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<?php |
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namespace Wikibase\DataModel\Snak; |
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use Hashable; |
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use InvalidArgumentException; |
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use Traversable; |
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use Wikibase\DataModel\HashArray; |
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use Wikibase\DataModel\Internal\MapValueHasher; |
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/** |
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* List of Snak objects. |
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* Indexes the snaks by hash and ensures no more the one snak with the same hash are in the list. |
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* |
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* @since 0.1 |
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* |
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* @license GPL-2.0+ |
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* @author Jeroen De Dauw < [email protected] > |
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* @author Addshore |
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*/ |
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class SnakList extends HashArray implements Hashable { |
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/** |
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* @param Snak[]|Traversable $snaks |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function __construct( $snaks = [] ) { |
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if ( !is_array( $snaks ) && !( $snaks instanceof Traversable ) ) { |
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throw new InvalidArgumentException( '$snaks must be an array or an instance of Traversable' ); |
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} |
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foreach ( $snaks as $index => $snak ) { |
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$this->setElement( $index, $snak ); |
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} |
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} |
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/** |
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* @see GenericArrayObject::getObjectType |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getObjectType() { |
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return 'Wikibase\DataModel\Snak\Snak'; |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param string $snakHash |
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* |
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* @return boolean |
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*/ |
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public function hasSnakHash( $snakHash ) { |
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return $this->hasElementHash( $snakHash ); |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param string $snakHash |
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*/ |
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public function removeSnakHash( $snakHash ) { |
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$this->removeByElementHash( $snakHash ); |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param Snak $snak |
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* |
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* @return boolean Indicates if the snak was added or not. |
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*/ |
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public function addSnak( Snak $snak ) { |
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return $this->addElement( $snak ); |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param Snak $snak |
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* |
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* @return boolean |
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*/ |
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public function hasSnak( Snak $snak ) { |
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return $this->hasElementHash( $snak->getHash() ); |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param Snak $snak |
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*/ |
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public function removeSnak( Snak $snak ) { |
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$this->removeByElementHash( $snak->getHash() ); |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param string $snakHash |
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* |
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* @return Snak|bool |
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*/ |
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public function getSnak( $snakHash ) { |
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return $this->getByElementHash( $snakHash ); |
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} |
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/** |
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* @see HashArray::getHash |
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* |
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* The hash is purely value based. Order of the elements in the array is not held into account. |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getHash() { |
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$hasher = new MapValueHasher(); |
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return $hasher->hash( $this ); |
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} |
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/** |
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* Orders the snaks in the list grouping them by property. |
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* |
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* @param string[] $order List of serliazed property ids to order by. |
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* |
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* @since 0.5 |
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*/ |
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public function orderByProperty( array $order = [] ) { |
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$snaksByProperty = $this->getSnaksByProperty(); |
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$orderedProperties = array_unique( array_merge( $order, array_keys( $snaksByProperty ) ) ); |
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foreach ( $orderedProperties as $property ) { |
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if ( array_key_exists( $property, $snaksByProperty ) ) { |
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$snaks = $snaksByProperty[$property]; |
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$this->moveSnaksToBottom( $snaks ); |
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} |
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} |
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} |
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/** |
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* @param Snak[] $snaks to remove and re add |
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*/ |
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private function moveSnaksToBottom( array $snaks ) { |
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foreach ( $snaks as $snak ) { |
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$this->removeSnak( $snak ); |
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$this->addSnak( $snak ); |
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} |
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} |
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/** |
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* Gets the snaks in the current object in an array |
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* grouped by property id |
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* |
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* @return array[] |
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*/ |
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private function getSnaksByProperty() { |
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$snaksByProperty = []; |
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foreach ( $this as $snak ) { |
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/** @var Snak $snak */ |
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$propertyId = $snak->getPropertyId()->getSerialization(); |
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if ( !isset( $snaksByProperty[$propertyId] ) ) { |
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$snaksByProperty[$propertyId] = []; |
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} |
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$snaksByProperty[$propertyId][] = $snak; |
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} |
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return $snaksByProperty; |
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} |
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} |
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wmde /
WikibaseDataModel
