portal/app/Classes/Modules/Schedules/DataTransferObjects/ScheduleObject.php

<?php

namespace App\Classes\Modules\Schedules\DataTransferObjects;

use App\Classes\General\Interfaces\DataTransferObject;
use Carbon\Carbon;

class ScheduleObject implements DataTransferObject
{

    /** @var Carbonn date */
    private $etd;

    /** @var Carbon date */
    private $eta;

    /** @var int */
    private $transport_id;

    /**
     * ScheduleObject constructor
     * @param int $etd
     * @param int $eta
     * @param int $transport_id
     */
    public function __construct(string $etd, string $eta, int $transport_id)
    {
        $this->etd = $etd;
        $this->eta = $eta;
        $this->transport_id = $transport_id;
    }

    /**
     * @return string
     */
    public function getETD(): Carbon
    {
        return $this->completed_date ? Carbon::parse($this->etd);
    }

    /**
     * @return string
     */
    public function getETA(): Carbon
    {
        return $this->completed_date ? Carbon::parse($this->eta);
    }

    /**
     * @return int
     */
    public function getTransportId(): int
    {
        return $this->transport_id;
    }

}