Paypal.php

<?php
/**
 * File Paypal.php.
 *
 * @author Marcio Camello <marciocamello@outlook.com>
 * @see https://github.com/paypal/rest-api-sdk-php/blob/master/sample/
 * @see https://developer.paypal.com/webapps/developer/applications/accounts
 */

namespace marciocamello;

define('PP_CONFIG_PATH', __DIR__);

use Yii;
use yii\base\ErrorException;
use yii\helpers\ArrayHelper;
use yii\base\Component;

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

class Paypal extends Component
{
    //region Mode (production/development)
    const MODE_SANDBOX = 'sandbox';
    const MODE_LIVE    = 'live';
    //endregion

    //region Log levels
    /*
     * Logging level can be one of FINE, INFO, WARN or ERROR.
     * Logging is most verbose in the 'FINE' level and decreases as you proceed towards ERROR.
     */
    const LOG_LEVEL_FINE  = 'FINE';
    const LOG_LEVEL_INFO  = 'INFO';
    const LOG_LEVEL_WARN  = 'WARN';
    const LOG_LEVEL_ERROR = 'ERROR';
    //endregion

    //region API settings
    public $clientId;
    public $clientSecret;
    public $isProduction = false;
    public $currency = 'USD';
    public $config = [];

    /** @var ApiContext */
    private $_apiContext = null;

    /**
     * @setConfig 
     * _apiContext in init() method
     */
    public function init()
    {
        $this->setConfig();
    }

    /**
     * @inheritdoc
     */
    private function setConfig()
    {
        // ### 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

        $this->_apiContext = new ApiContext(
            new OAuthTokenCredential(
                $this->clientId,
                $this->clientSecret
            )
        );

        // #### SDK configuration

        // Comment this line out and uncomment the PP_CONFIG_PATH
        // 'define' block if you want to use static file
        // based configuration
        $this->_apiContext->setConfig(ArrayHelper::merge(
            [
                'mode'                      => self::MODE_SANDBOX, // development (sandbox) or production (live) mode
                'http.ConnectionTimeOut'    => 30,
                'http.Retry'                => 1,
                'log.LogEnabled'            => YII_DEBUG ? 1 : 0,
                'log.FileName'              => Yii::getAlias('@runtime/logs/paypal.log'),
                'log.LogLevel'              => self::LOG_LEVEL_FINE,
                'validation.level'          => 'log',
                'cache.enabled'             => 'true'
            ],$this->config)
        );

        // Set file name of the log if present
        if (isset($this->config['log.FileName'])
            && isset($this->config['log.LogEnabled'])
            && ((bool)$this->config['log.LogEnabled'] == true)
        ) {
            $logFileName = \Yii::getAlias($this->config['log.FileName']);

            if ($logFileName) {
                if (!file_exists($logFileName)) {
                    if (!touch($logFileName)) {
                        throw new ErrorException('Can\'t create paypal.log file at: ' . $logFileName);
                    }
                }
            }

            $this->config['log.FileName'] = $logFileName;
        }

        return $this->_apiContext;
    }

    //Demo
    public function payDemo()
    {
        $addr = new Address();
        $addr->setLine1('52 N Main ST');
        $addr->setCity('Johnstown');
        $addr->setCountryCode('US');
        $addr->setPostalCode('43210');
        $addr->setState('OH');

        $card = new CreditCard();
        $card->setNumber('4417119669820331');
        $card->setType('visa');
        $card->setExpireMonth('11');
        $card->setExpireYear('2018');
        $card->setCvv2('874');
        $card->setFirstName('Joe');
        $card->setLastName('Shopper');
        $card->setBillingAddress($addr);

        $fi = new FundingInstrument();
        $fi->setCreditCard($card);

        $payer = new Payer();
        $payer->setPaymentMethod('credit_card');
        $payer->setFundingInstruments(array($fi));

        $amountDetails = new Details();
        $amountDetails->setSubtotal('15.99');
        $amountDetails->setTax('0.03');
        $amountDetails->setShipping('0.03');

        $amount = new Amount();
        $amount->setCurrency('USD');
        $amount->setTotal('7.47');
        $amount->setDetails($amountDetails);

        $transaction = new Transaction();
        $transaction->setAmount($amount);
        $transaction->setDescription('This is the payment transaction description.');

        $payment = new Payment();
        $payment->setIntent('sale');
        $payment->setPayer($payer);
        $payment->setTransactions(array($transaction));

        return $payment->create($this->_apiContext);
    }
}