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<? namespace Bitrix\UI\EntitySelector; class ItemCollection implements \IteratorAggregate, \JsonSerializable { private $items = []; private $itemsByEntity = []; public function __construct() { } public function add(Item $item): bool { if ($this->has($item)) { return false; } if (!isset($this->itemsByEntity[$item->getEntityId()])) { $this->itemsByEntity[$item->getEntityId()] = []; } $this->itemsByEntity[$item->getEntityId()][$item->getId()] = $item; $this->items[] = $item; return true; } public function get(string $entityId, $itemId): ?Item { return $this->itemsByEntity[$entityId][$itemId] ?? null; } public function has(Item $item): bool { return isset($this->itemsByEntity[$item->getEntityId()][$item->getId()]); } public function getAll(): array { return $this->items; } public function count(): int { return count($this->items); } public function getEntityItems(string $entityId): array { return $this->itemsByEntity[$entityId] ?? []; } public function toJsObject(): string { $items = $this->toArray(); return \CUtil::phpToJSObject($items, false, false, true); } public function toArray(): array { return array_map(function(Item $item) { return $item->toArray(); }, $this->getAll()); } public function jsonSerialize() { return $this->items; } public function getIterator(): \ArrayIterator { return new \ArrayIterator($this->items); } }