ChangesFeed.php

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<?php
use MediaWiki\MediaWikiServices;

class ChangesFeed {
    private $format;

    public function __construct( $format ) {
        $this->format = $format;
    }

    public function getFeedObject( $title, $description, $url ) {
        global $wgSitename, $wgLanguageCode, $wgFeedClasses;

        if ( !isset( $wgFeedClasses[$this->format] ) ) {
            return false;
        }

        if ( !array_key_exists( $this->format, $wgFeedClasses ) ) {
            // falling back to atom
            $this->format = 'atom';
        }

        $feedTitle = "$wgSitename  - {$title} [$wgLanguageCode]";
        return new $wgFeedClasses[$this->format](
            $feedTitle, htmlspecialchars( $description ), $url );
    }

    public static function buildItems( $rows ) {
        $items = [];

        # Merge adjacent edits by one user
        $sorted = [];
        $n = 0;
        foreach ( $rows as $obj ) {
            if ( $obj->rc_type == RC_EXTERNAL ) {
                continue;
            }

            if ( $n > 0 &&
                $obj->rc_type == RC_EDIT &&
                $obj->rc_namespace >= 0 &&
                $obj->rc_cur_id == $sorted[$n - 1]->rc_cur_id &&
                $obj->rc_user_text == $sorted[$n - 1]->rc_user_text ) {
                $sorted[$n - 1]->rc_last_oldid = $obj->rc_last_oldid;
            } else {
                $sorted[$n] = $obj;
                $n++;
            }
        }

        $nsInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
        foreach ( $sorted as $obj ) {
            $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
            $talkpage = $nsInfo->hasTalkNamespace( $obj->rc_namespace )
                ? $title->getTalkPage()->getFullURL()
                : '';

            // Skip items with deleted content (avoids partially complete/inconsistent output)
            if ( $obj->rc_deleted ) {
                continue;
            }

            if ( $obj->rc_this_oldid ) {
                $url = $title->getFullURL( [
                    'diff' => $obj->rc_this_oldid,
                    'oldid' => $obj->rc_last_oldid,
                ] );
            } else {
                // log entry or something like that.
                $url = $title->getFullURL();
            }

            $items[] = new FeedItem(
                $title->getPrefixedText(),
                FeedUtils::formatDiff( $obj ),
                $url,
                $obj->rc_timestamp,
                ( $obj->rc_deleted & Revision::DELETED_USER )
                    ? wfMessage( 'rev-deleted-user' )->escaped() : $obj->rc_user_text,
                $talkpage
            );
        }

        return $items;
    }
}