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         private $title = null;
  12         private $file = null;
  13
  14         private $oldfile = null;
  15         private $oldimage = '';
  16
  17         /**
  18          * Constructor
  19          *
  20          * @param File $file File we're deleting
  21          */
  22         public function __construct( $file ) {
  23                 $this->title = $file->getTitle();
  24                 $this->file = $file;
  25         }
  26
  27         /**
  28          * Fulfil the request; shows the form or deletes the file,
  29          * pending authentication, confirmation, etc.
  30          */
  31         public function execute() {
  32                 global $wgOut, $wgRequest, $wgUser;
  33                 $this->setHeaders();
  34
  35                 if( wfReadOnly() ) {
  36                         $wgOut->readOnlyPage();
  37                         return;
  38                 }
  39                 $permission_errors = $this->title->getUserPermissionsErrors('delete', $wgUser);
  40                 if (count($permission_errors)>0) {
  41                         $wgOut->showPermissionsErrorPage( $permission_errors );
  42                         return;
  43                 }
  44
  45                 $this->oldimage = $wgRequest->getText( 'oldimage', false );
  46                 $token = $wgRequest->getText( 'wpEditToken' );
  47                 # Flag to hide all contents of the archived revisions
  48                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed('suppressrevision');
  49
  50                 if( $this->oldimage && !self::isValidOldSpec($this->oldimage) ) {
  51                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars( $this->oldimage ) );
  52                         return;
  53                 }
  54                 if( $this->oldimage )
  55                         $this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage );
  56
  57                 if( !self::haveDeletableFile($this->file, $this->oldfile, $this->oldimage) ) {
  58                         $wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
  59                         $wgOut->addReturnTo( $this->title );
  60                         return;
  61                 }
  62
  63                 // Perform the deletion if appropriate
  64                 if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
  65                         $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
  66                         $this->DeleteReason = $wgRequest->getText( 'wpReason' );
  67                         $reason = $this->DeleteReasonList;
  68                         if ( $reason != 'other' && $this->DeleteReason != '') {
  69                                 // Entry from drop down menu + additional comment
  70                                 $reason .= ': ' . $this->DeleteReason;
  71                         } elseif ( $reason == 'other' ) {
  72                                 $reason = $this->DeleteReason;
  73                         }
  74
  75                         $status = self::doDelete( $this->title, $this->file, $this->oldimage, $reason, $suppress );
  76
  77                         if( !$status->isGood() )
  78                                 $wgOut->addWikiText( $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) );
  79                         if( $status->ok ) {
  80                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
  81                                 $wgOut->addHTML( $this->prepareMessage( 'filedelete-success' ) );
  82                                 // Return to the main page if we just deleted all versions of the
  83                                 // file, otherwise go back to the description page
  84                                 $wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
  85                         }
  86                         return;
  87                 }
  88
  89                 $this->showForm();
  90                 $this->showLogEntries();
  91         }
  92
  93         public static function doDelete( &$title, &$file, &$oldimage, $reason, $suppress ) {
  94                 $article = null;
  95                 if( $oldimage ) {
  96                         $status = $file->deleteOld( $oldimage, $reason, $suppress );
  97                         if( $status->ok ) {
  98                                 // Need to do a log item
  99                                 $log = new LogPage( 'delete' );
 100                                 $logComment = wfMsgForContent( 'deletedrevision', $oldimage );
 101                                 if( trim( $reason ) != '' )
 102                                         $logComment .= ": {$reason}";
 103                                         $log->addEntry( 'delete', $title, $logComment );
 104                         }
 105                 } else {
 106                         $status = $file->delete( $reason, $suppress );
 107                         if( $status->ok ) {
 108                                 $id = $title->getArticleID( GAID_FOR_UPDATE );
 109                                 // Need to delete the associated article
 110                                 $article = new Article( $title );
 111                                 if( wfRunHooks('ArticleDelete', array(&$article, &$wgUser, &$reason)) ) {
 112                                         if( $article->doDeleteArticle( $reason, $suppress, $id ) ) {
 113                                                 global $wgRequest;
 114                                                 if( $wgRequest->getCheck( 'wpWatch' ) ) {
 115                                                         $article->doWatch();
 116                                                 } elseif( $title->userIsWatching() ) {
 117                                                         $article->doUnwatch();
 118                                                 }
 119                                                 wfRunHooks('ArticleDeleteComplete', array(&$article, &$wgUser, $reason, $id));
 120                                         }
 121                                 }
 122                         }
 123                 }
 124                 if( $status->isGood() )
 125                         wfRunHooks('FileDeleteComplete', array( &$file, &$oldimage, &$article, &$wgUser, &$reason));
 126
 127                 return $status;
 128         }
 129
 130         /**
 131          * Show the confirmation form
 132          */
 133         private function showForm() {
 134                 global $wgOut, $wgUser, $wgRequest;
 135
 136                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
 137                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
 138                                         <td></td>
 139                                         <td class='mw-input'>" .
 140                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
 141                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '3' ) ) .
 142                                         "</td>
 143                                 </tr>";
 144                 } else {
 145                         $suppress = '';
 146                 }
 147
 148                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->title->userIsWatching();
 149                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction(),
 150                         'id' => 'mw-img-deleteconfirm' ) ) .
 151                         Xml::openElement( 'fieldset' ) .
 152                         Xml::element( 'legend', null, wfMsg( 'filedelete-legend' ) ) .
 153                         Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->oldimage ) ) .
 154                         $this->prepareMessage( 'filedelete-intro' ) .
 155                         Xml::openElement( 'table', array( 'id' => 'mw-img-deleteconfirm-table' ) ) .
 156                         "<tr>
 157                                 <td class='mw-label'>" .
 158                                         Xml::label( wfMsg( 'filedelete-comment' ), 'wpDeleteReasonList' ) .
 159                                 "</td>
 160                                 <td class='mw-input'>" .
 161                                         Xml::listDropDown( 'wpDeleteReasonList',
 162                                                 wfMsgForContent( 'filedelete-reason-dropdown' ),
 163                                                 wfMsgForContent( 'filedelete-reason-otherlist' ), '', 'wpReasonDropDown', 1 ) .
 164                                 "</td>
 165                         </tr>
 166                         <tr>
 167                                 <td class='mw-label'>" .
 168                                         Xml::label( wfMsg( 'filedelete-otherreason' ), 'wpReason' ) .
 169                                 "</td>
 170                                 <td class='mw-input'>" .
 171                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
 172                                                 array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
 173                                 "</td>
 174                         </tr>
 175                         {$suppress}
 176                         <tr>
 177                                 <td></td>
 178                                 <td class='mw-input'>" .
 179                                         Xml::checkLabel( wfMsg( 'watchthis' ),
 180                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
 181                                 "</td>
 182                         </tr>
 183                         <tr>
 184                                 <td></td>
 185                                 <td class='mw-submit'>" .
 186                                         Xml::submitButton( wfMsg( 'filedelete-submit' ),
 187                                                 array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit', 'tabindex' => '4' ) ) .
 188                                 "</td>
 189                         </tr>" .
 190                         Xml::closeElement( 'table' ) .
 191                         Xml::closeElement( 'fieldset' ) .
 192                         Xml::closeElement( 'form' );
 193
 194                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 195                                 $skin = $wgUser->getSkin();
 196                                 $link = $skin->makeLink ( 'MediaWiki:Filedelete-reason-dropdown', wfMsgHtml( 'filedelete-edit-reasonlist' ) );
 197                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 198                         }
 199
 200                 $wgOut->addHTML( $form );
 201         }
 202
 203         /**
 204          * Show deletion log fragments pertaining to the current file
 205          */
 206         private function showLogEntries() {
 207                 global $wgOut;
 208                 $wgOut->addHTML( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 209                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title->getPrefixedText() );
 210         }
 211
 212         /**
 213          * Prepare a message referring to the file being deleted,
 214          * showing an appropriate message depending upon whether
 215          * it's a current file or an old version
 216          *
 217          * @param string $message Message base
 218          * @return string
 219          */
 220         private function prepareMessage( $message ) {
 221                 global $wgLang;
 222                 if( $this->oldimage ) {
 223                         $url = $this->file->getArchiveUrl( $this->oldimage );
 224                         return wfMsgExt(
 225                                 "{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 226                                 'parse',
 227                                 $this->title->getText(),
 228                                 $wgLang->date( $this->getTimestamp(), true ),
 229                                 $wgLang->time( $this->getTimestamp(), true ),
 230                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ) ) );
 231                 } else {
 232                         return wfMsgExt(
 233                                 $message,
 234                                 'parse',
 235                                 $this->title->getText()
 236                         );
 237                 }
 238         }
 239
 240         /**
 241          * Set headers, titles and other bits
 242          */
 243         private function setHeaders() {
 244                 global $wgOut, $wgUser;
 245                 $wgOut->setPageTitle( wfMsg( 'filedelete', $this->title->getText() ) );
 246                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 247                 $wgOut->setSubtitle( wfMsg( 'filedelete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->title ) ) );
 248         }
 249
 250         /**
 251          * Is the provided `oldimage` value valid?
 252          *
 253          * @return bool
 254          */
 255         public static function isValidOldSpec($oldimage) {
 256                 return strlen( $oldimage ) >= 16
 257                         && strpos( $oldimage, '/' ) === false
 258                         && strpos( $oldimage, '\\' ) === false;
 259         }
 260
 261         /**
 262          * Could we delete the file specified? If an `oldimage`
 263          * value was provided, does it correspond to an
 264          * existing, local, old version of this file?
 265          *
 266          * @return bool
 267          */
 268         public static function haveDeletableFile(&$file, &$oldfile, $oldimage) {
 269                 return $oldimage
 270                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 271                         : $file && $file->exists() && $file->isLocal();
 272         }
 273
 274         /**
 275          * Prepare the form action
 276          *
 277          * @return string
 278          */
 279         private function getAction() {
 280                 $q = array();
 281                 $q[] = 'action=delete';
 282                 if( $this->oldimage )
 283                         $q[] = 'oldimage=' . urlencode( $this->oldimage );
 284                 return $this->title->getLocalUrl( implode( '&', $q ) );
 285         }
 286
 287         /**
 288          * Extract the timestamp of the old version
 289          *
 290          * @return string
 291          */
 292         private function getTimestamp() {
 293                 return $this->oldfile->getTimestamp();
 294         }
 295
 296 }