includes/FileDeleteForm.php

   1 <?php
   2
   3 /**
   4  * File deletion user interface
   5  *
   6  * @addtogroup 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('hiderevision');
  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                                 // Need to delete the associated article
 109                                 $article = new Article( $title );
 110                                 if( wfRunHooks('ArticleDelete', array(&$article, &$wgUser, &$reason)) ) {
 111                                         if( $article->doDeleteArticle( $reason, $suppress ) )
 112                                                 wfRunHooks('ArticleDeleteComplete', array(&$article, &$wgUser, $reason));
 113                                 }
 114                         }
 115                 }
 116                 if( $status->isGood() ) wfRunHooks('FileDeleteComplete', array(
 117                         &$file, &$oldimage, &$article, &$wgUser, &$reason));
 118
 119                 return $status;
 120         }
 121
 122         /**
 123          * Show the confirmation form
 124          */
 125         private function showForm() {
 126                 global $wgOut, $wgUser, $wgRequest, $wgContLang;
 127                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 128
 129                 if( $wgUser->isAllowed( 'hiderevision' ) ) {
 130                         $suppress = "<tr id=\"wpDeleteSuppressRow\" name=\"wpDeleteSuppressRow\"><td></td><td>";
 131                         $suppress .= Xml::checkLabel( wfMsg( 'revdelete-suppress' ), 'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '2' ) );
 132                         $suppress .= "</td></tr>";
 133                 } else {
 134                         $suppress = '';
 135                 }
 136
 137                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction() ) ) .
 138                         Xml::openElement( 'fieldset' ) .
 139                         Xml::element( 'legend', null, wfMsg( 'filedelete-legend' ) ) .
 140                         Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->oldimage ) ) .
 141                         $this->prepareMessage( 'filedelete-intro' ) .
 142                         Xml::openElement( 'table' ) .
 143                         "<tr>
 144                                 <td align='$align'>" .
 145                                         Xml::label( wfMsg( 'filedelete-comment' ), 'wpDeleteReasonList' ) .
 146                                 "</td>
 147                                 <td>" .
 148                                         Xml::listDropDown( 'wpDeleteReasonList',
 149                                                 wfMsgForContent( 'filedelete-reason-dropdown' ),
 150                                                 wfMsgForContent( 'filedelete-reason-otherlist' ), '', 'wpReasonDropDown', 1 ) .
 151                                 "</td>
 152                         </tr>
 153                         <tr>
 154                                 <td align='$align'>" .
 155                                         Xml::label( wfMsg( 'filedelete-otherreason' ), 'wpReason' ) .
 156                                 "</td>
 157                                 <td>" .
 158                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ), array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
 159                                 "</td>
 160                         </tr>
 161                         {$suppress}
 162                         <tr>
 163                                 <td></td>
 164                                 <td>" .
 165                                         Xml::submitButton( wfMsg( 'filedelete-submit' ), array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit', 'tabindex' => '3' ) ) .
 166                                 "</td>
 167                         </tr>" .
 168                         Xml::closeElement( 'table' ) .
 169                         Xml::closeElement( 'fieldset' ) .
 170                         Xml::closeElement( 'form' );
 171
 172                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
 173                                 $skin = $wgUser->getSkin();
 174                                 $link = $skin->makeLink ( 'MediaWiki:Filedelete-reason-dropdown', wfMsgHtml( 'filedelete-edit-reasonlist' ) );
 175                                 $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
 176                         }
 177
 178                 $wgOut->addHtml( $form );
 179         }
 180
 181         /**
 182          * Show deletion log fragments pertaining to the current file
 183          */
 184         private function showLogEntries() {
 185                 global $wgOut;
 186                 $wgOut->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 187                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->title->getPrefixedText() );
 188         }
 189
 190         /**
 191          * Prepare a message referring to the file being deleted,
 192          * showing an appropriate message depending upon whether
 193          * it's a current file or an old version
 194          *
 195          * @param string $message Message base
 196          * @return string
 197          */
 198         private function prepareMessage( $message ) {
 199                 global $wgLang;
 200                 if( $this->oldimage ) {
 201                         $url = $this->file->getArchiveUrl( $this->oldimage );
 202                         return wfMsgExt(
 203                                 "{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 204                                 'parse',
 205                                 $this->title->getText(),
 206                                 $wgLang->date( $this->getTimestamp(), true ),
 207                                 $wgLang->time( $this->getTimestamp(), true ),
 208                                 wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ) ) );
 209                 } else {
 210                         return wfMsgExt(
 211                                 $message,
 212                                 'parse',
 213                                 $this->title->getText()
 214                         );
 215                 }
 216         }
 217
 218         /**
 219          * Set headers, titles and other bits
 220          */
 221         private function setHeaders() {
 222                 global $wgOut, $wgUser;
 223                 $wgOut->setPageTitle( wfMsg( 'filedelete', $this->title->getText() ) );
 224                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 225                 $wgOut->setSubtitle( wfMsg( 'filedelete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->title ) ) );
 226         }
 227
 228         /**
 229          * Is the provided `oldimage` value valid?
 230          *
 231          * @return bool
 232          */
 233         public static function isValidOldSpec($oldimage) {
 234                 return strlen( $oldimage ) >= 16
 235                         && strpos( $oldimage, '/' ) === false
 236                         && strpos( $oldimage, '\\' ) === false;
 237         }
 238
 239         /**
 240          * Could we delete the file specified? If an `oldimage`
 241          * value was provided, does it correspond to an
 242          * existing, local, old version of this file?
 243          *
 244          * @return bool
 245          */
 246         public static function haveDeletableFile(&$file, &$oldfile, $oldimage) {
 247                 return $oldimage
 248                         ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
 249                         : $file && $file->exists() && $file->isLocal();
 250         }
 251
 252         /**
 253          * Prepare the form action
 254          *
 255          * @return string
 256          */
 257         private function getAction() {
 258                 $q = array();
 259                 $q[] = 'action=delete';
 260                 if( $this->oldimage )
 261                         $q[] = 'oldimage=' . urlencode( $this->oldimage );
 262                 return $this->title->getLocalUrl( implode( '&', $q ) );
 263         }
 264
 265         /**
 266          * Extract the timestamp of the old version
 267          *
 268          * @return string
 269          */
 270         private function getTimestamp() {
 271                 return $this->oldfile->getTimestamp();
 272         }
 273
 274 }