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                                 $status->value = $logid;
 185                         }
 186                 } else {
 187                         $status = Status::newFatal( 'cannotdelete',
 188                                 wfEscapeWikiText( $title->getPrefixedText() )
 189                         );
 190                         $page = WikiPage::factory( $title );
 191                         $dbw = wfGetDB( DB_MASTER );
 192                         try {
 193                                 $dbw->startAtomic( __METHOD__ );
 194                                 // delete the associated article first
 195                                 $error = '';
 196                                 $deleteStatus = $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user );
 197                                 // doDeleteArticleReal() returns a non-fatal error status if the page
 198                                 // or revision is missing, so check for isOK() rather than isGood()
 199                                 if ( $deleteStatus->isOK() ) {
 200                                         $status = $file->delete( $reason, $suppress, $user );
 201                                         if ( $status->isOK() ) {
 202                                                 $status->value = $deleteStatus->value; // log id
 203                                                 $dbw->endAtomic( __METHOD__ );
 204                                         } else {
 205                                                 // Page deleted but file still there? rollback page delete
 206                                                 $dbw->rollback( __METHOD__ );
 207                                         }
 208                                 } else {
 209                                         // Done; nothing changed
 210                                         $dbw->endAtomic( __METHOD__ );
 211                                 }
 212                         } catch ( Exception $e ) {
 213                                 // Rollback before returning to prevent UI from displaying
 214                                 // incorrect "View or restore N deleted edits?"
 215                                 $dbw->rollback( __METHOD__ );
 216                                 throw $e;
 217                         }
 218                 }
 219
 220                 if ( $status->isOK() ) {
 221                         Hooks::run( 'FileDeleteComplete', [ &$file, &$oldimage, &$page, &$user, &$reason ] );
 222                 }
 223
 224                 return $status;
 225         }
 226
 227         /**
 228          * Show the confirmation form
 229          */
 230         private function showForm() {
 231                 global $wgOut, $wgUser, $wgRequest;
 232
 233                 if ( $wgUser->isAllowed( 'suppressrevision' ) ) {
 234                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
 235                                         <td></td>
 236                                         <td class='mw-input'><strong>" .
 237                                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
 238                                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '3' ] ) .
 239                                         "</strong></td>
 240                                 </tr>";
 241                 } else {
 242                         $suppress = '';
 243                 }
 244
 245                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $wgUser->isWatched( $this->title );
 246                 $form = Xml::openElement( 'form', [ 'method' => 'post', 'action' => $this->getAction(),
 247                         'id' => 'mw-img-deleteconfirm' ] ) .
 248                         Xml::openElement( 'fieldset' ) .
 249                         Xml::element( 'legend', null, wfMessage( 'filedelete-legend' )->text() ) .
 250                         Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
 251                         $this->prepareMessage( 'filedelete-intro' ) .
 252                         Xml::openElement( 'table', [ 'id' => 'mw-img-deleteconfirm-table' ] ) .
 253                         "<tr>
 254                                 <td class='mw-label'>" .
 255                                         Xml::label( wfMessage( 'filedelete-comment' )->text(), 'wpDeleteReasonList' ) .
 256                                 "</td>
 257                                 <td class='mw-input'>" .
 258                                         Xml::listDropDown(
 259                                                 'wpDeleteReasonList',
 260                                                 wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->text(),
 261                                                 wfMessage( 'filedelete-reason-otherlist' )->inContentLanguage()->text(),
 262                                                 '',
 263                                                 'wpReasonDropDown',
 264                                                 1
 265                                         ) .
 266                                 "</td>
 267                         </tr>
 268                         <tr>
 269                                 <td class='mw-label'>" .
 270                                         Xml::label( wfMessage( 'filedelete-otherreason' )->text(), 'wpReason' ) .
 271                                 "</td>
 272                                 <td class='mw-input'>" .
 273                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
 274                                                 [ 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ] ) .
 275                                 "</td>
 276                         </tr>
 277                         {$suppress}";
 278                 if ( $wgUser->isLoggedIn() ) {
 279                         $form .= "
 280                         <tr>
 281                                 <td></td>
 282                                 <td class='mw-input'>" .
 283                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 284                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] ) .
 285                                 "</td>
 286                         </tr>";
 287                 }
 288                 $form .= "
 289                         <tr>
 290                                 <td></td>
 291                                 <td class='mw-submit'>" .
 292                                         Xml::submitButton(
 293                                                 wfMessage( 'filedelete-submit' )->text(),
 294                                                 [
 295                                                         'name' => 'mw-filedelete-submit',
 296                                                         'id' => 'mw-filedelete-submit',
 297                                                         'tabindex' => '4'
 298                                                 ]
 299                                         ) .
 300                                 "</td>
 301                         </tr>" .
 302                         Xml::closeElement( 'table' ) .
 303                         Xml::closeElement( 'fieldset' ) .
 304                         Xml::closeElement( 'form' );
 305
 306                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 307                                 $title = wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->getTitle();
 308                                 $link = Linker::linkKnown(
 309                                         $title,
 310                                         wfMessage( 'filedelete-edit-reasonlist' )->escaped(),
 311                                         [],
 312                                         [ 'action' => 'edit' ]
 313                                 );
 314                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 315                         }
 316
 317                 $wgOut->addHTML( $form );
 318         }
 319
 320         /**
 321          * Show deletion log fragments pertaining to the current file
 322          */
 323         private function showLogEntries() {
 324                 global $wgOut;
 325                 $deleteLogPage = new LogPage( 'delete' );
 326                 $wgOut->addHTML( '<h2>' . $deleteLogPage->getName()->escaped() . "</h2>\n" );
 327                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
 328         }
 329
 330         /**
 331          * Prepare a message referring to the file being deleted,
 332          * showing an appropriate message depending upon whether
 333          * it's a current file or an old version
 334          *
 335          * @param string $message Message base
 336          * @return string
 337          */
 338         private function prepareMessage( $message ) {
 339                 global $wgLang;
 340                 if ( $this->oldimage ) {
 341                         # Message keys used:
 342                         # 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 343                         return wfMessage(
 344                                 "{$message}-old",
 345                                 wfEscapeWikiText( $this->title->getText() ),
 346                                 $wgLang->date( $this->getTimestamp(), true ),
 347                                 $wgLang->time( $this->getTimestamp(), true ),
 348                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) )->parseAsBlock();
 349                 } else {
 350                         return wfMessage(
 351                                 $message,
 352                                 wfEscapeWikiText( $this->title->getText() )
 353                         )->parseAsBlock();
 354                 }
 355         }
 356
 357         /**
 358          * Set headers, titles and other bits
 359          */
 360         private function setHeaders() {
 361                 global $wgOut;
 362                 $wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
 363                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 364                 $wgOut->addBacklinkSubtitle( $this->title );
 365         }
 366
 367         /**
 368          * Is the provided `oldimage` value valid?
 369          *
 370          * @param string $oldimage
 371          * @return bool
 372          */
 373         public static function isValidOldSpec( $oldimage ) {
 374                 return strlen( $oldimage ) >= 16
 375                         && strpos( $oldimage, '/' ) === false
 376                         && strpos( $oldimage, '\\' ) === false;
 377         }
 378
 379         /**
 380          * Could we delete the file specified? If an `oldimage`
 381          * value was provided, does it correspond to an
 382          * existing, local, old version of this file?
 383          *
 384          * @param File $file
 385          * @param File $oldfile
 386          * @param File $oldimage
 387          * @return bool
 388          */
 389         public static function haveDeletableFile( &$file, &$oldfile, $oldimage ) {
 390                 return $oldimage
 391                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 392                         : $file && $file->exists() && $file->isLocal();
 393         }
 394
 395         /**
 396          * Prepare the form action
 397          *
 398          * @return string
 399          */
 400         private function getAction() {
 401                 $q = [];
 402                 $q['action'] = 'delete';
 403
 404                 if ( $this->oldimage ) {
 405                         $q['oldimage'] = $this->oldimage;
 406                 }
 407
 408                 return $this->title->getLocalURL( $q );
 409         }
 410
 411         /**
 412          * Extract the timestamp of the old version
 413          *
 414          * @return string
 415          */
 416         private function getTimestamp() {
 417                 return $this->oldfile->getTimestamp();
 418         }
 419 }