LogEventsList.php

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<?php
class LogEventsList {
        const NO_ACTION_LINK = 1;
        const NO_EXTRA_USER_LINKS = 2;

        private $skin;

        private $out;
        public $flags;

        protected $message;

        protected $mDefaultQuery;

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

        private function preCacheMessages() {
                // Precache various messages
                if( !isset( $this->message ) ) {
                        $messages = array( 'revertmerge', 'protect_change', 'unblocklink', 'change-blocklink',
                                'revertmove', 'undeletelink', 'undeleteviewlink', 'revdel-restore', 'hist', 'diff',
                                'pipe-separator', 'revdel-restore-deleted', 'revdel-restore-visible' );
                        foreach( $messages as $msg ) {
                                $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
                        }
                }
        }

        public function showHeader( $type ) {
                wfDeprecated( __METHOD__, '1.19' );
                // If only one log type is used, then show a special message...
                $headerType = (count($type) == 1) ? $type[0] : '';
                if( LogPage::isLogType( $headerType ) ) {
                        $page = new LogPage( $headerType );
                        $this->out->setPageTitle( $page->getName()->text() );
                        $this->out->addHTML( $page->getDescription()->parseAsBlock() );
                } else {
                        $this->out->addHTML( wfMsgExt('alllogstext',array('parseinline')) );
                }
        }

        public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='',
                $month = '', $filter = null, $tagFilter='' ) {
                global $wgScript, $wgMiserMode;

                $action = $wgScript;
                $title = SpecialPage::getTitleFor( 'Log' );
                $special = $title->getPrefixedDBkey();

                // For B/C, we take strings, but make sure they are converted...
                $types = ($types === '') ? array() : (array)$types;

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

                $html = Html::hidden( 'title', $special );

                // Basic selectors
                $html .= $this->getTypeMenu( $types ) . "\n";
                $html .= $this->getUserInput( $user ) . "\n";
                $html .= $this->getTitleInput( $page ) . "\n";
                $html .= $this->getExtraInputs( $types ) . "\n";

                // Title pattern, if allowed
                if (!$wgMiserMode) {
                        $html .= $this->getTitlePattern( $pattern ) . "\n";
                }

                // date menu
                $html .= Xml::tags( 'p', null, Xml::dateMenu( $year, $month ) );

                // Tag filter
                if ($tagSelector) {
                        $html .= Xml::tags( 'p', null, implode( '&#160;', $tagSelector ) );
                }

                // Filter links
                if ($filter) {
                        $html .= Xml::tags( 'p', null, $this->getFilterLinks( $filter ) );
                }

                // Submit button
                $html .= Xml::submitButton( wfMsg( 'allpagessubmit' ) );

                // Fieldset
                $html = Xml::fieldset( wfMsg( 'log' ), $html );

                // Form wrapping
                $html = Xml::tags( 'form', array( 'action' => $action, 'method' => 'get' ), $html );

                $this->out->addHTML( $html );
        }

        private function getFilterLinks( $filter ) {
                global $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 = Linker::link(
                                $this->getDisplayTitle(),
                                $messages[$hideVal],
                                array(),
                                $query,
                                array( 'known', 'noclasses' )
                        );

                        $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
                        $hiddens .= Html::hidden( "hide_{$type}_log", $val ) . "\n";
                }
                // Build links
                return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
        }

        private function getDefaultQuery() {
                global $wgRequest;

                if ( !isset( $this->mDefaultQuery ) ) {
                        $this->mDefaultQuery = $wgRequest->getQueryValues();
                        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;
        }

        public function getDisplayTitle() {
                return $this->out->getTitle();
        }

        public function getContext() {
                return $this->out->getContext();
        }

        private function getTypeMenu( $queryTypes ) {
                $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
                $selector = $this->getTypeSelector();
                $selector->setDefault( $queryType );
                return $selector->getHtml();
        }

        public function getTypeSelector() {
                global $wgUser;

                $typesByName = array(); // Temporary array
                // First pass to load the log names
                foreach(  LogPage::validTypes() as $type ) {
                        $page = new LogPage( $type );
                        $restriction = $page->getRestriction();
                        if ( $wgUser->isAllowed( $restriction ) ) {
                                $typesByName[$type] = $page->getName()->text();
                        }
                }

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

                // Always put "All public logs" on top
                $public = $typesByName[''];
                unset( $typesByName[''] );
                $typesByName = array( '' => $public ) + $typesByName;

                $select = new XmlSelect( 'type' );
                foreach( $typesByName as $type => $name ) {
                        $select->addOption( $name, $type );
                }

                return $select;
        }

        private function getUserInput( $user ) {
                return '<span style="white-space: nowrap">' .
                        Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user ) .
                        '</span>';
        }

        private function getTitleInput( $title ) {
                return '<span style="white-space: nowrap">' .
                        Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title ) .
                        '</span>';
        }

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

        private function getExtraInputs( $types ) {
                global $wgRequest;
                $offender = $wgRequest->getVal('offender');
                $user = User::newFromName( $offender, false );
                if( !$user || ($user->getId() == 0 && !IP::isIPAddress($offender) ) ) {
                        $offender = ''; // Blank field if invalid
                }
                if( count($types) == 1 && $types[0] == 'suppress' ) {
                        return Xml::inputLabel( wfMsg('revdelete-offender'), 'offender',
                                'mw-log-offender', 20, $offender );
                }
                return '';
        }

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

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

        public function logLine( $row ) {
                $entry = DatabaseLogEntry::newFromRow( $row );
                $formatter = LogFormatter::newFromEntry( $entry );
                $formatter->setShowUserToolLinks( !( $this->flags & self::NO_EXTRA_USER_LINKS ) );

                $action = $formatter->getActionText();
                $comment = $formatter->getComment();

                $classes = array( 'mw-logline-' . $entry->getType() );
                $title = $entry->getTarget();
                $time = $this->logTimestamp( $entry );

                // Extract extra parameters
                $paramArray = LogPage::extractParams( $row->log_params );
                // Add review/revert links and such...
                $revert = $this->logActionLinks( $row, $title, $paramArray, $comment );

                // Some user can hide log items and have review links
                $del = $this->getShowHideLinks( $row );
                if( $del != '' ) $del .= ' ';

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

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

        private function logTimestamp( LogEntry $entry ) {
                global $wgLang;
                $time = $wgLang->timeanddate( wfTimestamp( TS_MW, $entry->getTimestamp() ), true );
                return htmlspecialchars( $time );
        }

        private function logActionLinks( $row, $title, $paramArray, &$comment ) {
                global $wgUser;
                if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the action
                        || self::isDeleted( $row, LogPage::DELETED_ACTION ) ) // action is hidden
                {
                        return '';
                }
                $revert = '';
                if( self::typeAction( $row, 'move', 'move', 'move' ) && !empty( $paramArray[0] ) ) {
                        $destTitle = Title::newFromText( $paramArray[0] );
                        if( $destTitle ) {
                                $revert = '(' . Linker::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
                } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'delete', 'deletedhistory' ) ) {
                        if( !$wgUser->isAllowed( 'undelete' ) ) {
                                $viewdeleted = $this->message['undeleteviewlink'];
                        } else {
                                $viewdeleted = $this->message['undeletelink'];
                        }
                        $revert = '(' . Linker::link(
                                SpecialPage::getTitleFor( 'Undelete' ),
                                $viewdeleted,
                                array(),
                                array( 'target' => $title->getPrefixedDBkey() ),
                                array( 'known', 'noclasses' )
                         ) . ')';
                // Show unblock/change block link
                } elseif( self::typeAction( $row, array( 'block', 'suppress' ), array( 'block', 'reblock' ), 'block' ) ) {
                        $revert = '(' .
                                Linker::link(
                                        SpecialPage::getTitleFor( 'Unblock', $row->log_title ),
                                        $this->message['unblocklink'],
                                        array(),
                                        array(),
                                        'known'
                                ) .
                                $this->message['pipe-separator'] .
                                Linker::link(
                                        SpecialPage::getTitleFor( 'Block', $row->log_title ),
                                        $this->message['change-blocklink'],
                                        array(),
                                        array(),
                                        'known'
                                ) .
                                ')';
                // Show change protection link
                } elseif( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
                        $revert .= ' (' .
                                Linker::link( $title,
                                        $this->message['hist'],
                                        array(),
                                        array(
                                                'action' => 'history',
                                                'offset' => $row->log_timestamp
                                        )
                                );
                        if( $wgUser->isAllowed( 'protect' ) ) {
                                $revert .= $this->message['pipe-separator'] .
                                        Linker::link( $title,
                                                $this->message['protect_change'],
                                                array(),
                                                array( 'action' => 'protect' ),
                                                'known' );
                        }
                        $revert .= ')';
                // Show unmerge link
                } elseif( self::typeAction( $row, 'merge', 'merge', 'mergehistory' ) ) {
                        $revert = '(' . Linker::link(
                                SpecialPage::getTitleFor( 'MergeHistory' ),
                                $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
                } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'revision', 'deletedhistory' ) ) {
                        $revert = RevisionDeleter::getLogLinks( $title, $paramArray,
                                                                $this->message );
                // Hidden log items, give review link
                } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'event', 'deletedhistory' ) ) {
                        if( count($paramArray) >= 1 ) {
                                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                                // $paramArray[1] is a CSV of the IDs
                                $query = $paramArray[0];
                                // Link to each hidden object ID, $paramArray[1] is the url param
                                $revert = '(' . Linker::link(
                                        $revdel,
                                        $this->message['revdel-restore'],
                                        array(),
                                        array(
                                                'target' => $title->getPrefixedText(),
                                                'type' => 'logging',
                                                'ids' => $query
                                        ),
                                        array( 'known', 'noclasses' )
                                ) . ')';
                        }
                // 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 ) );
                }
                if( $revert != '' ) {
                        $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
                }
                return $revert;
        }

        private function getShowHideLinks( $row ) {
                global $wgUser;
                if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the links
                        || $row->log_type == 'suppress' ) { // no one can hide items from the suppress log
                        return '';
                }
                $del = '';
                // Don't show useless link to people who cannot hide revisions
                if( $wgUser->isAllowed( 'deletedhistory' ) ) {
                        if( $row->log_deleted || $wgUser->isAllowed( 'deleterevision' ) ) {
                                $canHide = $wgUser->isAllowed( 'deleterevision' );
                                // If event was hidden from sysops
                                if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
                                        $del = Linker::revDeleteLinkDisabled( $canHide );
                                } else {
                                        $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
                                        $query = array(
                                                'target' => $target->getPrefixedDBkey(),
                                                'type'   => 'logging',
                                                'ids'    => $row->log_id,
                                        );
                                        $del = Linker::revDeleteLink( $query,
                                                self::isDeleted( $row, LogPage::DELETED_RESTRICTED ), $canHide );
                                }
                        }
                }
                return $del;
        }

        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;
        }

        public static function userCan( $row, $field, User $user = null ) {
                return self::userCanBitfield( $row->log_deleted, $field, $user );
        }

        public static function userCanBitfield( $bitfield, $field, User $user = null ) {
                if( $bitfield & $field ) {
                        if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
                                $permission = 'suppressrevision';
                        } else {
                                $permission = 'deletedhistory';
                        }
                        wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
                        if ( $user === null ) {
                                global $wgUser;
                                $user = $wgUser;
                        }
                        return $user->isAllowed( $permission );
                } else {
                        return true;
                }
        }

        public static function isDeleted( $row, $field ) {
                return ( $row->log_deleted & $field ) == $field;
        }

        public static function showLogExtract(
                &$out, $types=array(), $page='', $user='', $param = array()
        ) {
                $defaultParameters = array(
                        'lim' => 25,
                        'conds' => array(),
                        'showIfEmpty' => true,
                        'msgKey' => array(''),
                        'wrap' => "$1",
                        'flags' => 0
                );
                # The + operator appends elements of remaining keys from the right
                # handed array to the left handed, whereas duplicated keys are NOT overwritten.
                $param += $defaultParameters;
                # Convert $param array to individual variables
                $lim = $param['lim'];
                $conds = $param['conds'];
                $showIfEmpty = $param['showIfEmpty'];
                $msgKey = $param['msgKey'];
                $wrap = $param['wrap'];
                $flags = $param['flags'];
                if ( !is_array( $msgKey ) ) {
                        $msgKey = array( $msgKey );
                }

                if ( $out instanceof OutputPage ) {
                        $context = $out->getContext();
                } else {
                        $context = RequestContext::getMain();
                }

                # Insert list of top 50 (or top $lim) items
                $loglist = new LogEventsList( $context->getSkin(), $context->getOutput(), $flags );
                $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
                if ( isset( $param['offset'] ) ) { # Tell pager to ignore $wgRequest offset
                        $pager->setOffset( $param['offset'] );
                }
                if( $lim > 0 ) $pager->mLimit = $lim;
                $logBody = $pager->getBody();
                $s = '';
                if( $logBody ) {
                        if ( $msgKey[0] ) {
                                $s = '<div class="mw-warning-with-logexcerpt">';

                                if ( count( $msgKey ) == 1 ) {
                                        $s .= wfMsgExt( $msgKey[0], array( 'parse' ) );
                                } else { // Process additional arguments
                                        $args = $msgKey;
                                        array_shift( $args );
                                        $s .= wfMsgExt( $msgKey[0], array( 'parse' ), $args );
                                }
                        }
                        $s .= $loglist->beginLogEventsList() .
                                 $logBody .
                                 $loglist->endLogEventsList();
                } else {
                        if ( $showIfEmpty ) {
                                $s = Html::rawElement( 'div', array( 'class' => 'mw-warning-logempty' ),
                                        wfMsgExt( 'logempty', array( 'parseinline' ) ) );
                        }
                }
                if( $pager->getNumRows() > $pager->mLimit ) { # Show "Full log" link
                        $urlParam = array();
                        if ( $page instanceof Title ) {
                                $urlParam['page'] = $page->getPrefixedDBkey();
                        } elseif ( $page != '' ) {
                                $urlParam['page'] = $page;
                        }
                        if ( $user != '')
                                $urlParam['user'] = $user;
                        if ( !is_array( $types ) ) # Make it an array, if it isn't
                                $types = array( $types );
                        # If there is exactly one log type, we can link to Special:Log?type=foo
                        if ( count( $types ) == 1 )
                                $urlParam['type'] = $types[0];
                        $s .= Linker::link(
                                SpecialPage::getTitleFor( 'Log' ),
                                wfMsgHtml( 'log-fulllog' ),
                                array(),
                                $urlParam
                        );
                }
                if ( $logBody && $msgKey[0] ) {
                        $s .= '</div>';
                }

                if ( $wrap != '' ) { // Wrap message in html
                        $s = str_replace( '$1', $s, $wrap );
                }

                /* hook can return false, if we don't want the message to be emitted (Wikia BugId:7093) */
                if ( wfRunHooks( 'LogEventsListShowLogExtract', array( &$s, $types, $page, $user, $param ) ) ) {
                        // $out can be either an OutputPage object or a String-by-reference
                        if ( $out instanceof OutputPage ){
                                $out->addHTML( $s );
                        } else {
                                $out = $s;
                        }
                }

                return $pager->getNumRows();
        }

        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;
        }
 }