PHPSessionHandler: Implement SessionHandlerInterface

[mediawiki.git] / includes / api / ApiFeedRecentChanges.php

<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @since 1.23
 */

/**
 * Recent changes feed.
 *
 * @ingroup API
 */
class ApiFeedRecentChanges extends ApiBase {

        private $params;

        /**
         * This module uses a custom feed wrapper printer.
         *
         * @return ApiFormatFeedWrapper
         */
        public function getCustomPrinter() {
                return new ApiFormatFeedWrapper( $this->getMain() );
        }

        /**
         * Format the rows (generated by SpecialRecentchanges or SpecialRecentchangeslinked)
         * as an RSS/Atom feed.
         */
        public function execute() {
                $config = $this->getConfig();

                $this->params = $this->extractRequestParams();

                if ( !$config->get( 'Feed' ) ) {
                        $this->dieUsage( 'Syndication feeds are not available', 'feed-unavailable' );
                }

                $feedClasses = $config->get( 'FeedClasses' );
                if ( !isset( $feedClasses[$this->params['feedformat']] ) ) {
                        $this->dieUsage( 'Invalid subscription feed type', 'feed-invalid' );
                }

                $this->getMain()->setCacheMode( 'public' );
                if ( !$this->getMain()->getParameter( 'smaxage' ) ) {
                        // bug 63249: This page gets hit a lot, cache at least 15 seconds.
                        $this->getMain()->setCacheMaxAge( 15 );
                }

                $feedFormat = $this->params['feedformat'];
                $specialClass = $this->params['target'] !== null
                        ? 'SpecialRecentchangeslinked'
                        : 'SpecialRecentchanges';

                $formatter = $this->getFeedObject( $feedFormat, $specialClass );

                // Parameters are passed via the request in the context… :(
                $context = new DerivativeContext( $this );
                $context->setRequest( new DerivativeRequest(
                        $this->getRequest(),
                        $this->params,
                        $this->getRequest()->wasPosted()
                ) );

                // The row-getting functionality should be factored out of ChangesListSpecialPage too…
                $rc = new $specialClass();
                $rc->setContext( $context );
                $rows = $rc->getRows();

                $feedItems = $rows ? ChangesFeed::buildItems( $rows ) : array();

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

        /**
         * Return a ChannelFeed object.
         *
         * @param string $feedFormat Feed's format (either 'rss' or 'atom')
         * @param string $specialClass Relevant special page name (either 'SpecialRecentchanges' or
         *     'SpecialRecentchangeslinked')
         * @return ChannelFeed
         */
        public function getFeedObject( $feedFormat, $specialClass ) {
                if ( $specialClass === 'SpecialRecentchangeslinked' ) {
                        $title = Title::newFromText( $this->params['target'] );
                        if ( !$title ) {
                                $this->dieUsageMsg( array( 'invalidtitle', $this->params['target'] ) );
                        }

                        $feed = new ChangesFeed( $feedFormat, false );
                        $feedObj = $feed->getFeedObject(
                                $this->msg( 'recentchangeslinked-title', $title->getPrefixedText() )
                                        ->inContentLanguage()->text(),
                                $this->msg( 'recentchangeslinked-feed' )->inContentLanguage()->text(),
                                SpecialPage::getTitleFor( 'Recentchangeslinked' )->getFullURL()
                        );
                } else {
                        $feed = new ChangesFeed( $feedFormat, 'rcfeed' );
                        $feedObj = $feed->getFeedObject(
                                $this->msg( 'recentchanges' )->inContentLanguage()->text(),
                                $this->msg( 'recentchanges-feed-description' )->inContentLanguage()->text(),
                                SpecialPage::getTitleFor( 'Recentchanges' )->getFullURL()
                        );
                }

                return $feedObj;
        }

        public function getAllowedParams() {
                $config = $this->getConfig();
                $feedFormatNames = array_keys( $config->get( 'FeedClasses' ) );

                $ret = array(
                        'feedformat' => array(
                                ApiBase::PARAM_DFLT => 'rss',
                                ApiBase::PARAM_TYPE => $feedFormatNames,
                        ),

                        'namespace' => array(
                                ApiBase::PARAM_TYPE => 'namespace',
                        ),
                        'invert' => false,
                        'associated' => false,

                        'days' => array(
                                ApiBase::PARAM_DFLT => 7,
                                ApiBase::PARAM_MIN => 1,
                                ApiBase::PARAM_TYPE => 'integer',
                        ),
                        'limit' => array(
                                ApiBase::PARAM_DFLT => 50,
                                ApiBase::PARAM_MIN => 1,
                                ApiBase::PARAM_MAX => $config->get( 'FeedLimit' ),
                                ApiBase::PARAM_TYPE => 'integer',
                        ),
                        'from' => array(
                                ApiBase::PARAM_TYPE => 'timestamp',
                        ),

                        'hideminor' => false,
                        'hidebots' => false,
                        'hideanons' => false,
                        'hideliu' => false,
                        'hidepatrolled' => false,
                        'hidemyself' => false,
                        'hidecategorization' => false,

                        'tagfilter' => array(
                                ApiBase::PARAM_TYPE => 'string',
                        ),

                        'target' => array(
                                ApiBase::PARAM_TYPE => 'string',
                        ),
                        'showlinkedto' => false,
                );

                if ( $config->get( 'AllowCategorizedRecentChanges' ) ) {
                        $ret += array(
                                'categories' => array(
                                        ApiBase::PARAM_TYPE => 'string',
                                        ApiBase::PARAM_ISMULTI => true,
                                ),
                                'categories_any' => false,
                        );
                }

                return $ret;
        }

        protected function getExamplesMessages() {
                return array(
                        'action=feedrecentchanges'
                                => 'apihelp-feedrecentchanges-example-simple',
                        'action=feedrecentchanges&days=30'
                                => 'apihelp-feedrecentchanges-example-30days',
                );
        }
}