3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
19 use Wikimedia\Purtle\RdfWriter
;
20 use Wikimedia\Purtle\RdfWriterFactory
;
21 use Wikimedia\Rdbms\IDatabase
;
23 require_once __DIR__
. '/Maintenance.php';
26 * Maintenance script to provide RDF representation of the category tree.
28 * @ingroup Maintenance
31 class DumpCategoriesAsRdf
extends Maintenance
{
37 * Categories RDF helper.
40 private $categoriesRdf;
42 public function __construct() {
43 parent
::__construct();
45 $this->addDescription( "Generate RDF dump of categories in a wiki." );
47 $this->setBatchSize( 200 );
48 $this->addOption( 'output', "Output file (default is stdout). Will be overwritten.",
50 $this->addOption( 'format', "Set the dump format.", false, true );
54 * Produce row iterator for categories.
55 * @param IDatabase $dbr Database connection
56 * @return RecursiveIterator
58 public function getCategoryIterator( IDatabase
$dbr ) {
59 $it = new BatchRowIterator(
66 'page_namespace' => NS_CATEGORY
,
68 $it->setFetchColumns( [ 'page_title', 'page_id' ] );
73 * Get iterator for links for categories.
74 * @param IDatabase $dbr
75 * @param array $ids List of page IDs
78 public function getCategoryLinksIterator( IDatabase
$dbr, array $ids ) {
79 $it = new BatchRowIterator(
82 [ 'cl_from', 'cl_to' ],
86 'cl_type' => 'subcat',
89 $it->setFetchColumns( [ 'cl_from', 'cl_to' ] );
90 return new RecursiveIteratorIterator( $it );
93 public function addDumpHeader( $timestamp ) {
95 $licenseUrl = $wgRightsUrl;
96 if ( substr( $licenseUrl, 0, 2 ) == '//' ) {
97 $licenseUrl = 'https:' . $licenseUrl;
99 $this->rdfWriter
->about( $this->categoriesRdf
->getDumpURI() )
100 ->a( 'schema', 'Dataset' )
101 ->a( 'owl', 'Ontology' )
102 ->say( 'cc', 'license' )->is( $licenseUrl )
103 ->say( 'schema', 'softwareVersion' )->value( CategoriesRdf
::FORMAT_VERSION
)
104 ->say( 'schema', 'dateModified' )
105 ->value( wfTimestamp( TS_ISO_8601
, $timestamp ), 'xsd', 'dateTime' )
106 ->say( 'schema', 'isPartOf' )->is( wfExpandUrl( '/', PROTO_CANONICAL
) )
107 ->say( 'owl', 'imports' )->is( CategoriesRdf
::OWL_URL
);
110 public function execute() {
111 $outFile = $this->getOption( 'output', 'php://stdout' );
113 if ( $outFile === '-' ) {
114 $outFile = 'php://stdout';
117 $output = fopen( $outFile, 'w' );
118 $this->rdfWriter
= $this->createRdfWriter( $this->getOption( 'format', 'ttl' ) );
119 $this->categoriesRdf
= new CategoriesRdf( $this->rdfWriter
);
121 $this->categoriesRdf
->setupPrefixes();
122 $this->rdfWriter
->start();
124 $this->addDumpHeader( time() );
125 fwrite( $output, $this->rdfWriter
->drain() );
127 $dbr = $this->getDB( DB_REPLICA
, [ 'vslow' ] );
129 foreach ( $this->getCategoryIterator( $dbr ) as $batch ) {
131 foreach ( $batch as $row ) {
132 $this->categoriesRdf
->writeCategoryData( $row->page_title
);
133 $pages[$row->page_id
] = $row->page_title
;
136 foreach ( $this->getCategoryLinksIterator( $dbr, array_keys( $pages ) ) as $row ) {
137 $this->categoriesRdf
->writeCategoryLinkData( $pages[$row->cl_from
], $row->cl_to
);
139 fwrite( $output, $this->rdfWriter
->drain() );
142 if ( $outFile !== '-' ) {
148 * @param string $format Writer format
151 private function createRdfWriter( $format ) {
152 $factory = new RdfWriterFactory();
153 return $factory->getWriter( $factory->getFormatName( $format ) );
157 $maintClass = "DumpCategoriesAsRdf";
158 require_once RUN_MAINTENANCE_IF_MAIN
;