includes/api/ApiDelete.php

   1 <?php
   2
   3 /**
   4  * Created on Jun 30, 2007
   5  * API for MediaWiki 1.8+
   6  *
   7  * Copyright © 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  */
  24
  25 if ( !defined( 'MEDIAWIKI' ) ) {
  26         // Eclipse helper - will be ignored in production
  27         require_once( "ApiBase.php" );
  28 }
  29
  30 /**
  31  * API module that facilitates deleting pages. The API eqivalent of action=delete.
  32  * Requires API write mode to be enabled.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiDelete extends ApiBase {
  37
  38         public function __construct( $main, $action ) {
  39                 parent::__construct( $main, $action );
  40         }
  41
  42         /**
  43          * Extracts the title, token, and reason from the request parameters and invokes
  44          * the local delete() function with these as arguments. It does not make use of
  45          * the delete function specified by Article.php. If the deletion succeeds, the
  46          * details of the article deleted and the reason for deletion are added to the
  47          * result object.
  48          */
  49         public function execute() {
  50                 global $wgUser;
  51
  52                 $params = $this->extractRequestParams();
  53
  54                 $this->requireOnlyOneParameter( $params, 'title', 'pageid' );
  55
  56                 if ( isset( $params['title'] ) ) {
  57                         $titleObj = Title::newFromText( $params['title'] );
  58                         if ( !$titleObj ) {
  59                                 $this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
  60                         }
  61                 } elseif ( isset( $params['pageid'] ) ) {
  62                         $titleObj = Title::newFromID( $params['pageid'] );
  63                         if ( !$titleObj ) {
  64                                 $this->dieUsageMsg( array( 'nosuchpageid', $params['pageid'] ) );
  65                         }
  66                 }
  67                 if ( !$titleObj->exists() ) {
  68                         $this->dieUsageMsg( array( 'notanarticle' ) );
  69                 }
  70
  71                 $reason = ( isset( $params['reason'] ) ? $params['reason'] : null );
  72                 if ( $titleObj->getNamespace() == NS_FILE ) {
  73                         $retval = self::deleteFile( $params['token'], $titleObj, $params['oldimage'], $reason, false );
  74                         if ( count( $retval ) ) {
  75                                 $this->dieUsageMsg( reset( $retval ) ); // We don't care about multiple errors, just report one of them
  76                         }
  77                 } else {
  78                         $articleObj = new Article( $titleObj );
  79                         $retval = self::delete( $articleObj, $params['token'], $reason );
  80
  81                         if ( count( $retval ) ) {
  82                                 $this->dieUsageMsg( reset( $retval ) ); // We don't care about multiple errors, just report one of them
  83                         }
  84
  85                         $watch = $this->getWatchlistValue( $params['watchlist'], $titleObj ) || $wgUser->getOption( 'watchdeletion' );
  86
  87                         // Deprecated parameters
  88                         if ( $params['watch'] || $watch ) {
  89                                 $articleObj->doWatch();
  90                         } elseif ( $params['unwatch'] || !$watch ) {
  91                                 $articleObj->doUnwatch();
  92                         }
  93                 }
  94
  95                 $r = array( 'title' => $titleObj->getPrefixedText(), 'reason' => $reason );
  96                 $this->getResult()->addValue( null, $this->getModuleName(), $r );
  97         }
  98
  99         private static function getPermissionsError( &$title, $token ) {
 100                 global $wgUser;
 101
 102                 // Check permissions
 103                 $errors = $title->getUserPermissionsErrors( 'delete', $wgUser );
 104                 if ( count( $errors ) > 0 ) {
 105                         return $errors;
 106                 }
 107
 108                 return array();
 109         }
 110
 111         /**
 112          * We have our own delete() function, since Article.php's implementation is split in two phases
 113          *
 114          * @param $article Article object to work on
 115          * @param $token String: delete token (same as edit token)
 116          * @param $reason String: reason for the deletion. Autogenerated if NULL
 117          * @return Title::getUserPermissionsErrors()-like array
 118          */
 119         public static function delete( &$article, $token, &$reason = null ) {
 120                 global $wgUser;
 121                 if ( $article->isBigDeletion() && !$wgUser->isAllowed( 'bigdelete' ) ) {
 122                         global $wgDeleteRevisionsLimit;
 123                         return array( array( 'delete-toobig', $wgDeleteRevisionsLimit ) );
 124                 }
 125                 $title = $article->getTitle();
 126                 $errors = self::getPermissionsError( $title, $token );
 127                 if ( count( $errors ) ) {
 128                         return $errors;
 129                 }
 130
 131                 // Auto-generate a summary, if necessary
 132                 if ( is_null( $reason ) ) {
 133                         // Need to pass a throwaway variable because generateReason expects
 134                         // a reference
 135                         $hasHistory = false;
 136                         $reason = $article->generateReason( $hasHistory );
 137                         if ( $reason === false ) {
 138                                 return array( array( 'cannotdelete' ) );
 139                         }
 140                 }
 141
 142                 $error = '';
 143                 if ( !wfRunHooks( 'ArticleDelete', array( &$article, &$wgUser, &$reason, $error ) ) ) {
 144                         $this->dieUsageMsg( array( 'hookaborted', $error ) );
 145                 }
 146
 147                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 148                 if ( $article->doDeleteArticle( $reason ) ) {
 149                         wfRunHooks( 'ArticleDeleteComplete', array( &$article, &$wgUser, $reason, $article->getId() ) );
 150                         return array();
 151                 }
 152                 return array( array( 'cannotdelete', $article->mTitle->getPrefixedText() ) );
 153         }
 154
 155         public static function deleteFile( $token, &$title, $oldimage, &$reason = null, $suppress = false ) {
 156                 $errors = self::getPermissionsError( $title, $token );
 157                 if ( count( $errors ) ) {
 158                         return $errors;
 159                 }
 160
 161                 if ( $oldimage && !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
 162                         return array( array( 'invalidoldimage' ) );
 163                 }
 164
 165                 $file = wfFindFile( $title, array( 'ignoreRedirect' => true ) );
 166                 $oldfile = false;
 167
 168                 if ( $oldimage ) {
 169                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 170                 }
 171
 172                 if ( !FileDeleteForm::haveDeletableFile( $file, $oldfile, $oldimage ) ) {
 173                         return self::delete( new Article( $title ), $token, $reason );
 174                 }
 175                 if ( is_null( $reason ) ) { // Log and RC don't like null reasons
 176                         $reason = '';
 177                 }
 178                 $status = FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress );
 179
 180                 if ( !$status->isGood() ) {
 181                         return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 182                 }
 183
 184                 return array();
 185         }
 186
 187         public function mustBePosted() {
 188                 return true;
 189         }
 190
 191         public function isWriteMode() {
 192                 return true;
 193         }
 194
 195         public function getAllowedParams() {
 196                 return array(
 197                         'title' => null,
 198                         'pageid' => array(
 199                                 ApiBase::PARAM_TYPE => 'integer'
 200                         ),
 201                         'token' => null,
 202                         'reason' => null,
 203                         'watch' => array(
 204                                 ApiBase::PARAM_DFLT => false,
 205                                 ApiBase::PARAM_DEPRECATED => true,
 206                         ),
 207                         'watchlist' => array(
 208                                 ApiBase::PARAM_DFLT => 'preferences',
 209                                 ApiBase::PARAM_TYPE => array(
 210                                         'watch',
 211                                         'unwatch',
 212                                         'preferences',
 213                                         'nochange'
 214                                 ),
 215                         ),
 216                         'unwatch' => false,
 217                         'oldimage' => null
 218                 );
 219         }
 220
 221         public function getParamDescription() {
 222                 return array(
 223                         'title' => 'Title of the page you want to delete. Cannot be used together with pageid',
 224                         'pageid' => 'Page ID of the page you want to delete. Cannot be used together with title',
 225                         'token' => 'A delete token previously retrieved through prop=info',
 226                         'reason' => 'Reason for the deletion. If not set, an automatically generated reason will be used.',
 227                         'watch' => 'Add the page to your watchlist',
 228                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
 229                         'unwatch' => 'Remove the page from your watchlist',
 230                         'oldimage' => 'The name of the old image to delete as provided by iiprop=archivename'
 231                 );
 232         }
 233
 234         public function getDescription() {
 235                 return array(
 236                         'Delete a page.'
 237                 );
 238         }
 239
 240         public function getPossibleErrors() {
 241                 return array_merge( parent::getPossibleErrors(), array(
 242                         array( 'invalidtitle', 'title' ),
 243                         array( 'nosuchpageid', 'pageid' ),
 244                         array( 'notanarticle' ),
 245                         array( 'hookaborted', 'error' ),
 246                 ) );
 247         }
 248
 249         public function getTokenSalt() {
 250                 return '';
 251         }
 252
 253         protected function getExamples() {
 254                 return array(
 255                         'api.php?action=delete&title=Main%20Page&token=123ABC',
 256                         'api.php?action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 257                 );
 258         }
 259
 260         public function getVersion() {
 261                 return __CLASS__ . ': $Id$';
 262         }
 263 }