shipping-portal/app/Transformers/ScheduleTransformer.php

<?php

namespace App\Transformers;

use App\Models\Schedule;
use Carbon\Carbon;
use League\Fractal\TransformerAbstract;

class ScheduleTransformer extends TransformerAbstract
{
    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = [
        //
    ];

    /**
     * List of resources possible to include
     *
     * @var array
     */
    protected $availableIncludes = [
        //
    ];

    /**
     * A Fractal transformer.
     *
     * @param Schedule $schedule
     * @return array
     */
    public function transform(Schedule $schedule): array
    {
        return [
            'id' => $schedule->id,
            'etd' => $schedule->etd ? $schedule->etd->format('d-m-Y') : 'n/a',
            'eta' => $schedule->eta ? $schedule->eta->format('d-m-Y') : 'n/a',
            'billing_days_left' => [
                'value' => (Carbon::parse($schedule->eta)->subDays(7)->gt(Carbon::now())) ? '+' : '-',
                'duration' => Carbon::parse($schedule->eta)->subDays(7)->diffInDays(Carbon::now()),
            ],
            'status' => $schedule->status,
        ];
    }
}