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./othercms/ips_4.3.4/applications/nexus/interface/gateways/paypal.php
<?php
/**
 * @brief        PayPal Gateway
 * @author        <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
 * @copyright    (c) Invision Power Services, Inc.
 * @license        https://www.invisioncommunity.com/legal/standards/
 * @package        Invision Community
 * @subpackage    Nexus
 * @since        07 Mar 2014
 */

define('REPORT_EXCEPTIONS', TRUE);
require_once
'../../../../init.php';
\
IPS\Session\Front::i();

/* Load Transaction */
try
{
   
$transaction = \IPS\nexus\Transaction::load( \IPS\Request::i()->nexusTransactionId );
   
    if (
$transaction->status !== \IPS\nexus\Transaction::STATUS_PENDING )
    {
        throw new \
OutofRangeException;
    }
}
catch ( \
OutOfRangeException $e )
{
    \
IPS\Output::i()->redirect( \IPS\Http\Url::internal( "app=nexus&module=checkout&controller=checkout&do=transaction&id=&t=" . \IPS\Request::i()->nexusTransactionId, 'front', 'nexus_checkout' ) );
}

/* Process */
try
{    
   
/* Check fraud rules */
   
$maxMind = NULL;
    if ( \
IPS\Settings::i()->maxmind_key and ( !\IPS\Settings::i()->maxmind_gateways or \IPS\Settings::i()->maxmind_gateways == '*' or in_array( $transaction->method->id, explode( ',', \IPS\Settings::i()->maxmind_gateways ) ) ) )
    {
       
$maxMind = new \IPS\nexus\Fraud\MaxMind\Request;
       
$maxMind->setTransaction( $transaction );
       
$maxMind->setTransactionType( 'paypal' );
    }
   
$fraudResult = $transaction->runFraudCheck( $maxMind );
    if (
$fraudResult === \IPS\nexus\Transaction::STATUS_REFUSED )
    {
       
$transaction->executeFraudAction( $fraudResult, FALSE );
       
$transaction->sendNotification();
        \
IPS\Output::i()->redirect( $transaction->url() );
    }
   
   
/* Billing Agreement */
   
if ( isset( \IPS\Request::i()->billingAgreement ) )
    {
       
/* Execute */
       
$response = $transaction->method->api( "payments/billing-agreements/" . \IPS\Request::i()->token . "/agreement-execute" );
       
$agreementId = $response['id'];
        if ( isset(
$response['payer'] ) and isset( $response['payer']['status'] ) )
        {
           
$extra = $transaction->extra;
           
$extra['verified'] = $response['payer']['status'];
           
$transaction->extra = $extra;
        }
               
       
/* Create Billing Agreement */
       
$billingAgreement = new \IPS\nexus\Gateway\PayPal\BillingAgreement;
       
$billingAgreement->gw_id = $agreementId;
       
$billingAgreement->method = $transaction->method;
       
$billingAgreement->member = $transaction->member;
       
$billingAgreement->started = \IPS\DateTime::create();
       
$billingAgreement->next_cycle = \IPS\DateTime::create()->add( new \DateInterval( 'P' . $response['plan']['payment_definitions'][0]['frequency_interval'] . mb_substr( $response['plan']['payment_definitions'][0]['frequency'], 0, 1 ) ) );
       
$billingAgreement->save();
       
$transaction->billing_agreement = $billingAgreement;
       
$transaction->save();
       
       
/* Get the initial setup transaction if possible */
       
$haveInitialTransaction = FALSE;
       
$transactions = $transaction->method->api( "payments/billing-agreements/{$agreementId}/transactions?start_date=" . date( 'Y-m-d', time() - 86400 ) . '&end_date=' . date( 'Y-m-d' ), NULL, 'get' );
        foreach (
$transactions['agreement_transaction_list'] as $t )
        {
            if (
$t['status'] == 'Completed' )
            {
               
$transaction->gw_id = $t['transaction_id'];
               
$transaction->save();

                if (
$fraudResult and $fraudResult !== \IPS\nexus\Transaction::STATUS_PAID )
                {
                   
$transaction->executeFraudAction( $fraudResult, TRUE );
                }
                else
                {
                   
$transaction->member->log( 'transaction', array(
                       
'type'            => 'paid',
                       
'status'        => $transaction::STATUS_PAID,
                       
'id'            => $transaction->id,
                       
'invoice_id'    => $transaction->invoice->id,
                       
'invoice_title'    => $transaction->invoice->title,
                    ) );
                   
                   
$memberJustCreated = $transaction->approve();
                    if (
$memberJustCreated )
                    {
                        \
IPS\Session::i()->setMember( $memberJustCreated );
                        \
IPS\Member\Device::loadOrCreate( $memberJustCreated, FALSE )->updateAfterAuthentication( NULL );
                    }
                }
               
               
$transaction->sendNotification();
                \
IPS\Output::i()->redirect( $transaction->url() );
            }
        }
       
       
/* If it hasn't been processed yet (PayPal is a bit flakey), we need to try again in a few minutes */
       
$transaction->status = \IPS\nexus\Transaction::STATUS_GATEWAY_PENDING;
       
$transaction->save();
       
$transaction->sendNotification();
        \
IPS\Db::i()->update( 'core_tasks', array( 'enabled' => 1 ), "`key`='gatewayPending'" );
        \
IPS\Output::i()->redirect( $transaction->url() );
    }
   
   
/* Normal */
   
else
    {
       
$response = $transaction->method->api( "payments/payment/{$transaction->gw_id}/execute", array(
           
'payer_id'    => \IPS\Request::i()->PayerID,
        ) );
       
$transaction->gw_id = $response['transactions'][0]['related_resources'][0]['authorization']['id']; // Was previously a payment ID. This sets it to the actual transaction ID for the authorization. At capture, it will be updated again to the capture transaction ID
       
$transaction->auth = \IPS\DateTime::ts( strtotime( $response['transactions'][0]['related_resources'][0]['authorization']['valid_until'] ) );
        if ( isset(
$response['payer'] ) and isset( $response['payer']['status'] ) )
        {
           
$extra = $transaction->extra;
           
$extra['verified'] = $response['payer']['status'];
           
$transaction->extra = $extra;
        }
       
$transaction->save();
    }
   
   
/* Capture */
   
if ( $fraudResult )
    {
       
$transaction->executeFraudAction( $fraudResult, TRUE );
    }
    if ( !
$fraudResult or $fraudResult === \IPS\nexus\Transaction::STATUS_PAID )
    {
       
$memberJustCreated = $transaction->captureAndApprove();
        if (
$memberJustCreated )
        {
            \
IPS\Session::i()->setMember( $memberJustCreated );
            \
IPS\Member\Device::loadOrCreate( $memberJustCreated, FALSE )->updateAfterAuthentication( NULL );
        }
    }
   
$transaction->sendNotification();
   
   
/* Redirect */
   
\IPS\Output::i()->redirect( $transaction->url() );
}
catch ( \
Exception $e )
{
    \
IPS\Log::log( $e, 'paypal' );
    \
IPS\Output::i()->redirect( $transaction->invoice->checkoutUrl()->setQueryString( array( '_step' => 'checkout_pay', 'err' => $e->getMessage() ) ) );
}