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<?php
namespace SMW\Elastic\QueryEngine\DescriptionInterpreters;
use SMW\DIWikiPage;
use SMW\Elastic\QueryEngine\ConditionBuilder;
use SMW\Query\Language\ValueDescription;
use SMWDIBlob as DIBlob;
use SMWDIBoolean as DIBoolean;
use SMWDInumber as DINumber;
use SMWDITime as DITime;
use SMW\Utils\CharExaminer;
/**
* @license GNU GPL v2+
* @since 3.0
*
* @author mwjames
*/
class ValueDescriptionInterpreter {
/**
* @var ConditionBuilder
*/
private $conditionBuilder;
/**
* @var FieldMapper
*/
private $fieldMapper;
/**
* @since 3.0
*
* @param ConditionBuilder $conditionBuilder
*/
public function __construct( ConditionBuilder $conditionBuilder ) {
$this->conditionBuilder = $conditionBuilder;
}
/**
* @since 3.0
*
* @param ValueDescription $description
*
* @return Condition
*/
public function interpretDescription( ValueDescription $description, $isConjunction = false ) {
$dataItem = $description->getDataItem();
$comparator = $description->getComparator();
$property = $description->getProperty();
$this->fieldMapper = $this->conditionBuilder->getFieldMapper();
$params = [];
$pid = false;
$filter = false;
if ( $property === null ) {
$field = "subject.sortkey";
} else {
$pid = 'P:' . $this->conditionBuilder->getID( $property );
if ( $property->isInverse() ) {
// Want to know if this case happens and if so we need to handle
// it somewhow ...
throw new RuntimeException( "ValueDescription with an inverted property! PID: $pid, " . $description->getQueryString() );
} else {
$field = $this->fieldMapper->getField( $property, 'Field' );
}
$field = "$pid.$field";
}
//$description->getHierarchyDepth(); ??
$hierarchyDepth = null;
$hierarchy = $this->conditionBuilder->findHierarchyMembers(
$property,
$hierarchyDepth
);
if ( $dataItem instanceof DIWikiPage && $comparator === SMW_CMP_EQ && $property === null ) {
// We want an exact match!
$field = '_id';
$value = $this->conditionBuilder->getID( $dataItem );
} elseif ( $dataItem instanceof DIWikiPage && $comparator === SMW_CMP_NEQ && $property === null ) {
// We want an exact match!
$field = '_id';
$value = $this->conditionBuilder->getID( $dataItem );
} elseif ( $dataItem instanceof DIWikiPage && $comparator === SMW_CMP_EQ ) {
$field = "$pid.wpgID";
$value = $this->conditionBuilder->getID( $dataItem );
} elseif ( $dataItem instanceof DIWikiPage && $comparator === SMW_CMP_NEQ ) {
$field = "$pid.wpgID";
$value = $this->conditionBuilder->getID( $dataItem );
} elseif ( $dataItem instanceof DIWikiPage ) {
$value = $dataItem->getSortKey();
} elseif ( $dataItem instanceof DITime ) {
$field = "$field.keyword";
$value = $dataItem->getJD();
} elseif ( $dataItem instanceof DIBoolean ) {
$value = $dataItem->getBoolean();
} elseif ( $dataItem instanceof DINumber ) {
$value = $dataItem->getNumber();
} else {
$value = $dataItem->getSerialization();
}
if ( $dataItem instanceof DIWikiPage && $this->isRange( $comparator ) ) {
$params = $this->fieldMapper->range( "$field.keyword", $value, $comparator );
} elseif ( $dataItem instanceof DIBlob && $comparator === SMW_CMP_EQ ) {
$params = $this->fieldMapper->match( "$field", "\"$value\"" );
} elseif ( $comparator === SMW_CMP_EQ || $comparator === SMW_CMP_NEQ ) {
$params = $this->fieldMapper->terms( "$field", $value );
} elseif ( $comparator === SMW_CMP_LIKE || $comparator === SMW_CMP_NLKE ) {
$params = $this->proximity_bool( $field, $value );
} elseif ( $this->isRange( $comparator ) ) {
$params = $this->fieldMapper->range( $field, $value, $comparator );
} else {
$params = $this->fieldMapper->match( $field, $value );
}
if ( $params !== [] && $pid ) {
$params = $this->fieldMapper->hierarchy( $params, $pid, $hierarchy );
}
$condition = $this->conditionBuilder->newCondition( $params );
if ( $this->isNot( $comparator ) && $isConjunction ) {
$condition->type( 'must_not' );
}
if ( !$isConjunction ) {
$condition->type( ( $this->isNot( $comparator ) ? 'must_not' : ( $filter ? 'filter' : 'must' ) ) );
}
$condition->log( [ 'ValueDescription' => $description->getQueryString() ] );
return $condition;
}
private function isRange( $comparator ) {
return $comparator === SMW_CMP_GRTR || $comparator === SMW_CMP_GEQ || $comparator === SMW_CMP_LESS || $comparator === SMW_CMP_LEQ;
}
private function isNot( $comparator ) {
return $comparator === SMW_CMP_NLKE || $comparator === SMW_CMP_NEQ;
}
private function proximity_bool( $field, $value ) {
$params = [];
$hasWildcard = strpos( $value, '*' ) !== false;
// Q1203
// [[phrase:fox jump*]] (aka ~"fox jump*") + wildcard; use match with
// a `multi_match` and type `phrase_prefix`
$isPhrase = strpos( $value, '"' ) !== false;
$isWide = false;
// Wide proximity uses ~~ as identifier as in [[~~ ... ]] or
// [[in:fox jumps]]
if ( $value{0} === '~' ) {
$isWide = true;
// Remove the ~ to avoid a `QueryShardException[Failed to parse query ...`
$value = substr( $value, 1 );
if ( !$hasWildcard && $this->conditionBuilder->getOption( 'wide.proximity.as.match_phrase', true ) ) {
$value = trim( $value, '"' );
$value = "\"$value\"";
}
$field = $this->conditionBuilder->getOption( 'wide.proximity.fields', [ 'text_copy' ] );
}
// Wide or simple proximity? + wildcard?
// https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#operator-min
if ( $hasWildcard && $isWide && !$isPhrase ) {
// cjk.best.effort.proximity.match
if ( $this->isCJK( $value ) ) {
// Increase match accuracy by relying on a `phrase` to define char
// boundaries
$params = $this->fieldMapper->match( $field, "\"$value\"" );
} else {
$params = $this->fieldMapper->query_string( $field, $value, [ 'minimum_should_match' => 1 ] );
}
} elseif ( $hasWildcard && !$isWide && !$isPhrase ) {
// [[~Foo/Bar/*]] (simple proximity) is only used on subject.sortkey
// which is why we want to use a `not_analyzed` field to exactly
// match the content before the *.
// `lowercase` uses a normalizer to achieve case insensitivity
if ( $this->conditionBuilder->getOption( 'page.field.case.insensitive.proximity.match', true ) ) {
$field = "$field.lowercase";
} else {
$field = "$field.keyword";
}
$params = $this->fieldMapper->wildcard( $field, $value );
$filter = true;
} else {
$params = $this->fieldMapper->match( $field, $value );
}
return $params;
}
/**
* Fields that use a standard analyzer will split CJK terms into single chars
* and any enclosing like *...* makes a term not applicable to the same
* treatment which prevents a split and hereby causing the search match to be
* worse off hence remove `*` in case of CJK usage.
*/
private function isCJK( &$text ) {
// Only use the examiner on the standard index_def since ICU provides
// better CJK and may handle `*` more sufficiently
if ( !$this->conditionBuilder->getOption( 'cjk.best.effort.proximity.match', false ) ) {
return false;
}
if ( !CharExaminer::isCJK( $text ) ) {
return false;
}
if ( $text{0} === '*' ) {
$text = mb_substr( $text, 1 );
}
if ( mb_substr( $text , -1 ) === '*' ) {
$text = mb_substr( $text, 0, -1 );
}
return true;
}
}
|
