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Diffstat (limited to 'www/wiki/extensions/SemanticMediaWiki/includes/specials/SMW_SpecialOWLExport.php')
| -rw-r--r-- | www/wiki/extensions/SemanticMediaWiki/includes/specials/SMW_SpecialOWLExport.php | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/includes/specials/SMW_SpecialOWLExport.php b/www/wiki/extensions/SemanticMediaWiki/includes/specials/SMW_SpecialOWLExport.php new file mode 100644 index 00000000..06884ffd --- /dev/null +++ b/www/wiki/extensions/SemanticMediaWiki/includes/specials/SMW_SpecialOWLExport.php @@ -0,0 +1,196 @@ +<?php + +/** + * This special page (Special:ExportRDF) for MediaWiki implements an OWL-export of semantic data, + * gathered both from the annotations in articles, and from metadata already + * present in the database. + * + * @ingroup SMWSpecialPage + * @ingroup SpecialPage + * + * @author Markus Krötzsch + * @author Jeroen De Dauw + */ +class SMWSpecialOWLExport extends SpecialPage { + + /// Export controller object to be used for serializing data + protected $export_controller; + + public function __construct() { + parent::__construct( 'ExportRDF' ); + } + + public function execute( $page ) { + $this->setHeaders(); + global $wgOut, $wgRequest; + + $wgOut->setPageTitle( wfMessage( 'exportrdf' )->text() ); + + // see if we can find something to export: + $page = is_null( $page ) ? $wgRequest->getVal( 'page' ) : rawurldecode( $page ); + $pages = false; + + if ( !is_null( $page ) || $wgRequest->getCheck( 'page' ) ) { + $page = is_null( $page ) ? $wgRequest->getCheck( 'text' ) : $page; + + if ( $page !== '' ) { + $pages = [ $page ]; + } + } + + if ( $pages === false && $wgRequest->getCheck( 'pages' ) ) { + $pageBlob = $wgRequest->getText( 'pages' ); + + if ( $pageBlob !== '' ) { + $pages = explode( "\n", $wgRequest->getText( 'pages' ) ); + } + } + + if ( $pages !== false ) { + $this->exportPages( $pages ); + return; + } else { + $offset = $wgRequest->getVal( 'offset' ); + + if ( isset( $offset ) ) { + $this->startRDFExport(); + $this->export_controller->printPageList( $offset ); + return; + } else { + $stats = $wgRequest->getVal( 'stats' ); + + if ( isset( $stats ) ) { + $this->startRDFExport(); + $this->export_controller->printWikiInfo(); + return; + } + } + } + + // Nothing exported yet; show user interface: + $this->showForm(); + } + + /** + * Create the HTML user interface for this special page. + */ + protected function showForm() { + global $wgOut, $wgUser, $smwgAllowRecursiveExport, $smwgExportBacklinks, $smwgExportAll; + + $html = '<form name="tripleSearch" action="" method="POST">' . "\n" . + '<p>' . wfMessage( 'smw_exportrdf_docu' )->text() . "</p>\n" . + '<input type="hidden" name="postform" value="1"/>' . "\n" . + '<textarea name="pages" cols="40" rows="10"></textarea><br />' . "\n"; + + if ( $wgUser->isAllowed( 'delete' ) || $smwgAllowRecursiveExport ) { + $html .= '<input type="checkbox" name="recursive" value="1" id="rec"> <label for="rec">' . wfMessage( 'smw_exportrdf_recursive' )->text() . '</label></input><br />' . "\n"; + } + + if ( $wgUser->isAllowed( 'delete' ) || $smwgExportBacklinks ) { + $html .= '<input type="checkbox" name="backlinks" value="1" default="true" id="bl"> <label for="bl">' . wfMessage( 'smw_exportrdf_backlinks' )->text() . '</label></input><br />' . "\n"; + } + + if ( $wgUser->isAllowed( 'delete' ) || $smwgExportAll ) { + $html .= '<br />'; + $html .= '<input type="text" name="date" value="' . date( DATE_W3C, mktime( 0, 0, 0, 1, 1, 2000 ) ) . '" id="date"> <label for="ea">' . wfMessage( 'smw_exportrdf_lastdate' )->text() . '</label></input><br />' . "\n"; + } + + $html .= '<br /><input type="submit" value="' . wfMessage( 'smw_exportrdf_submit' )->text() . "\"/>\n</form>"; + + $wgOut->addHTML( $html ); + } + + /** + * Prepare $wgOut for printing non-HTML data. + */ + protected function startRDFExport() { + global $wgOut, $wgRequest; + + $syntax = $wgRequest->getText( 'syntax' ); + + if ( $syntax === '' ) { + $syntax = $wgRequest->getVal( 'syntax' ); + } + + $wgOut->disable(); + ob_start(); + + if ( $syntax == 'turtle' ) { + $mimetype = 'application/x-turtle'; // may change to 'text/turtle' at some time, watch Turtle development + $serializer = new SMWTurtleSerializer(); + } else { // rdfxml as default + // Only use rdf+xml mimetype if explicitly requested (browsers do + // not support it by default). + // We do not add this parameter to RDF links within the export + // though; it is only meant to help some tools to see that HTML + // included resources are RDF (from there on they should be fine). + $mimetype = ( $wgRequest->getVal( 'xmlmime' ) == 'rdf' ) ? 'application/rdf+xml' : 'application/xml'; + $serializer = new SMWRDFXMLSerializer(); + } + + header( "Content-type: $mimetype; charset=UTF-8" ); + + $this->export_controller = new SMWExportController( $serializer ); + } + + /** + * Export the given pages to RDF. + * @param array $pages containing the string names of pages to be exported + */ + protected function exportPages( $pages ) { + global $wgRequest, $smwgExportBacklinks, $wgUser, $smwgAllowRecursiveExport; + + // Effect: assume "no" from missing parameters generated by checkboxes. + $postform = $wgRequest->getText( 'postform' ) == 1; + + $recursive = 0; // default, no recursion + $rec = $wgRequest->getText( 'recursive' ); + + if ( $rec === '' ) { + $rec = $wgRequest->getVal( 'recursive' ); + } + + if ( ( $rec == '1' ) && ( $smwgAllowRecursiveExport || $wgUser->isAllowed( 'delete' ) ) ) { + $recursive = 1; // users may be allowed to switch it on + } + + $backlinks = $smwgExportBacklinks; // default + $bl = $wgRequest->getText( 'backlinks' ); + + if ( $bl === '' ) { + // TODO: wtf? this does not make a lot of sense... + $bl = $wgRequest->getVal( 'backlinks' ); + } + + if ( ( $bl == '1' ) && ( $wgUser->isAllowed( 'delete' ) ) ) { + $backlinks = true; // admins can always switch on backlinks + } elseif ( ( $bl == '0' ) || ( '' == $bl && $postform ) ) { + $backlinks = false; // everybody can explicitly switch off backlinks + } + + $date = $wgRequest->getText( 'date' ); + if ( $date === '' ) { + $date = $wgRequest->getVal( 'date' ); + } + + if ( $date !== '' ) { + $timeint = strtotime( $date ); + $stamp = date( "YmdHis", $timeint ); + $date = $stamp; + } + + // If it is a redirect then we don't want to generate triples other than + // the redirect target information + if ( isset( $pages[0] ) && ( $title = Title::newFromText( $pages[0] ) ) !== null && $title->isRedirect() ) { + $backlinks = false; + } + + $this->startRDFExport(); + $this->export_controller->enableBacklinks( $backlinks ); + $this->export_controller->printPages( $pages, $recursive, $date ); + } + + protected function getGroupName() { + return 'smw_group'; + } +} |