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<?php
namespace Maps\SemanticMW\ValueDescriptions;
use SMW\DataValueFactory;
use SMW\Query\Language\ValueDescription;
use SMWDIGeoCoord;
use Wikimedia\Rdbms\IDatabase;
/**
* Description of one data value of type Geographical Coordinates.
*
* @author Jeroen De Dauw
*/
class CoordinateDescription extends ValueDescription {
public function getQueryString( $asValue = false ) {
$queryString = DataValueFactory::getInstance()->newDataValueByItem(
$this->getDataItem(),
$this->getProperty()
)->getWikiValue();
return $asValue ? $queryString : "[[$queryString]]";
}
/**
* @see SomePropertyInterpreter::mapValueDescription
*
* FIXME: store specific code should be in the store component
*
* @param string $tableName
* @param string[] $fieldNames
* @param IDatabase $db
*
* @return string|false
*/
public function getSQLCondition( $tableName, array $fieldNames, IDatabase $db ) {
$dataItem = $this->getDataItem();
// Only execute the query when the description's type is geographical coordinates,
// the description is valid, and the near comparator is used.
if ( $dataItem instanceof SMWDIGeoCoord ) {
switch ( $this->getComparator() ) {
case SMW_CMP_EQ:
$comparator = '=';
break;
case SMW_CMP_LEQ:
$comparator = '<=';
break;
case SMW_CMP_GEQ:
$comparator = '>=';
break;
case SMW_CMP_NEQ:
$comparator = '!=';
break;
default:
return false;
}
$lat = $db->addQuotes( $dataItem->getLatitude() );
$lon = $db->addQuotes( $dataItem->getLongitude() );
$conditions = [];
$conditions[] = "{$tableName}.$fieldNames[1] $comparator $lat";
$conditions[] = "{$tableName}.$fieldNames[2] $comparator $lon";
return implode( ' AND ', $conditions );
}
return false;
}
}
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