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          * Extracts the title and reason from the request parameters and invokes
  36          * the local delete() function with these as arguments. It does not make use of
  37          * the delete function specified by Article.php. If the deletion succeeds, the
  38          * details of the article deleted and the reason for deletion are added to the
  39          * result object.
  40          */
  41         public function execute() {
  42                 $this->useTransactionalTimeLimit();
  43
  44                 $params = $this->extractRequestParams();
  45
  46                 $pageObj = $this->getTitleOrPageId( $params, 'fromdbmaster' );
  47                 if ( !$pageObj->exists() ) {
  48                         $this->dieUsageMsg( 'notanarticle' );
  49                 }
  50
  51                 $titleObj = $pageObj->getTitle();
  52                 $reason = $params['reason'];
  53                 $user = $this->getUser();
  54
  55                 // Check that the user is allowed to carry out the deletion
  56                 $errors = $titleObj->getUserPermissionsErrors( 'delete', $user );
  57                 if ( count( $errors ) ) {
  58                         $this->dieUsageMsg( $errors[0] );
  59                 }
  60
  61                 // If change tagging was requested, check that the user is allowed to tag,
  62                 // and the tags are valid
  63                 if ( count( $params['tags'] ) ) {
  64                         $tagStatus = ChangeTags::canAddTagsAccompanyingChange( $params['tags'], $user );
  65                         if ( !$tagStatus->isOK() ) {
  66                                 $this->dieStatus( $tagStatus );
  67                         }
  68                 }
  69
  70                 if ( $titleObj->getNamespace() == NS_FILE ) {
  71                         $status = self::deleteFile(
  72                                 $pageObj,
  73                                 $user,
  74                                 $params['oldimage'],
  75                                 $reason,
  76                                 false
  77                         );
  78                 } else {
  79                         $status = self::delete( $pageObj, $user, $reason );
  80                 }
  81
  82                 if ( is_array( $status ) ) {
  83                         $this->dieUsageMsg( $status[0] );
  84                 }
  85                 if ( !$status->isGood() ) {
  86                         $this->dieStatus( $status );
  87                 }
  88
  89                 // Deprecated parameters
  90                 if ( $params['watch'] ) {
  91                         $this->logFeatureUsage( 'action=delete&watch' );
  92                         $watch = 'watch';
  93                 } elseif ( $params['unwatch'] ) {
  94                         $this->logFeatureUsage( 'action=delete&unwatch' );
  95                         $watch = 'unwatch';
  96                 } else {
  97                         $watch = $params['watchlist'];
  98                 }
  99                 $this->setWatch( $watch, $titleObj, 'watchdeletion' );
 100
 101                 // Apply change tags to the log entry, if requested
 102                 if ( count( $params['tags'] ) ) {
 103                         ChangeTags::addTags( $params['tags'], null, null, $status->value, null );
 104                 }
 105
 106                 $r = array(
 107                         'title' => $titleObj->getPrefixedText(),
 108                         'reason' => $reason,
 109                         'logid' => $status->value
 110                 );
 111                 $this->getResult()->addValue( null, $this->getModuleName(), $r );
 112         }
 113
 114         /**
 115          * We have our own delete() function, since Article.php's implementation is split in two phases
 116          *
 117          * @param Page|WikiPage $page Page or WikiPage object to work on
 118          * @param User $user User doing the action
 119          * @param string|null $reason Reason for the deletion. Autogenerated if null
 120          * @return Status|array
 121          */
 122         protected static function delete( Page $page, User $user, &$reason = null ) {
 123                 $title = $page->getTitle();
 124
 125                 // Auto-generate a summary, if necessary
 126                 if ( is_null( $reason ) ) {
 127                         // Need to pass a throwaway variable because generateReason expects
 128                         // a reference
 129                         $hasHistory = false;
 130                         $reason = $page->getAutoDeleteReason( $hasHistory );
 131                         if ( $reason === false ) {
 132                                 return array( array( 'cannotdelete', $title->getPrefixedText() ) );
 133                         }
 134                 }
 135
 136                 $error = '';
 137
 138                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 139                 return $page->doDeleteArticleReal( $reason, false, 0, true, $error, $user );
 140         }
 141
 142         /**
 143          * @param Page $page Object to work on
 144          * @param User $user User doing the action
 145          * @param string $oldimage Archive name
 146          * @param string $reason Reason for the deletion. Autogenerated if null.
 147          * @param bool $suppress Whether to mark all deleted versions as restricted
 148          * @return Status|array
 149          */
 150         protected static function deleteFile( Page $page, User $user, $oldimage,
 151                 &$reason = null, $suppress = false
 152         ) {
 153                 $title = $page->getTitle();
 154
 155                 $file = $page->getFile();
 156                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 157                         return self::delete( $page, $user, $reason );
 158                 }
 159
 160                 if ( $oldimage ) {
 161                         if ( !FileDeleteForm::isValidOldSpec( $oldimage ) ) {
 162                                 return array( array( 'invalidoldimage' ) );
 163                         }
 164                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 165                         if ( !$oldfile->exists() || !$oldfile->isLocal() || $oldfile->getRedirected() ) {
 166                                 return array( array( 'nodeleteablefile' ) );
 167                         }
 168                 }
 169
 170                 if ( is_null( $reason ) ) { // Log and RC don't like null reasons
 171                         $reason = '';
 172                 }
 173
 174                 return FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress, $user );
 175         }
 176
 177         public function mustBePosted() {
 178                 return true;
 179         }
 180
 181         public function isWriteMode() {
 182                 return true;
 183         }
 184
 185         public function getAllowedParams() {
 186                 return array(
 187                         'title' => null,
 188                         'pageid' => array(
 189                                 ApiBase::PARAM_TYPE => 'integer'
 190                         ),
 191                         'reason' => null,
 192                         'tags' => array(
 193                                 ApiBase::PARAM_TYPE => ChangeTags::listExplicitlyDefinedTags(),
 194                                 ApiBase::PARAM_ISMULTI => true,
 195                         ),
 196                         'watch' => array(
 197                                 ApiBase::PARAM_DFLT => false,
 198                                 ApiBase::PARAM_DEPRECATED => true,
 199                         ),
 200                         'watchlist' => array(
 201                                 ApiBase::PARAM_DFLT => 'preferences',
 202                                 ApiBase::PARAM_TYPE => array(
 203                                         'watch',
 204                                         'unwatch',
 205                                         'preferences',
 206                                         'nochange'
 207                                 ),
 208                         ),
 209                         'unwatch' => array(
 210                                 ApiBase::PARAM_DFLT => false,
 211                                 ApiBase::PARAM_DEPRECATED => true,
 212                         ),
 213                         'oldimage' => null,
 214                 );
 215         }
 216
 217         public function needsToken() {
 218                 return 'csrf';
 219         }
 220
 221         protected function getExamplesMessages() {
 222                 return array(
 223                         'action=delete&title=Main%20Page&token=123ABC'
 224                                 => 'apihelp-delete-example-simple',
 225                         'action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 226                                 => 'apihelp-delete-example-reason',
 227                 );
 228         }
 229
 230         public function getHelpUrls() {
 231                 return 'https://www.mediawiki.org/wiki/API:Delete';
 232         }
 233 }