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