ApiQueryWatchlistRaw.php

Go to the documentation of this file.

<?php
class ApiQueryWatchlistRaw extends ApiQueryGeneratorBase {

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

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

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

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

                $params = $this->extractRequestParams();

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

                $prop = array_flip( (array)$params['prop'] );
                $show = array_flip( (array)$params['show'] );
                if ( isset( $show['changed'] ) && isset( $show['!changed'] ) ) {
                        $this->dieUsageMsg( 'show' );
                }

                $this->addTables( 'watchlist' );
                $this->addFields( array( 'wl_namespace', 'wl_title' ) );
                $this->addFieldsIf( 'wl_notificationtimestamp', isset( $prop['changed'] ) );
                $this->addWhereFld( 'wl_user', $user->getId() );
                $this->addWhereFld( 'wl_namespace', $params['namespace'] );
                $this->addWhereIf( 'wl_notificationtimestamp IS NOT NULL', isset( $show['changed'] ) );
                $this->addWhereIf( 'wl_notificationtimestamp IS NULL', isset( $show['!changed'] ) );

                if ( isset( $params['continue'] ) ) {
                        $cont = explode( '|', $params['continue'] );
                        if ( count( $cont ) != 2 ) {
                                $this->dieUsage( "Invalid continue param. You should pass the " .
                                        "original value returned by the previous query", "_badcontinue" );
                        }
                        $ns = intval( $cont[0] );
                        $title = $this->getDB()->addQuotes( $cont[1] );
                        $op = $params['dir'] == 'ascending' ? '>' : '<';
                        $this->addWhere(
                                "wl_namespace $op $ns OR " .
                                "(wl_namespace = $ns AND " .
                                "wl_title $op= $title)"
                        );
                }

                $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
                // Don't ORDER BY wl_namespace if it's constant in the WHERE clause
                if ( count( $params['namespace'] ) == 1 ) {
                        $this->addOption( 'ORDER BY', 'wl_title' . $sort );
                } else {
                        $this->addOption( 'ORDER BY', array(
                                'wl_namespace' . $sort,
                                'wl_title' . $sort
                        ));
                }
                $this->addOption( 'LIMIT', $params['limit'] + 1 );
                $res = $this->select( __METHOD__ );

                $titles = array();
                $count = 0;
                foreach ( $res as $row ) {
                        if ( ++$count > $params['limit'] ) {
                                // We've reached the one extra which shows that there are additional pages to be had. Stop here...
                                $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' . $row->wl_title );
                                break;
                        }
                        $t = Title::makeTitle( $row->wl_namespace, $row->wl_title );

                        if ( is_null( $resultPageSet ) ) {
                                $vals = array();
                                ApiQueryBase::addTitleInfo( $vals, $t );
                                if ( isset( $prop['changed'] ) && !is_null( $row->wl_notificationtimestamp ) )
                                {
                                        $vals['changed'] = wfTimestamp( TS_ISO_8601, $row->wl_notificationtimestamp );
                                }
                                $fit = $this->getResult()->addValue( $this->getModuleName(), null, $vals );
                                if ( !$fit ) {
                                        $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' . $row->wl_title );
                                        break;
                                }
                        } else {
                                $titles[] = $t;
                        }
                }
                if ( is_null( $resultPageSet ) ) {
                        $this->getResult()->setIndexedTagName_internal( $this->getModuleName(), 'wr' );
                } else {
                        $resultPageSet->populateFromTitles( $titles );
                }
        }

        public function getAllowedParams() {
                return array(
                        'continue' => null,
                        'namespace' => array(
                                ApiBase::PARAM_ISMULTI => true,
                                ApiBase::PARAM_TYPE => 'namespace'
                        ),
                        'limit' => array(
                                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' => array(
                                ApiBase::PARAM_ISMULTI => true,
                                ApiBase::PARAM_TYPE => array(
                                        'changed',
                                )
                        ),
                        'show' => array(
                                ApiBase::PARAM_ISMULTI => true,
                                ApiBase::PARAM_TYPE => array(
                                        'changed',
                                        '!changed',
                                )
                        ),
                        'owner' => array(
                                ApiBase::PARAM_TYPE => 'user'
                        ),
                        'token' => array(
                                ApiBase::PARAM_TYPE => 'string'
                        ),
                        'dir' => array(
                                ApiBase::PARAM_DFLT => 'ascending',
                                ApiBase::PARAM_TYPE => array(
                                        'ascending',
                                        'descending'
                                ),
                        ),
                );
        }

        public function getParamDescription() {
                return array(
                        'continue' => 'When more results are available, use this to continue',
                        'namespace' => 'Only list pages in the given namespace(s)',
                        'limit' => 'How many total results to return per request',
                        'prop' => array(
                                'Which additional properties to get (non-generator mode only)',
                                ' changed  - Adds timestamp of when the user was last notified about the edit',
                        ),
                        'show' => 'Only list items that meet these criteria',
                        'owner' => 'The name of the user whose watchlist you\'d like to access',
                        'token' => 'Give a security token (settable in preferences) to allow access to another user\'s watchlist',
                        'dir' => 'Direction to sort the titles and namespaces in',
                );
        }

        public function getResultProperties() {
                return array(
                        '' => array(
                                'ns' => 'namespace',
                                'title' => 'string'
                        ),
                        'changed' => array(
                                'changed' => array(
                                        ApiBase::PROP_TYPE => 'timestamp',
                                        ApiBase::PROP_NULLABLE => true
                                )
                        )
                );
        }

        public function getDescription() {
                return "Get all pages on the logged in user's watchlist";
        }

        public function getPossibleErrors() {
                return array_merge( parent::getPossibleErrors(), array(
                        array( 'code' => 'notloggedin', 'info' => 'You must be logged-in to have a watchlist' ),
                        array( 'show' ),
                        array( 'code' => 'bad_wlowner', 'info' => 'Specified user does not exist' ),
                        array( 'code' => 'bad_wltoken', 'info' => 'Incorrect watchlist token provided -- please set a correct token in Special:Preferences' ),
                ) );
        }

        public function getExamples() {
                return array(
                        'api.php?action=query&list=watchlistraw',
                        'api.php?action=query&generator=watchlistraw&gwrshow=changed&prop=revisions',
                );
        }

        public function getVersion() {
                return __CLASS__ . ': $Id$';
        }
}