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<?php
namespace SMW\Deserializers\DVDescriptionDeserializer;
use InvalidArgumentException;
use SMW\DataValueFactory;
use SMW\DataValues\MonolingualTextValue;
use SMW\Query\Language\Conjunction;
use SMW\Query\Language\SomeProperty;
use SMW\Query\Language\ThingDescription;
use SMW\Query\Language\ValueDescription;
use SMWDIBlob as DIBlob;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.4
*
* @author mwjames
*/
class MonolingualTextValueDescriptionDeserializer extends DescriptionDeserializer {
/**
* @since 2.4
*
* {@inheritDoc}
*/
public function isDeserializerFor( $serialization ) {
return $serialization instanceof MonolingualTextValue;
}
/**
* @since 2.4
*
* @param string $value
*
* @return Description
* @throws InvalidArgumentException
*/
public function deserialize( $value ) {
if ( !is_string( $value ) ) {
throw new InvalidArgumentException( 'Value needs to be a string' );
}
if ( $value === '' ) {
$this->addError( wfMessage( 'smw_novalues' )->text() );
return new ThingDescription();
}
$subdescriptions = [];
list( $text, $languageCode ) = $this->dataValue->getValuesFromString( $value );
foreach ( $this->dataValue->getPropertyDataItems() as $property ) {
// If the DVFeature doesn't require a language code to be present then
// allow to skip it as conjunctive condition when it is empty
if (
( $languageCode === '' ) &&
( $property->getKey() === '_LCODE' ) &&
( !$this->dataValue->isEnabledFeature( SMW_DV_MLTV_LCODE ) ) ) {
continue;
}
$value = $property->getKey() === '_LCODE' ? $languageCode : $text;
$comparator = SMW_CMP_EQ;
$this->prepareValue( $value, $comparator );
// Directly use the DI instead of going through the DVFactory to
// avoid having ~zh-* being validated when building a DV
// If one of the values is empty use, ? so queries can be arbitrary
// in respect of the query condition
$dataValue = DataValueFactory::getInstance()->newDataValueByItem(
new DIBlob( $value === '' ? '?' : $value ),
$property,
false,
$this->dataValue->getContextPage()
);
if ( !$dataValue->isValid() ) {
$this->addError( $dataValue->getErrors() );
continue;
}
$subdescriptions[] = $this->newSubdescription( $dataValue, $comparator );
}
return $this->getFinalDescriptionFor( $subdescriptions );
}
private function getFinalDescriptionFor( $subdescriptions ) {
$count = count( $subdescriptions );
if ( $count == 0 ) {
return new ThingDescription();
}
if ( $count == 1 ) {
return reset( $subdescriptions );
}
return new Conjunction( $subdescriptions );
}
private function newSubdescription( $dataValue, $comparator ) {
$description = new ValueDescription(
$dataValue->getDataItem(),
$dataValue->getProperty(),
$comparator
);
if ( $dataValue->getWikiValue() === '+' || $dataValue->getWikiValue() === '?' ) {
$description = new ThingDescription();
}
return new SomeProperty(
$dataValue->getProperty(),
$description
);
}
}
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