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<?php
namespace SMW\Deserializers\DVDescriptionDeserializer;
use InvalidArgumentException;
use SMW\DataValueFactory;
use SMW\DataValues\ReferenceValue;
use SMW\Query\Language\Conjunction;
use SMW\Query\Language\SomeProperty;
use SMW\Query\Language\ThingDescription;
use SMWRecordValue as RecordValue;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.3
*
* @author mwjames
*/
class RecordValueDescriptionDeserializer extends DescriptionDeserializer {
/**
* @since 2.3
*
* {@inheritDoc}
*/
public function isDeserializerFor( $serialization ) {
return $serialization instanceof RecordValue || $serialization instanceof ReferenceValue;
}
/**
* @since 2.3
*
* @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 = [];
$values = $this->dataValue->getValuesFromString( $value );
$valueIndex = 0; // index in value array
$propertyIndex = 0; // index in property list
foreach ( $this->dataValue->getPropertyDataItems() as $diProperty ) {
// stop if there are no values left
if ( !is_array( $values ) || !array_key_exists( $valueIndex, $values ) ) {
break;
}
$description = $this->getDescriptionForProperty(
$diProperty,
$values,
$valueIndex,
$propertyIndex
);
if ( $description !== null ) {
$subdescriptions[] = $description;
}
++$propertyIndex;
}
if ( $subdescriptions === [] ) {
$this->addError( wfMessage( 'smw_novalues' )->text() );
}
return $this->getDescriptionFor( $subdescriptions );
}
private function getDescriptionFor( $subdescriptions ) {
switch ( count( $subdescriptions ) ) {
case 0:
return new ThingDescription();
case 1:
return reset( $subdescriptions );
default:
return new Conjunction( $subdescriptions );
}
}
private function getDescriptionForProperty( $diProperty, $values, &$valueIndex, $propertyIndex ) {
$values[$valueIndex] = str_replace( "-3B", ";", $values[$valueIndex] );
$beforePrepareValue = $values[$valueIndex];
$description = null;
$comparator = SMW_CMP_EQ;
$this->prepareValue( $values[$valueIndex], $comparator );
// generating the DVs:
if ( ( $values[$valueIndex] === '' ) || ( $values[$valueIndex] == '?' ) ) { // explicit omission
$valueIndex++;
return $description;
}
$dataValue = DataValueFactory::getInstance()->newDataValueByProperty(
$diProperty,
$values[$valueIndex],
false,
$this->dataValue->getContextPage()
);
if ( $dataValue->isValid() ) { // valid DV: keep
$description = new SomeProperty(
$diProperty,
$dataValue->getQueryDescription( $beforePrepareValue )
);
$valueIndex++;
} elseif ( ( count( $values ) - $valueIndex ) == ( count( $this->dataValue->getProperties() ) - $propertyIndex ) ) {
$this->addError( $dataValue->getErrors() );
++$valueIndex;
}
return $description;
}
}
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