includes/api/ApiDelete.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Jun 30, 2007
   6  *
   7  * Copyright © 2007 Roan Kattouw <Firstname>.<Lastname>@gmail.com
   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  * @file
  25  */
  26
  27 /**
  28  * API module that facilitates deleting pages. The API equivalent of action=delete.
  29  * Requires API write mode to be enabled.
  30  *
  31  * @ingroup API
  32  */
  33 class ApiDelete extends ApiBase {
  34
  35         public function __construct( $main, $action ) {
  36                 parent::__construct( $main, $action );
  37         }
  38
  39         /**
  40          * Extracts the title, token, and reason from the request parameters and invokes
  41          * the local delete() function with these as arguments. It does not make use of
  42          * the delete function specified by Article.php. If the deletion succeeds, the
  43          * details of the article deleted and the reason for deletion are added to the
  44          * result object.
  45          */
  46         public function execute() {
  47                 $params = $this->extractRequestParams();
  48
  49                 $this->requireOnlyOneParameter( $params, 'title', 'pageid' );
  50
  51                 if ( isset( $params['title'] ) ) {
  52                         $titleObj = Title::newFromText( $params['title'] );
  53                         if ( !$titleObj ) {
  54                                 $this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
  55                         }
  56                 } elseif ( isset( $params['pageid'] ) ) {
  57                         $titleObj = Title::newFromID( $params['pageid'] );
  58                         if ( !$titleObj ) {
  59                                 $this->dieUsageMsg( array( 'nosuchpageid', $params['pageid'] ) );
  60                         }
  61                 }
  62                 if ( !$titleObj->exists() ) {
  63                         $this->dieUsageMsg( 'notanarticle' );
  64                 }
  65
  66                 $reason = ( isset( $params['reason'] ) ? $params['reason'] : null );
  67                 $pageObj = WikiPage::factory( $titleObj );
  68                 $user = $this->getUser();
  69
  70                 if ( $titleObj->getNamespace() == NS_FILE ) {
  71                         $retval = self::deleteFile( $pageObj, $user, $params['token'], $params['oldimage'], $reason, false );
  72                 } else {
  73                         $retval = self::delete( $pageObj, $user, $params['token'], $reason );
  74                 }
  75
  76                 if ( count( $retval ) ) {
  77                         $this->dieUsageMsg( reset( $retval ) ); // We don't care about multiple errors, just report one of them
  78                 }
  79
  80                 // Deprecated parameters
  81                 if ( $params['watch'] ) {
  82                         $watch = 'watch';
  83                 } elseif ( $params['unwatch'] ) {
  84                         $watch = 'unwatch';
  85                 } else {
  86                         $watch = $params['watchlist'];
  87                 }
  88                 $this->setWatch( $watch, $titleObj, 'watchdeletion' );
  89
  90                 $r = array( 'title' => $titleObj->getPrefixedText(), 'reason' => $reason );
  91                 $this->getResult()->addValue( null, $this->getModuleName(), $r );
  92         }
  93
  94         /**
  95          * @param $title Title
  96          * @param $user User doing the action
  97          * @param $token String
  98          * @return array
  99          */
 100         private static function getPermissionsError( $title, $user, $token ) {
 101                 // Check permissions
 102                 return $title->getUserPermissionsErrors( 'delete', $user );
 103         }
 104
 105         /**
 106          * We have our own delete() function, since Article.php's implementation is split in two phases
 107          *
 108          * @param $page WikiPage object to work on
 109          * @param $user User doing the action
 110          * @param $token String: delete token (same as edit token)
 111          * @param $reason String: reason for the deletion. Autogenerated if NULL
 112          * @return Title::getUserPermissionsErrors()-like array
 113          */
 114         public static function delete( Page $page, User $user, $token, &$reason = null ) {
 115                 if ( $page->isBigDeletion() && !$user->isAllowed( 'bigdelete' ) ) {
 116                         global $wgDeleteRevisionsLimit;
 117                         return array( array( 'delete-toobig', $wgDeleteRevisionsLimit ) );
 118                 }
 119
 120                 $title = $page->getTitle();
 121                 $errors = self::getPermissionsError( $title, $user, $token );
 122                 if ( count( $errors ) ) {
 123                         return $errors;
 124                 }
 125
 126                 // Auto-generate a summary, if necessary
 127                 if ( is_null( $reason ) ) {
 128                         // Need to pass a throwaway variable because generateReason expects
 129                         // a reference
 130                         $hasHistory = false;
 131                         $reason = $page->getAutoDeleteReason( $hasHistory );
 132                         if ( $reason === false ) {
 133                                 return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 134                         }
 135                 }
 136
 137                 $error = '';
 138                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 139                 if ( $page->doDeleteArticle( $reason, false, 0, true, $error ) ) {
 140                         return array();
 141                 } else {
 142                         return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 143                 }
 144         }
 145
 146         /**
 147          * @param $page WikiPage object to work on
 148          * @param $user User doing the action
 149          * @param $token
 150          * @param $oldimage
 151          * @param $reason
 152          * @param $suppress bool
 153          * @return \type|array|Title
 154          */
 155         public static function deleteFile( Page $page, User $user, $token, $oldimage, &$reason = null, $suppress = false ) {
 156                 $title = $page->getTitle();
 157                 $errors = self::getPermissionsError( $title, $user, $token );
 158                 if ( count( $errors ) ) {
 159                         return $errors;
 160                 }
 161
 162                 $file = $page->getFile();
 163                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 164                         return self::delete( $page, $user, $token, $reason );
 165                 }
 166
 167                 if ( $oldimage ) {
 168                         if ( !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
 169                                 return array( array( 'invalidoldimage' ) );
 170                         }
 171                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 172                         if ( !$oldfile->exists() || !$oldfile->isLocal() || $oldfile->getRedirected() ) {
 173                                 return array( array( 'nodeleteablefile' ) );
 174                         }
 175                 } else {
 176                         $oldfile = false;
 177                 }
 178
 179                 if ( is_null( $reason ) ) { // Log and RC don't like null reasons
 180                         $reason = '';
 181                 }
 182                 $status = FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress );
 183                 if ( !$status->isGood() ) {
 184                         return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 185                 }
 186
 187                 return array();
 188         }
 189
 190         public function mustBePosted() {
 191                 return true;
 192         }
 193
 194         public function isWriteMode() {
 195                 return true;
 196         }
 197
 198         public function getAllowedParams() {
 199                 return array(
 200                         'title' => null,
 201                         'pageid' => array(
 202                                 ApiBase::PARAM_TYPE => 'integer'
 203                         ),
 204                         'token' => null,
 205                         'reason' => null,
 206                         'watch' => array(
 207                                 ApiBase::PARAM_DFLT => false,
 208                                 ApiBase::PARAM_DEPRECATED => true,
 209                         ),
 210                         'watchlist' => array(
 211                                 ApiBase::PARAM_DFLT => 'preferences',
 212                                 ApiBase::PARAM_TYPE => array(
 213                                         'watch',
 214                                         'unwatch',
 215                                         'preferences',
 216                                         'nochange'
 217                                 ),
 218                         ),
 219                         'unwatch' => array(
 220                                 ApiBase::PARAM_DFLT => false,
 221                                 ApiBase::PARAM_DEPRECATED => true,
 222                         ),
 223                         'oldimage' => null,
 224                 );
 225         }
 226
 227         public function getParamDescription() {
 228                 $p = $this->getModulePrefix();
 229                 return array(
 230                         'title' => "Title of the page you want to delete. Cannot be used together with {$p}pageid",
 231                         'pageid' => "Page ID of the page you want to delete. Cannot be used together with {$p}title",
 232                         'token' => 'A delete token previously retrieved through prop=info',
 233                         'reason' => 'Reason for the deletion. If not set, an automatically generated reason will be used',
 234                         'watch' => 'Add the page to your watchlist',
 235                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
 236                         'unwatch' => 'Remove the page from your watchlist',
 237                         'oldimage' => 'The name of the old image to delete as provided by iiprop=archivename'
 238                 );
 239         }
 240
 241         public function getDescription() {
 242                 return 'Delete a page';
 243         }
 244
 245         public function getPossibleErrors() {
 246                 return array_merge( parent::getPossibleErrors(),
 247                         $this->getRequireOnlyOneParameterErrorMessages( array( 'title', 'pageid' ) ),
 248                         array(
 249                                 array( 'invalidtitle', 'title' ),
 250                                 array( 'nosuchpageid', 'pageid' ),
 251                                 array( 'notanarticle' ),
 252                                 array( 'hookaborted', 'error' ),
 253                                 array( 'delete-toobig', 'limit' ),
 254                                 array( 'cannotdelete', 'title' ),
 255                                 array( 'invalidoldimage' ),
 256                                 array( 'nodeleteablefile' ),
 257                         )
 258                 );
 259         }
 260
 261         public function needsToken() {
 262                 return true;
 263         }
 264
 265         public function getTokenSalt() {
 266                 return '';
 267         }
 268
 269         public function getExamples() {
 270                 return array(
 271                         'api.php?action=delete&title=Main%20Page&token=123ABC',
 272                         'api.php?action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 273                 );
 274         }
 275
 276         public function getHelpUrls() {
 277                 return 'http://www.mediawiki.org/wiki/API:Delete';
 278         }
 279
 280         public function getVersion() {
 281                 return __CLASS__ . ': $Id$';
 282         }
 283 }