Integrate Payment Gateway Skrill (Moneybookers) to BoxBilling

Skrill

<?php
/*
 */
class Payment_Adapter_Skrill
{
    private $config = array();
    
    public function __construct($config)
    {
        $this->config = $config;
        
        if(!function_exists('curl_exec')) {
            throw new Exception('PHP Curl extension must be enabled in order to use Skrill gateway');
        }
        
        if(!$this->config['email']) {
            throw new Exception('Payment gateway "Skrill" is not configured properly. Please update configuration parameter "Skrill Email address" at "Configuration -> Payments".');
        }
    }

    public static function getConfig()
    {
        return array(
            'supports_one_time_payments'   =>  true,
            'supports_subscriptions'     =>  true,
            'description'     =>  'Enter your Skrill email to start accepting payments by Skrill.',
            'form'  => array(
                'email' => array('text', array(
                            'label' => 'Skrill email address for payments',
                            'validators'=>array('EmailAddress'),
                    ),
                 ),
            ),
        );
    }

    public function getHtml($api_admin, $invoice_id, $subscription)
    {
        $invoice = $api_admin->invoice_get(array('id'=>$invoice_id));
        $buyer = $invoice['buyer'];

        if($subscription) {
            $subs = $invoice['subscription'];
            $data = array();

            // Merchant Details
            $data['pay_to_email']       = $this->config['email'];
            $data['return_url']         = $this->config['return_url'];
            $data['cancel_url']         = $this->config['cancel_url'];
            $data['status_url']         = $this->config['notify_url'];
            $data['language']           = 'EN';

            // Customer Details
            $data['pay_from_email']  	= $buyer['email'];
            $data['firstname']			= $buyer['first_name'];
            $data['lastname']			= $buyer['last_name'];
            $data['address']			= $buyer['address'];
            $data['phone_number']		= $buyer['phone'];
            $data['postal_code']		= $buyer['zip'];
            $data['city']				= $buyer['city'];
            $data['state']			    = $buyer['state'];
            $data['country']			= $buyer['country'];

            // Payment Details
            $data['currency']           = $invoice['currency'];
            $data['detail1_description']= 'detail1_description';
            $data['detail1_text']       = 'detail1_text';

            // Recurring Billing
            $data['rec_status_url'] 	= $this->config['notify_url'].'&rec_payment=cancelled';
            $data['rec_amount'] 		= $invoice['total'];
            $data['rec_period'] 		= $subs['cycle'];
            if($subs['unit']=='M') {
                $data['rec_cycle'] = 'month';
            } elseif($subs['unit']=='Y') {
                $data['rec_cycle'] = 'year';
            } elseif($subs['unit']=='W') {
                $data['rec_cycle'] = 'day';
                $data['rec_period'] = 7*$subs['cycle'];
            }
        } else {
            $data = array();

            // Merchant Details
            $data['pay_to_email']       = $this->config['email'];
            $data['return_url']         = $this->config['return_url'];
            $data['cancel_url']         = $this->config['cancel_url'];
            $data['status_url']         = $this->config['notify_url'];
            $data['language']           = 'EN';

            // Payment Details
            $data['amount']             = $invoice['total'];
            $data['currency']           = $invoice['currency'];
            $data['detail1_description']= 'detail1_description';
            $data['detail1_text']       = 'detail1_text';
        }
        
        if($this->config['test_mode']) {
            $url = ''; // todo: testing account?
        } else {
            $url = 'https://www.moneybookers.com/app/payment.pl';
        }
        
        return $this->_generateForm($url, $data);
    }

    public function processTransaction($api_admin, $id, $data, $gateway_id)
    {
        if(APPLICATION_ENV != 'testing' && !$this->_isIpnValid($data)) {
            throw new Exception('IPN is not valid');
        }
        
        $ipn = $data['post'];

        $invoice = $api_admin->invoice_get(array('id'=>$data['get']['bb_invoice_id']));
        $client_id = $invoice['client']['id'];


        // Determine BB txn_type
        // have: payment, refund, subscription_create, subscription_cancel, unknown
        if ($data['get']['rec_payment']=='cancelled')
        {
            $txn_type = 'subscription_cancel';
        } else {
            $txn_type = 'payment';
        }

        // Determine BB txn_status
        switch ($ipn['status']){
            case '2': // MB processed
                $txn_status='complete';
                break;

            case '0': // MB pending
                $txn_status='pending';
                break;

            case '-2': // MB failed
            case '-1': // MB cancelled
            case '-3': // MB chargeback
            default:
                $txn_status='unknown';
                break;
        }


       // Update Transaction
        $tx_data = array(
            'id'            =>  $id,
            'invoice_id'    =>  $data['get']['bb_invoice_id'],
            'txn_status'    =>  $txn_status,
            'txn_id'        =>  $ipn['mb_transaction_id'],
            'amount'        =>  $ipn['mb_amount'],
            'currency'      =>  $ipn['mb_currency'],
            'type'          =>  $txn_type,
            'status'        =>  $txn_status,
            'updated_at'    =>  date('c'),
        );
        $api_admin->invoice_transaction_update($tx_data);


        switch ($txn_type) {

            case 'payment':
                // Update Client Balance
                if ($txn_status='complete') {
                    $bd = array(
                        'id'            =>  $client_id,
                        'amount'        =>  $ipn['mb_amount'],
                        'description'   =>  'Skrill transaction '.$ipn['mb_transaction_id'],
                        'type'          =>  'Skrill',
                        'rel_id'        =>  $ipn['mb_transaction_id'],
                    );
                    $api_admin->client_balance_add_funds($bd);
                    $api_admin->invoice_batch_pay_with_credits(array('client_id'=>$client_id));
                }

                // todo: implement creating recurring billing here.
                // rec_payment_type=='recurring'
                // BB sid = MB rec_payment_id

                break;

            case 'subscription_cancel':
                // todo: find out subscription_id from MB? rec_payment_id?
                // reserved code
                //$s = $api_admin->invoice_subscription_get(array('sid'=>$ipn['subscr_id']));
                //$api_admin->invoice_subscription_update(array('id'=>$s['id'], 'status'=>'canceled'));
                break;

        }
    }

    // todo: need validation. use $data['post']['md5sig']. read MBs_gateway_manual pdf, page 18, point IV.
    private function _isIpnValid($data)
    {
        return true;
    }
    
    private function _generateForm($url, $data, $method = 'post')
    {
        $form  = '';
        $form .= '<form name="payment_form" action="'.$url.'" method="'.$method.'">' . PHP_EOL;
        foreach($data as $key => $value) {
            $form .= sprintf('<input type="hidden" name="%s" value="%s" />', $key, $value) . PHP_EOL;
        }
        $form .=  '<input class="bb-button bb-button-submit" type="submit" value="Pay with Skrill" id="payment_button"/>'. PHP_EOL;
        $form .=  '</form>' . PHP_EOL . PHP_EOL;

        if(isset($this->config['auto_redirect']) && $this->config['auto_redirect']) {
            $form .= sprintf('<h2>%s</h2>', __('Redirecting to Skrill.com'));
            $form .= "<script type='text/javascript'>$(document).ready(function(){    document.getElementById('payment_button').style.display = 'none';    document.forms['payment_form'].submit();});</script>";
        }

        return $form;
    }
}

Can it possible for Skrill to do the payment automatic without clicking on Skrill's pay button?

same question as above, 2021 no answer :(