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<?php
namespace SMW\Deserializers\DVDescriptionDeserializer;
use InvalidArgumentException;
use SMW\DIWikiPage;
use SMWDataValue as DataValue;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.3
*
* @author mwjames
*/
class SomeValueDescriptionDeserializer extends DescriptionDeserializer {
/**
* @since 2.3
*
* {@inheritDoc}
*/
public function isDeserializerFor( $serialization ) {
return $serialization instanceof DataValue;
}
/**
* @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' );
}
// https://www.w3.org/TR/html4/charset.html
// Internally encode something like [[Help:>Foo*]] since < and >
// would throw off the Title validator; apply only in combination with
// a NS such as [[Help:>...]]
$value = str_replace( [ ':<', ':>' ], [ ':-3C', ':-3E' ], $value );
$comparator = SMW_CMP_EQ;
$this->prepareValue( $value, $comparator );
$this->dataValue->setOption(
DataValue::OPT_QUERY_COMP_CONTEXT,
( $comparator !== SMW_CMP_EQ && $comparator !== SMW_CMP_NEQ )
);
$this->dataValue->setUserValue( $value );
if ( !$this->dataValue->isValid() ) {
return $this->descriptionFactory->newThingDescription();
}
$dataItem = $this->dataValue->getDataItem();
$description = $this->descriptionFactory->newValueDescription(
$dataItem,
$this->dataValue->getProperty(),
$comparator
);
// Ensure [[>Help:Foo]] === [[Help:>Foo]] / [[Help:~Foo*]] === [[~Help:Foo*]]
if ( $dataItem instanceof DIWikiPage && $dataItem->getNamespace() !== NS_MAIN ) {
$description = $this->findApproriateDescription( $comparator, $dataItem, $description );
}
return $description;
}
private function findApproriateDescription( $comparator, $dataItem, $description ) {
$value = $dataItem->getDBKey();
// Normalize a possible earlier encoded string part in order for the
// QueryComparator::extractComparatorFromString to work its magic
if ( $comparator === SMW_CMP_EQ || $comparator === SMW_CMP_NEQ ) {
$value = str_replace( [ '-3C', '-3E' ], [ '<', '>' ], $value );
$this->prepareValue( $value, $comparator );
}
// No approximate, use the normal ValueDescription
if ( $comparator === SMW_CMP_EQ || $comparator === SMW_CMP_NEQ ) {
return $description;
}
// The NS has been stripped, use a normal value clause in the MAIN namespace
$valueDescription = $this->descriptionFactory->newValueDescription(
$this->dataItemFactory->newDIWikiPage( $value, NS_MAIN ),
null,
$comparator
);
// #1652
// Use [[Help:~Foo*]] as conjunctive description since the comparator
// is only applied on the sortkey that contains the DBKey part
$description = $this->descriptionFactory->newConjunction( [
$this->descriptionFactory->newNamespaceDescription( $dataItem->getNamespace() ),
$valueDescription
] );
return $description;
}
}
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