<?php
/**
 * Booking primary-key value object.
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Domain\Booking;

use Bookline\Domain\Shared\DomainException;

/**
 * Typed wrapper around a positive booking row id.
 *
 * @since 0.1.0
 */
final class BookingId {

	/**
	 * Backing field.
	 *
	 * @var int
	 */
	private int $value;

	/**
	 * Constructor.
	 *
	 * @param int $value Positive database id.
	 *
	 * @throws DomainException When the id is not positive.
	 */
	public function __construct( int $value ) {
		if ( $value < 1 ) {
			throw new DomainException( 'booking_id.invalid', 'Booking id must be a positive integer.' );
		}
		$this->value = $value;
	}

	/**
	 * To int.
	 *
	 * @since 0.1.0
	 */
	public function to_int(): int {
		return $this->value;
	}

	/**
	 * Equals.
	 *
	 * @param self $other Parameter.
	 * @since 0.1.0
	 */
	public function equals( self $other ): bool {
		return $this->value === $other->value;
	}

	/**
	 * String cast.
	 *
	 * @since 0.1.0
	 */
	public function __toString(): string {
		return (string) $this->value;
	}
}