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<?php |
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namespace WikibaseQuality\ConstraintReport\ConstraintCheck\Context; |
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use LogicException; |
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use Wikibase\DataModel\Entity\EntityDocument; |
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use Wikibase\DataModel\Entity\PropertyId; |
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use Wikibase\DataModel\Snak\Snak; |
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use Wikibase\DataModel\Snak\SnakList; |
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use Wikibase\DataModel\Statement\Statement; |
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use Wikibase\DataModel\Statement\StatementList; |
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use Wikibase\DataModel\Statement\StatementListProvider; |
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use Wikimedia\Assert\Assert; |
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/** |
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* A constraint check context for the main snak of a statement. |
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* |
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* @license GPL-2.0-or-later |
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*/ |
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class MainSnakContext extends AbstractContext { |
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/** |
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* @var Statement |
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*/ |
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private $statement; |
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public function __construct( EntityDocument $entity, Statement $statement ) { |
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Assert::parameterType( StatementListProvider::class, $entity, '$entity' ); |
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parent::__construct( $entity, $statement->getMainSnak() ); |
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$this->statement = $statement; |
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} |
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public function getType() { |
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return self::TYPE_STATEMENT; |
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} |
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public function getSnakRank() { |
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return $this->statement->getRank(); |
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} |
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public function getSnakStatement() { |
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return $this->statement; |
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} |
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public function getSnakGroup( $groupingMode, array $separators = [] ) { |
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/** @var StatementList $statements */ |
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$statements = $this->entity->getStatements(); |
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switch ( $groupingMode ) { |
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case Context::GROUP_NON_DEPRECATED: |
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$statements = $statements->getByRank( [ |
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Statement::RANK_NORMAL, |
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Statement::RANK_PREFERRED, |
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] ); |
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break; |
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case Context::GROUP_BEST_RANK: |
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$statements = $this->getBestStatementsPerPropertyId( $statements ); |
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break; |
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default: |
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throw new LogicException( 'Unknown $groupingMode ' . $groupingMode ); |
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} |
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return $this->getStatementsWithSameQualifiersForProperties( |
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$this->statement, |
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$statements, |
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$separators |
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)->getMainSnaks(); |
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} |
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private function getBestStatementsPerPropertyId( StatementList $statements ) { |
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$allBestStatements = new StatementList(); |
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foreach ( $statements->getPropertyIds() as $propertyId ) { |
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$bestStatements = $statements->getByPropertyId( $propertyId ) |
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->getBestStatements(); |
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foreach ( $bestStatements as $bestStatement ) { |
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$allBestStatements->addStatement( $bestStatement ); |
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} |
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} |
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return $allBestStatements; |
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} |
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/** |
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* Returns the statements of a statement list |
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* which for a set of propert IDs have the same qualifiers as a certain statement. |
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* “unknown value” qualifiers are considered different from each other. |
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* |
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* @param Statement $currentStatement |
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* @param StatementList $allStatements |
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* @param PropertyId[] $qualifierPropertyIds |
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* @return StatementList |
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*/ |
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private function getStatementsWithSameQualifiersForProperties( |
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Statement $currentStatement, |
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StatementList $allStatements, |
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array $qualifierPropertyIds |
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) { |
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$similarStatements = new StatementList(); |
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foreach ( $allStatements as $statement ) { |
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if ( $statement === $currentStatement ) { |
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// if the statement has an “unknown value” qualifier, |
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// it might be considered different from itself, |
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// so add it explicitly to ensure it’s always included |
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$similarStatements->addStatement( $statement ); |
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continue; |
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} |
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foreach ( $qualifierPropertyIds as $qualifierPropertyId ) { |
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if ( !$this->haveSameQualifiers( $currentStatement, $statement, $qualifierPropertyId ) ) { |
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continue 2; |
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} |
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} |
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$similarStatements->addStatement( $statement ); |
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} |
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return $similarStatements; |
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} |
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/** |
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* Tests whether two statements have the same qualifiers with a certain property ID. |
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* “unknown value” qualifiers are considered different from each other. |
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* |
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* @param Statement $s1 |
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* @param Statement $s2 |
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* @param PropertyId $propertyId |
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* @return bool |
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*/ |
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private function haveSameQualifiers( Statement $s1, Statement $s2, PropertyId $propertyId ) { |
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$q1 = $this->getSnaksWithPropertyId( $s1->getQualifiers(), $propertyId ); |
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$q2 = $this->getSnaksWithPropertyId( $s2->getQualifiers(), $propertyId ); |
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if ( $q1->count() !== $q2->count() ) { |
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return false; |
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} |
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foreach ( $q1 as $qualifier ) { |
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switch ( $qualifier->getType() ) { |
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case 'value': |
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case 'novalue': |
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if ( !$q2->hasSnak( $qualifier ) ) { |
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return false; |
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} |
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break; |
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case 'somevalue': |
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return false; // all “unknown value”s are considered different from each other |
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} |
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} |
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// a SnakList cannot contain the same snak more than once, |
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// so if every snak of q1 is also in q2 and their cardinality is identical, |
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// then they must be entirely identical |
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return true; |
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} |
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/** |
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* Returns the snaks of the given snak list with the specified property ID. |
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* |
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* @param SnakList $allSnaks |
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* @param PropertyId $propertyId |
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* @return SnakList |
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*/ |
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private function getSnaksWithPropertyId( SnakList $allSnaks, PropertyId $propertyId ) { |
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$snaks = new SnakList(); |
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/** @var Snak $snak */ |
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foreach ( $allSnaks as $snak ) { |
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if ( $snak->getPropertyId()->equals( $propertyId ) ) { |
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$snaks->addSnak( $snak ); |
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} |
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} |
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return $snaks; |
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} |
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public function getCursor() { |
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return new MainSnakContextCursor( |
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$this->entity->getId()->getSerialization(), |
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$this->statement->getPropertyId()->getSerialization(), |
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$this->statement->getGuid(), |
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$this->statement->getMainSnak()->getHash() |
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); |
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} |
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} |
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wikimedia /
mediawiki-extensions-WikibaseQualityConstraints
