RCCacheEntryFactory.php

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<?php
use MediaWiki\Linker\Linker;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\Permissions\Authority;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Title\Title;
use MediaWiki\User\ExternalUserNames;
 
class RCCacheEntryFactory {
 
    private $context;
 
    private $messages;
 
    private $linkRenderer;
 
    private MapCacheLRU $userLinkCache;
 
    private MapCacheLRU $toolLinkCache;
 
    public function __construct(
        IContextSource $context, $messages, LinkRenderer $linkRenderer
    ) {
        $this->context = $context;
        $this->messages = $messages;
        $this->linkRenderer = $linkRenderer;
        $this->userLinkCache = new MapCacheLRU( 50 );
        $this->toolLinkCache = new MapCacheLRU( 50 );
    }
 
    public function newFromRecentChange( RecentChange $baseRC, $watched ) {
        $user = $this->context->getUser();
 
        $cacheEntry = RCCacheEntry::newFromParent( $baseRC );
 
        // Should patrol-related stuff be shown?
        $cacheEntry->unpatrolled = ChangesList::isUnpatrolled( $baseRC, $user );
 
        $cacheEntry->watched = $cacheEntry->mAttribs['rc_type'] == RC_LOG ? false : $watched;
        $cacheEntry->numberofWatchingusers = $baseRC->numberofWatchingusers;
        $cacheEntry->watchlistExpiry = $baseRC->watchlistExpiry;
 
        $cacheEntry->link = $this->buildCLink( $cacheEntry );
        $cacheEntry->timestamp = $this->buildTimestamp( $cacheEntry );
 
        // Make "cur" and "diff" links.  Do not use link(), it is too slow if
        // called too many times (50% of CPU time on RecentChanges!).
        $showDiffLinks = $this->showDiffLinks( $cacheEntry, $user );
 
        $cacheEntry->difflink = $this->buildDiffLink( $cacheEntry, $showDiffLinks );
        $cacheEntry->curlink = $this->buildCurLink( $cacheEntry, $showDiffLinks );
        $cacheEntry->lastlink = $this->buildLastLink( $cacheEntry, $showDiffLinks );
 
        // Make user links
        $cacheEntry->userlink = $this->getUserLink( $cacheEntry );
 
        if ( !ChangesList::isDeleted( $cacheEntry, RevisionRecord::DELETED_USER ) ) {
            $cacheEntry->usertalklink = $this->toolLinkCache->getWithSetCallback(
                $this->toolLinkCache->makeKey(
                    $cacheEntry->mAttribs['rc_user_text'],
                    $this->context->getUser()->getName(),
                    $this->context->getLanguage()->getCode()
                ),
                static fn() => Linker::userToolLinks(
                    $cacheEntry->mAttribs['rc_user'],
                    $cacheEntry->mAttribs['rc_user_text'],
                    // Should the contributions link be red if the user has no edits (using default)
                    false,
                    // Customisation flags (using default 0)
                    0,
                    // User edit count (using default )
                    null,
                    // do not wrap the message in parentheses
                    false
                )
            );
        }
 
        return $cacheEntry;
    }
 
    private function showDiffLinks( RecentChange $cacheEntry, Authority $performer ) {
        return ChangesList::userCan( $cacheEntry, RevisionRecord::DELETED_TEXT, $performer );
    }
 
    private function buildCLink( RCCacheEntry $cacheEntry ) {
        $type = $cacheEntry->mAttribs['rc_type'];
 
        // Log entries
        if ( $type == RC_LOG ) {
            $logType = $cacheEntry->mAttribs['rc_log_type'];
 
            if ( $logType ) {
                $clink = $this->getLogLink( $logType );
            } else {
                wfDebugLog( 'recentchanges', 'Unexpected log entry with no log type in recent changes' );
                $clink = $this->linkRenderer->makeLink( $cacheEntry->getTitle() );
            }
        // Log entries (old format) and special pages
        } elseif ( $cacheEntry->mAttribs['rc_namespace'] == NS_SPECIAL ) {
            wfDebugLog( 'recentchanges', 'Unexpected special page in recentchanges' );
            $clink = '';
        // Edits and everything else
        } else {
            $clink = $this->linkRenderer->makeKnownLink( $cacheEntry->getTitle() );
        }
 
        return $clink;
    }
 
    private function getLogLink( $logType ) {
        $logtitle = SpecialPage::getTitleFor( 'Log', $logType );
        $logpage = new LogPage( $logType );
        $logname = $logpage->getName()->text();
 
        $logLink = $this->context->msg( 'parentheses' )
            ->rawParams(
                $this->linkRenderer->makeKnownLink( $logtitle, $logname )
            )->escaped();
 
        return $logLink;
    }
 
    private function buildTimestamp( RecentChange $cacheEntry ) {
        return $this->context->getLanguage()->userTime(
            $cacheEntry->mAttribs['rc_timestamp'],
            $this->context->getUser()
        );
    }
 
    private function buildCurQueryParams( RecentChange $recentChange ) {
        return [
            'curid' => $recentChange->mAttribs['rc_cur_id'],
            'diff' => 0,
            'oldid' => $recentChange->mAttribs['rc_this_oldid']
        ];
    }
 
    private function buildCurLink( RecentChange $cacheEntry, $showDiffLinks ) {
        $curMessage = $this->getMessage( 'cur' );
        $logTypes = [ RC_LOG ];
        if ( $cacheEntry->mAttribs['rc_this_oldid'] == $cacheEntry->getAttribute( 'page_latest' ) ) {
            $showDiffLinks = false;
        }
 
        if ( !$showDiffLinks || in_array( $cacheEntry->mAttribs['rc_type'], $logTypes ) ) {
            $curLink = $curMessage;
        } else {
            $queryParams = $this->buildCurQueryParams( $cacheEntry );
            $curUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $queryParams ) );
            $curLink = "<a class=\"mw-changeslist-diff-cur\" href=\"$curUrl\">$curMessage</a>";
        }
 
        return $curLink;
    }
 
    private function buildDiffQueryParams( RecentChange $recentChange ) {
        return [
            'curid' => $recentChange->mAttribs['rc_cur_id'],
            'diff' => $recentChange->mAttribs['rc_this_oldid'],
            'oldid' => $recentChange->mAttribs['rc_last_oldid']
        ];
    }
 
    private function buildDiffLink( RecentChange $cacheEntry, $showDiffLinks ) {
        $queryParams = $this->buildDiffQueryParams( $cacheEntry );
        $diffMessage = $this->getMessage( 'diff' );
        $logTypes = [ RC_NEW, RC_LOG ];
 
        if ( !$showDiffLinks ) {
            $diffLink = $diffMessage;
        } elseif ( in_array( $cacheEntry->mAttribs['rc_type'], $logTypes ) ) {
            $diffLink = $diffMessage;
        } elseif ( $cacheEntry->getAttribute( 'rc_type' ) == RC_CATEGORIZE ) {
            $rcCurId = $cacheEntry->getAttribute( 'rc_cur_id' );
            $pageTitle = Title::newFromID( $rcCurId );
            if ( $pageTitle === null ) {
                wfDebugLog( 'RCCacheEntryFactory', 'Could not get Title for rc_cur_id: ' . $rcCurId );
                return $diffMessage;
            }
            $diffUrl = htmlspecialchars( $pageTitle->getLinkURL( $queryParams ) );
            $diffLink = "<a class=\"mw-changeslist-diff\" href=\"$diffUrl\">$diffMessage</a>";
        } else {
            $diffUrl = htmlspecialchars( $cacheEntry->getTitle()->getLinkURL( $queryParams ) );
            $diffLink = "<a class=\"mw-changeslist-diff\" href=\"$diffUrl\">$diffMessage</a>";
        }
 
        return $diffLink;
    }
 
    private function buildLastLink( RecentChange $cacheEntry, $showDiffLinks ) {
        $lastOldid = $cacheEntry->mAttribs['rc_last_oldid'];
        $lastMessage = $this->getMessage( 'last' );
        $type = $cacheEntry->mAttribs['rc_type'];
        $logTypes = [ RC_LOG ];
 
        // Make "last" link
        if ( !$showDiffLinks || !$lastOldid || in_array( $type, $logTypes ) ) {
            $lastLink = $lastMessage;
        } else {
            $lastLink = $this->linkRenderer->makeKnownLink(
                $cacheEntry->getTitle(),
                new HtmlArmor( $lastMessage ),
                [ 'class' => 'mw-changeslist-diff' ],
                $this->buildDiffQueryParams( $cacheEntry )
            );
        }
 
        return $lastLink;
    }
 
    private function getUserLink( RecentChange $cacheEntry ) {
        if ( ChangesList::isDeleted( $cacheEntry, RevisionRecord::DELETED_USER ) ) {
            $deletedClass = 'history-deleted';
            if ( ChangesList::isDeleted( $cacheEntry, RevisionRecord::DELETED_RESTRICTED ) ) {
                $deletedClass .= ' mw-history-suppressed';
            }
            $userLink = ' <span class="' . $deletedClass . '">' .
                $this->context->msg( 'rev-deleted-user' )->escaped() . '</span>';
        } else {
            $userLink = $this->userLinkCache->getWithSetCallback(
                $this->userLinkCache->makeKey(
                    $cacheEntry->mAttribs['rc_user_text'],
                    $this->context->getUser()->getName(),
                    $this->context->getLanguage()->getCode()
                ),
                static fn() => Linker::userLink(
                    $cacheEntry->mAttribs['rc_user'],
                    $cacheEntry->mAttribs['rc_user_text'],
                    ExternalUserNames::getLocal( $cacheEntry->mAttribs['rc_user_text'] )
                )
            );
        }
 
        return $userLink;
    }
 
    private function getMessage( $key ) {
        return $this->messages[$key];
    }
 
}