exchange-2.0/app/Classes/Modules/Billplzs/DataTransferObjects/BillplzXSignatureObject.php

<?php

namespace App\Classes\Modules\Billplzs\DataTransferObjects;

use Illuminate\Http\Request;
use App\Classes\General\Interfaces\DataTransferObject;

class BillplzXSignatureObject implements DataTransferObject
{

    /** @var string */
    private $billPlzId;

    /** @var array */
    private $billPlzConstructArray;

    /** @var string */
    private $billPlzConstructString;

    /** @var string  */
    private $billPlzComputedXSignature;

    /** @var Request  */
    private $request;

    /** @var string  */
    private $requestXSignature;

    public function __construct(Request $request)
    {
        $this->request = $request;

        $this->billPlzId = $request->id ? $request->id : $request->{'billplz[id]'};

        $this->requestXSignature = $request->x_signature ? $request->x_signature : $request->{'billplz[x_signature]'};

        $this->_constructBillplzArray()->_natSortBillplzArray()->_constructBillplzString()->_computeBillplzXSignature();
    }

    private function _constructBillplzArray(){
        foreach($this->request->all() as $key => $value){
            if($key != 'x_signature' && $key != 'billplz[x_signature]'){
                $key = str_replace(']', '', str_replace('[', '', $key));
                $this->billPlzConstructArray[] = $key.$value;
            }
        }
        return $this;
    }

    private function _natCaseSortBillplzArray(){
        natcasesort($this->billPlzConstructArray);
        return $this;
    }

    private function _natSortBillplzArray(){
        natsort($this->billPlzConstructArray);
        return $this;
    }

    private function _constructBillplzString(){
        $this->billPlzConstructString = implode('|', $this->billPlzConstructArray);
        return $this;
    }

    private function _computeBillplzXSignature(){
        $this->billPlzComputedXSignature = hash_hmac('sha256', $this->billPlzConstructString, config('billplz.x_signature_key'));
        return $this;
    }

    public function getBillPlzId(): string
    {
        return $this->billPlzId;
    }

    /**
     * @return array
     */
    public function getBillPlzConstructArray(): array
    {
        return $this->billPlzConstructArray;
    }

    /**
     * @return string
     */
    public function getBillPlzConstructString(): string
    {
        return $this->billPlzConstructString;
    }

    /**
     * @return string
     */
    public function getBillPlzComputedXSignature(): string
    {
        return $this->billPlzComputedXSignature;
    }

    public function isValidSignature(): bool
    {
        return $this->billPlzComputedXSignature == $this->requestXSignature ? true : false;
    }

}