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                         $wgOut->readOnlyPage();
  37                         return;
  38                 } elseif( !$wgUser->isLoggedIn() ) {
  39                         $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
  40                         return;
  41                 } elseif( !$wgUser->isAllowed( 'delete' ) ) {
  42                         $wgOut->permissionRequired( 'delete' );
  43                         return;
  44                 } elseif( $wgUser->isBlocked() ) {
  45                         $wgOut->blockedPage();
  46                         return;
  47                 }
  48
  49                 $this->oldimage = $wgRequest->getText( 'oldimage', false );
  50                 $token = $wgRequest->getText( 'wpEditToken' );
  51                 if( $this->oldimage && !$this->isValidOldSpec() ) {
  52                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars( $this->oldimage ) );
  53                         return;
  54                 }
  55                 if( $this->oldimage )
  56                         $this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage );
  57
  58                 if( !$this->haveDeletableFile() ) {
  59                         $wgOut->addHtml( $this->prepareMessage( 'filedelete-nofile' ) );
  60                         $wgOut->addReturnTo( $this->title );
  61                         return;
  62                 }
  63
  64                 // Perform the deletion if appropriate
  65                 if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
  66                         $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
  67                         $this->DeleteReason = $wgRequest->getText( 'wpReason' );
  68                         $reason = $this->DeleteReasonList;
  69                         if ( $reason != 'other' && $this->DeleteReason != '') {
  70                                 // Entry from drop down menu + additional comment
  71                                 $reason .= ': ' . $this->DeleteReason;
  72                         } elseif ( $reason == 'other' ) {
  73                                 $reason = $this->DeleteReason;
  74                         }
  75                         if( $this->oldimage ) {
  76                                 $status = $this->file->deleteOld( $this->oldimage, $reason );
  77                                 if( $status->ok ) {
  78                                         // Need to do a log item
  79                                         $log = new LogPage( 'delete' );
  80                                         $logComment = wfMsg( 'deletedrevision', $this->oldimage );
  81                                         if( trim( $reason ) != '' )
  82                                                 $logComment .= ": {$reason}";
  83                                         $log->addEntry( 'delete', $this->title, $logComment );
  84                                 }
  85                         } else {
  86                                 $status = $this->file->delete( $reason );
  87                                 if( $status->ok ) {
  88                                         // Need to delete the associated article
  89                                         $article = new Article( $this->title );
  90                                         $article->doDeleteArticle( $reason );
  91                                 }
  92                         }
  93                         if( !$status->isGood() )
  94                                 $wgOut->addWikiText( $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) );
  95                         if( $status->ok ) {
  96                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
  97                                 $wgOut->addHtml( $this->prepareMessage( 'filedelete-success' ) );
  98                                 // Return to the main page if we just deleted all versions of the
  99                                 // file, otherwise go back to the description page
 100                                 $wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
 101                         }
 102                         return;
 103                 }
 104
 105                 $this->showForm();
 106                 $this->showLogEntries();
 107         }
 108
 109         /**
 110          * Show the confirmation form
 111          */
 112         private function showForm() {
 113                 global $wgOut, $wgUser, $wgRequest, $wgContLang;
 114                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 115
 116                 $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction() ) ) .
 117                         Xml::openElement( 'fieldset' ) .
 118                         Xml::element( 'legend', null, wfMsg( 'filedelete-legend' ) ) .
 119                         Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->oldimage ) ) .
 120                         $this->prepareMessage( 'filedelete-intro' ) .
 121                         Xml::openElement( 'table' ) .
 122                         "<tr>
 123                                 <td align='$align'>" .
 124                                         Xml::label( wfMsg( 'filedelete-comment' ), 'wpDeleteReasonList' ) .
 125                                 "</td>
 126                                 <td>" .
 127                                         Xml::listDropDown( 'wpDeleteReasonList',
 128                                                 wfMsgForContent( 'filedelete-reason-dropdown' ),
 129                                                 wfMsgForContent( 'filedelete-reason-otherlist' ), '', 'wpReasonDropDown', 1 ) .
 130                                 "</td>
 131                         </tr>
 132                         <tr>
 133                                 <td align='$align'>" .
 134                                         Xml::label( wfMsg( 'filedelete-otherreason' ), 'wpReason' ) .
 135                                 "</td>
 136                                 <td>" .
 137                                         Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ), array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '1', 'id' => 'wpReason' ) ) .
 138                                 "</td>
 139                         </tr>
 140                         <tr>
 141                                 <td></td>
 142                                 <td>" .
 143                                         Xml::submitButton( wfMsg( 'filedelete-submit' ), array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit' ) ) .
 144                                 "</td>
 145                         </tr>" .
 146                         Xml::closeElement( 'table' ) .
 147                         Xml::closeElement( 'fieldset' ) .
 148                         Xml::closeElement( 'form' );
 149
 150                 $wgOut->addHtml( $form );
 151         }
 152
 153         /**
 154          * Show deletion log fragments pertaining to the current file
 155          */
 156         private function showLogEntries() {
 157                 global $wgOut;
 158                 $wgOut->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
 159                 $reader = new LogViewer(
 160                         new LogReader(
 161                                 new FauxRequest(
 162                                         array(
 163                                                 'type' => 'delete',
 164                                                 'page' => $this->title->getPrefixedText(),
 165                                         )
 166                                 )
 167                         )
 168                 );
 169                 $reader->showList( $wgOut );
 170         }
 171
 172         /**
 173          * Prepare a message referring to the file being deleted,
 174          * showing an appropriate message depending upon whether
 175          * it's a current file or an old version
 176          *
 177          * @param string $message Message base
 178          * @return string
 179          */
 180         private function prepareMessage( $message ) {
 181                 global $wgLang, $wgServer;
 182                 if( $this->oldimage ) {
 183                         return wfMsgExt(
 184                                 "{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
 185                                 'parse',
 186                                 $this->title->getText(),
 187                                 $wgLang->date( $this->getTimestamp(), true ),
 188                                 $wgLang->time( $this->getTimestamp(), true ),
 189                                 $wgServer . $this->file->getArchiveUrl( $this->oldimage )
 190                         );
 191                 } else {
 192                         return wfMsgExt(
 193                                 $message,
 194                                 'parse',
 195                                 $this->title->getText()
 196                         );
 197                 }
 198         }
 199
 200         /**
 201          * Set headers, titles and other bits
 202          */
 203         private function setHeaders() {
 204                 global $wgOut, $wgUser;
 205                 $wgOut->setPageTitle( wfMsg( 'filedelete', $this->title->getText() ) );
 206                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 207                 $wgOut->setSubtitle( wfMsg( 'filedelete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->title ) ) );
 208         }
 209
 210         /**
 211          * Is the provided `oldimage` value valid?
 212          *
 213          * @return bool
 214          */
 215         private function isValidOldSpec() {
 216                 return strlen( $this->oldimage ) >= 16
 217                         && strpos( $this->oldimage, '/' ) === false
 218                         && strpos( $this->oldimage, '\\' ) === false;
 219         }
 220
 221         /**
 222          * Could we delete the file specified? If an `oldimage`
 223          * value was provided, does it correspond to an
 224          * existing, local, old version of this file?
 225          *
 226          * @return bool
 227          */
 228         private function haveDeletableFile() {
 229                 return $this->oldimage
 230                         ? $this->oldfile && $this->oldfile->exists() && $this->oldfile->isLocal()
 231                         : $this->file && $this->file->exists() && $this->file->isLocal();
 232         }
 233
 234         /**
 235          * Prepare the form action
 236          *
 237          * @return string
 238          */
 239         private function getAction() {
 240                 $q = array();
 241                 $q[] = 'action=delete';
 242                 if( $this->oldimage )
 243                         $q[] = 'oldimage=' . urlencode( $this->oldimage );
 244                 return $this->title->getLocalUrl( implode( '&', $q ) );
 245         }
 246
 247         /**
 248          * Extract the timestamp of the old version
 249          *
 250          * @return string
 251          */
 252         private function getTimestamp() {
 253                 return $this->oldfile->getTimestamp();
 254         }
 255
 256 }