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<?php |
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declare(strict_types=1); |
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namespace Stratadox\EntityState; |
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use Stratadox\ImmutableCollection\ImmutableCollection; |
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/** |
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* Collection of entity representations. |
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* |
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* @author Stratadox |
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*/ |
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final class EntityStates extends ImmutableCollection implements ListsEntityStates |
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{ |
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private function __construct(RepresentsEntity ...$entities) |
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{ |
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parent::__construct(...$entities); |
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} |
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/** |
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* Packs a number of entities in a collection. |
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* |
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* @param RepresentsEntity ...$entities The entities to collect. |
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* @return ListsEntityStates The collection of entities. |
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*/ |
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public static function list(RepresentsEntity ...$entities): ListsEntityStates |
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{ |
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return new EntityStates(...$entities); |
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} |
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/** @inheritdoc */ |
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public function current(): RepresentsEntity |
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{ |
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return parent::current(); |
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} |
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/** @inheritdoc */ |
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public function offsetGet($position): RepresentsEntity |
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{ |
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return parent::offsetGet($position); |
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} |
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/** @inheritdoc */ |
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public function add(RepresentsEntity $entityState): ListsEntityStates |
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{ |
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if ($this->hasThe($entityState)) { |
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return $this->mergeThe($entityState); |
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} |
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$entityStates = $this->items(); |
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$entityStates[] = $entityState; |
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return EntityStates::list(...$entityStates); |
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} |
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/** @inheritdoc */ |
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public function hasThe(RepresentsEntity $entity): bool |
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{ |
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foreach ($this as $candidate) { |
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if ($candidate->hasTheSameIdentityAs($entity)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** @inheritdoc */ |
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public function hasADifferent(RepresentsEntity $entity): bool |
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{ |
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foreach ($this as $candidate) { |
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if ($candidate->hasTheSameIdentityAs($entity)) { |
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return $candidate->isDifferentFrom($entity); |
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} |
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} |
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return false; |
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} |
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/** @inheritdoc */ |
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public function entitiesThatAreNotIn(ListsEntityStates $otherEntities): ListsEntityStates |
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{ |
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$entities = []; |
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foreach ($this as $entity) { |
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if (!$otherEntities->hasThe($entity)) { |
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$entities[] = $entity; |
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} |
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} |
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return EntityStates::list(...$entities); |
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} |
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/** @inheritdoc */ |
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public function entityStateThatDiffersFrom( |
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ListsEntityStates $otherState |
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): ListsEntityStates { |
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$entities = []; |
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foreach ($this as $state) { |
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if ($otherState->hasADifferent($state)) { |
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$entities[] = $state->subsetThatDiffersFrom($otherState); |
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} |
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} |
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return EntityStates::list(...$entities); |
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} |
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/** @inheritdoc */ |
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public function changesSince(ListsEntityStates $previousState): TellsWhatChanged |
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{ |
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return Changes::wereMade( |
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$this->entitiesThatAreNotIn($previousState), |
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$this->entityStateThatDiffersFrom($previousState), |
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$previousState->entitiesThatAreNotIn($this) |
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); |
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} |
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private function mergeThe(RepresentsEntity $newState): ListsEntityStates |
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{ |
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$entities = $this->items(); |
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foreach ($this as $i => $entityState) { |
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if ($entityState->hasTheSameIdentityAs($newState)) { |
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$entities[$i] = $entityState->mergeWith($newState); |
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} |
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} |
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return EntityStates::list(...$entities); |
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} |
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} |
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Stratadox /
EntityState
