ApiFeedWatchlist.php

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<?php
use MediaWiki\MediaWikiServices;

class ApiFeedWatchlist extends ApiBase {

    private $watchlistModule = null;
    private $linkToSections = false;

    public function getCustomPrinter() {
        return new ApiFormatFeedWrapper( $this->getMain() );
    }

    public function execute() {
        $config = $this->getConfig();
        $feedClasses = $config->get( 'FeedClasses' );
        $params = [];
        try {
            $params = $this->extractRequestParams();

            if ( !$config->get( 'Feed' ) ) {
                $this->dieWithError( 'feed-unavailable' );
            }

            if ( !isset( $feedClasses[$params['feedformat']] ) ) {
                $this->dieWithError( 'feed-invalid' );
            }

            // limit to the number of hours going from now back
            $endTime = wfTimestamp( TS_MW, time() - (int)$params['hours'] * 60 * 60 );

            // Prepare parameters for nested request
            $fauxReqArr = [
                'action' => 'query',
                'meta' => 'siteinfo',
                'siprop' => 'general',
                'list' => 'watchlist',
                'wlprop' => 'title|user|comment|timestamp|ids|loginfo',
                'wldir' => 'older', // reverse order - from newest to oldest
                'wlend' => $endTime, // stop at this time
                'wllimit' => min( 50, $this->getConfig()->get( 'FeedLimit' ) )
            ];

            if ( $params['wlowner'] !== null ) {
                $fauxReqArr['wlowner'] = $params['wlowner'];
            }
            if ( $params['wltoken'] !== null ) {
                $fauxReqArr['wltoken'] = $params['wltoken'];
            }
            if ( $params['wlexcludeuser'] !== null ) {
                $fauxReqArr['wlexcludeuser'] = $params['wlexcludeuser'];
            }
            if ( $params['wlshow'] !== null ) {
                $fauxReqArr['wlshow'] = $params['wlshow'];
            }
            if ( $params['wltype'] !== null ) {
                $fauxReqArr['wltype'] = $params['wltype'];
            }

            // Support linking directly to sections when possible
            // (possible only if section name is present in comment)
            if ( $params['linktosections'] ) {
                $this->linkToSections = true;
            }

            // Check for 'allrev' parameter, and if found, show all revisions to each page on wl.
            if ( $params['allrev'] ) {
                $fauxReqArr['wlallrev'] = '';
            }

            $fauxReq = new FauxRequest( $fauxReqArr );

            $module = new ApiMain( $fauxReq );
            $module->execute();

            $data = $module->getResult()->getResultData( [ 'query', 'watchlist' ] );
            $feedItems = [];
            foreach ( (array)$data as $key => $info ) {
                if ( ApiResult::isMetadataKey( $key ) ) {
                    continue;
                }
                $feedItem = $this->createFeedItem( $info );
                if ( $feedItem ) {
                    $feedItems[] = $feedItem;
                }
            }

            $msg = wfMessage( 'watchlist' )->inContentLanguage()->text();

            $feedTitle = $this->getConfig()->get( 'Sitename' ) . ' - ' . $msg .
                ' [' . $this->getConfig()->get( 'LanguageCode' ) . ']';
            $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();

            $feed = new $feedClasses[$params['feedformat']] (
                $feedTitle,
                htmlspecialchars( $msg ),
                $feedUrl
            );

            ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
        } catch ( Exception $e ) {
            // Error results should not be cached
            $this->getMain()->setCacheMaxAge( 0 );

            // @todo FIXME: Localise  brackets
            $feedTitle = $this->getConfig()->get( 'Sitename' ) . ' - Error - ' .
                wfMessage( 'watchlist' )->inContentLanguage()->text() .
                ' [' . $this->getConfig()->get( 'LanguageCode' ) . ']';
            $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();

            $feedFormat = $params['feedformat'] ?? 'rss';
            $msg = wfMessage( 'watchlist' )->inContentLanguage()->escaped();
            $feed = new $feedClasses[$feedFormat] ( $feedTitle, $msg, $feedUrl );

            if ( $e instanceof ApiUsageException ) {
                foreach ( $e->getStatusValue()->getErrors() as $error ) {
                    $msg = ApiMessage::create( $error )
                        ->inLanguage( $this->getLanguage() );
                    $errorTitle = $this->msg( 'api-feed-error-title', $msg->getApiCode() );
                    $errorText = $msg->text();
                    $feedItems[] = new FeedItem( $errorTitle, $errorText, '', '', '' );
                }
            } else {
                // Something is seriously wrong
                $errorCode = 'internal_api_error';
                $errorTitle = $this->msg( 'api-feed-error-title', $errorCode );
                $errorText = $e->getMessage();
                $feedItems[] = new FeedItem( $errorTitle, $errorText, '', '', '' );
            }

            ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
        }
    }

    private function createFeedItem( $info ) {
        if ( !isset( $info['title'] ) ) {
            // Probably a revdeled log entry, skip it.
            return null;
        }

        $titleStr = $info['title'];
        $title = Title::newFromText( $titleStr );
        $curidParam = [];
        if ( !$title || $title->isExternal() ) {
            // Probably a formerly-valid title that's now conflicting with an
            // interwiki prefix or the like.
            if ( isset( $info['pageid'] ) ) {
                $title = Title::newFromID( $info['pageid'] );
                $curidParam = [ 'curid' => $info['pageid'] ];
            }
            if ( !$title || $title->isExternal() ) {
                return null;
            }
        }
        if ( isset( $info['revid'] ) ) {
            if ( $info['revid'] === 0 && isset( $info['logid'] ) ) {
                $logTitle = Title::makeTitle( NS_SPECIAL, 'Log' );
                $titleUrl = $logTitle->getFullURL( [ 'logid' => $info['logid'] ] );
            } else {
                $titleUrl = $title->getFullURL( [ 'diff' => $info['revid'] ] );
            }
        } else {
            $titleUrl = $title->getFullURL( $curidParam );
        }
        $comment = $info['comment'] ?? null;

        // Create an anchor to section.
        // The anchor won't work for sections that have dupes on page
        // as there's no way to strip that info from ApiWatchlist (apparently?).
        // RegExp in the line below is equal to Linker::formatAutocomments().
        if ( $this->linkToSections && $comment !== null &&
            preg_match( '!(.*)/\*\s*(.*?)\s*\*/(.*)!', $comment, $matches )
        ) {
            $titleUrl .= MediaWikiServices::getInstance()->getParser()
                ->guessSectionNameFromWikiText( $matches[ 2 ] );
        }

        $timestamp = $info['timestamp'];

        if ( isset( $info['user'] ) ) {
            $user = $info['user'];
            $completeText = "$comment ($user)";
        } else {
            $user = '';
            $completeText = (string)$comment;
        }

        return new FeedItem( $titleStr, $completeText, $titleUrl, $timestamp, $user );
    }

    private function getWatchlistModule() {
        if ( $this->watchlistModule === null ) {
            $this->watchlistModule = $this->getMain()->getModuleManager()->getModule( 'query' )
                ->getModuleManager()->getModule( 'watchlist' );
        }

        return $this->watchlistModule;
    }

    public function getAllowedParams( $flags = 0 ) {
        $feedFormatNames = array_keys( $this->getConfig()->get( 'FeedClasses' ) );
        $ret = [
            'feedformat' => [
                ApiBase::PARAM_DFLT => 'rss',
                ApiBase::PARAM_TYPE => $feedFormatNames
            ],
            'hours' => [
                ApiBase::PARAM_DFLT => 24,
                ApiBase::PARAM_TYPE => 'integer',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => 72,
            ],
            'linktosections' => false,
        ];

        $copyParams = [
            'allrev' => 'allrev',
            'owner' => 'wlowner',
            'token' => 'wltoken',
            'show' => 'wlshow',
            'type' => 'wltype',
            'excludeuser' => 'wlexcludeuser',
        ];
        if ( $flags ) {
            $wlparams = $this->getWatchlistModule()->getAllowedParams( $flags );
            foreach ( $copyParams as $from => $to ) {
                $p = $wlparams[$from];
                if ( !is_array( $p ) ) {
                    $p = [ ApiBase::PARAM_DFLT => $p ];
                }
                if ( !isset( $p[ApiBase::PARAM_HELP_MSG] ) ) {
                    $p[ApiBase::PARAM_HELP_MSG] = "apihelp-query+watchlist-param-$from";
                }
                if ( isset( $p[ApiBase::PARAM_TYPE] ) && is_array( $p[ApiBase::PARAM_TYPE] ) &&
                    isset( $p[ApiBase::PARAM_HELP_MSG_PER_VALUE] )
                ) {
                    foreach ( $p[ApiBase::PARAM_TYPE] as $v ) {
                        if ( !isset( $p[ApiBase::PARAM_HELP_MSG_PER_VALUE][$v] ) ) {
                            $p[ApiBase::PARAM_HELP_MSG_PER_VALUE][$v] = "apihelp-query+watchlist-paramvalue-$from-$v";
                        }
                    }
                }
                $ret[$to] = $p;
            }
        } else {
            foreach ( $copyParams as $from => $to ) {
                $ret[$to] = null;
            }
        }

        return $ret;
    }

    protected function getExamplesMessages() {
        return [
            'action=feedwatchlist'
                => 'apihelp-feedwatchlist-example-default',
            'action=feedwatchlist&allrev=&hours=6'
                => 'apihelp-feedwatchlist-example-all6hrs',
        ];
    }

    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Watchlist_feed';
    }
}