ApiQueryWatchlist.php

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<?php
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;

class ApiQueryWatchlist extends ApiQueryGeneratorBase {

    private $commentStore;

    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'wl' );
    }

    public function execute() {
        $this->run();
    }

    public function executeGenerator( $resultPageSet ) {
        $this->run( $resultPageSet );
    }

    private $fld_ids = false, $fld_title = false, $fld_patrol = false,
        $fld_flags = false, $fld_timestamp = false, $fld_user = false,
        $fld_comment = false, $fld_parsedcomment = false, $fld_sizes = false,
        $fld_notificationtimestamp = false, $fld_userid = false,
        $fld_loginfo = false, $fld_tags;

    private function run( $resultPageSet = null ) {
        $this->selectNamedDB( 'watchlist', DB_REPLICA, 'watchlist' );

        $params = $this->extractRequestParams();

        $user = $this->getUser();
        $wlowner = $this->getWatchlistUser( $params );

        if ( !is_null( $params['prop'] ) && is_null( $resultPageSet ) ) {
            $prop = array_flip( $params['prop'] );

            $this->fld_ids = isset( $prop['ids'] );
            $this->fld_title = isset( $prop['title'] );
            $this->fld_flags = isset( $prop['flags'] );
            $this->fld_user = isset( $prop['user'] );
            $this->fld_userid = isset( $prop['userid'] );
            $this->fld_comment = isset( $prop['comment'] );
            $this->fld_parsedcomment = isset( $prop['parsedcomment'] );
            $this->fld_timestamp = isset( $prop['timestamp'] );
            $this->fld_sizes = isset( $prop['sizes'] );
            $this->fld_patrol = isset( $prop['patrol'] );
            $this->fld_notificationtimestamp = isset( $prop['notificationtimestamp'] );
            $this->fld_loginfo = isset( $prop['loginfo'] );
            $this->fld_tags = isset( $prop['tags'] );

            if ( $this->fld_patrol && !$user->useRCPatrol() && !$user->useNPPatrol() ) {
                $this->dieWithError( 'apierror-permissiondenied-patrolflag', 'patrol' );
            }

            if ( $this->fld_comment || $this->fld_parsedcomment ) {
                $this->commentStore = CommentStore::getStore();
            }
        }

        $options = [
            'dir' => $params['dir'] === 'older'
                ? WatchedItemQueryService::DIR_OLDER
                : WatchedItemQueryService::DIR_NEWER,
        ];

        if ( is_null( $resultPageSet ) ) {
            $options['includeFields'] = $this->getFieldsToInclude();
        } else {
            $options['usedInGenerator'] = true;
        }

        if ( $params['start'] ) {
            $options['start'] = $params['start'];
        }
        if ( $params['end'] ) {
            $options['end'] = $params['end'];
        }

        $startFrom = null;
        if ( !is_null( $params['continue'] ) ) {
            $cont = explode( '|', $params['continue'] );
            $this->dieContinueUsageIf( count( $cont ) != 2 );
            $continueTimestamp = $cont[0];
            $continueId = (int)$cont[1];
            $this->dieContinueUsageIf( $continueId != $cont[1] );
            $startFrom = [ $continueTimestamp, $continueId ];
        }

        if ( $wlowner !== $user ) {
            $options['watchlistOwner'] = $wlowner;
            $options['watchlistOwnerToken'] = $params['token'];
        }

        if ( !is_null( $params['namespace'] ) ) {
            $options['namespaceIds'] = $params['namespace'];
        }

        if ( $params['allrev'] ) {
            $options['allRevisions'] = true;
        }

        if ( !is_null( $params['show'] ) ) {
            $show = array_flip( $params['show'] );

            /* Check for conflicting parameters. */
            if ( $this->showParamsConflicting( $show ) ) {
                $this->dieWithError( 'apierror-show' );
            }

            // Check permissions.
            if ( isset( $show[WatchedItemQueryService::FILTER_PATROLLED] )
                || isset( $show[WatchedItemQueryService::FILTER_NOT_PATROLLED] )
            ) {
                if ( !$user->useRCPatrol() && !$user->useNPPatrol() ) {
                    $this->dieWithError( 'apierror-permissiondenied-patrolflag', 'permissiondenied' );
                }
            }

            $options['filters'] = array_keys( $show );
        }

        if ( !is_null( $params['type'] ) ) {
            try {
                $rcTypes = RecentChange::parseToRCType( $params['type'] );
                if ( $rcTypes ) {
                    $options['rcTypes'] = $rcTypes;
                }
            } catch ( Exception $e ) {
                ApiBase::dieDebug( __METHOD__, $e->getMessage() );
            }
        }

        $this->requireMaxOneParameter( $params, 'user', 'excludeuser' );
        if ( !is_null( $params['user'] ) ) {
            $options['onlyByUser'] = $params['user'];
        }
        if ( !is_null( $params['excludeuser'] ) ) {
            $options['notByUser'] = $params['excludeuser'];
        }

        $options['limit'] = $params['limit'];

        Hooks::run( 'ApiQueryWatchlistPrepareWatchedItemQueryServiceOptions', [
            $this, $params, &$options
        ] );

        $ids = [];
        $watchedItemQuery = MediaWikiServices::getInstance()->getWatchedItemQueryService();
        $items = $watchedItemQuery->getWatchedItemsWithRecentChangeInfo( $wlowner, $options, $startFrom );

        foreach ( $items as list( $watchedItem, $recentChangeInfo ) ) {
            if ( is_null( $resultPageSet ) ) {
                $vals = $this->extractOutputData( $watchedItem, $recentChangeInfo );
                $fit = $this->getResult()->addValue( [ 'query', $this->getModuleName() ], null, $vals );
                if ( !$fit ) {
                    $startFrom = [ $recentChangeInfo['rc_timestamp'], $recentChangeInfo['rc_id'] ];
                    break;
                }
            } elseif ( $params['allrev'] ) {
                $ids[] = (int)$recentChangeInfo['rc_this_oldid'];
            } else {
                $ids[] = (int)$recentChangeInfo['rc_cur_id'];
            }
        }

        if ( $startFrom !== null ) {
            $this->setContinueEnumParameter( 'continue', implode( '|', $startFrom ) );
        }

        if ( is_null( $resultPageSet ) ) {
            $this->getResult()->addIndexedTagName(
                [ 'query', $this->getModuleName() ],
                'item'
            );
        } elseif ( $params['allrev'] ) {
            $resultPageSet->populateFromRevisionIDs( $ids );
        } else {
            $resultPageSet->populateFromPageIDs( $ids );
        }
    }

    private function getFieldsToInclude() {
        $includeFields = [];
        if ( $this->fld_flags ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_FLAGS;
        }
        if ( $this->fld_user || $this->fld_userid ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_USER_ID;
        }
        if ( $this->fld_user ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_USER;
        }
        if ( $this->fld_comment || $this->fld_parsedcomment ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_COMMENT;
        }
        if ( $this->fld_patrol ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_PATROL_INFO;
            $includeFields[] = WatchedItemQueryService::INCLUDE_AUTOPATROL_INFO;
        }
        if ( $this->fld_sizes ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_SIZES;
        }
        if ( $this->fld_loginfo ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_LOG_INFO;
        }
        if ( $this->fld_tags ) {
            $includeFields[] = WatchedItemQueryService::INCLUDE_TAGS;
        }
        return $includeFields;
    }

    private function showParamsConflicting( array $show ) {
        return ( isset( $show[WatchedItemQueryService::FILTER_MINOR] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_MINOR] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_BOT] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_BOT] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_ANON] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_ANON] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_PATROLLED] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_PATROLLED] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_AUTOPATROLLED] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_AUTOPATROLLED] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_AUTOPATROLLED] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_PATROLLED] ) )
        || ( isset( $show[WatchedItemQueryService::FILTER_UNREAD] )
            && isset( $show[WatchedItemQueryService::FILTER_NOT_UNREAD] ) );
    }

    private function extractOutputData( WatchedItem $watchedItem, array $recentChangeInfo ) {
        /* Determine the title of the page that has been changed. */
        $title = Title::newFromLinkTarget( $watchedItem->getLinkTarget() );
        $user = $this->getUser();

        /* Our output data. */
        $vals = [];
        $type = (int)$recentChangeInfo['rc_type'];
        $vals['type'] = RecentChange::parseFromRCType( $type );
        $anyHidden = false;

        /* Create a new entry in the result for the title. */
        if ( $this->fld_title || $this->fld_ids ) {
            // These should already have been filtered out of the query, but just in case.
            if ( $type === RC_LOG && ( $recentChangeInfo['rc_deleted'] & LogPage::DELETED_ACTION ) ) {
                $vals['actionhidden'] = true;
                $anyHidden = true;
            }
            if ( $type !== RC_LOG ||
                LogEventsList::userCanBitfield(
                    $recentChangeInfo['rc_deleted'],
                    LogPage::DELETED_ACTION,
                    $user
                )
            ) {
                if ( $this->fld_title ) {
                    ApiQueryBase::addTitleInfo( $vals, $title );
                }
                if ( $this->fld_ids ) {
                    $vals['pageid'] = (int)$recentChangeInfo['rc_cur_id'];
                    $vals['revid'] = (int)$recentChangeInfo['rc_this_oldid'];
                    $vals['old_revid'] = (int)$recentChangeInfo['rc_last_oldid'];
                }
            }
        }

        /* Add user data and 'anon' flag, if user is anonymous. */
        if ( $this->fld_user || $this->fld_userid ) {
            if ( $recentChangeInfo['rc_deleted'] & RevisionRecord::DELETED_USER ) {
                $vals['userhidden'] = true;
                $anyHidden = true;
            }
            if ( RevisionRecord::userCanBitfield(
                $recentChangeInfo['rc_deleted'],
                RevisionRecord::DELETED_USER,
                $user
            ) ) {
                if ( $this->fld_userid ) {
                    $vals['userid'] = (int)$recentChangeInfo['rc_user'];
                    // for backwards compatibility
                    $vals['user'] = (int)$recentChangeInfo['rc_user'];
                }

                if ( $this->fld_user ) {
                    $vals['user'] = $recentChangeInfo['rc_user_text'];
                }

                if ( !$recentChangeInfo['rc_user'] ) {
                    $vals['anon'] = true;
                }
            }
        }

        /* Add flags, such as new, minor, bot. */
        if ( $this->fld_flags ) {
            $vals['bot'] = (bool)$recentChangeInfo['rc_bot'];
            $vals['new'] = $recentChangeInfo['rc_type'] == RC_NEW;
            $vals['minor'] = (bool)$recentChangeInfo['rc_minor'];
        }

        /* Add sizes of each revision. (Only available on 1.10+) */
        if ( $this->fld_sizes ) {
            $vals['oldlen'] = (int)$recentChangeInfo['rc_old_len'];
            $vals['newlen'] = (int)$recentChangeInfo['rc_new_len'];
        }

        /* Add the timestamp. */
        if ( $this->fld_timestamp ) {
            $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $recentChangeInfo['rc_timestamp'] );
        }

        if ( $this->fld_notificationtimestamp ) {
            $vals['notificationtimestamp'] = ( $watchedItem->getNotificationTimestamp() == null )
                ? ''
                : wfTimestamp( TS_ISO_8601, $watchedItem->getNotificationTimestamp() );
        }

        /* Add edit summary / log summary. */
        if ( $this->fld_comment || $this->fld_parsedcomment ) {
            if ( $recentChangeInfo['rc_deleted'] & RevisionRecord::DELETED_COMMENT ) {
                $vals['commenthidden'] = true;
                $anyHidden = true;
            }
            if ( RevisionRecord::userCanBitfield(
                $recentChangeInfo['rc_deleted'],
                RevisionRecord::DELETED_COMMENT,
                $user
            ) ) {
                $comment = $this->commentStore->getComment( 'rc_comment', $recentChangeInfo )->text;
                if ( $this->fld_comment ) {
                    $vals['comment'] = $comment;
                }

                if ( $this->fld_parsedcomment ) {
                    $vals['parsedcomment'] = Linker::formatComment( $comment, $title );
                }
            }
        }

        /* Add the patrolled flag */
        if ( $this->fld_patrol ) {
            $vals['patrolled'] = $recentChangeInfo['rc_patrolled'] != RecentChange::PRC_UNPATROLLED;
            $vals['unpatrolled'] = ChangesList::isUnpatrolled( (object)$recentChangeInfo, $user );
            $vals['autopatrolled'] = $recentChangeInfo['rc_patrolled'] == RecentChange::PRC_AUTOPATROLLED;
        }

        if ( $this->fld_loginfo && $recentChangeInfo['rc_type'] == RC_LOG ) {
            if ( $recentChangeInfo['rc_deleted'] & LogPage::DELETED_ACTION ) {
                $vals['actionhidden'] = true;
                $anyHidden = true;
            }
            if ( LogEventsList::userCanBitfield(
                $recentChangeInfo['rc_deleted'],
                LogPage::DELETED_ACTION,
                $user
            ) ) {
                $vals['logid'] = (int)$recentChangeInfo['rc_logid'];
                $vals['logtype'] = $recentChangeInfo['rc_log_type'];
                $vals['logaction'] = $recentChangeInfo['rc_log_action'];
                $vals['logparams'] = LogFormatter::newFromRow( $recentChangeInfo )->formatParametersForApi();
            }
        }

        if ( $this->fld_tags ) {
            if ( $recentChangeInfo['rc_tags'] ) {
                $tags = explode( ',', $recentChangeInfo['rc_tags'] );
                ApiResult::setIndexedTagName( $tags, 'tag' );
                $vals['tags'] = $tags;
            } else {
                $vals['tags'] = [];
            }
        }

        if ( $anyHidden && ( $recentChangeInfo['rc_deleted'] & RevisionRecord::DELETED_RESTRICTED ) ) {
            $vals['suppressed'] = true;
        }

        Hooks::run( 'ApiQueryWatchlistExtractOutputData', [
            $this, $watchedItem, $recentChangeInfo, &$vals
        ] );

        return $vals;
    }

    public function getAllowedParams() {
        return [
            'allrev' => false,
            'start' => [
                ApiBase::PARAM_TYPE => 'timestamp'
            ],
            'end' => [
                ApiBase::PARAM_TYPE => 'timestamp'
            ],
            'namespace' => [
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_TYPE => 'namespace'
            ],
            'user' => [
                ApiBase::PARAM_TYPE => 'user',
            ],
            'excludeuser' => [
                ApiBase::PARAM_TYPE => 'user',
            ],
            'dir' => [
                ApiBase::PARAM_DFLT => 'older',
                ApiBase::PARAM_TYPE => [
                    'newer',
                    'older'
                ],
                ApiHelp::PARAM_HELP_MSG => 'api-help-param-direction',
            ],
            'limit' => [
                ApiBase::PARAM_DFLT => 10,
                ApiBase::PARAM_TYPE => 'limit',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
                ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ],
            'prop' => [
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_DFLT => 'ids|title|flags',
                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
                ApiBase::PARAM_TYPE => [
                    'ids',
                    'title',
                    'flags',
                    'user',
                    'userid',
                    'comment',
                    'parsedcomment',
                    'timestamp',
                    'patrol',
                    'sizes',
                    'notificationtimestamp',
                    'loginfo',
                    'tags',
                ]
            ],
            'show' => [
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_TYPE => [
                    WatchedItemQueryService::FILTER_MINOR,
                    WatchedItemQueryService::FILTER_NOT_MINOR,
                    WatchedItemQueryService::FILTER_BOT,
                    WatchedItemQueryService::FILTER_NOT_BOT,
                    WatchedItemQueryService::FILTER_ANON,
                    WatchedItemQueryService::FILTER_NOT_ANON,
                    WatchedItemQueryService::FILTER_PATROLLED,
                    WatchedItemQueryService::FILTER_NOT_PATROLLED,
                    WatchedItemQueryService::FILTER_AUTOPATROLLED,
                    WatchedItemQueryService::FILTER_NOT_AUTOPATROLLED,
                    WatchedItemQueryService::FILTER_UNREAD,
                    WatchedItemQueryService::FILTER_NOT_UNREAD,
                ]
            ],
            'type' => [
                ApiBase::PARAM_DFLT => 'edit|new|log|categorize',
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
                ApiBase::PARAM_TYPE => RecentChange::getChangeTypes()
            ],
            'owner' => [
                ApiBase::PARAM_TYPE => 'user'
            ],
            'token' => [
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_SENSITIVE => true,
            ],
            'continue' => [
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
        ];
    }

    protected function getExamplesMessages() {
        return [
            'action=query&list=watchlist'
                => 'apihelp-query+watchlist-example-simple',
            'action=query&list=watchlist&wlprop=ids|title|timestamp|user|comment'
                => 'apihelp-query+watchlist-example-props',
            'action=query&list=watchlist&wlallrev=&wlprop=ids|title|timestamp|user|comment'
                => 'apihelp-query+watchlist-example-allrev',
            'action=query&generator=watchlist&prop=info'
                => 'apihelp-query+watchlist-example-generator',
            'action=query&generator=watchlist&gwlallrev=&prop=revisions&rvprop=timestamp|user'
                => 'apihelp-query+watchlist-example-generator-rev',
            'action=query&list=watchlist&wlowner=Example&wltoken=123ABC'
                => 'apihelp-query+watchlist-example-wlowner',
        ];
    }

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