<?php

namespace Matrix\Data\Room;

class PreviousRoom implements \JsonSerializable
{
  public function __construct(
    private string $roomId,
    private ?string $eventId = null,
  )
  {}

  public function jsonSerialize(): array
  {
    return array_filter([
      "event_id" => $this->eventId,
      "room_id" => $this->roomId,
    ], fn ($value) => ! is_null($value));
  }
}