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181 lines (144 loc) · 4.39 KB
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<?php
declare(strict_types=1);
namespace MsgPhp\Domain;
/**
* @author Roland Franssen <franssen.roland@gmail.com>
*/
final class DomainCollection implements DomainCollectionInterface
{
private $elements;
/**
* @return $this|self
*/
public static function fromValue(?iterable $value): DomainCollectionInterface
{
return new self($value ?? []);
}
public function __construct(iterable $elements)
{
$this->elements = $elements;
}
public function getIterator(): \Traversable
{
if ($this->elements instanceof \Traversable) {
return (function () {
foreach ($this->elements as $key => $element) {
yield $key => $element;
}
})();
}
return new \ArrayIterator($this->elements);
}
public function isEmpty(): bool
{
if ($this->elements instanceof \Traversable) {
foreach ($this->elements as $element) {
return false;
}
return true;
}
return !$this->elements;
}
public function contains($element): bool
{
if ($this->elements instanceof \Traversable) {
foreach ($this->elements as $key => $knownElement) {
if ($element === $knownElement) {
return true;
}
}
return false;
}
return in_array($element, $this->elements, true);
}
public function containsKey($key): bool
{
if ($this->elements instanceof \Traversable) {
foreach ($this->elements as $knownKey => $element) {
if ((string) $key === (string) $knownKey) {
return true;
}
}
return false;
}
return isset($this->elements[$key]) || array_key_exists($key, $this->elements);
}
public function first()
{
if ($this->elements instanceof \Traversable) {
foreach ($this->elements as $element) {
return $element;
}
return false;
}
return reset($this->elements);
}
public function last()
{
if ($this->elements instanceof \Traversable) {
$element = false;
foreach ($this->elements as $key => $element) {
}
return $element;
}
return end($this->elements);
}
public function get($key)
{
if ($this->elements instanceof \Traversable) {
foreach ($this->elements as $knownKey => $element) {
if ((string) $key === (string) $knownKey) {
return $element;
}
}
return null;
}
return $this->elements[$key] ?? null;
}
public function filter(callable $filter): DomainCollectionInterface
{
if ($this->elements instanceof \Traversable) {
$elements = [];
foreach ($this->elements as $key => $element) {
if ($filter($element)) {
$elements[$key] = $element;
}
}
return new self($elements);
}
return new self(array_filter($this->elements, $filter));
}
public function slice(int $offset, int $limit = 0): DomainCollectionInterface
{
if ($this->elements instanceof \Traversable) {
$elements = [];
$i = -1;
foreach ($this->elements as $key => $element) {
if (++$i < $offset) {
continue;
}
if ($limit && $i >= ($offset + $limit)) {
break;
}
$elements[$key] = $element;
}
return new self($elements);
}
return new self(array_slice($this->elements, $offset, $limit ?: null, true));
}
public function map(callable $mapper): array
{
if ($this->elements instanceof \Traversable) {
$elements = [];
foreach ($this->elements as $key => $element) {
$elements[$key] = $mapper($element);
}
return $elements;
}
return array_map($mapper, $this->elements);
}
public function count(): int
{
return $this->elements instanceof \Traversable ? iterator_count($this->elements) : count($this->elements);
}
}