HistoryPager.php

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<?php
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\Watchlist\WatchlistManager;
 
class HistoryPager extends ReverseChronologicalPager {
    public $lastRow = false;
 
    public $counter, $historyPage, $buttons, $conds;
 
    protected $oldIdChecked;
 
    protected $preventClickjacking = false;
    protected $parentLens;
 
    protected $showTagEditUI;
 
    private $tagFilter;
 
    private $revisionStore;
 
    private $watchlistManager;
 
    private $linkBatchFactory;
 
    public function __construct(
        HistoryAction $historyPage,
        $year = '',
        $month = '',
        $tagFilter = '',
        array $conds = [],
        $day = '',
        LinkBatchFactory $linkBatchFactory = null,
        WatchlistManager $watchlistManager = null
    ) {
        parent::__construct( $historyPage->getContext() );
        $this->historyPage = $historyPage;
        $this->tagFilter = $tagFilter;
        $this->getDateCond( $year, $month, $day );
        $this->conds = $conds;
        $this->showTagEditUI = ChangeTags::showTagEditingUI( $this->getAuthority() );
        $services = MediaWikiServices::getInstance();
        $this->revisionStore = $services->getRevisionStore();
        $this->linkBatchFactory = $linkBatchFactory ?? $services->getLinkBatchFactory();
        $this->watchlistManager = $watchlistManager
            ?? $services->getWatchlistManager();
    }
 
    // For hook compatibility...
    public function getArticle() {
        return $this->historyPage->getArticle();
    }
 
    protected function getSqlComment() {
        if ( $this->conds ) {
            return 'history page filtered'; // potentially slow, see CR r58153
        } else {
            return 'history page unfiltered';
        }
    }
 
    public function getQueryInfo() {
        $revQuery = $this->revisionStore->getQueryInfo( [ 'user' ] );
        // T270033 Index renaming
        $revIndex = $this->mDb->indexExists( 'revision', 'page_timestamp',  __METHOD__ )
            ? 'page_timestamp'
            : 'rev_page_timestamp';
 
        $queryInfo = [
            'tables' => $revQuery['tables'],
            'fields' => $revQuery['fields'],
            'conds' => array_merge(
                [ 'rev_page' => $this->getWikiPage()->getId() ],
                $this->conds ),
            'options' => [ 'USE INDEX' => [ 'revision' => $revIndex ] ],
            'join_conds' => $revQuery['joins'],
        ];
        ChangeTags::modifyDisplayQuery(
            $queryInfo['tables'],
            $queryInfo['fields'],
            $queryInfo['conds'],
            $queryInfo['join_conds'],
            $queryInfo['options'],
            $this->tagFilter
        );
 
        $this->getHookRunner()->onPageHistoryPager__getQueryInfo( $this, $queryInfo );
 
        return $queryInfo;
    }
 
    public function getIndexField() {
        return [ [ 'rev_timestamp', 'rev_id' ] ];
    }
 
    public function formatRow( $row ) {
        if ( $this->lastRow ) {
            $firstInList = $this->counter == 1;
            $this->counter++;
 
            $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
                ? $this->watchlistManager
                    ->getTitleNotificationTimestamp( $this->getUser(), $this->getTitle() )
                : false;
 
            $s = $this->historyLine( $this->lastRow, $row, $notifTimestamp, false, $firstInList );
        } else {
            $s = '';
        }
        $this->lastRow = $row;
 
        return $s;
    }
 
    protected function doBatchLookups() {
        if ( !$this->getHookRunner()->onPageHistoryPager__doBatchLookups( $this, $this->mResult ) ) {
            return;
        }
 
        # Do a link batch query
        $this->mResult->seek( 0 );
        $batch = $this->linkBatchFactory->newLinkBatch();
        $revIds = [];
        foreach ( $this->mResult as $row ) {
            if ( $row->rev_parent_id ) {
                $revIds[] = $row->rev_parent_id;
            }
            if ( $row->user_name !== null ) {
                $batch->add( NS_USER, $row->user_name );
                $batch->add( NS_USER_TALK, $row->user_name );
            } else { # for anons or usernames of imported revisions
                $batch->add( NS_USER, $row->rev_user_text );
                $batch->add( NS_USER_TALK, $row->rev_user_text );
            }
        }
        $this->parentLens = $this->revisionStore->getRevisionSizes( $revIds );
        $batch->execute();
        $this->mResult->seek( 0 );
    }
 
    protected function getEmptyBody() {
        return $this->msg( 'history-empty' )->escaped();
    }
 
    protected function getStartBody() {
        $this->lastRow = false;
        $this->counter = 1;
        $this->oldIdChecked = 0;
        $s = '';
        // Button container stored in $this->buttons for re-use in getEndBody()
        $this->buttons = '';
        if ( $this->getNumRows() > 0 ) {
            $this->getOutput()->wrapWikiMsg( "<div class='mw-history-legend'>\n$1\n</div>", 'histlegend' );
            $s = Html::openElement( 'form', [
                'action' => wfScript(),
                'id' => 'mw-history-compare'
            ] ) . "\n";
            $s .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) . "\n";
            $s .= Html::hidden( 'action', 'historysubmit' ) . "\n";
            $s .= Html::hidden( 'type', 'revision' ) . "\n";
 
            $this->buttons .= Html::openElement(
                'div', [ 'class' => 'mw-history-compareselectedversions' ] );
            $className = 'historysubmit mw-history-compareselectedversions-button mw-ui-button';
            $attrs = [ 'class' => $className ]
                + Linker::tooltipAndAccesskeyAttribs( 'compareselectedversions' );
            $this->buttons .= $this->submitButton( $this->msg( 'compareselectedversions' )->text(),
                $attrs
            ) . "\n";
 
            $actionButtons = '';
            if ( $this->getAuthority()->isAllowed( 'deleterevision' ) ) {
                $actionButtons .= $this->getRevisionButton(
                    'revisiondelete', 'showhideselectedversions' );
            }
            if ( $this->showTagEditUI ) {
                $actionButtons .= $this->getRevisionButton(
                    'editchangetags', 'history-edit-tags' );
            }
            if ( $actionButtons ) {
                $this->buttons .= Xml::tags( 'div', [ 'class' =>
                    'mw-history-revisionactions' ], $actionButtons );
            }
 
            if ( $this->getAuthority()->isAllowed( 'deleterevision' ) || $this->showTagEditUI ) {
                $this->buttons .= ( new ListToggle( $this->getOutput() ) )->getHTML();
            }
 
            $this->buttons .= '</div>';
 
            $s .= $this->buttons;
            $s .= '<ul id="pagehistory">' . "\n";
        }
 
        return $s;
    }
 
    private function getRevisionButton( $name, $msg ) {
        $this->preventClickjacking();
        $element = Html::element(
            'button',
            [
                'type' => 'submit',
                'name' => $name,
                'value' => '1',
                'class' => "historysubmit mw-history-$name-button mw-ui-button",
            ],
            $this->msg( $msg )->text()
        ) . "\n";
        return $element;
    }
 
    protected function getEndBody() {
        if ( $this->getNumRows() == 0 ) {
            return '';
        }
 
        if ( $this->lastRow ) {
            $firstInList = $this->counter == 1;
            if ( $this->mIsBackwards ) {
                # Next row is unknown, but for UI reasons, probably exists if an offset has been specified
                if ( $this->mOffset == '' ) {
                    $next = null;
                } else {
                    $next = 'unknown';
                }
            } else {
                # The next row is the past-the-end row
                $next = $this->mPastTheEndRow;
            }
            $this->counter++;
 
            $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
                ? $this->watchlistManager
                    ->getTitleNotificationTimestamp( $this->getUser(), $this->getTitle() )
                : false;
 
            $s = $this->historyLine( $this->lastRow, $next, $notifTimestamp, false, $firstInList );
        } else {
            $s = '';
        }
        $s .= "</ul>\n";
        # Add second buttons only if there is more than one rev
        if ( $this->getNumRows() > 2 ) {
            $s .= $this->buttons;
        }
        $s .= '</form>';
        return $s;
    }
 
    private function submitButton( $message, $attributes = [] ) {
        # Disable submit button if history has 1 revision only
        if ( $this->getNumRows() > 1 ) {
            return Html::submitButton( $message, $attributes );
        } else {
            return '';
        }
    }
 
    private function historyLine( $row, $next, $notificationtimestamp = false,
        $dummy = false, $firstInList = false ) {
        $revRecord = $this->revisionStore->newRevisionFromRow(
            $row,
            RevisionStore::READ_NORMAL,
            $this->getTitle()
        );
 
        if ( is_object( $next ) ) {
            $previousRevRecord = $this->revisionStore->newRevisionFromRow(
                $next,
                RevisionStore::READ_NORMAL,
                $this->getTitle()
            );
        } else {
            $previousRevRecord = null;
        }
 
        $latest = $revRecord->getId() === $this->getWikiPage()->getLatest();
        $curlink = $this->curLink( $revRecord );
        $lastlink = $this->lastLink( $revRecord, $next );
        $curLastlinks = Html::rawElement( 'span', [], $curlink ) .
            Html::rawElement( 'span', [], $lastlink );
        $histLinks = Html::rawElement(
            'span',
            [ 'class' => 'mw-history-histlinks mw-changeslist-links' ],
            $curLastlinks
        );
 
        $diffButtons = $this->diffButtons( $revRecord, $firstInList );
        $s = $histLinks . $diffButtons;
 
        $link = $this->revLink( $revRecord );
        $classes = [];
 
        $del = '';
        $user = $this->getUser();
        $canRevDelete = $this->getAuthority()->isAllowed( 'deleterevision' );
        // Show checkboxes for each revision, to allow for revision deletion and
        // change tags
        $visibility = $revRecord->getVisibility();
        if ( $canRevDelete || $this->showTagEditUI ) {
            $this->preventClickjacking();
            // If revision was hidden from sysops and we don't need the checkbox
            // for anything else, disable it
            if ( !$this->showTagEditUI
                && !$revRecord->userCan( RevisionRecord::DELETED_RESTRICTED, $this->getAuthority() )
            ) {
                $del = Xml::check( 'deleterevisions', false, [ 'disabled' => 'disabled' ] );
            // Otherwise, enable the checkbox...
            } else {
                $del = Xml::check( 'showhiderevisions', false,
                    [ 'name' => 'ids[' . $revRecord->getId() . ']' ] );
            }
        // User can only view deleted revisions...
        } elseif ( $revRecord->getVisibility() && $this->getAuthority()->isAllowed( 'deletedhistory' ) ) {
            // If revision was hidden from sysops, disable the link
            if ( !$revRecord->userCan( RevisionRecord::DELETED_RESTRICTED, $this->getAuthority() ) ) {
                $del = Linker::revDeleteLinkDisabled( false );
            // Otherwise, show the link...
            } else {
                $query = [
                    'type' => 'revision',
                    'target' => $this->getTitle()->getPrefixedDBkey(),
                    'ids' => $revRecord->getId()
                ];
                $del .= Linker::revDeleteLink(
                    $query,
                    $revRecord->isDeleted( RevisionRecord::DELETED_RESTRICTED ),
                    false
                );
            }
        }
        if ( $del ) {
            $s .= " $del ";
        }
 
        $lang = $this->getLanguage();
        $dirmark = $lang->getDirMark();
 
        $s .= " $link";
        $s .= $dirmark;
        $s .= " <span class='history-user'>" .
            Linker::revUserTools( $revRecord, true, false ) . "</span>";
        $s .= $dirmark;
 
        if ( $revRecord->isMinor() ) {
            $s .= ' ' . ChangesList::flag( 'minor', $this->getContext() );
        }
 
        # Sometimes rev_len isn't populated
        if ( $revRecord->getSize() !== null ) {
            # Size is always public data
            $prevSize = $this->parentLens[$row->rev_parent_id] ?? 0;
            $sDiff = ChangesList::showCharacterDifference( $prevSize, $revRecord->getSize() );
            $fSize = Linker::formatRevisionSize( $revRecord->getSize() );
            $s .= ' <span class="mw-changeslist-separator"></span> ' . "$fSize $sDiff";
        }
 
        # Text following the character difference is added just before running hooks
        $s2 = Linker::revComment( $revRecord, false, true, false );
 
        if ( $notificationtimestamp && ( $row->rev_timestamp >= $notificationtimestamp ) ) {
            $s2 .= ' <span class="updatedmarker">' . $this->msg( 'updatedmarker' )->escaped() . '</span>';
            $classes[] = 'mw-history-line-updated';
        }
 
        $tools = [];
 
        # Rollback and undo links
 
        if ( $previousRevRecord && $this->getAuthority()->probablyCan( 'edit', $this->getTitle() ) ) {
            if ( $latest && $this->getAuthority()->probablyCan( 'rollback', $this->getTitle() )
            ) {
                // Get a rollback link without the brackets
                $rollbackLink = Linker::generateRollback(
                    $revRecord,
                    $this->getContext(),
                    [ 'verify', 'noBrackets' ]
                );
                if ( $rollbackLink ) {
                    $this->preventClickjacking();
                    $tools[] = $rollbackLink;
                }
            }
 
            if ( !$revRecord->isDeleted( RevisionRecord::DELETED_TEXT )
                && !$previousRevRecord->isDeleted( RevisionRecord::DELETED_TEXT )
            ) {
                # Create undo tooltip for the first (=latest) line only
                $undoTooltip = $latest
                    ? [ 'title' => $this->msg( 'tooltip-undo' )->text() ]
                    : [];
                $undolink = $this->getLinkRenderer()->makeKnownLink(
                    $this->getTitle(),
                    $this->msg( 'editundo' )->text(),
                    $undoTooltip,
                    [
                        'action' => 'edit',
                        'undoafter' => $previousRevRecord->getId(),
                        'undo' => $revRecord->getId()
                    ]
                );
                $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
            }
        }
        // Allow extension to add their own links here
        $this->getHookRunner()->onHistoryTools(
            $revRecord,
            $tools,
            $previousRevRecord,
            $user
        );
 
        if ( $tools ) {
            $s2 .= ' ' . Html::openElement( 'span', [ 'class' => 'mw-changeslist-links' ] );
            foreach ( $tools as $tool ) {
                $s2 .= Html::rawElement( 'span', [], $tool );
            }
            $s2 .= Html::closeElement( 'span' );
        }
 
        # Tags
        list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
            $row->ts_tags,
            'history',
            $this->getContext()
        );
        $classes = array_merge( $classes, $newClasses );
        if ( $tagSummary !== '' ) {
            $s2 .= " $tagSummary";
        }
 
        # Include separator between character difference and following text
        if ( $s2 !== '' ) {
            $s .= ' <span class="mw-changeslist-separator"></span> ' . $s2;
        }
 
        $attribs = [ 'data-mw-revid' => $revRecord->getId() ];
 
        $this->getHookRunner()->onPageHistoryLineEnding( $this, $row, $s, $classes, $attribs );
        $attribs = array_filter( $attribs,
            [ Sanitizer::class, 'isReservedDataAttribute' ],
            ARRAY_FILTER_USE_KEY
        );
 
        if ( $classes ) {
            $attribs['class'] = implode( ' ', $classes );
        }
 
        return Xml::tags( 'li', $attribs, $s ) . "\n";
    }
 
    private function revLink( RevisionRecord $rev ) {
        return ChangesList::revDateLink( $rev, $this->getUser(), $this->getLanguage(),
            $this->getTitle() );
    }
 
    private function curLink( RevisionRecord $rev ) {
        $cur = $this->historyPage->message['cur'];
        $latest = $this->getWikiPage()->getLatest();
        if ( $latest === $rev->getId()
            || !$rev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() )
        ) {
            return $cur;
        } else {
            return $this->getLinkRenderer()->makeKnownLink(
                $this->getTitle(),
                new HtmlArmor( $cur ),
                [],
                [
                    'diff' => $latest,
                    'oldid' => $rev->getId()
                ]
            );
        }
    }
 
    private function lastLink( RevisionRecord $prevRev, $next ) {
        $last = $this->historyPage->message['last'];
 
        if ( $next === null ) {
            # Probably no next row
            return $last;
        }
 
        $linkRenderer = $this->getLinkRenderer();
        if ( $next === 'unknown' ) {
            # Next row probably exists but is unknown, use an oldid=prev link
            return $linkRenderer->makeKnownLink(
                $this->getTitle(),
                new HtmlArmor( $last ),
                [],
                [
                    'diff' => $prevRev->getId(),
                    'oldid' => 'prev'
                ]
            );
        }
 
        $nextRev = $this->revisionStore->newRevisionFromRow(
            $next,
            RevisionStore::READ_NORMAL,
            $this->getTitle()
        );
 
        if ( !$prevRev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() ) ||
            !$nextRev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() )
        ) {
            return $last;
        }
 
        return $linkRenderer->makeKnownLink(
            $this->getTitle(),
            new HtmlArmor( $last ),
            [],
            [
                'diff' => $prevRev->getId(),
                'oldid' => $next->rev_id
            ]
        );
    }
 
    private function diffButtons( RevisionRecord $rev, $firstInList ) {
        if ( $this->getNumRows() > 1 ) {
            $id = $rev->getId();
            $radio = [ 'type' => 'radio', 'value' => $id ];
            if ( $firstInList ) {
                $first = Xml::element( 'input',
                    array_merge( $radio, [
                        'style' => 'visibility:hidden',
                        'name' => 'oldid',
                        'id' => 'mw-oldid-null' ] )
                );
                $checkmark = [ 'checked' => 'checked' ];
            } else {
                # Check visibility of old revisions
                if ( !$rev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() ) ) {
                    $radio['disabled'] = 'disabled';
                    $checkmark = []; // We will check the next possible one
                } elseif ( !$this->oldIdChecked ) {
                    $checkmark = [ 'checked' => 'checked' ];
                    $this->oldIdChecked = $id;
                } else {
                    $checkmark = [];
                }
                $first = Xml::element( 'input',
                    array_merge( $radio, $checkmark, [
                        'name' => 'oldid',
                        'id' => "mw-oldid-$id" ] ) );
                $checkmark = [];
            }
            $second = Xml::element( 'input',
                array_merge( $radio, $checkmark, [
                    'name' => 'diff',
                    'id' => "mw-diff-$id" ] ) );
 
            return $first . $second;
        } else {
            return '';
        }
    }
 
    protected function isNavigationBarShown() {
        if ( $this->getNumRows() == 0 ) {
            return false;
        }
        return parent::isNavigationBarShown();
    }
 
    public function getDefaultQuery() {
        parent::getDefaultQuery();
        unset( $this->mDefaultQuery['date-range-to'] );
        return $this->mDefaultQuery;
    }
 
    private function preventClickjacking( $enable = true ) {
        $this->preventClickjacking = $enable;
    }
 
    public function getPreventClickjacking() {
        return $this->preventClickjacking;
    }
 
}