includes/specials/SpecialFileDuplicateSearch.php

   1 <?php
   2 /**
   3  * A special page to search for files by hash value as defined in the
   4  * img_sha1 field in the image table
   5  *
   6  * @file
   7  * @ingroup SpecialPage
   8  *
   9  * @author Raimond Spekking, based on Special:MIMESearch by Ævar Arnfjörð Bjarmason
  10  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  11  */
  12
  13 /**
  14  * Searches the database for files of the requested hash, comparing this with the
  15  * 'img_sha1' field in the image table.
  16  * @ingroup SpecialPage
  17  */
  18 class FileDuplicateSearchPage extends QueryPage {
  19         var $hash, $filename;
  20
  21         function FileDuplicateSearchPage( $hash, $filename ) {
  22                 $this->hash = $hash;
  23                 $this->filename = $filename;
  24         }
  25
  26         function getName() { return 'FileDuplicateSearch'; }
  27         function isExpensive() { return false; }
  28         function isSyndicated() { return false; }
  29
  30         function linkParameters() {
  31                 return array( 'filename' => $this->filename );
  32         }
  33
  34         function getSQL() {
  35                 $dbr = wfGetDB( DB_SLAVE );
  36                 $image = $dbr->tableName( 'image' );
  37                 $hash = $dbr->addQuotes( $this->hash );
  38
  39                 return "SELECT 'FileDuplicateSearch' AS type,
  40                                 img_name AS title,
  41                                 img_sha1 AS value,
  42                                 img_user_text,
  43                                 img_timestamp
  44                         FROM $image
  45                         WHERE img_sha1 = $hash
  46                         ";
  47         }
  48
  49         function formatResult( $skin, $result ) {
  50                 global $wgContLang, $wgLang;
  51
  52                 $nt = Title::makeTitle( NS_FILE, $result->title );
  53                 $text = $wgContLang->convert( $nt->getText() );
  54                 $plink = $skin->link(
  55                         Title::newFromText( $nt->getPrefixedText() ),
  56                         $text
  57                 );
  58
  59                 $user = $skin->link( Title::makeTitle( NS_USER, $result->img_user_text ), $result->img_user_text );
  60                 $time = $wgLang->timeanddate( $result->img_timestamp );
  61
  62                 return "$plink . . $user . . $time";
  63         }
  64 }
  65
  66 /**
  67  * Output the HTML search form, and constructs the FileDuplicateSearch object.
  68  */
  69 function wfSpecialFileDuplicateSearch( $par = null ) {
  70         global $wgRequest, $wgOut, $wgLang, $wgContLang, $wgScript;
  71
  72         $hash = '';
  73         $filename =  isset( $par ) ?  $par : $wgRequest->getText( 'filename' );
  74
  75         $title = Title::newFromText( $filename );
  76         if( $title && $title->getText() != '' ) {
  77                 $dbr = wfGetDB( DB_SLAVE );
  78                 $image = $dbr->tableName( 'image' );
  79                 $encFilename = $dbr->addQuotes( htmlspecialchars( $title->getDBkey() ) );
  80                 $sql = "SELECT img_sha1 from $image where img_name = $encFilename";
  81                 $res = $dbr->query( $sql );
  82                 $row = $dbr->fetchRow( $res );
  83                 if( $row !== false ) {
  84                         $hash = $row[0];
  85                 }
  86                 $dbr->freeResult( $res );
  87         }
  88
  89         # Create the input form
  90         $wgOut->addHTML(
  91                 Xml::openElement( 'form', array( 'id' => 'fileduplicatesearch', 'method' => 'get', 'action' => $wgScript ) ) .
  92                 Xml::hidden( 'title', SpecialPage::getTitleFor( 'FileDuplicateSearch' )->getPrefixedDbKey() ) .
  93                 Xml::openElement( 'fieldset' ) .
  94                 Xml::element( 'legend', null, wfMsg( 'fileduplicatesearch-legend' ) ) .
  95                 Xml::inputLabel( wfMsg( 'fileduplicatesearch-filename' ), 'filename', 'filename', 50, $filename ) . ' ' .
  96                 Xml::submitButton( wfMsg( 'fileduplicatesearch-submit' ) ) .
  97                 Xml::closeElement( 'fieldset' ) .
  98                 Xml::closeElement( 'form' )
  99         );
 100
 101         if( $hash != '' ) {
 102                 $align = $wgContLang->alignEnd();
 103
 104                 # Show a thumbnail of the file
 105                 $img = wfFindFile( $title );
 106                 if ( $img ) {
 107                         $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 108                         if( $thumb ) {
 109                                 $wgOut->addHTML( '<div style="float:' . $align . '" id="mw-fileduplicatesearch-icon">' .
 110                                         $thumb->toHtml( array( 'desc-link' => false ) ) . '<br />' .
 111                                         wfMsgExt( 'fileduplicatesearch-info', array( 'parse' ),
 112                                                 $wgLang->formatNum( $img->getWidth() ),
 113                                                 $wgLang->formatNum( $img->getHeight() ),
 114                                                 $wgLang->formatSize( $img->getSize() ),
 115                                                 $img->getMimeType()
 116                                         ) .
 117                                         '</div>' );
 118                         }
 119                 }
 120
 121                 # Do the query
 122                 $wpp = new FileDuplicateSearchPage( $hash, $filename );
 123                 list( $limit, $offset ) = wfCheckLimits();
 124                 $count = $wpp->doQuery( $offset, $limit );
 125
 126                 # Show a short summary
 127                 if( $count == 1 ) {
 128                         $wgOut->wrapWikiMsg(
 129                                 "<p class='mw-fileduplicatesearch-result-1'>\n$1\n</p>",
 130                                 array( 'fileduplicatesearch-result-1', $filename )
 131                         );
 132                 } elseif ( $count > 1 ) {
 133                         $wgOut->wrapWikiMsg(
 134                                 "<p class='mw-fileduplicatesearch-result-n'>\n$1\n</p>",
 135                                 array( 'fileduplicatesearch-result-n', $filename, $wgLang->formatNum( $count - 1 ) )
 136                         );
 137                 }
 138         }
 139 }