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<?php
namespace SMW\Query;
use SMW\Message;
use SMW\DIProperty;
use SMWInfolink as Infolink;
use SMWQuery as Query;
/**
* Representing a Special:Ask query link to further query results
*
* @since 2.4
*
* @author mwjames
*/
class QueryLinker {
/**
* @since 2.4
*
* @param Query $query
* @param array $parameters
*
* @return Infolink
*/
public static function get( Query $query, array $parameters = [] ) {
$link = Infolink::newInternalLink( '', ':Special:Ask', false, [] );
$link->setCompactLink( $GLOBALS['smwgCompactLinkSupport'] );
foreach ( $parameters as $key => $value ) {
if ( !is_string( $key ) ) {
continue;
}
$link->setParameter( $value, $key );
}
$params = self::getParameters( $query );
foreach ( $params as $key => $param ) {
$link->setParameter( $param, is_string( $key ) ? $key : false );
}
$link->setCaption(
' ' . Message::get( 'smw_iq_moreresults', Message::TEXT, Message::USER_LANGUAGE )
);
return $link;
}
private static function getParameters( $query ) {
$params = [ trim( $query->getQueryString( true ) ) ];
foreach ( $query->getExtraPrintouts() as /* PrintRequest */ $printout ) {
if ( ( $serialisation = $printout->getSerialisation( true ) ) !== '' ) {
$params[] = $serialisation;
}
}
if ( $query->getMainLabel() !== false ) {
$params['mainlabel'] = $query->getMainLabel();
}
if ( $query->getQuerySource() !== '' ) {
$params['source'] = $query->getQuerySource();
}
$params['offset'] = $query->getOffset();
if ( $params['offset'] === 0 ) {
unset( $params['offset'] );
}
if ( $query->getLimit() > 0 ) {
$params['limit'] = $query->getLimit();
}
$sortKeys = $query->getSortKeys();
$count = count( $sortKeys );
if ( $count == 0 ) {
return $params;
}
$order = [];
$sort = [];
foreach ( $sortKeys as $key => $order_by ) {
$order_by = strtolower( $order_by );
// Default mode, skip
if ( $count == 1 && $key === '' && $order_by === 'asc' ) {
continue;
}
// Avoid predefined properties to appear as key as in _MDAT
if ( $key !== '' && $key{0} === '_' ) {
$key = DIProperty::newFromUserLabel( $key )->getLabel();
} else {
$key = str_replace( '_', ' ', $key );
}
$order[] = $order_by;
$sort[] = $key;
}
if ( $sort !== [] ) {
$params['order'] = implode( ',', $order );
$params['sort'] = implode( ',', $sort );
}
return $params;
}
}
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