HistoryPager.php

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<?php
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\CommentFormatter\CommentFormatter;
use MediaWiki\HookContainer\HookContainer;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\Html\ListToggle;
use MediaWiki\Linker\Linker;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\Watchlist\WatchlistManager;
 
class HistoryPager extends ReverseChronologicalPager {
 
    public $mGroupByDate = true;
 
    public $historyPage, $buttons, $conds;
 
    protected $oldIdChecked;
 
    protected $preventClickjacking = false;
    protected $parentLens;
 
    protected $showTagEditUI;
 
    private $tagFilter;
 
    private $notificationTimestamp;
 
    private $revisionStore;
 
    private $watchlistManager;
 
    private $linkBatchFactory;
 
    private $commentFormatter;
 
    private $hookRunner;
 
    private $revisions = [];
 
    private $formattedComments = [];
 
    public function __construct(
        HistoryAction $historyPage,
        $year = 0,
        $month = 0,
        $tagFilter = '',
        array $conds = [],
        $day = 0,
        LinkBatchFactory $linkBatchFactory = null,
        WatchlistManager $watchlistManager = null,
        CommentFormatter $commentFormatter = null,
        HookContainer $hookContainer = 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();
        $this->commentFormatter = $commentFormatter ?? $services->getCommentFormatter();
        $this->hookRunner = new HookRunner( $hookContainer ?? $services->getHookContainer() );
        $this->notificationTimestamp = $this->getConfig()->get( MainConfigNames::ShowUpdatedMarker )
            ? $this->watchlistManager->getTitleNotificationTimestamp( $this->getUser(), $this->getTitle() )
            : false;
    }
 
    // 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' ] );
 
        $queryInfo = [
            'tables' => $revQuery['tables'],
            'fields' => $revQuery['fields'],
            'conds' => array_merge(
                [ 'rev_page' => $this->getWikiPage()->getId() ],
                $this->conds ),
            'options' => [ 'USE INDEX' => [ 'revision' => 'rev_page_timestamp' ] ],
            'join_conds' => $revQuery['joins'],
        ];
        ChangeTags::modifyDisplayQuery(
            $queryInfo['tables'],
            $queryInfo['fields'],
            $queryInfo['conds'],
            $queryInfo['join_conds'],
            $queryInfo['options'],
            $this->tagFilter
        );
 
        $this->hookRunner->onPageHistoryPager__getQueryInfo( $this, $queryInfo );
 
        return $queryInfo;
    }
 
    public function getIndexField() {
        return [ [ 'rev_timestamp', 'rev_id' ] ];
    }
 
    protected function doBatchLookups() {
        if ( !$this->hookRunner->onPageHistoryPager__doBatchLookups( $this, $this->mResult ) ) {
            return;
        }
 
        # Do a link batch query
        $batch = $this->linkBatchFactory->newLinkBatch();
        $revIds = [];
        $title = $this->getTitle();
        foreach ( $this->mResult as $row ) {
            if ( $row->rev_parent_id ) {
                $revIds[] = (int)$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->revisions[] = $this->revisionStore->newRevisionFromRow(
                $row,
                RevisionStore::READ_NORMAL,
                $title
            );
        }
        $this->parentLens = $this->revisionStore->getRevisionSizes( $revIds );
        $batch->execute();
 
        # The keys of $this->formattedComments will be the same as the keys of $this->revisions
        $this->formattedComments = $this->commentFormatter->createRevisionBatch()
            ->revisions( $this->revisions )
            ->authority( $this->getAuthority() )
            ->samePage( false )
            ->hideIfDeleted( true )
            ->useParentheses( false )
            ->execute();
 
        $this->mResult->seek( 0 );
    }
 
    protected function getEmptyBody() {
        return $this->msg( 'history-empty' )->escaped();
    }
 
    protected function getStartBody() {
        $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' );
            // Main form for comparing revisions
            $s = Html::openElement( 'form', [
                'action' => wfScript(),
                'id' => 'mw-history-compare'
            ] ) . "\n";
            $s .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) . "\n";
            $s .= Html::hidden( 'type', 'revision', [ 'form' => 'mw-history-revisionactions' ] ) . "\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 ) {
                // Prepend a mini-form for changing visibility and editing tags.
                // Checkboxes and buttons are associated with it using the <input form="…"> attribute.
                //
                // This makes the submitted parameters cleaner (on supporting browsers - all except IE 11):
                // the 'mw-history-compare' form submission will omit the `ids[…]` parameters, and the
                // 'mw-history-revisionactions' form submission will omit the `diff` and `oldid` parameters.
                $s = Html::rawElement( 'form', [
                    'action' => wfScript(),
                    'id' => 'mw-history-revisionactions',
                ], Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) ) . "\n" . $s;
 
                $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 .= '<section id="pagehistory" class="mw-pager-body">';
 
        return $s;
    }
 
    private function getRevisionButton( $name, $msg ) {
        $this->preventClickjacking = true;
        $element = Html::element(
            'button',
            [
                'type' => 'submit',
                'name' => 'action',
                'value' => $name,
                'class' => "historysubmit mw-history-$name-button mw-ui-button",
                'form' => 'mw-history-revisionactions',
            ],
            $this->msg( $msg )->text()
        ) . "\n";
        return $element;
    }
 
    protected function getEndBody() {
        if ( $this->getNumRows() == 0 ) {
            return '';
        }
        $s = '';
        # Add second buttons only if there is more than one rev
        if ( $this->getNumRows() > 2 ) {
            $s .= $this->buttons;
        }
        $s .= '</section>'; // closes section#pagehistory
        $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 '';
        }
    }
 
    public function formatRow( $row ) {
        $resultOffset = $this->getResultOffset();
        $numRows = min( $this->mResult->numRows(), $this->mLimit );
 
        $firstInList = $resultOffset === ( $this->mIsBackwards ? $numRows - 1 : 0 );
        // Next in the list, previous in chronological order.
        $nextResultOffset = $resultOffset + ( $this->mIsBackwards ? -1 : 1 );
 
        $revRecord = $this->revisions[$resultOffset];
        // This may only be null if the current line is the last one in the list.
        $previousRevRecord = $this->revisions[$nextResultOffset] ?? null;
 
        $latest = $revRecord->getId() === $this->getWikiPage()->getLatest();
        $curlink = $this->curLink( $revRecord );
        if ( $previousRevRecord ) {
            // Display a link to compare to the previous revision
            $lastlink = $this->lastLink( $revRecord, $previousRevRecord );
        } elseif ( $this->mIsBackwards && $this->mOffset !== '' ) {
            // When paging "backwards", we don't have the extra result for the next revision that would
            // appear in the list, and we don't know whether this is the oldest revision or not.
            // However, if an offset has been specified, then the user probably reached this page by
            // navigating from the "next" page, therefore the next revision probably exists.
            // Display a link using &oldid=prev (this skips some checks but that's fine).
            $lastlink = $this->lastLink( $revRecord, null );
        } else {
            // Do not display a link, because this is the oldest revision of the page
            $lastlink = $this->historyPage->message['last'];
        }
        $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 = '';
        $canRevDelete = $this->getAuthority()->isAllowed( 'deleterevision' );
        // Show checkboxes for each revision, to allow for revision deletion and
        // change tags
        if ( $canRevDelete || $this->showTagEditUI ) {
            $this->preventClickjacking = true;
            // If revision was hidden from sysops and we don't need the checkbox
            // for anything else, disable it
            if ( !$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() . ']', 'form' => 'mw-history-revisionactions' ] );
            }
        // 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 = $this->formattedComments[$resultOffset];
 
        if ( $s2 === '' ) {
            $defaultComment = $this->msg( 'changeslist-nocomment' )->escaped();
            $s2 = "<span class=\"comment mw-comment-none\">$defaultComment</span>";
        }
 
        if ( $this->notificationTimestamp && $row->rev_timestamp >= $this->notificationTimestamp ) {
            $s2 .= ' <span class="updatedmarker">' . $this->msg( 'updatedmarker' )->escaped() . '</span>';
            $classes[] = 'mw-history-line-updated';
        }
 
        $pagerTools = new PagerTools(
            $revRecord,
            $previousRevRecord,
            $latest && $previousRevRecord,
            $this->hookRunner,
            $this->getTitle(),
            $this->getContext(),
            $this->getLinkRenderer()
        );
        if ( $pagerTools->shouldPreventClickjacking() ) {
            $this->preventClickjacking = true;
        }
        $s2 .= $pagerTools->toHTML();
 
        # Tags
        [ $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
        $s .= ' <span class="mw-changeslist-separator"></span> ' . $s2;
 
        $attribs = [ 'data-mw-revid' => $revRecord->getId() ];
 
        $this->hookRunner->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->getAuthority(), $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 ),
                [
                    'title' => $this->historyPage->message['tooltip-cur']
                ],
                [
                    'diff' => $latest,
                    'oldid' => $rev->getId()
                ]
            );
        }
    }
 
    private function lastLink( RevisionRecord $prevRev, ?RevisionRecord $nextRev ) {
        $last = $this->historyPage->message['last'];
 
        if ( !$prevRev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() ) ||
            ( $nextRev && !$nextRev->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() ) )
        ) {
            return $last;
        }
 
        return $this->getLinkRenderer()->makeKnownLink(
            $this->getTitle(),
            new HtmlArmor( $last ),
            [
                'title' => $this->historyPage->message['tooltip-last']
            ],
            [
                'diff' => 'prev', // T243569
                'oldid' => $prevRev->getId()
            ]
        );
    }
 
    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, [
                        // Disable the hidden radio because it can still
                        // be selected with arrow keys on Firefox
                        'disabled' => '',
                        '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 getPreventClickjacking() {
        return $this->preventClickjacking;
    }
 
}