage::getTitleFor( 'Ipblocklist' ),
                                        $this->message['unblocklink'],
                                        array(),
                                        array(
                                                'action' => 'unblock',
                                                'ip' => $row->log_title
                                        ),
                                        'known'
                                ) .
                                $this->message['pipe-separator'] .
                                $this->skin->link(
                                        SpecialPage::getTitleFor( 'Blockip', $row->log_title ),
                                        $this->message['change-blocklink'],
                                        array(),
                                        array(),
                                        'known'
                                ) .
                                ')';
                // Show change protection link
                } else if( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
                        $revert .= ' (' . 
                                $this->skin->link( $title,
                                        $this->message['hist'],
                                        array(),
                                        array(
                                                'action' => 'history',
                                                'offset' => $row->log_timestamp
                                        )
                                );
                        if( $wgUser->isAllowed( 'protect' ) ) {
                                $revert .= $this->message['pipe-separator'] .
                                        $this->skin->link( $title,
                                                $this->message['protect_change'],
                                                array(),
                                                array( 'action' => 'protect' ),
                                                'known' );
                        }
                        $revert .= ')';
                // Show unmerge link
                } else if( self::typeAction($row,'merge','merge','mergehistory') ) {
                        $merge = SpecialPage::getTitleFor( 'Mergehistory' );
                        $revert = '(' .  $this->skin->link(
                                $merge,
                                $this->message['revertmerge'],
                                array(),
                                array(
                                        'target' => $paramArray[0],
                                        'dest' => $title->getPrefixedDBkey(), 
                                        'mergepoint' => $paramArray[1]
                                ),
                                array( 'known', 'noclasses' )
                        ) . ')';
                // If an edit was hidden from a page give a review link to the history
                } else if( self::typeAction($row,array('delete','suppress'),'revision','deleterevision') ) {
                        if( count($paramArray) >= 2 ) {
                                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                                // Different revision types use different URL params...
                                $key = $paramArray[0];
                                // $paramArray[1] is a CSV of the IDs
                                $Ids = explode( ',', $paramArray[1] );
                                $query = $paramArray[1];
                                $revert = array();
                                // Diff link for single rev deletions
                                if( ( $key === 'oldid' || $key == 'revision' ) && count($Ids) == 1 ) {
                                        $revert[] = $this->skin->link(
                                                $title,
                                                $this->message['diff'], 
                                                array(),
                                                array(
                                                        'diff' => intval( $Ids[0] ),
                                                        'unhide' => 1
                                                ),
                                                array( 'known', 'noclasses' )
                                        );
                                }
                                // View/modify link...
                                $revert[] = $this->skin->link(
                                        $revdel,
                                        $this->message['revdel-restore'],
                                        array(),
                                        array(
                                                'target' => $title->getPrefixedText(),
                                                'type' => $key,
                                                'ids' => $query
                                        ),
                                        array( 'known', 'noclasses' )
                                );
                                // Pipe links
                                $revert = '(' . implode(' | ',$revert) . ')';
                        }
                // Hidden log items, give review link
                } else if( self::typeAction($row,array('delete','suppress'),'event','deleterevision') ) {
                        if( count($paramArray) >= 1 ) {
                                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                                // $paramArray[1] is a CSV of the IDs
                                $Ids = explode( ',', $paramArray[0] );
                                $query = $paramArray[0];
                                // Link to each hidden object ID, $paramArray[1] is the url param
                                $revert = '(' . $this->skin->link(
                                        $revdel,
                                        $this->message['revdel-restore'], 
                                        array(),
                                        array(
                                                'target' => $title->getPrefixedText(),
                                                'type' => 'logging',
                                                'ids' => $query
                                        ),
                                        array( 'known', 'noclasses' )
                                ) . ')';
                        }
                // Self-created users
                } else if( self::typeAction($row,'newusers','create2') ) {
                        if( isset( $paramArray[0] ) ) {
                                $revert = $this->skin->userToolLinks( $paramArray[0], $title->getDBkey(), true );
                        } else {
                                # Fall back to a blue contributions link
                                $revert = $this->skin->userToolLinks( 1, $title->getDBkey() );
                        }
                        if( $time < '20080129000000' ) {
                                # Suppress $comment from old entries (before 2008-01-29),
                                # not needed and can contain incorrect links
                                $comment = '';
                        }
                // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
                } else {
                        wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
                                &$comment, &$revert, $row->log_timestamp ) );
                }
                // Event description
                if( self::isDeleted($row,LogPage::DELETED_ACTION) ) {
                        $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
                } else {
                        $action = LogPage::actionText( $row->log_type, $row->log_action, $title,
                                $this->skin, $paramArray, true );
                }

                // Any tags...
                list($tagDisplay, $newClasses) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
                $classes = array_merge( $classes, $newClasses );

                if( $revert != '' ) {
                        $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
                }

                $time = htmlspecialchars( $time );

                return Xml::tags( 'li', array( "class" => implode( ' ', $classes ) ),
                        $del . $time . ' ' . $userLink . ' ' . $action . ' ' . $comment . ' ' . $revert . " $tagDisplay" ) . "\n";
        }

        /**
         * @param $row Row
         * @return string
         */
        private function getShowHideLinks( $row ) {
                // If event was hidden from sysops
                if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
                        $del = Xml::tags( 'span', array( 'class'=>'mw-revdelundel-link' ),
                                '('.$this->message['rev-delundel'].')' );
                } else if( $row->log_type == 'suppress' ) {
                        $del = ''; // No one should be hiding from the oversight log
                } else {
                        $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
                        $page = Title::makeTitle( $row->log_namespace, $row->log_title );
                        $query = array( 
                                'target' => $target->getPrefixedDBkey(),
                                'type' => 'logging',
                                'ids' => $row->log_id, 
                        );
                        $del = $this->skin->revDeleteLink( $query,
                                self::isDeleted( $row, LogPage::DELETED_RESTRICTED ) );
                }
                return $del;
        }

        /**
         * @param $row Row
         * @param $type Mixed: string/array
         * @param $action Mixed: string/array
         * @param $right string
         * @return bool
         */
        public static function typeAction( $row, $type, $action, $right='' ) {
                $match = is_array($type) ?
                        in_array($row->log_type,$type) : $row->log_type == $type;
                if( $match ) {
                        $match = is_array($action) ?
                                in_array($row->log_action,$action) : $row->log_action == $action;
                        if( $match && $right ) {
                                global $wgUser;
                                $match = $wgUser->isAllowed( $right );
                        }
                }
                return $match;
        }

        /**
         * Determine if the current user is allowed to view a particular
         * field of this log row, if it's marked as deleted.
         * @param $row Row
         * @param $field Integer
         * @return Boolean
         */
        public static function userCan( $row, $field ) {
                if( ( $row->log_deleted & $field ) == $field ) {
                        global $wgUser;
                        $permission = ( $row->log_deleted & LogPage::DELETED_RESTRICTED ) == LogPage::DELETED_RESTRICTED
                                ? 'suppressrevision'
                                : 'deleterevision';
                        wfDebug( "Checking for $permission due to $field match on $row->log_deleted\n" );
                        return $wgUser->isAllowed( $permission );
                } else {
                        return true;
                }
        }

        /**
         * @param $row Row
         * @param $field Integer: one of DELETED_* bitfield constants
         * @return Boolean
         */
        public static function isDeleted( $row, $field ) {
                return ($row->log_deleted & $field) == $field;
        }

        /**
         * Quick function to show a short log extract
         * @param $out OutputPage
         * @param $types String or Array
         * @param $page String
         * @param $user String
         * @param $lim Integer
         * @param $conds Array
         */
        public static function showLogExtract( $out, $types=array(), $page='', $user='', $lim=0, $conds=array() ) {
                global $wgUser;
                # Insert list of top 50 or so items
                $loglist = new LogEventsList( $wgUser->getSkin(), $out, 0 );
                $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
                if( $lim > 0 ) $pager->mLimit = $lim;
                $logBody = $pager->getBody();
                if( $logBody ) {
                        $out->addHTML(
                                $loglist->beginLogEventsList() .
                                $logBody .
                                $loglist->endLogEventsList()
                        );
                } else {
                        $out->addWikiMsg( 'logempty' );
                }
                return $pager->getNumRows();
        }

        /**
         * SQL clause to skip forbidden log types for this user
         * @param $db Database
         * @param $audience string, public/user
         * @return mixed (string or false)
         */
        public static function getExcludeClause( $db, $audience = 'public' ) {
                global $wgLogRestrictions, $wgUser;
                // Reset the array, clears extra "where" clauses when $par is used
                $hiddenLogs = array();
                // Don't show private logs to unprivileged users
                foreach( $wgLogRestrictions as $logType => $right ) {
                        if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
                                $safeType = $db->strencode( $logType );
                                $hiddenLogs[] = $safeType;
                        }
                }
                if( count($hiddenLogs) == 1 ) {
                        return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
                } elseif( $hiddenLogs ) {
                        return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
                }
                return false;
        }
}

/**
 * @ingroup Pager
 */
class LogPager extends ReverseChronologicalPager {
        private $types = array(), $user = '', $title = '', $pattern = '';
        private $typeCGI = '';
        public $mLogEventsList;

        /**
         * constructor
         * @param $list LogEventsList
         * @param $types String or Array
         * @param $user String
         * @param $title String
         * @param $pattern String
         * @param $conds Array
         * @param $year Integer
         * @param $month Integer
         */
        public function __construct( $list, $types = array(), $user = '', $title = '', $pattern = '',
                $conds = array(), $year = false, $month = false, $tagFilter = '' ) 
        {
                parent::__construct();
                $this->mConds = $conds;

                $this->mLogEventsList = $list;

                $this->limitType( $types ); // also excludes hidden types
                $this->limitUser( $user );
                $this->limitTitle( $title, $pattern );
                $this->getDateCond( $year, $month );
                $this->mTagFilter = $tagFilter;
        }

        public function getDefaultQuery() {
                $query = parent::getDefaultQuery();
                $query['type'] = $this->typeCGI; // arrays won't work here
                $query['user'] = $this->user;
                $query['month'] = $this->mMonth;
                $query['year'] = $this->mYear;
                return $query;
        }

        // Call ONLY after calling $this->limitType() already!
        public function getFilterParams() {
                global $wgFilterLogTypes, $wgUser, $wgRequest;
                $filters = array();
                if( count($this->types) ) {
                        return $filters;
                }
                foreach( $wgFilterLogTypes as $type => $default ) {
                        // Avoid silly filtering
                        if( $type !== 'patrol' || $wgUser->useNPPatrol() ) {
                                $hide = $wgRequest->getInt( "hide_{$type}_log", $default );
                                $filters[$type] = $hide;
                                if( $hide )
                                        $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
                        }
                }
                return $filters;
        }

        /**
         * Set the log reader to return only entries of the given type.
         * Type restrictions enforced here
         * @param $types String or array: Log types ('upload', 'delete', etc);
         *   empty string means no restriction
         */
        private function limitType( $types ) {
                global $wgLogRestrictions, $wgUser;
                // If $types is not an array, make it an array
                $types = ($types === '') ? array() : (array)$types;
                // Don't even show header for private logs; don't recognize it...
                foreach ( $types as $type ) {
                        if( isset( $wgLogRestrictions[$type] ) && !$wgUser->isAllowed($wgLogRestrictions[$type]) ) {
                                $types = array_diff( $types, array( $type ) );
                        }
                }
                // Don't show private logs to unprivileged users.
                // Also, only show them upon specific request to avoid suprises.
                $audience = $types ? 'user' : 'public';
                $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
                if( $hideLogs !== false ) {
                        $this->mConds[] = $hideLogs;
                }
                if( count($types) ) {
                        $this->types = $types;
                        $this->mConds['log_type'] = $types;
                        // Set typeCGI; used in url param for paging
                        if( count($types) == 1 ) $this->typeCGI = $types[0];
                }
        }

        /**
         * Set the log reader to return only entries by the given user.
         * @param $name String: (In)valid user name
         */
        private function limitUser( $name ) {
                if( $name == '' ) {
                        return false;
                }
                $usertitle = Title::makeTitleSafe( NS_USER, $name );
                if( is_null($usertitle) ) {
                        return false;
                }
                /* Fetch userid at first, if known, provides awesome query plan afterwards */
                $userid = User::idFromName( $name );
                if( !$userid ) {
                        /* It should be nicer to abort query at all,
                           but for now it won't pass anywhere behind the optimizer */
                        $this->mConds[] = "NULL";
                } else {
                        global $wgUser;
                        $this->mConds['log_user'] = $userid;
                        // Paranoia: avoid brute force searches (bug 17342)
                        if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
                                $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_USER) . ' = 0';
                        }
                        $this->user = $usertitle->getText();
                }
        }

        /**
         * Set the log reader to return only entries affecting the given page.
         * (For the block and rights logs, this is a user page.)
         * @param $page String: Title name as text
         * @param $pattern String
         */
        private function limitTitle( $page, $pattern ) {
                global $wgMiserMode, $wgUser;

                $title = Title::newFromText( $page );
                if( strlen($page) == 0 || !$title instanceof Title )
                        return false;

                $this->title = $title->getPrefixedText();
                $ns = $title->getNamespace();
                # Using the (log_namespace, log_title, log_timestamp) index with a
                # range scan (LIKE) on the first two parts, instead of simple equality,
                # makes it unusable for sorting.  Sorted retrieval using another index
                # would be possible, but then we might have to scan arbitrarily many
                # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
                # is on.
                #
                # This is not a problem with simple title matches, because then we can
                # use the page_time index.  That should have no more than a few hundred
                # log entries for even the busiest pages, so it can be safely scanned
                # in full to satisfy an impossible condition on user or similar.
                if( $pattern && !$wgMiserMode ) {
                        # use escapeLike to avoid expensive search patterns like 't%st%'
                        $safetitle = $this->mDb->escapeLike( $title->getDBkey() );
                        $this->mConds['log_namespace'] = $ns;
                        $this->mConds[] = "log_title LIKE '$safetitle%'";
                        $this->pattern = $pattern;
                } else {
                        $this->mConds['log_namespace'] = $ns;
                        $this->mConds['log_title'] = $title->getDBkey();
                }
                // Paranoia: avoid brute force searches (bug 17342)
                if( !$wgUser->isAllowed( 'suppressrevision' ) ) {
                        $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_ACTION) . ' = 0';
                }
        }

        public function getQueryInfo() {
                $tables = array( 'logging', 'user' );
                $this->mConds[] = 'user_id = log_user';
                $groupBy = false;
                # Add log_search table if there are conditions on it
                if( array_key_exists('ls_field',$this->mConds) ) {
                        $tables[] = 'log_search';
                        $index = array( 'log_search' => 'ls_field_val', 'logging' => 'PRIMARY' );
                        $groupBy = 'ls_log_id';
                # Don't use the wrong logging index
                } else if( $this->title || $this->pattern || $this->user ) {
                        $index = array( 'logging' => array('page_time','user_time') );
                } else if( $this->types ) {
                        $index = array( 'logging' => 'type_time' );
                } else {
                        $index = array( 'logging' => 'times' );
                }
                $options = array( 'USE INDEX' => $index );
                # Don't show duplicate rows when using log_search
                if( $groupBy ) $options['GROUP BY'] = $groupBy;
                $info = array(
                        'tables'     => $tables,
                        'fields'     => array( 'log_type', 'log_action', 'log_user', 'log_namespace',
                                'log_title', 'log_params', 'log_comment', 'log_id', 'log_deleted',
                                'log_timestamp', 'user_name', 'user_editcount' ),
                        'conds'      => $this->mConds,
                        'options'    => $options,
                        'join_conds' => array( 
                                'user' => array( 'INNER JOIN', 'user_id=log_user' ),
                                'log_search' => array( 'INNER JOIN', 'ls_log_id=log_id' )
                        )
                );
                # Add ChangeTags filter query
                ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
                        $info['join_conds'], $info['options'], $this->mTagFilter );

                return $info;
        }

        function getIndexField() {
                return 'log_timestamp';
        }

        public function getStartBody() {
                wfProfileIn( __METHOD__ );
                # Do a link batch query
                if( $this->getNumRows() > 0 ) {
                        $lb = new LinkBatch;
                        while( $row = $this->mResult->fetchObject() ) {
                                $lb->add( $row->log_namespace, $row->log_title );
                                $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
                                $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
                        }
                        $lb->execute();
                        $this->mResult->seek( 0 );
                }
                wfProfileOut( __METHOD__ );
                return '';
        }

        public function formatRow( $row ) {
                return $this->mLogEventsList->logLine( $row );
        }

        public function getType() {
                return $this->types;
        }

        public function getUser() {
                return $this->user;
        }

        public function getPage() {
                return $this->title;
        }

        public function getPattern() {
                return $this->pattern;
        }

        public function getYear() {
                return $this->mYear;
        }

        public function getMonth() {
                return $this->mMonth;
        }

        public function getTagFilter() {
                return $this->mTagFilter;
        }

        public function doQuery() {
                // Workaround MySQL optimizer bug
                $this->mDb->setBigSelects();
                parent::doQuery();
                $this->mDb->setBigSelects( 'default' );
        }
}

/**
 * @deprecated
 * @ingroup SpecialPage
 */
class LogReader {
        var $pager;
        /**
         * @param $request WebRequest: for internal use use a FauxRequest object to pass arbitrary parameters.
         */
        function __construct( $request ) {
                global $wgUser, $wgOut;
                wfDeprecated(__METHOD__);
                # Get parameters
                $type = $request->getVal( 'type' );
                $user = $request->getText( 'user' );
                $title = $request->getText( 'page' );
                $pattern = $request->getBool( 'pattern' );
                $year = $request->getIntOrNull( 'year' );
                $month = $request->getIntOrNull( 'month' );
                $tagFilter = $request->getVal( 'tagfilter' );
                # Don't let the user get stuck with a certain date
                $skip = $request->getText( 'offset' ) || $request->getText( 'dir' ) == 'prev';
                if( $skip ) {
                        $year = '';
                        $month = '';
                }
                # Use new list class to output results
                $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, 0 );
                $this->pager = new LogPager( $loglist, $type, $user, $title, $pattern, $year, $month, $tagFilter );
        }

        /**
        * Is there at least one row?
        * @return bool
        */
        public function hasRows() {
                return isset($this->pager) ? ($this->pager->getNumRows() > 0) : false;
        }
}

/**
 * @deprecated
 * @ingroup SpecialPage
 */
class LogViewer {
        const NO_ACTION_LINK = 1;

        /**
         * LogReader object
         */
        var $reader;

        /**
         * @param &$reader LogReader: where to get our data from
         * @param $flags Integer: Bitwise combination of flags:
         *     LogEventsList::NO_ACTION_LINK   Don't show restore/unblock/block links
         */
        function __construct( &$reader, $flags = 0 ) {
                wfDeprecated(__METHOD__);
                $this->reader =& $reader;
                $this->reader->pager->mLogEventsList->flags = $flags;
                # Aliases for shorter code...
                $this->pager =& $this->reader->pager;
                $this->list =& $this->reader->pager->mLogEventsList;
        }

        /**
         * Take over the whole output page in $wgOut with the log display.
         */
        public function show() {
                # Set title and add header
                $this->list->showHeader( $pager->getType() );
                # Show form options
                $this->list->showOptions( $this->pager->getType(), $this->pager->getUser(), $this->pager->getPage(),
                        $this->pager->getPattern(), $this->pager->getYear(), $this->pager->getMonth() );
                # Insert list
                $logBody = $this->pager->getBody();
                if( $logBody ) {
                        $wgOut->addHTML(
                                $this->pager->getNavigationBar() .
                                $this->list->beginLogEventsList() .
                                $logBody .
                                $this->list->endLogEventsList() .
                                $this->pager->getNavigationBar()
                        );
                } else {
                        $wgOut->addWikiMsg( 'logempty' );
                }
        }

        /**
         * Output just the list of entries given by the linked LogReader,
         * with extraneous UI elements. Use for displaying log fragments in
         * another page (eg at Special:Undelete)
         * @param $out OutputPage: where to send output
         */
        public function showList( &$out ) {
                $logBody = $this->pager->getBody();
                if( $logBody ) {
                        $out->addHTML(
                                $this->list->beginLogEventsList() .
                                $logBody .
                                $this->list->endLogEventsList()
                        );
                } else {
                        $out->addWikiMsg( 'logempty' );
                }
        }
}