includes/api/ApiDelete.php

   1 <?php
   2
   3 /*
   4  * Created on Jun 30, 2007
   5  * API for MediaWiki 1.8+
   6  *
   7  * Copyright (C) 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 /**
  32  * API module that facilitates deleting pages. The API eqivalent of action=delete.
  33  * Requires API write mode to be enabled.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiDelete extends ApiBase {
  38
  39         public function __construct($main, $action) {
  40                 parent :: __construct($main, $action);
  41         }
  42
  43         /**
  44          * Extracts the title, token, and reason from the request parameters and invokes
  45          * the local delete() function with these as arguments. It does not make use of
  46          * the delete function specified by Article.php. If the deletion succeeds, the
  47          * details of the article deleted and the reason for deletion are added to the
  48          * result object.
  49          */
  50         public function execute() {
  51                 global $wgUser;
  52                 $this->getMain()->requestWriteMode();
  53                 $params = $this->extractRequestParams();
  54
  55                 $this->requireOnlyOneParameter($params, 'title', 'pageid');
  56                 if(!isset($params['token']))
  57                         $this->dieUsageMsg(array('missingparam', 'token'));
  58
  59                 if(isset($params['title']))
  60                 {
  61                         $titleObj = Title::newFromText($params['title']);
  62                         if(!$titleObj)
  63                                 $this->dieUsageMsg(array('invalidtitle', $params['title']));
  64                 }
  65                 else if(isset($params['pageid']))
  66                 {
  67                         $titleObj = Title::newFromID($params['pageid']);
  68                         if(!$titleObj)
  69                                 $this->dieUsageMsg(array('nosuchpageid', $params['pageid']));
  70                 }
  71                 if(!$titleObj->exists())
  72                         $this->dieUsageMsg(array('notanarticle'));
  73
  74                 $reason = (isset($params['reason']) ? $params['reason'] : NULL);
  75                 if ($titleObj->getNamespace() == NS_FILE) {
  76                         $retval = self::deleteFile($params['token'], $titleObj, $params['oldimage'], $reason, false);
  77                         if(count($retval))
  78                                 // We don't care about multiple errors, just report one of them
  79                                 $this->dieUsageMsg(current($retval));
  80                 } else {
  81                         $articleObj = new Article($titleObj);
  82                         if($articleObj->isBigDeletion() && !$wgUser->isAllowed('bigdelete')) {
  83                                 global $wgDeleteRevisionsLimit;
  84                                 $this->dieUsageMsg(array('delete-toobig', $wgDeleteRevisionsLimit));
  85                         }
  86                         $retval = self::delete($articleObj, $params['token'], $reason);
  87
  88                         if(count($retval))
  89                                 // We don't care about multiple errors, just report one of them
  90                                 $this->dieUsageMsg(current($retval));
  91
  92                         if($params['watch'] || $wgUser->getOption('watchdeletion'))
  93                                 $articleObj->doWatch();
  94                         else if($params['unwatch'])
  95                                 $articleObj->doUnwatch();
  96                 }
  97
  98                 $r = array('title' => $titleObj->getPrefixedText(), 'reason' => $reason);
  99                 $this->getResult()->addValue(null, $this->getModuleName(), $r);
 100         }
 101
 102         private static function getPermissionsError(&$title, $token) {
 103                 global $wgUser;
 104
 105                 // Check permissions
 106                 $errors = $title->getUserPermissionsErrors('delete', $wgUser);
 107                 if (count($errors) > 0) return $errors;
 108
 109                 // Check token
 110                 if(!$wgUser->matchEditToken($token))
 111                         return array(array('sessionfailure'));
 112                 return array();
 113         }
 114
 115         /**
 116          * We have our own delete() function, since Article.php's implementation is split in two phases
 117          *
 118          * @param Article $article - Article object to work on
 119          * @param string $token - Delete token (same as edit token)
 120          * @param string $reason - Reason for the deletion. Autogenerated if NULL
 121          * @return Title::getUserPermissionsErrors()-like array
 122          */
 123         public static function delete(&$article, $token, &$reason = NULL)
 124         {
 125                 global $wgUser;
 126                 $title = $article->getTitle();
 127                 $errors = self::getPermissionsError($title, $token);
 128                 if (count($errors)) return $errors;
 129
 130                 // Auto-generate a summary, if necessary
 131                 if(is_null($reason))
 132                 {
 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                 $error = '';
 142                 if (!wfRunHooks('ArticleDelete', array(&$article, &$wgUser, &$reason, $error)))
 143                         $this->dieUsageMsg(array('hookaborted', $error));
 144
 145                 // Luckily, Article.php provides a reusable delete function that does the hard work for us
 146                 if($article->doDeleteArticle($reason)) {
 147                         wfRunHooks('ArticleDeleteComplete', array(&$article, &$wgUser, $reason, $article->getId()));
 148                         return array();
 149                 }
 150                 return array(array('cannotdelete', $article->mTitle->getPrefixedText()));
 151         }
 152
 153         public static function deleteFile($token, &$title, $oldimage, &$reason = NULL, $suppress = false)
 154         {
 155                 $errors = self::getPermissionsError($title, $token);
 156                 if (count($errors)) return $errors;
 157
 158                 if( $oldimage && !FileDeleteForm::isValidOldSpec($oldimage) )
 159                         return array(array('invalidoldimage'));
 160
 161                 $file = wfFindFile($title, false, FileRepo::FIND_IGNORE_REDIRECT);
 162                 $oldfile = false;
 163
 164                 if( $oldimage )
 165                         $oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $oldimage );
 166
 167                 if( !FileDeleteForm::haveDeletableFile($file, $oldfile, $oldimage) )
 168                         return array(array('nofile'));
 169                 if (is_null($reason)) # Log and RC don't like null reasons
 170                         $reason = '';
 171                 $status = FileDeleteForm::doDelete( $title, $file, $oldimage, $reason, $suppress );
 172
 173                 if( !$status->isGood() )
 174                         return array(array('cannotdelete', $title->getPrefixedText()));
 175
 176                 return array();
 177         }
 178
 179         public function mustBePosted() { return true; }
 180
 181         public function getAllowedParams() {
 182                 return array (
 183                         'title' => null,
 184                         'pageid' => array(
 185                                 ApiBase::PARAM_TYPE => 'integer'
 186                         ),
 187                         'token' => null,
 188                         'reason' => null,
 189                         'watch' => false,
 190                         'unwatch' => false,
 191                         'oldimage' => null
 192                 );
 193         }
 194
 195         public function getParamDescription() {
 196                 return array (
 197                         'title' => 'Title of the page you want to delete. Cannot be used together with pageid',
 198                         'pageid' => 'Page ID of the page you want to delete. Cannot be used together with title',
 199                         'token' => 'A delete token previously retrieved through prop=info',
 200                         'reason' => 'Reason for the deletion. If not set, an automatically generated reason will be used.',
 201                         'watch' => 'Add the page to your watchlist',
 202                         'unwatch' => 'Remove the page from your watchlist',
 203                         'oldimage' => 'The name of the old image to delete as provided by iiprop=archivename'
 204                 );
 205         }
 206
 207         public function getDescription() {
 208                 return array(
 209                         'Delete a page.'
 210                 );
 211         }
 212
 213         protected function getExamples() {
 214                 return array (
 215                         'api.php?action=delete&title=Main%20Page&token=123ABC',
 216                         'api.php?action=delete&title=Main%20Page&token=123ABC&reason=Preparing%20for%20move'
 217                 );
 218         }
 219
 220         public function getVersion() {
 221                 return __CLASS__ . ': $Id$';
 222         }
 223 }