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<?php
/*
 * @copyright Copyright (c) 2024 AltumCode (https://altumcode.com/)
 *
 * This software is exclusively sold through https://altumcode.com/ by the AltumCode author.
 * Downloading this product from any other sources and running it without a proper license is illegal,
 *  except the official ones linked from https://altumcode.com/.
 */

namespace Altum\PaymentGateways;

/* Helper class for PayPal v2 */
class Paypal {
    static public $sandbox_api_url = 'https://api-m.sandbox.paypal.com/';
    static public $live_api_url = 'https://api-m.paypal.com/';
    static public $access_token = null;

public static function get_api_url() {
        return settings()->paypal->mode == 'live' ? self::$live_api_url : self::$sandbox_api_url;
    }

public static function get_access_token() {
        if(self::$access_token) return self::$access_token;

/* Generate PayPal access token */
        \Unirest\Request::auth(settings()->paypal->client_id, settings()->paypal->secret);

$response = \Unirest\Request::post(self::get_api_url() . 'v1/oauth2/token', [], \Unirest\Request\Body::form(['grant_type' => 'client_credentials']));

/* Check against errors */
        if($response->code >= 400) {
            throw new \Exception($response->body->error . ':' . $response->body->error_description);
        }

return self::$access_token = $response->body->access_token;
    }

public static function get_headers() {
        return [
            'Content-Type' => 'application/json',
            'Authorization' => 'Bearer ' . self::get_access_token()
        ];
    }

}