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<?php declare(strict_types=1); |
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namespace Stratadox\EntityState; |
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use Stratadox\IdentityMap\MapsObjectsByIdentity; |
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final class StateRepresentation implements State |
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{ |
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private $entityStates; |
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private $map; |
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public function __construct( |
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ListsEntityStates $entities, |
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MapsObjectsByIdentity $map |
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) { |
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$this->entityStates = $entities; |
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$this->map = $map; |
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} |
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public static function with( |
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ListsEntityStates $entities, |
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MapsObjectsByIdentity $map |
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): State { |
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return new self($entities, $map); |
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} |
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public function entityStates(): ListsEntityStates |
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{ |
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return $this->entityStates; |
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} |
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public function identityMap(): MapsObjectsByIdentity |
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{ |
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return $this->map; |
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} |
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public function add(State $additional): State |
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{ |
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$entityStates = $this->entityStates; |
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$map = $this->map; |
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foreach ($additional->entityStates() as $entityState) { |
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$entityStates = $entityStates->add($entityState); |
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$map = $this->addToMapIfNew( |
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$map, |
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$additional->identityMap(), |
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$entityState->class(), |
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$entityState->id() |
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); |
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} |
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return new self($entityStates, $map); |
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} |
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public function changesSince(State $previous): TellsWhatChanged |
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{ |
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return $this->entityStates->changesSince($previous->entityStates()); |
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} |
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public function offsetExists($offset): bool |
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{ |
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return $this->entityStates->offsetExists($offset); |
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} |
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public function offsetGet($offset): RepresentsEntity |
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{ |
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return $this->entityStates->offsetGet($offset); |
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} |
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public function offsetSet($offset, $value): void |
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{ |
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$this->entityStates->offsetSet($offset, $value); |
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} |
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public function offsetUnset($offset): void |
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{ |
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$this->entityStates->offsetUnset($offset); |
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} |
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public function next(): void |
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{ |
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$this->entityStates->next(); |
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} |
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public function key(): int |
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{ |
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return $this->entityStates->key(); |
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} |
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public function valid(): bool |
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{ |
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return $this->entityStates->valid(); |
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} |
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public function rewind(): void |
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{ |
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$this->entityStates->rewind(); |
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} |
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public function current(): RepresentsEntity |
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{ |
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return $this->entityStates->current(); |
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} |
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public function count(): int |
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{ |
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return $this->entityStates->count(); |
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} |
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private function addToMapIfNew( |
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MapsObjectsByIdentity $map, |
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MapsObjectsByIdentity $additionalMap, |
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string $class, |
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string $id |
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): MapsObjectsByIdentity { |
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if ($map->has($class, $id)) { |
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return $map; |
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} |
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return $map->add( |
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$id, |
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$additionalMap->get($class, $id) |
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); |
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} |
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} |
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