SpecialFileDuplicateSearch.php

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<?php
class FileDuplicateSearchPage extends QueryPage {
        protected $hash = '', $filename = '';

        protected $file = null;

        function __construct( $name = 'FileDuplicateSearch' ) {
                parent::__construct( $name );
        }

        function isSyndicated() {
                return false;
        }

        function isCacheable() {
                return false;
        }

        function isCached() {
                return false;
        }

        function linkParameters() {
                return array( 'filename' => $this->filename );
        }

        function getDupes() {
                return RepoGroup::singleton()->findBySha1( $this->hash );
        }

        function showList( $dupes ) {
                $html = array();
                $html[] = $this->openList( 0 );

                foreach ( $dupes as $dupe ) {
                        $line = $this->formatResult( null, $dupe );
                        $html[] = "<li>" . $line . "</li>";
                }
                $html[] = $this->closeList();

                $this->getOutput()->addHtml( implode( "\n", $html ) );
        }

        function getQueryInfo() {
                return array(
                        'tables' => array( 'image' ),
                        'fields' => array(
                                'title' => 'img_name',
                                'value' => 'img_sha1',
                                'img_user_text',
                                'img_timestamp'
                        ),
                        'conds' => array( 'img_sha1' => $this->hash )
                );
        }

        function execute( $par ) {
                global $wgScript;

                $this->setHeaders();
                $this->outputHeader();

                $this->filename =  isset( $par ) ?  $par : $this->getRequest()->getText( 'filename' );
                $this->file = null;
                $this->hash = '';
                $title = Title::newFromText( $this->filename, NS_FILE );
                if( $title && $title->getText() != '' ) {
                        $this->file = wfFindFile( $title );
                }

                $out = $this->getOutput();

                # Create the input form
                $out->addHTML(
                        Xml::openElement( 'form', array( 'id' => 'fileduplicatesearch', 'method' => 'get', 'action' => $wgScript ) ) .
                        Html::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
                        Xml::openElement( 'fieldset' ) .
                        Xml::element( 'legend', null, $this->msg( 'fileduplicatesearch-legend' )->text() ) .
                        Xml::inputLabel( $this->msg( 'fileduplicatesearch-filename' )->text(), 'filename', 'filename', 50, $this->filename ) . ' ' .
                        Xml::submitButton( $this->msg( 'fileduplicatesearch-submit' )->text() ) .
                        Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' )
                );

                if( $this->file ) {
                        $this->hash = $this->file->getSha1();
                } elseif( $this->filename !== '' ) {
                        $out->wrapWikiMsg(
                                "<p class='mw-fileduplicatesearch-noresults'>\n$1\n</p>",
                                array( 'fileduplicatesearch-noresults', wfEscapeWikiText( $this->filename ) )
                        );
                }

                if( $this->hash != '' ) {
                        # Show a thumbnail of the file
                        $img = $this->file;
                        if ( $img ) {
                                $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
                                if( $thumb ) {
                                        $out->addHTML( '<div id="mw-fileduplicatesearch-icon">' .
                                                $thumb->toHtml( array( 'desc-link' => false ) ) . '<br />' .
                                                $this->msg( 'fileduplicatesearch-info' )->numParams(
                                                        $img->getWidth(), $img->getHeight() )->params(
                                                        $this->getLanguage()->formatSize( $img->getSize() ),
                                                        $img->getMimeType() )->parseAsBlock() .
                                                '</div>' );
                                }
                        }

                        $dupes = $this->getDupes();
                        $numRows = count( $dupes );

                        # Show a short summary
                        if( $numRows == 1 ) {
                                $out->wrapWikiMsg(
                                        "<p class='mw-fileduplicatesearch-result-1'>\n$1\n</p>",
                                        array( 'fileduplicatesearch-result-1', wfEscapeWikiText( $this->filename ) )
                                );
                        } elseif ( $numRows ) {
                                $out->wrapWikiMsg(
                                        "<p class='mw-fileduplicatesearch-result-n'>\n$1\n</p>",
                                        array( 'fileduplicatesearch-result-n', wfEscapeWikiText( $this->filename ),
                                                $this->getLanguage()->formatNum( $numRows - 1 ) )
                                );
                        }

                        $this->doBatchLookups( $dupes );
                        $this->showList( $dupes );
                }
        }

        function doBatchLookups( $list ) {
                $batch = new LinkBatch();
                foreach( $list as $file ) {
                        $batch->addObj( $file->getTitle() );
                        if( $file->isLocal() ) {
                                $userName = $file->getUser( 'text' );
                                $batch->add( NS_USER, $userName );
                                $batch->add( NS_USER_TALK, $userName );
                        }
                }
                $batch->execute();
        }

        function formatResult( $skin, $result ) {
                global $wgContLang;

                $nt = $result->getTitle();
                $text = $wgContLang->convert( $nt->getText() );
                $plink = Linker::link(
                        Title::newFromText( $nt->getPrefixedText() ),
                        $text
                );

                $userText = $result->getUser( 'text' );
                if ( $result->isLocal() ) {
                        $userId = $result->getUser( 'id' );
                        $user = Linker::userLink( $userId, $userText );
                        $user .= $this->getContext()->msg( 'word-separator' )->plain();
                        $user .= '<span style="white-space: nowrap;">';
                        $user .= Linker::userToolLinks( $userId, $userText );
                        $user .= '</span>';
                } else {
                        $user = htmlspecialchars( $userText );
                }

                $time = $this->getLanguage()->userTimeAndDate( $result->getTimestamp(), $this->getUser() );

                return "$plink . . $user . . $time";
        }
}