includes/FileDeleteForm.php

   1 <?php
   2 /**
   3  * File deletion user interface.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @author Rob Church <robchur@gmail.com>
  22  * @ingroup Media
  23  */
  24
  25 /**
  26  * File deletion user interface
  27  *
  28  * @ingroup Media
  29  */
  30 class FileDeleteForm {
  31
  32         /**
  33          * @var Title
  34          */
  35         private $title = null;
  36
  37         /**
  38          * @var File
  39          */
  40         private $file = null;
  41
  42         /**
  43          * @var File
  44          */
  45         private $oldfile = null;
  46         private $oldimage = '';
  47
  48         /**
  49          * Constructor
  50          *
  51          * @param File $file File object we're deleting
  52          */
  53         public function __construct( $file ) {
  54                 $this->title = $file->getTitle();
  55                 $this->file = $file;
  56         }
  57
  58         /**
  59          * Fulfil the request; shows the form or deletes the file,
  60          * pending authentication, confirmation, etc.
  61          */
  62         public function execute() {
  63                 global $wgOut, $wgRequest, $wgUser, $wgUploadMaintenance;
  64
  65                 $permissionErrors = $this->title->getUserPermissionsErrors( 'delete', $wgUser );
  66                 if ( count( $permissionErrors ) ) {
  67                         throw new PermissionsError( 'delete', $permissionErrors );
  68                 }
  69
  70                 if ( wfReadOnly() ) {
  71                         throw new ReadOnlyError;
  72                 }
  73
  74                 if ( $wgUploadMaintenance ) {
  75                         throw new ErrorPageError( 'filedelete-maintenance-title', 'filedelete-maintenance' );
  76                 }
  77
  78                 $this->setHeaders();
  79
  80                 $this->oldimage = $wgRequest->getText( 'oldimage', false );
  81                 $token = $wgRequest->getText( 'wpEditToken' );
  82                 # Flag to hide all contents of the archived revisions
  83                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
  84
  85                 if ( $this->oldimage ) {
  86                         $this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName(
  87                                 $this->title,
  88                                 $this->oldimage
  89                         );
  90                 }
  91
  92                 if ( !self::haveDeletableFile( $this->file, $this->oldfile, $this->oldimage ) ) {
  93                         $wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
  94                         $wgOut->addReturnTo( $this->title );
  95                         return;
  96                 }
  97
  98                 // Perform the deletion if appropriate
  99                 if ( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
 100                         $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
 101                         $deleteReason = $wgRequest->getText( 'wpReason' );
 102
 103                         if ( $deleteReasonList == 'other' ) {
 104                                 $reason = $deleteReason;
 105                         } elseif ( $deleteReason != '' ) {
 106                                 // Entry from drop down menu + additional comment
 107                                 $reason = $deleteReasonList . wfMessage( 'colon-separator' )
 108                                         ->inContentLanguage()->text() . $deleteReason;
 109                         } else {
 110                                 $reason = $deleteReasonList;
 111                         }
 112
 113                         $status = self::doDelete(
 114                                 $this->title,
 115                                 $this->file,
 116                                 $this->oldimage,
 117                                 $reason,
 118                                 $suppress,
 119                                 $wgUser
 120                         );
 121
 122                         if ( !$status->isGood() ) {
 123                                 $wgOut->addHTML( '<h2>' . $this->prepareMessage( 'filedeleteerror-short' ) . "</h2>\n" );
 124                                 $wgOut->addWikiText( '<div class="error">' .
 125                                         $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' )
 126                                         . '</div>' );
 127                         }
 128                         if ( $status->ok ) {
 129                                 $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
 130                                 $wgOut->addHTML( $this->prepareMessage( 'filedelete-success' ) );
 131                                 // Return to the main page if we just deleted all versions of the
 132                                 // file, otherwise go back to the description page
 133                                 $wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
 134
 135                                 WatchAction::doWatchOrUnwatch( $wgRequest->getCheck( 'wpWatch' ), $this->title, $wgUser );
 136                         }
 137                         return;
 138                 }
 139
 140                 $this->showForm();
 141                 $this->showLogEntries();
 142         }
 143
 144         /**
 145          * Really delete the file
 146          *
 147          * @param Title $title
 148          * @param File $file
 149          * @param string $oldimage Archive name
 150          * @param string $reason Reason of the deletion
 151          * @param bool $suppress Whether to mark all deleted versions as restricted
 152          * @param User $user User object performing the request
 153          * @throws MWException
 154          * @return bool|Status
 155          */
 156         public static function doDelete( &$title, &$file, &$oldimage, $reason,
 157                 $suppress, User $user = null
 158         ) {
 159                 if ( $user === null ) {
 160                         global $wgUser;
 161                         $user = $wgUser;
 162                 }
 163
 164                 if ( $oldimage ) {
 165                         $page = null;
 166                         $status = $file->deleteOld( $oldimage, $reason, $suppress, $user );
 167                         if ( $status->ok ) {
 168                                 // Need to do a log item
 169                                 $logComment = wfMessage( 'deletedrevision', $oldimage )->inContentLanguage()->text();
 170                                 if ( trim( $reason ) != '' ) {
 171                                         $logComment .= wfMessage( 'colon-separator' )
 172                                                 ->inContentLanguage()->text() . $reason;
 173                                 }
 174
 175                                 $logtype = $suppress ? 'suppress' : 'delete';
 176
 177                                 $logEntry = new ManualLogEntry( $logtype, 'delete' );
 178                                 $logEntry->setPerformer( $user );
 179                                 $logEntry->setTarget( $title );
 180                                 $logEntry->setComment( $logComment );
 181                                 $logid = $logEntry->insert();
 182                                 $logEntry->publish( $logid );
 183                         }
 184                 } else {
 185                         $status = Status::newFatal( 'cannotdelete',
 186                                 wfEscapeWikiText( $title->getPrefixedText() )
 187                         );
 188                         $page = WikiPage::factory( $title );
 189                         $dbw = wfGetDB( DB_MASTER );
 190                         try {
 191                                 // delete the associated article first
 192                                 $error = '';
 193                                 $deleteStatus = $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user );
 194                                 // doDeleteArticleReal() returns a non-fatal error status if the page
 195                                 // or revision is missing, so check for isOK() rather than isGood()
 196                                 if ( $deleteStatus->isOK() ) {
 197                                         $status = $file->delete( $reason, $suppress, $user );
 198                                         if ( $status->isOK() ) {
 199                                                 $dbw->commit( __METHOD__ );
 200                                         } else {
 201                                                 $dbw->rollback( __METHOD__ );
 202                                         }
 203                                 }
 204                         } catch ( Exception $e ) {
 205                                 // Rollback before returning to prevent UI from displaying
 206                                 // incorrect "View or restore N deleted edits?"
 207                                 $dbw->rollback( __METHOD__ );
 208                                 throw $e;
 209                         }
 210                 }
 211
 212                 if ( $status->isOK() ) {
 213                         Hooks::run( 'FileDeleteComplete', array( &$file, &$oldimage, &$page, &$user, &$reason ) );
 214                 }
 215
 216                 return $status;
 217         }
 218
 219         /**
 220          * Show the confirmation form
 221          */
 222         private function showForm() {
 223                 global $wgOut, $wgUser, $wgRequest;
 224
 225                 if ( $wgUser->isAllowed( 'suppressrevision' ) ) {
 226                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
 227                                         <td></td>
 228                                         <td class='mw-input'><strong>" .
 229                                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
 230                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '3' ) ) .
 231                                         "</strong></td>
 232                                 </tr>";
 233                 } else {
 234                         $suppress = '';
 235                 }
 236
 237                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $wgUser->isWatched( $this->title );
 238                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction(),
 239                         'id' => 'mw-img-deleteconfirm' ) ) .
 240                         Xml::openElement( 'fieldset' ) .
 241                         Xml::element( 'legend', null, wfMessage( 'filedelete-legend' )->text() ) .
 242                         Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
 243                         $this->prepareMessage( 'filedelete-intro' ) .
 244                         Xml::openElement( 'table', array( 'id' => 'mw-img-deleteconfirm-table' ) ) .
 245                         "<tr>
 246                                 <td class='mw-label'>" .
 247                                         Xml::label( wfMessage( 'filedelete-comment' )->text(), 'wpDeleteReasonList' ) .
 248                                 "</td>
 249                                 <td class='mw-input'>" .
 250                                         Xml::listDropDown(
 251                                                 'wpDeleteReasonList',
 252                                                 wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->text(),
 253                                                 wfMessage( 'filedelete-reason-otherlist' )->inContentLanguage()->text(),
 254                                                 '',
 255                                                 'wpReasonDropDown',
 256                                                 1
 257                                         ) .
 258                                 "</td>
 259                         </tr>
 260                         <tr>
 261                                 <td class='mw-label'>" .
 262                                         Xml::label( wfMessage( 'filedelete-otherreason' )->text(), 'wpReason' ) .
 263                                 "</td>
 264                                 <td class='mw-input'>" .
 265                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
 266                                                 array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
 267                                 "</td>
 268                         </tr>
 269                         {$suppress}";
 270                 if ( $wgUser->isLoggedIn() ) {
 271                         $form .= "
 272                         <tr>
 273                                 <td></td>
 274                                 <td class='mw-input'>" .
 275                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 276                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
 277                                 "</td>
 278                         </tr>";
 279                 }
 280                 $form .= "
 281                         <tr>
 282                                 <td></td>
 283                                 <td class='mw-submit'>" .
 284                                         Xml::submitButton(
 285                                                 wfMessage( 'filedelete-submit' )->text(),
 286                                                 array(
 287                                                         'name' => 'mw-filedelete-submit',
 288                                                         'id' => 'mw-filedelete-submit',
 289                                                         'tabindex' => '4'
 290                                                 )
 291                                         ) .
 292                                 "</td>
 293                         </tr>" .
 294                         Xml::closeElement( 'table' ) .
 295                         Xml::closeElement( 'fieldset' ) .
 296                         Xml::closeElement( 'form' );
 297
 298                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 299                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Filedelete-reason-dropdown' );
 300                                 $link = Linker::link(
 301                                         $title,
 302                                         wfMessage( 'filedelete-edit-reasonlist' )->escaped(),
 303                                         array(),
 304                                         array( 'action' => 'edit' )
 305                                 );
 306                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 307                         }
 308
 309                 $wgOut->addHTML( $form );
 310         }
 311
 312         /**
 313          * Show deletion log fragments pertaining to the current file
 314          */
 315         private function showLogEntries() {
 316                 global $wgOut;
 317                 $deleteLogPage = new LogPage( 'delete' );
 318                 $wgOut->addHTML( '<h2>' . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 319                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
 320         }
 321
 322         /**
 323          * Prepare a message referring to the file being deleted,
 324          * showing an appropriate message depending upon whether
 325          * it's a current file or an old version
 326          *
 327          * @param string $message Message base
 328          * @return string
 329          */
 330         private function prepareMessage( $message ) {
 331                 global $wgLang;
 332                 if ( $this->oldimage ) {
 333                         # Message keys used:
 334                         # 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 335                         return wfMessage(
 336                                 "{$message}-old",
 337                                 wfEscapeWikiText( $this->title->getText() ),
 338                                 $wgLang->date( $this->getTimestamp(), true ),
 339                                 $wgLang->time( $this->getTimestamp(), true ),
 340                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) )->parseAsBlock();
 341                 } else {
 342                         return wfMessage(
 343                                 $message,
 344                                 wfEscapeWikiText( $this->title->getText() )
 345                         )->parseAsBlock();
 346                 }
 347         }
 348
 349         /**
 350          * Set headers, titles and other bits
 351          */
 352         private function setHeaders() {
 353                 global $wgOut;
 354                 $wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
 355                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 356                 $wgOut->addBacklinkSubtitle( $this->title );
 357         }
 358
 359         /**
 360          * Is the provided `oldimage` value valid?
 361          *
 362          * @param string $oldimage
 363          * @return bool
 364          */
 365         public static function isValidOldSpec( $oldimage ) {
 366                 return strlen( $oldimage ) >= 16
 367                         && strpos( $oldimage, '/' ) === false
 368                         && strpos( $oldimage, '\\' ) === false;
 369         }
 370
 371         /**
 372          * Could we delete the file specified? If an `oldimage`
 373          * value was provided, does it correspond to an
 374          * existing, local, old version of this file?
 375          *
 376          * @param File $file
 377          * @param File $oldfile
 378          * @param File $oldimage
 379          * @return bool
 380          */
 381         public static function haveDeletableFile( &$file, &$oldfile, $oldimage ) {
 382                 return $oldimage
 383                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 384                         : $file && $file->exists() && $file->isLocal();
 385         }
 386
 387         /**
 388          * Prepare the form action
 389          *
 390          * @return string
 391          */
 392         private function getAction() {
 393                 $q = array();
 394                 $q['action'] = 'delete';
 395
 396                 if ( $this->oldimage ) {
 397                         $q['oldimage'] = $this->oldimage;
 398                 }
 399
 400                 return $this->title->getLocalURL( $q );
 401         }
 402
 403         /**
 404          * Extract the timestamp of the old version
 405          *
 406          * @return string
 407          */
 408         private function getTimestamp() {
 409                 return $this->oldfile->getTimestamp();
 410         }
 411 }