portal/app/Classes/Modules/Transactions/ControllersLogic/ShippingEstimationCalculatorLogic.php

<?php

namespace App\Classes\Modules\Transactions\ControllersLogic;

use App\Classes\General\Abstracts\AbstractControllerLogic;
use App\Classes\Modules\SegmentConstants\Services\FetchesSegmentConstant;
use App\Classes\ValueObjects\Constants\SegmentConstants;

use App\Models\District;
use Carbon\Carbon;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use App\Classes\General\Helper;

class ShippingEstimationCalculatorLogic extends AbstractControllerLogic
{

    /** @var FetchesSegmentConstant */
    private $fetchesSegmentConstant;

    /**
     * @return array
     */
    protected function notification():array {
        return [
            'title' => 'Shipping estimation',
            'message' => 'You have successfully calculate the Shipping Estimation'
        ];
    }

    public function __construct(
        FetchesSegmentConstant $fetchesSegmentConstant
    ){
        $this->fetchesSegmentConstant = $fetchesSegmentConstant;
    }

    public function logic(Request $request) : JsonResponse
    {
        $base_price =  $warehouse_rate =  $state_rate = 0;
        $state_select = '';

        $width = $request->input('width') / 100;    // metre
        $length = $request->input('length') / 100;  // metre
        $height = $request->input('height') / 100;  // metre

        $cbm = (float) ($width * $length * $height);

        $base_price_constant = $this->fetchesSegmentConstant->execute(['segment_id' => 1, 'reference' => SegmentConstants::BASE_PRICE]);
        $warehouse_rate_constant = $this->fetchesSegmentConstant->execute(['segment_id' => 1, 'reference' => SegmentConstants::WAREHOUSE_RATE]);
        $state_rate_constant = $this->fetchesSegmentConstant->execute(['segment_id' => 1, 'reference' => SegmentConstants::STATE_RATE]);
        $outstation_postcode_constant = $this->fetchesSegmentConstant->execute(['segment_id' => 1, 'reference' => SegmentConstants::OUTSTATION_POSTCODE]);

        $base_price = Helper::getConstantByKey($base_price_constant, date('Y-m-d'));
        $selected_warehouse_rate = Helper::getConstantByKey($warehouse_rate_constant, $request->input('warehouse_id'));
        $warehouse_rate = is_object($selected_warehouse_rate) ? $selected_warehouse_rate->amount : 0;

        $district = District::where('postcode','LIKE','%'.$request->input('postcode').'%')->first();
        $state_rate_constant = Helper::getConstantByKey($state_rate_constant, $district->state_id);

        Helper::checkPostcodeExistInConstant($outstation_postcode_constant, $request->input('postcode')) === true ? $state_select = 'outstation' : '' ;
        $state_rate_constant = (array)$state_rate_constant;
        $state_rate = $state_select == '' ? 0 : $state_rate_constant[$state_select];

        $price_cbm = $base_price + $warehouse_rate + $state_rate;
        $total_price_cbm = $price_cbm * $cbm;

        return $this->response([
            'cbm' => $cbm,  'base_price' => $base_price, 'warehouse_rate' => $warehouse_rate,
            'state_rate' => $state_rate, 'total_price_cbm' => $total_price_cbm
        ]);
    }

}