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<?php
/*!
* Hybridauth
* https://hybridauth.github.io | https://github.com/hybridauth/hybridauth
*  (c) 2017 Hybridauth authors | https://hybridauth.github.io/license.html
*/

namespace HybridauthProvider;

use HybridauthAdapterOAuth2;
use HybridauthExceptionUnexpectedApiResponseException;
use HybridauthData;
use HybridauthUser;

/**
 * Paypal OAuth2 provider adapter.
 *
 * Example:
 *
 *   $config = [
 *       'callback' => HybridauthHttpClientUtil::getCurrentUrl(),
 *       'keys'     => [ 'id' => '', 'secret' => '' ],
 *       'scope'    => 'openid profile email',
 *   ];
 *
 *   $adapter = new HybridauthProviderPaypal( $config );
 *
 *   try {
 *       $adapter->authenticate();
 *
 *       $userProfile = $adapter->getUserProfile();
 *       $tokens = $adapter->getAccessToken();
 *       $profile = $adapter->getUserProfile();
 *   }
 *   catch( Exception $e ){
 *       echo $e->getMessage() ;
 *   }
 */
class Paypal extends OAuth2
{
    /**
    * {@inheritdoc}
    */
    public $scope = 'openid profile email address';

    /**
    * {@inheritdoc}
    */
    protected $apiBaseUrl = 'https://api.paypal.com/';

    /**
    * {@inheritdoc}
    */
    protected $authorizeUrl = 'https://www.paypal.com/signin/authorize';

    /**
    * {@inheritdoc}
    */
    protected $accessTokenUrl = 'https://api.paypal.com/v1/oauth2/token';

    /**
    * {@inheritdoc}
    */
    protected $apiDocumentation = 'https://developer.paypal.com/docs/api/overview/#';

    /**
    * {@inheritdoc}
    */
    protected function initialize()
    {
        parent::initialize();

        $this->AuthorizeUrlParameters += [
            'flowEntry' => 'static'
        ];

        $this->tokenExchangeHeaders = [
            'Authorization' => 'Basic ' . base64_encode($this->clientId .  ':' . $this->clientSecret)
        ];

        $this->tokenRefreshHeaders = [
            'Authorization' => 'Basic ' . base64_encode($this->clientId .  ':' . $this->clientSecret)
        ];
    }

    /**
    * {@inheritdoc}
    *
    * See: https://developer.paypal.com/docs/api/identity/v1/
    * See: https://developer.paypal.com/docs/connect-with-paypal/integrate/
    */
    public function getUserProfile()
    {
        $headers = [
            'Content-Type' => 'application/json',
        ];

        $parameters = [
            'schema' => 'paypalv1.1'
        ];

        $response = $this->apiRequest('v1/identity/oauth2/userinfo', 'GET', $parameters, $headers);
        $data = new DataCollection($response);

        if (! $data->exists('user_id')) {
            throw new UnexpectedApiResponseException('Provider API returned an unexpected response.');
        }

        $userProfile = new UserProfile();
        $userProfile->identifier  = $data->get('user_id');
        $userProfile->firstName   = $data->get('given_name');
        $userProfile->lastName    = $data->get('family_name');
        $userProfile->displayName = $data->get('name');
        $userProfile->address     = $data->filter('address')->get('street_address');
        $userProfile->city        = $data->filter('address')->get('locality');
        $userProfile->country     = $data->filter('address')->get('country');
        $userProfile->region      = $data->filter('address')->get('region');
        $userProfile->zip         = $data->filter('address')->get('postal_code');

        $emails = $data->filter('emails')->toArray();
        foreach ($emails as $email) {
            $email = new DataCollection($email);
            if ($email->get('confirmed')) {
                $userProfile->emailVerified = $email->get('value');
            }

            if ($email->get('primary')) {
                $userProfile->email = $email->get('value');
            }
        }

        return $userProfile;
    }
}