includes/FileDeleteForm.php

   1 <?php
   2
   3 /**
   4  * File deletion user interface
   5  *
   6  * @ingroup Media
   7  * @author Rob Church <robchur@gmail.com>
   8  */
   9 class FileDeleteForm {
  10
  11         /**
  12          * @var Title
  13          */
  14         private $title = null;
  15
  16         /**
  17          * @var File
  18          */
  19         private $file = null;
  20
  21         /**
  22          * @var File
  23          */
  24         private $oldfile = null;
  25         private $oldimage = '';
  26
  27         /**
  28          * Constructor
  29          *
  30          * @param $file File object we're deleting
  31          */
  32         public function __construct( $file ) {
  33                 $this->title = $file->getTitle();
  34                 $this->file = $file;
  35         }
  36
  37         /**
  38          * Fulfil the request; shows the form or deletes the file,
  39          * pending authentication, confirmation, etc.
  40          */
  41         public function execute() {
  42                 global $wgOut, $wgRequest, $wgUser, $wgUploadMaintenance;
  43
  44                 $permissionErrors = $this->title->getUserPermissionsErrors( 'delete', $wgUser );
  45                 if ( count( $permissionErrors ) ) {
  46                         throw new PermissionsError( 'delete', $permissionErrors );
  47                 }
  48
  49                 if ( wfReadOnly() ) {
  50                         throw new ReadOnlyError;
  51                 }
  52
  53                 if ( $wgUploadMaintenance ) {
  54                         throw new ErrorPageError( 'filedelete-maintenance-title', 'filedelete-maintenance' );
  55                 }
  56
  57                 $this->setHeaders();
  58
  59                 $this->oldimage = $wgRequest->getText( 'oldimage', false );
  60                 $token = $wgRequest->getText( 'wpEditToken' );
  61                 # Flag to hide all contents of the archived revisions
  62                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed('suppressrevision');
  63
  64                 if( $this->oldimage ) {
  65                         $this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage );
  66                 }
  67
  68                 if( !self::haveDeletableFile($this->file, $this->oldfile, $this->oldimage) ) {
  69                         $wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
  70                         $wgOut->addReturnTo( $this->title );
  71                         return;
  72                 }
  73
  74                 // Perform the deletion if appropriate
  75                 if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
  76                         $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
  77                         $deleteReason = $wgRequest->getText( 'wpReason' );
  78
  79                         if ( $deleteReasonList == 'other' ) {
  80                                 $reason = $deleteReason;
  81                         } elseif ( $deleteReason != '' ) {
  82                                 // Entry from drop down menu + additional comment
  83                                 $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
  84                         } else {
  85                                 $reason = $deleteReasonList;
  86                         }
  87
  88                         $status = self::doDelete( $this->title, $this->file, $this->oldimage, $reason, $suppress, $wgUser );
  89
  90                         if( !$status->isGood() ) {
  91                                 $wgOut->addHTML( '<h2>' . $this->prepareMessage( 'filedeleteerror-short' ) . "</h2>\n" );
  92                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) . '</div>' );
  93                         }
  94                         if( $status->ok ) {
  95                                 $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
  96                                 $wgOut->addHTML( $this->prepareMessage( 'filedelete-success' ) );
  97                                 // Return to the main page if we just deleted all versions of the
  98                                 // file, otherwise go back to the description page
  99                                 $wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
 100
 101                                 if ( $wgRequest->getCheck( 'wpWatch' ) && $wgUser->isLoggedIn() ) {
 102                                         WatchAction::doWatch( $this->title, $wgUser );
 103                                 } elseif ( $this->title->userIsWatching() ) {
 104                                         WatchAction::doUnwatch( $this->title, $wgUser );
 105                                 }
 106                         }
 107                         return;
 108                 }
 109
 110                 $this->showForm();
 111                 $this->showLogEntries();
 112         }
 113
 114         /**
 115          * Really delete the file
 116          *
 117          * @param $title Title object
 118          * @param File $file: file object
 119          * @param $oldimage String: archive name
 120          * @param $reason String: reason of the deletion
 121          * @param $suppress Boolean: whether to mark all deleted versions as restricted
 122          * @param $user User object performing the request
 123          * @return bool|Status
 124          */
 125         public static function doDelete( &$title, &$file, &$oldimage, $reason, $suppress, User $user = null ) {
 126                 if ( $user === null ) {
 127                         global $wgUser;
 128                         $user = $wgUser;
 129                 }
 130
 131                 if( $oldimage ) {
 132                         $page = null;
 133                         $status = $file->deleteOld( $oldimage, $reason, $suppress );
 134                         if( $status->ok ) {
 135                                 // Need to do a log item
 136                                 $log = new LogPage( 'delete' );
 137                                 $logComment = wfMsgForContent( 'deletedrevision', $oldimage );
 138                                 if( trim( $reason ) != '' ) {
 139                                         $logComment .= wfMsgForContent( 'colon-separator' ) . $reason;
 140                                 }
 141                                 $log->addEntry( 'delete', $title, $logComment );
 142                         }
 143                 } else {
 144                         $status = Status::newFatal( 'cannotdelete',
 145                                 wfEscapeWikiText( $title->getPrefixedText() )
 146                         );
 147                         $page = WikiPage::factory( $title );
 148                         $dbw = wfGetDB( DB_MASTER );
 149                         try {
 150                                 // delete the associated article first
 151                                 $error = '';
 152                                 if ( $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user ) >= WikiPage::DELETE_SUCCESS ) {
 153                                         $status = $file->delete( $reason, $suppress );
 154                                         if( $status->isOK() ) {
 155                                                 $dbw->commit( __METHOD__ );
 156                                         } else {
 157                                                 $dbw->rollback( __METHOD__ );
 158                                         }
 159                                 }
 160                         } catch ( MWException $e ) {
 161                                 // rollback before returning to prevent UI from displaying incorrect "View or restore N deleted edits?"
 162                                 $dbw->rollback( __METHOD__ );
 163                                 throw $e;
 164                         }
 165                 }
 166
 167                 if ( $status->isOK() ) {
 168                         wfRunHooks( 'FileDeleteComplete', array( &$file, &$oldimage, &$page, &$user, &$reason ) );
 169                 }
 170
 171                 return $status;
 172         }
 173
 174         /**
 175          * Show the confirmation form
 176          */
 177         private function showForm() {
 178                 global $wgOut, $wgUser, $wgRequest;
 179
 180                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 181                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
 182                                         <td></td>
 183                                         <td class='mw-input'><strong>" .
 184                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
 185                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '3' ) ) .
 186                                         "</strong></td>
 187                                 </tr>";
 188                 } else {
 189                         $suppress = '';
 190                 }
 191
 192                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->title->userIsWatching();
 193                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction(),
 194                         'id' => 'mw-img-deleteconfirm' ) ) .
 195                         Xml::openElement( 'fieldset' ) .
 196                         Xml::element( 'legend', null, wfMsg( 'filedelete-legend' ) ) .
 197                         Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
 198                         $this->prepareMessage( 'filedelete-intro' ) .
 199                         Xml::openElement( 'table', array( 'id' => 'mw-img-deleteconfirm-table' ) ) .
 200                         "<tr>
 201                                 <td class='mw-label'>" .
 202                                         Xml::label( wfMsg( 'filedelete-comment' ), 'wpDeleteReasonList' ) .
 203                                 "</td>
 204                                 <td class='mw-input'>" .
 205                                         Xml::listDropDown( 'wpDeleteReasonList',
 206                                                 wfMsgForContent( 'filedelete-reason-dropdown' ),
 207                                                 wfMsgForContent( 'filedelete-reason-otherlist' ), '', 'wpReasonDropDown', 1 ) .
 208                                 "</td>
 209                         </tr>
 210                         <tr>
 211                                 <td class='mw-label'>" .
 212                                         Xml::label( wfMsg( 'filedelete-otherreason' ), 'wpReason' ) .
 213                                 "</td>
 214                                 <td class='mw-input'>" .
 215                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
 216                                                 array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
 217                                 "</td>
 218                         </tr>
 219                         {$suppress}";
 220                 if( $wgUser->isLoggedIn() ) {
 221                         $form .= "
 222                         <tr>
 223                                 <td></td>
 224                                 <td class='mw-input'>" .
 225                                         Xml::checkLabel( wfMsg( 'watchthis' ),
 226                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
 227                                 "</td>
 228                         </tr>";
 229                 }
 230                 $form .= "
 231                         <tr>
 232                                 <td></td>
 233                                 <td class='mw-submit'>" .
 234                                         Xml::submitButton( wfMsg( 'filedelete-submit' ),
 235                                                 array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit', 'tabindex' => '4' ) ) .
 236                                 "</td>
 237                         </tr>" .
 238                         Xml::closeElement( 'table' ) .
 239                         Xml::closeElement( 'fieldset' ) .
 240                         Xml::closeElement( 'form' );
 241
 242                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 243                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Filedelete-reason-dropdown' );
 244                                 $link = Linker::link(
 245                                         $title,
 246                                         wfMsgHtml( 'filedelete-edit-reasonlist' ),
 247                                         array(),
 248                                         array( 'action' => 'edit' )
 249                                 );
 250                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 251                         }
 252
 253                 $wgOut->addHTML( $form );
 254         }
 255
 256         /**
 257          * Show deletion log fragments pertaining to the current file
 258          */
 259         private function showLogEntries() {
 260                 global $wgOut;
 261                 $wgOut->addHTML( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 262                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
 263         }
 264
 265         /**
 266          * Prepare a message referring to the file being deleted,
 267          * showing an appropriate message depending upon whether
 268          * it's a current file or an old version
 269          *
 270          * @param $message String: message base
 271          * @return String
 272          */
 273         private function prepareMessage( $message ) {
 274                 global $wgLang;
 275                 if( $this->oldimage ) {
 276                         return wfMsgExt(
 277                                 "{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 278                                 'parse',
 279                                 wfEscapeWikiText( $this->title->getText() ),
 280                                 $wgLang->date( $this->getTimestamp(), true ),
 281                                 $wgLang->time( $this->getTimestamp(), true ),
 282                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) );
 283                 } else {
 284                         return wfMsgExt(
 285                                 $message,
 286                                 'parse',
 287                                 wfEscapeWikiText( $this->title->getText() )
 288                         );
 289                 }
 290         }
 291
 292         /**
 293          * Set headers, titles and other bits
 294          */
 295         private function setHeaders() {
 296                 global $wgOut;
 297                 $wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
 298                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 299                 $wgOut->addBacklinkSubtitle( $this->title );
 300         }
 301
 302         /**
 303          * Is the provided `oldimage` value valid?
 304          *
 305          * @return bool
 306          */
 307         public static function isValidOldSpec($oldimage) {
 308                 return strlen( $oldimage ) >= 16
 309                         && strpos( $oldimage, '/' ) === false
 310                         && strpos( $oldimage, '\\' ) === false;
 311         }
 312
 313         /**
 314          * Could we delete the file specified? If an `oldimage`
 315          * value was provided, does it correspond to an
 316          * existing, local, old version of this file?
 317          *
 318          * @param $file File
 319          * @param $oldfile File
 320          * @param $oldimage File
 321          * @return bool
 322          */
 323         public static function haveDeletableFile(&$file, &$oldfile, $oldimage) {
 324                 return $oldimage
 325                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 326                         : $file && $file->exists() && $file->isLocal();
 327         }
 328
 329         /**
 330          * Prepare the form action
 331          *
 332          * @return string
 333          */
 334         private function getAction() {
 335                 $q = array();
 336                 $q['action'] = 'delete';
 337
 338                 if( $this->oldimage )
 339                         $q['oldimage'] = $this->oldimage;
 340
 341                 return $this->title->getLocalUrl( $q );
 342         }
 343
 344         /**
 345          * Extract the timestamp of the old version
 346          *
 347          * @return string
 348          */
 349         private function getTimestamp() {
 350                 return $this->oldfile->getTimestamp();
 351         }
 352 }