How to integrate PayPal REST PHP SDK into phalcon autoloader?!

Hey

You just must inserting paypal library into composer

"require": {
        "phalcon/incubator": "dev-master",
        "swiftmailer/swiftmailer": "@stable",
        "kzykhys/ciconia": "~1.0.0",
        "paypal/rest-api-sdk-php" : "*",
        "fabfuel/prophiler": "~1.0"
    }

Then use it

<?php
namespace ZPhalcon\Tools;

use Phalcon\Mvc\User\Component;

if (!file_exists(ROOT_DIR . 'vendor/autoload.php')) {
    echo "The 'vendor' folder is missing. You must run 'composer update' to resolve application dependencies.\nPlease see the README for more information.\n";
    exit(1);
}
require_once ROOT_DIR . 'vendor/autoload.php';

use PayPal\Api\Address;
use PayPal\Api\CreditCard;
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Rest\ApiContext;
use PayPal\Auth\OAuthTokenCredential;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\Transaction;
use PayPal\Api\RedirectUrls;
use PayPal\Api\FundingInstrument;
use PayPal\Api\Item;
use PayPal\Api\ItemList;

class Paypal extends Component
{

    /**
    * ### getBaseUrl function
    * // utility function that returns base url for
    * // determining return/cancel urls
    * @return string
    */
    public function getBaseUrl()
    {
        $protocol = 'http';
        if ($_SERVER['SERVER_PORT'] == 443 || (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on')) {
            $protocol .= 's';
            $protocol_port = $_SERVER['SERVER_PORT'];
        } else {
            $protocol_port = 80;
        }
        $host = $_SERVER['HTTP_HOST'];
        $port = $_SERVER['SERVER_PORT'];
        $request = $_SERVER['PHP_SELF'];
        return dirname($protocol . '://' . $host . ($port == $protocol_port ? '' : ':' . $port) . $request);
    }

    public function makePaymentUsingPayPal($id, $total, $paymentDesc = null)
    {

        $currency = $this->config->payment->currency;
        $tax      = $this->config->payment->tax;
        $shipping = $this->config->payment->shipping;
        $cancelUrl = $this->config->payment->paypal->cancelUrl;
        $returnUrl = $this->config->payment->paypal->returnUrl;
        $itemQuantity = 1;
        $itemName = "Post jobs on Phalconjobs.com";

        $payer = new Payer();
        $payer->setPaymentMethod("paypal");

        $item = new Item();
        $item->setQuantity($itemQuantity);
        $item->setName($itemName);
        $item->setPrice($total);
        $item->setCurrency($currency);

        $itemList = new ItemList();
        $itemList->setItems(array($item));

        // Specify the payment amount.
        $amount = new Amount();
        $amount->setCurrency($currency)
               ->setTotal($total + $shipping + $tax);

        //Transaction
        $transaction = new Transaction();
        $transaction->setDescription($paymentDesc)
                    ->setAmount($amount)
                    ->setItemList($itemList);

        // Create the payment and redirect buyer to paypal for payment approval.
        $redirectUrls = new RedirectUrls();
        $redirectUrls->setReturnUrl($this->getBaseUrl() . $returnUrl .'&id='. $id . '&success=true');
        $redirectUrls->setCancelUrl($this->getBaseUrl() . $cancelUrl . '&success=false');

        $payment = new Payment();
        $payment->setRedirectUrls($redirectUrls);
        $payment->setIntent("authorize");
        $payment->setPayer($payer);
        $payment->setTransactions(array($transaction));
        try {
            $payment->create($this->getApiContext());
        } catch (PayPal\Exception\PPConnectionException $ex) {
            echo "Exception: " . $ex->getMessage() . PHP_EOL;
            var_dump($ex->getData());
            exit(1);
        }

        /**
         * Get redirect url
         * The API response provides the url that you must redirect
         * the buyer to. Retrieve the url from the $payment->getLinks() method
         *
         */
        foreach ($payment->getLinks() as $key => $link) {
            if ($link->getRel() == 'approval_url') {
                $redirectUrl = $link->getHref();
                break;
            }
        }
        if (isset($redirectUrl)) {
            return $this->response->redirect($redirectUrl);
            exit;
        }
    }
    /**
     * Helper method for getting an APIContext for all calls
     *
     * @return PayPal\Rest\ApiContext
     */
    public function getApiContext()
    {

        // ### Api context
        // Use an ApiContext object to authenticate
        // API calls. The clientId and clientSecret for the
        // OAuthTokenCredential class can be retrieved from
        // developer.paypal.com

        $apiContext = new ApiContext(
            new OAuthTokenCredential(
                $this->config->payment->paypal->clientId,
                $this->config->payment->paypal->secret
            )
        );
        // #### SDK configuration

        // Comment this line out and uncomment the PP_CONFIG_PATH
        // 'define' block if you want to use static file
        // based configuration
        $apiContext->setConfig(
            array(
                'mode' => $this->config->payment->paypal->env,
                'http.ConnectionTimeOut' => $this->config->payment->paypal->timeout,
                'log.LogEnabled' => $this->config->payment->paypal->log,
                'log.FileName' => $this->config->payment->paypal->fileName,
                'log.LogLevel' => $this->config->payment->paypal->logLevel
            )
        );
        return $apiContext;
    }
}
//