Fixed spacing in db/debug/diff/externalstore/objectcache folder

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

<?php
/**
 *
 *
 * Created on Jun 30, 2007
 *
 * Copyright © 2007 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
 *
 * 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
 */

/**
 * API module that facilitates deleting pages. The API equivalent of action=delete.
 * Requires API write mode to be enabled.
 *
 * @ingroup API
 */
class ApiDelete extends ApiBase {

        /**
         * Extracts the title, token, and reason from the request parameters and invokes
         * the local delete() function with these as arguments. It does not make use of
         * the delete function specified by Article.php. If the deletion succeeds, the
         * details of the article deleted and the reason for deletion are added to the
         * result object.
         */
        public function execute() {
                $params = $this->extractRequestParams();

                $pageObj = $this->getTitleOrPageId( $params, 'fromdbmaster' );
                if ( !$pageObj->exists() ) {
                        $this->dieUsageMsg( 'notanarticle' );
                }

                $titleObj = $pageObj->getTitle();
                $reason = $params['reason'];
                $user = $this->getUser();

                if ( $titleObj->getNamespace() == NS_FILE ) {
                        $status = self::deleteFile( $pageObj, $user, $params['token'], $params['oldimage'], $reason, false );
                } else {
                        $status = self::delete( $pageObj, $user, $params['token'], $reason );
                }

                if ( is_array( $status ) ) {
                        $this->dieUsageMsg( $status[0] );
                }
                if ( !$status->isGood() ) {
                        $errors = $status->getErrorsArray();
                        $this->dieUsageMsg( $errors[0] ); // We don't care about multiple errors, just report one of them
                }

                // Deprecated parameters
                if ( $params['watch'] ) {
                        $watch = 'watch';
                } elseif ( $params['unwatch'] ) {
                        $watch = 'unwatch';
                } else {
                        $watch = $params['watchlist'];
                }
                $this->setWatch( $watch, $titleObj, 'watchdeletion' );

                $r = array(
                        'title' => $titleObj->getPrefixedText(),
                        'reason' => $reason,
                        'logid' => $status->value
                );
                $this->getResult()->addValue( null, $this->getModuleName(), $r );
        }

        /**
         * @param $title Title
         * @param $user User doing the action
         * @param $token String
         * @return array
         */
        private static function getPermissionsError( $title, $user, $token ) {
                // Check permissions
                return $title->getUserPermissionsErrors( 'delete', $user );
        }

        /**
         * We have our own delete() function, since Article.php's implementation is split in two phases
         *
         * @param $page Page|WikiPage object to work on
         * @param $user User doing the action
         * @param string $token delete token (same as edit token)
         * @param string|null $reason reason for the deletion. Autogenerated if NULL
         * @return Status|array
         */
        public static function delete( Page $page, User $user, $token, &$reason = null ) {
                $title = $page->getTitle();
                $errors = self::getPermissionsError( $title, $user, $token );
                if ( count( $errors ) ) {
                        return $errors;
                }

                // Auto-generate a summary, if necessary
                if ( is_null( $reason ) ) {
                        // Need to pass a throwaway variable because generateReason expects
                        // a reference
                        $hasHistory = false;
                        $reason = $page->getAutoDeleteReason( $hasHistory );
                        if ( $reason === false ) {
                                return array( array( 'cannotdelete', $title->getPrefixedText() ) );
                        }
                }

                $error = '';
                // Luckily, Article.php provides a reusable delete function that does the hard work for us
                return $page->doDeleteArticleReal( $reason, false, 0, true, $error );
        }

        /**
         * @param $page WikiPage|Page object to work on
         * @param $user User doing the action
         * @param $token
         * @param $oldimage
         * @param $reason
         * @param $suppress bool
         * @return Status|array
         */
        public static function deleteFile( Page $page, User $user, $token, $oldimage, &$reason = null, $suppress = false ) {
                $title = $page->getTitle();
                $errors = self::getPermissionsError( $title, $user, $token );
                if ( count( $errors ) ) {
                        return $errors;
                }

                $file = $page->getFile();
                if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
                        return self::delete( $page, $user, $token, $reason );
                }

                if ( $oldimage ) {
                        if ( !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
                                return array( array( 'invalidoldimage' ) );
                        }
                        $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
                        if ( !$oldfile->exists() || !$oldfile->isLocal() || $oldfile->getRedirected() ) {
                                return array( array( 'nodeleteablefile' ) );
                        }
                }

                if ( is_null( $reason ) ) { // Log and RC don't like null reasons
                        $reason = '';
                }
                return FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress, $user );
        }

        public function mustBePosted() {
                return true;
        }

        public function isWriteMode() {
                return true;
        }

        public function getAllowedParams() {
                return array(
                        'title' => null,
                        'pageid' => array(
                                ApiBase::PARAM_TYPE => 'integer'
                        ),
                        'token' => array(
                                ApiBase::PARAM_TYPE => 'string',
                                ApiBase::PARAM_REQUIRED => true
                        ),
                        'reason' => null,
                        'watch' => array(
                                ApiBase::PARAM_DFLT => false,
                                ApiBase::PARAM_DEPRECATED => true,
                        ),
                        'watchlist' => array(
                                ApiBase::PARAM_DFLT => 'preferences',
                                ApiBase::PARAM_TYPE => array(
                                        'watch',
                                        'unwatch',
                                        'preferences',
                                        'nochange'
                                ),
                        ),
                        'unwatch' => array(
                                ApiBase::PARAM_DFLT => false,
                                ApiBase::PARAM_DEPRECATED => true,
                        ),
                        'oldimage' => null,
                );
        }

        public function getParamDescription() {
                $p = $this->getModulePrefix();
                return array(
                        'title' => "Title of the page you want to delete. Cannot be used together with {$p}pageid",
                        'pageid' => "Page ID of the page you want to delete. Cannot be used together with {$p}title",
                        'token' => 'A delete token previously retrieved through prop=info',
                        'reason' => 'Reason for the deletion. If not set, an automatically generated reason will be used',
                        'watch' => 'Add the page to your watchlist',
                        'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
                        'unwatch' => 'Remove the page from your watchlist',
                        'oldimage' => 'The name of the old image to delete as provided by iiprop=archivename'
                );
        }

        public function getResultProperties() {
                return array(
                        '' => array(
                                'title' => 'string',
                                'reason' => 'string',
                                'logid' => 'integer'
                        )
                );
        }

        public function getDescription() {
                return 'Delete a page';
        }

        public function getPossibleErrors() {
                return array_merge( parent::getPossibleErrors(),
                        $this->getTitleOrPageIdErrorMessage(),
                        array(
                                array( 'notanarticle' ),
                                array( 'hookaborted', 'error' ),
                                array( 'delete-toobig', 'limit' ),
                                array( 'cannotdelete', 'title' ),
                                array( 'invalidoldimage' ),
                                array( 'nodeleteablefile' ),
                        )
                );
        }

        public function needsToken() {
                return true;
        }

        public function getTokenSalt() {
                return '';
        }

        public function getExamples() {
                return array(
                        'api.php?action=delete&title=Main%20Page&token=123ABC' => 'Delete the Main Page',
                        'api.php?action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move' => 'Delete the Main Page with the reason "Preparing for move"',
                );
        }

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