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 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( $this->title, $this->oldimage );
  87                 }
  88
  89                 if( !self::haveDeletableFile($this->file, $this->oldfile, $this->oldimage) ) {
  90                         $wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
  91                         $wgOut->addReturnTo( $this->title );
  92                         return;
  93                 }
  94
  95                 // Perform the deletion if appropriate
  96                 if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
  97                         $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
  98                         $deleteReason = $wgRequest->getText( 'wpReason' );
  99
 100                         if ( $deleteReasonList == 'other' ) {
 101                                 $reason = $deleteReason;
 102                         } elseif ( $deleteReason != '' ) {
 103                                 // Entry from drop down menu + additional comment
 104                                 $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
 105                         } else {
 106                                 $reason = $deleteReasonList;
 107                         }
 108
 109                         $status = self::doDelete( $this->title, $this->file, $this->oldimage, $reason, $suppress, $wgUser );
 110
 111                         if( !$status->isGood() ) {
 112                                 $wgOut->addHTML( '<h2>' . $this->prepareMessage( 'filedeleteerror-short' ) . "</h2>\n" );
 113                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) . '</div>' );
 114                         }
 115                         if( $status->ok ) {
 116                                 $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
 117                                 $wgOut->addHTML( $this->prepareMessage( 'filedelete-success' ) );
 118                                 // Return to the main page if we just deleted all versions of the
 119                                 // file, otherwise go back to the description page
 120                                 $wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
 121
 122                                 if ( $wgUser->isLoggedIn() && $wgRequest->getCheck( 'wpWatch' ) != $wgUser->isWatched( $this->title ) ) {
 123                                         if ( $wgRequest->getCheck( 'wpWatch' ) ) {
 124                                                 WatchAction::doWatch( $this->title, $wgUser );
 125                                         } else {
 126                                                 WatchAction::doUnwatch( $this->title, $wgUser );
 127                                         }
 128                                 }
 129                         }
 130                         return;
 131                 }
 132
 133                 $this->showForm();
 134                 $this->showLogEntries();
 135         }
 136
 137         /**
 138          * Really delete the file
 139          *
 140          * @param $title Title object
 141          * @param File $file: file object
 142          * @param $oldimage String: archive name
 143          * @param $reason String: reason of the deletion
 144          * @param $suppress Boolean: whether to mark all deleted versions as restricted
 145          * @param $user User object performing the request
 146          * @return bool|Status
 147          */
 148         public static function doDelete( &$title, &$file, &$oldimage, $reason, $suppress, User $user = null ) {
 149                 if ( $user === null ) {
 150                         global $wgUser;
 151                         $user = $wgUser;
 152                 }
 153
 154                 if( $oldimage ) {
 155                         $page = null;
 156                         $status = $file->deleteOld( $oldimage, $reason, $suppress );
 157                         if( $status->ok ) {
 158                                 // Need to do a log item
 159                                 $log = new LogPage( 'delete' );
 160                                 $logComment = wfMsgForContent( 'deletedrevision', $oldimage );
 161                                 if( trim( $reason ) != '' ) {
 162                                         $logComment .= wfMsgForContent( 'colon-separator' ) . $reason;
 163                                 }
 164                                 $log->addEntry( 'delete', $title, $logComment );
 165                         }
 166                 } else {
 167                         $status = Status::newFatal( 'cannotdelete',
 168                                 wfEscapeWikiText( $title->getPrefixedText() )
 169                         );
 170                         $page = WikiPage::factory( $title );
 171                         $dbw = wfGetDB( DB_MASTER );
 172                         try {
 173                                 // delete the associated article first
 174                                 $error = '';
 175                                 $deleteStatus = $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user );
 176                                 // doDeleteArticleReal() returns a non-fatal error status if the page
 177                                 // or revision is missing, so check for isOK() rather than isGood()
 178                                 if ( $deleteStatus->isOK() ) {
 179                                         $status = $file->delete( $reason, $suppress );
 180                                         if( $status->isOK() ) {
 181                                                 $dbw->commit( __METHOD__ );
 182                                         } else {
 183                                                 $dbw->rollback( __METHOD__ );
 184                                         }
 185                                 }
 186                         } catch ( MWException $e ) {
 187                                 // rollback before returning to prevent UI from displaying incorrect "View or restore N deleted edits?"
 188                                 $dbw->rollback( __METHOD__ );
 189                                 throw $e;
 190                         }
 191                 }
 192
 193                 if ( $status->isOK() ) {
 194                         wfRunHooks( 'FileDeleteComplete', array( &$file, &$oldimage, &$page, &$user, &$reason ) );
 195                 }
 196
 197                 return $status;
 198         }
 199
 200         /**
 201          * Show the confirmation form
 202          */
 203         private function showForm() {
 204                 global $wgOut, $wgUser, $wgRequest;
 205
 206                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 207                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
 208                                         <td></td>
 209                                         <td class='mw-input'><strong>" .
 210                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
 211                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '3' ) ) .
 212                                         "</strong></td>
 213                                 </tr>";
 214                 } else {
 215                         $suppress = '';
 216                 }
 217
 218                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $wgUser->isWatched( $this->title );
 219                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction(),
 220                         'id' => 'mw-img-deleteconfirm' ) ) .
 221                         Xml::openElement( 'fieldset' ) .
 222                         Xml::element( 'legend', null, wfMsg( 'filedelete-legend' ) ) .
 223                         Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
 224                         $this->prepareMessage( 'filedelete-intro' ) .
 225                         Xml::openElement( 'table', array( 'id' => 'mw-img-deleteconfirm-table' ) ) .
 226                         "<tr>
 227                                 <td class='mw-label'>" .
 228                                         Xml::label( wfMsg( 'filedelete-comment' ), 'wpDeleteReasonList' ) .
 229                                 "</td>
 230                                 <td class='mw-input'>" .
 231                                         Xml::listDropDown( 'wpDeleteReasonList',
 232                                                 wfMsgForContent( 'filedelete-reason-dropdown' ),
 233                                                 wfMsgForContent( 'filedelete-reason-otherlist' ), '', 'wpReasonDropDown', 1 ) .
 234                                 "</td>
 235                         </tr>
 236                         <tr>
 237                                 <td class='mw-label'>" .
 238                                         Xml::label( wfMsg( 'filedelete-otherreason' ), 'wpReason' ) .
 239                                 "</td>
 240                                 <td class='mw-input'>" .
 241                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
 242                                                 array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
 243                                 "</td>
 244                         </tr>
 245                         {$suppress}";
 246                 if( $wgUser->isLoggedIn() ) {
 247                         $form .= "
 248                         <tr>
 249                                 <td></td>
 250                                 <td class='mw-input'>" .
 251                                         Xml::checkLabel( wfMsg( 'watchthis' ),
 252                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
 253                                 "</td>
 254                         </tr>";
 255                 }
 256                 $form .= "
 257                         <tr>
 258                                 <td></td>
 259                                 <td class='mw-submit'>" .
 260                                         Xml::submitButton( wfMsg( 'filedelete-submit' ),
 261                                                 array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit', 'tabindex' => '4' ) ) .
 262                                 "</td>
 263                         </tr>" .
 264                         Xml::closeElement( 'table' ) .
 265                         Xml::closeElement( 'fieldset' ) .
 266                         Xml::closeElement( 'form' );
 267
 268                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 269                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Filedelete-reason-dropdown' );
 270                                 $link = Linker::link(
 271                                         $title,
 272                                         wfMsgHtml( 'filedelete-edit-reasonlist' ),
 273                                         array(),
 274                                         array( 'action' => 'edit' )
 275                                 );
 276                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 277                         }
 278
 279                 $wgOut->addHTML( $form );
 280         }
 281
 282         /**
 283          * Show deletion log fragments pertaining to the current file
 284          */
 285         private function showLogEntries() {
 286                 global $wgOut;
 287                 $wgOut->addHTML( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 288                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
 289         }
 290
 291         /**
 292          * Prepare a message referring to the file being deleted,
 293          * showing an appropriate message depending upon whether
 294          * it's a current file or an old version
 295          *
 296          * @param $message String: message base
 297          * @return String
 298          */
 299         private function prepareMessage( $message ) {
 300                 global $wgLang;
 301                 if( $this->oldimage ) {
 302                         return wfMsgExt(
 303                                 "{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 304                                 'parse',
 305                                 wfEscapeWikiText( $this->title->getText() ),
 306                                 $wgLang->date( $this->getTimestamp(), true ),
 307                                 $wgLang->time( $this->getTimestamp(), true ),
 308                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) );
 309                 } else {
 310                         return wfMsgExt(
 311                                 $message,
 312                                 'parse',
 313                                 wfEscapeWikiText( $this->title->getText() )
 314                         );
 315                 }
 316         }
 317
 318         /**
 319          * Set headers, titles and other bits
 320          */
 321         private function setHeaders() {
 322                 global $wgOut;
 323                 $wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
 324                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 325                 $wgOut->addBacklinkSubtitle( $this->title );
 326         }
 327
 328         /**
 329          * Is the provided `oldimage` value valid?
 330          *
 331          * @return bool
 332          */
 333         public static function isValidOldSpec($oldimage) {
 334                 return strlen( $oldimage ) >= 16
 335                         && strpos( $oldimage, '/' ) === false
 336                         && strpos( $oldimage, '\\' ) === false;
 337         }
 338
 339         /**
 340          * Could we delete the file specified? If an `oldimage`
 341          * value was provided, does it correspond to an
 342          * existing, local, old version of this file?
 343          *
 344          * @param $file File
 345          * @param $oldfile File
 346          * @param $oldimage File
 347          * @return bool
 348          */
 349         public static function haveDeletableFile(&$file, &$oldfile, $oldimage) {
 350                 return $oldimage
 351                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 352                         : $file && $file->exists() && $file->isLocal();
 353         }
 354
 355         /**
 356          * Prepare the form action
 357          *
 358          * @return string
 359          */
 360         private function getAction() {
 361                 $q = array();
 362                 $q['action'] = 'delete';
 363
 364                 if( $this->oldimage )
 365                         $q['oldimage'] = $this->oldimage;
 366
 367                 return $this->title->getLocalUrl( $q );
 368         }
 369
 370         /**
 371          * Extract the timestamp of the old version
 372          *
 373          * @return string
 374          */
 375         private function getTimestamp() {
 376                 return $this->oldfile->getTimestamp();
 377         }
 378 }