54 lines
1.1 KiB
PHP
54 lines
1.1 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace Shared\Pagination;
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use Shared\DDD\Equatable;
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/**
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* Value object representing a page number in pagination (1-indexed).
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*/
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final readonly class PageNumber implements \JsonSerializable, \Stringable, Equatable
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{
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public const int DEFAULT_PAGE = 1;
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public function __construct(
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public int $value = self::DEFAULT_PAGE,
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) {
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if ($this->value <= 0) {
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throw new \InvalidArgumentException('Page number must be greater than 0');
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}
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}
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public static function of(int $value): self
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{
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return new self($value);
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}
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public static function default(): self
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{
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return new self(self::DEFAULT_PAGE);
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}
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public function value(): int
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{
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return $this->value;
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}
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public function equals(mixed $other): bool
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{
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return $other instanceof self && $this->value === $other->value;
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}
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public function __toString(): string
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{
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return (string) $this->value;
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}
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public function jsonSerialize(): int
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{
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return $this->value;
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}
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}
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