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  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 = 'nochange';
  86                         // Deprecated parameters
  87                         if ( $params['watch'] ) {
  88                                 $watch = 'watch';
  89                         } elseif ( $params['unwatch'] ) {
  90                                 $watch = 'unwatch';
  91                         } else {
  92                                 $watch = $params['watchlist'];
  93                         }
  94                         $this->setWatch( $watch, $titleObj, 'watchdeletion' );
  95                 }
  96
  97                 $r = array( 'title' => $titleObj->getPrefixedText(), 'reason' => $reason );
  98                 $this->getResult()->addValue( null, $this->getModuleName(), $r );
  99         }
 100
 101         private static function getPermissionsError( &$title, $token ) {
 102                 global $wgUser;
 103
 104                 // Check permissions
 105                 $errors = $title->getUserPermissionsErrors( 'delete', $wgUser );
 106                 if ( count( $errors ) > 0 ) {
 107                         return $errors;
 108                 }
 109
 110                 return array();
 111         }
 112
 113         /**
 114          * We have our own delete() function, since Article.php's implementation is split in two phases
 115          *
 116          * @param $article Article object to work on
 117          * @param $token String: delete token (same as edit token)
 118          * @param $reason String: reason for the deletion. Autogenerated if NULL
 119          * @return Title::getUserPermissionsErrors()-like array
 120          */
 121         public static function delete( &$article, $token, &$reason = null ) {
 122                 global $wgUser;
 123                 if ( $article->isBigDeletion() && !$wgUser->isAllowed( 'bigdelete' ) ) {
 124                         global $wgDeleteRevisionsLimit;
 125                         return array( array( 'delete-toobig', $wgDeleteRevisionsLimit ) );
 126                 }
 127                 $title = $article->getTitle();
 128                 $errors = self::getPermissionsError( $title, $token );
 129                 if ( count( $errors ) ) {
 130                         return $errors;
 131                 }
 132
 133                 // Auto-generate a summary, if necessary
 134                 if ( is_null( $reason ) ) {
 135                         // Need to pass a throwaway variable because generateReason expects
 136                         // a reference
 137                         $hasHistory = false;
 138                         $reason = $article->generateReason( $hasHistory );
 139                         if ( $reason === false ) {
 140                                 return array( array( 'cannotdelete' ) );
 141                         }
 142                 }
 143
 144                 $error = '';
 145                 if ( !wfRunHooks( 'ArticleDelete', array( &$article, &$wgUser, &$reason, $error ) ) ) {
 146                         return array( array( 'hookaborted', $error ) );
 147                 }
 148
 149                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 150                 if ( $article->doDeleteArticle( $reason ) ) {
 151                         wfRunHooks( 'ArticleDeleteComplete', array( &$article, &$wgUser, $reason, $article->getId() ) );
 152                         return array();
 153                 }
 154                 return array( array( 'cannotdelete', $article->mTitle->getPrefixedText() ) );
 155         }
 156
 157         public static function deleteFile( $token, &$title, $oldimage, &$reason = null, $suppress = false ) {
 158                 $errors = self::getPermissionsError( $title, $token );
 159                 if ( count( $errors ) ) {
 160                         return $errors;
 161                 }
 162
 163                 if ( $oldimage && !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
 164                         return array( array( 'invalidoldimage' ) );
 165                 }
 166
 167                 $file = wfFindFile( $title, array( 'ignoreRedirect' => true ) );
 168                 $oldfile = false;
 169
 170                 if ( $oldimage ) {
 171                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 172                 }
 173
 174                 if ( !FileDeleteForm::haveDeletableFile( $file, $oldfile, $oldimage ) ) {
 175                         return self::delete( new Article( $title ), $token, $reason );
 176                 }
 177                 if ( is_null( $reason ) ) { // Log and RC don't like null reasons
 178                         $reason = '';
 179                 }
 180                 $status = FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress );
 181
 182                 if ( !$status->isGood() ) {
 183                         return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 184                 }
 185
 186                 return array();
 187         }
 188
 189         public function mustBePosted() {
 190                 return true;
 191         }
 192
 193         public function isWriteMode() {
 194                 return true;
 195         }
 196
 197         public function getAllowedParams() {
 198                 return array(
 199                         'title' => null,
 200                         'pageid' => array(
 201                                 ApiBase::PARAM_TYPE => 'integer'
 202                         ),
 203                         'token' => null,
 204                         'reason' => null,
 205                         'watch' => array(
 206                                 ApiBase::PARAM_DFLT => false,
 207                                 ApiBase::PARAM_DEPRECATED => true,
 208                         ),
 209                         'watchlist' => array(
 210                                 ApiBase::PARAM_DFLT => 'preferences',
 211                                 ApiBase::PARAM_TYPE => array(
 212                                         'watch',
 213                                         'unwatch',
 214                                         'preferences',
 215                                         'nochange'
 216                                 ),
 217                         ),
 218                         'unwatch' => false,
 219                         'oldimage' => null
 220                 );
 221         }
 222
 223         public function getParamDescription() {
 224                 $p = $this->getModulePrefix();
 225                 return array(
 226                         'title' => "Title of the page you want to delete. Cannot be used together with {$p}pageid",
 227                         'pageid' => "Page ID of the page you want to delete. Cannot be used together with {$p}title",
 228                         'token' => 'A delete token previously retrieved through prop=info',
 229                         'reason' => 'Reason for the deletion. If not set, an automatically generated reason will be used',
 230                         'watch' => 'Add the page to your watchlist',
 231                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
 232                         'unwatch' => 'Remove the page from your watchlist',
 233                         'oldimage' => 'The name of the old image to delete as provided by iiprop=archivename'
 234                 );
 235         }
 236
 237         public function getDescription() {
 238                 return 'Delete a page';
 239         }
 240
 241         public function getPossibleErrors() {
 242                 return array_merge( parent::getPossibleErrors(), array(
 243                         array( 'invalidtitle', 'title' ),
 244                         array( 'nosuchpageid', 'pageid' ),
 245                         array( 'notanarticle' ),
 246                         array( 'hookaborted', 'error' ),
 247                 ) );
 248         }
 249
 250         public function getTokenSalt() {
 251                 return '';
 252         }
 253
 254         protected function getExamples() {
 255                 return array(
 256                         'api.php?action=delete&title=Main%20Page&token=123ABC',
 257                         'api.php?action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 258                 );
 259         }
 260
 261         public function getVersion() {
 262                 return __CLASS__ . ': $Id$';
 263         }
 264 }