includes/api/ApiDelete.php

   1 <?php
   2 /**
   3  * Copyright © 2007 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * API module that facilitates deleting pages. The API equivalent of action=delete.
  25  * Requires API write mode to be enabled.
  26  *
  27  * @ingroup API
  28  */
  29 class ApiDelete extends ApiBase {
  30         /**
  31          * Extracts the title and reason from the request parameters and invokes
  32          * the local delete() function with these as arguments. It does not make use of
  33          * the delete function specified by Article.php. If the deletion succeeds, the
  34          * details of the article deleted and the reason for deletion are added to the
  35          * result object.
  36          */
  37         public function execute() {
  38                 $this->useTransactionalTimeLimit();
  39
  40                 $params = $this->extractRequestParams();
  41
  42                 $pageObj = $this->getTitleOrPageId( $params, 'fromdbmaster' );
  43                 $titleObj = $pageObj->getTitle();
  44                 if ( !$pageObj->exists() &&
  45                         !( $titleObj->getNamespace() == NS_FILE && self::canDeleteFile( $pageObj->getFile() ) )
  46                 ) {
  47                         $this->dieWithError( 'apierror-missingtitle' );
  48                 }
  49
  50                 $reason = $params['reason'];
  51                 $user = $this->getUser();
  52
  53                 // Check that the user is allowed to carry out the deletion
  54                 $this->checkTitleUserPermissions( $titleObj, 'delete' );
  55
  56                 // If change tagging was requested, check that the user is allowed to tag,
  57                 // and the tags are valid
  58                 if ( $params['tags'] ) {
  59                         $tagStatus = ChangeTags::canAddTagsAccompanyingChange( $params['tags'], $user );
  60                         if ( !$tagStatus->isOK() ) {
  61                                 $this->dieStatus( $tagStatus );
  62                         }
  63                 }
  64
  65                 if ( $titleObj->getNamespace() == NS_FILE ) {
  66                         $status = self::deleteFile(
  67                                 $pageObj,
  68                                 $user,
  69                                 $params['oldimage'],
  70                                 $reason,
  71                                 false,
  72                                 $params['tags']
  73                         );
  74                 } else {
  75                         $status = self::delete( $pageObj, $user, $reason, $params['tags'] );
  76                 }
  77
  78                 if ( !$status->isGood() ) {
  79                         $this->dieStatus( $status );
  80                 }
  81
  82                 // Deprecated parameters
  83                 if ( $params['watch'] ) {
  84                         $watch = 'watch';
  85                 } elseif ( $params['unwatch'] ) {
  86                         $watch = 'unwatch';
  87                 } else {
  88                         $watch = $params['watchlist'];
  89                 }
  90                 $this->setWatch( $watch, $titleObj, 'watchdeletion' );
  91
  92                 $r = [
  93                         'title' => $titleObj->getPrefixedText(),
  94                         'reason' => $reason,
  95                         'logid' => $status->value
  96                 ];
  97                 $this->getResult()->addValue( null, $this->getModuleName(), $r );
  98         }
  99
 100         /**
 101          * We have our own delete() function, since Article.php's implementation is split in two phases
 102          *
 103          * @param Page|WikiPage $page Page or WikiPage object to work on
 104          * @param User $user User doing the action
 105          * @param string|null &$reason Reason for the deletion. Autogenerated if null
 106          * @param array $tags Tags to tag the deletion with
 107          * @return Status
 108          */
 109         protected static function delete( Page $page, User $user, &$reason = null, $tags = [] ) {
 110                 $title = $page->getTitle();
 111
 112                 // Auto-generate a summary, if necessary
 113                 if ( is_null( $reason ) ) {
 114                         // Need to pass a throwaway variable because generateReason expects
 115                         // a reference
 116                         $hasHistory = false;
 117                         $reason = $page->getAutoDeleteReason( $hasHistory );
 118                         if ( $reason === false ) {
 119                                 // Should be reachable only if the page has no revisions
 120                                 return Status::newFatal( 'cannotdelete', $title->getPrefixedText() ); // @codeCoverageIgnore
 121                         }
 122                 }
 123
 124                 $error = '';
 125
 126                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 127                 return $page->doDeleteArticleReal( $reason, false, 0, true, $error, $user, $tags );
 128         }
 129
 130         /**
 131          * @param File $file
 132          * @return bool
 133          */
 134         protected static function canDeleteFile( File $file ) {
 135                 return $file->exists() && $file->isLocal() && !$file->getRedirected();
 136         }
 137
 138         /**
 139          * @param Page $page Object to work on
 140          * @param User $user User doing the action
 141          * @param string $oldimage Archive name
 142          * @param string &$reason Reason for the deletion. Autogenerated if null.
 143          * @param bool $suppress Whether to mark all deleted versions as restricted
 144          * @param array $tags Tags to tag the deletion with
 145          * @return Status
 146          */
 147         protected static function deleteFile( Page $page, User $user, $oldimage,
 148                 &$reason = null, $suppress = false, $tags = []
 149         ) {
 150                 $title = $page->getTitle();
 151
 152                 $file = $page->getFile();
 153                 if ( !self::canDeleteFile( $file ) ) {
 154                         return self::delete( $page, $user, $reason, $tags );
 155                 }
 156
 157                 if ( $oldimage ) {
 158                         if ( !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
 159                                 return Status::newFatal( 'invalidoldimage' );
 160                         }
 161                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 162                         if ( !$oldfile->exists() || !$oldfile->isLocal() || $oldfile->getRedirected() ) {
 163                                 return Status::newFatal( 'nodeleteablefile' );
 164                         }
 165                 }
 166
 167                 if ( is_null( $reason ) ) { // Log and RC don't like null reasons
 168                         $reason = '';
 169                 }
 170
 171                 return FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress, $user, $tags );
 172         }
 173
 174         public function mustBePosted() {
 175                 return true;
 176         }
 177
 178         public function isWriteMode() {
 179                 return true;
 180         }
 181
 182         public function getAllowedParams() {
 183                 return [
 184                         'title' => null,
 185                         'pageid' => [
 186                                 ApiBase::PARAM_TYPE => 'integer'
 187                         ],
 188                         'reason' => null,
 189                         'tags' => [
 190                                 ApiBase::PARAM_TYPE => 'tags',
 191                                 ApiBase::PARAM_ISMULTI => true,
 192                         ],
 193                         'watch' => [
 194                                 ApiBase::PARAM_DFLT => false,
 195                                 ApiBase::PARAM_DEPRECATED => true,
 196                         ],
 197                         'watchlist' => [
 198                                 ApiBase::PARAM_DFLT => 'preferences',
 199                                 ApiBase::PARAM_TYPE => [
 200                                         'watch',
 201                                         'unwatch',
 202                                         'preferences',
 203                                         'nochange'
 204                                 ],
 205                         ],
 206                         'unwatch' => [
 207                                 ApiBase::PARAM_DFLT => false,
 208                                 ApiBase::PARAM_DEPRECATED => true,
 209                         ],
 210                         'oldimage' => null,
 211                 ];
 212         }
 213
 214         public function needsToken() {
 215                 return 'csrf';
 216         }
 217
 218         protected function getExamplesMessages() {
 219                 return [
 220                         'action=delete&title=Main%20Page&token=123ABC'
 221                                 => 'apihelp-delete-example-simple',
 222                         'action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 223                                 => 'apihelp-delete-example-reason',
 224                 ];
 225         }
 226
 227         public function getHelpUrls() {
 228                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Delete';
 229         }
 230 }