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<?php |
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namespace WikibaseQuality\ConstraintReport\ConstraintCheck; |
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use DomainException; |
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use InvalidArgumentException; |
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use Wikibase\DataModel\Entity\EntityIdValue; |
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use Wikibase\DataModel\Entity\ItemId; |
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use Wikibase\DataModel\Snak\PropertyNoValueSnak; |
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use Wikibase\DataModel\Snak\PropertySomeValueSnak; |
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use Wikibase\DataModel\Snak\PropertyValueSnak; |
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use Wikibase\DataModel\Snak\Snak; |
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/** |
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* A value that can either be an item ID, some value (unknown value), or no value. |
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* |
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* @author Lucas Werkmeister |
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* @license GPL-2.0-or-later |
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*/ |
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class ItemIdSnakValue { |
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/** |
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* @var ItemId|null |
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*/ |
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private $itemId = null; |
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/** |
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* @var bool |
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*/ |
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private $some = false; |
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/** |
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* @var bool |
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*/ |
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private $no = false; |
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private function __construct() { |
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} |
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/** |
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* Get an {@link ItemIdSnakValue} from the given $itemId. |
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* |
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* @param ItemId $itemId |
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* @return self |
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*/ |
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public static function fromItemId( ItemId $itemId ) { |
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$ret = new self; |
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$ret->itemId = $itemId; |
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return $ret; |
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} |
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/** |
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* Get an {@link ItemIdSnakValue} that wraps an unknown value. |
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* |
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* @return self |
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*/ |
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public static function someValue() { |
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$ret = new self; |
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$ret->some = true; |
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return $ret; |
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} |
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/** |
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* Get an {@link ItemIdSnakValue} that wraps no value. |
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* |
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* @return self |
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*/ |
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public static function noValue() { |
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$ret = new self; |
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$ret->no = true; |
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return $ret; |
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} |
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/** |
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* Get an {@link ItemIdSnakValue} that matches the given snak. |
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* |
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* @param Snak $snak |
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* |
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* @throws InvalidArgumentException |
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* @return self |
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*/ |
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public static function fromSnak( Snak $snak ) { |
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switch ( true ) { |
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case $snak instanceof PropertyValueSnak: |
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$dataValue = $snak->getDataValue(); |
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if ( $dataValue instanceof EntityIdValue ) { |
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$itemId = $dataValue->getEntityId(); |
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if ( $itemId instanceof ItemId ) { |
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return self::fromItemId( $itemId ); |
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} |
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} |
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break; |
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case $snak instanceof PropertySomeValueSnak: |
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return self::someValue(); |
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case $snak instanceof PropertyNoValueSnak: |
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return self::noValue(); |
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} |
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throw new InvalidArgumentException( 'Snak must contain item ID value or be a somevalue / novalue snak' ); |
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} |
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/** |
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* Check whether this {@link ItemIdSnakValue} contains a known value or not. |
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* |
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* @return bool |
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*/ |
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public function isValue() { |
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return $this->itemId !== null; |
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} |
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/** |
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* Check whether this {@link ItemIdSnakValue} contains an unknown value or not. |
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* |
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* @return bool |
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*/ |
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public function isSomeValue() { |
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return $this->some; |
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} |
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/** |
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* Check whether this {@link ItemIdSnakValue} contains no value or not. |
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* |
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* @return bool |
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*/ |
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public function isNoValue() { |
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return $this->no; |
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} |
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/** |
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* Get the item ID contained in this {@link ItemIdSnakValue}. |
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* Only valid if {@link isValue} is true. |
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* |
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* @throws DomainException if this value does not contain an item ID |
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* @return ItemId |
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*/ |
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public function getItemId() { |
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if ( !$this->isValue() ) { |
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throw new DomainException( 'This value does not contain an item ID.' ); |
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} |
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return $this->itemId; |
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} |
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/** |
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* Check whether this value matches the given $snak |
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* (same kind and, if contains known value, same value). |
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* |
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* @param Snak $snak |
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* @return bool |
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*/ |
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public function matchesSnak( Snak $snak ) { |
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switch ( true ) { |
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case $snak instanceof PropertyValueSnak: |
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$dataValue = $snak->getDataValue(); |
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return $this->isValue() && |
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$dataValue instanceof EntityIdValue && |
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$dataValue->getEntityId() instanceof ItemId && |
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$dataValue->getEntityId()->equals( $this->getItemId() ); |
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case $snak instanceof PropertySomeValueSnak: |
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return $this->isSomeValue(); |
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case $snak instanceof PropertyNoValueSnak: |
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return $this->isNoValue(); |
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} |
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} |
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} |
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wikimedia /
mediawiki-extensions-WikibaseQualityConstraints
