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为 sunnysideup/ecommerce 提供了一个基本的 afterpay 支付方式实现，以 https://github.com/culturekings/afterpay 为基础。

安装

使用 composer

composer require sunnysideup/afterpay

设置

按照以下说明添加以下代码

1. 设置凭证

app/_config/afterpay.yml:

---
Name: Afterpay
---

Sunnysideup\Afterpay\Factory\SilverstripeMerchantApi:
  merchant_name: 'my merchant name'
  merchant_id: yyy
  secret_key: 'xxx'
  expectations_folder: 'app/afterpay/configurations'
  number_of_payments: 4

1. 将 afterpay 设置为支付选项

app/_config/ecommerce.yml:

EcommercePayment:
  supported_methods:
    # ...
    Sunnysideup\Afterpay\Model\AfterpayEcommercePayment: "Afterpay"

1. 向 EcomConfig 添加字段（通过数据扩展或其他方式）

    private static $db = [
        'ShowAfterpayOption' => 'Boolean',
        'AfterpayMinValue' => 'Int',
        'AfterpayMaxValue' => 'Int',
    ]

1. 向产品添加功能

app/src/Model/MyProduct.php:

use Sunnysideup\Afterpay\Factory\SilverstripeMerchantApi;

class MyProduct extends Product
{
    public function ShowAfterpay() : bool
    {
        return return $this->myAfterpayApi()->canProcessPayment($this->CalculatedPrice());
    }

    protected function myAfterpayApi() : SilverstripeMerchantApi
    {
        return SilverstripeMerchantApi::inst()
            ->setMinAndMaxPrice(
                (float) EcommerceConfig::inst()->AfterpayMinValue,
                (float) EcommerceConfig::inst()->AfterpayMaxValue
            )
            ->setIsServerAvailable(EcommerceConfig::inst()->ShowAfterpayOption);
    }

    public function getAfterpayNumberOfPayments() : int
    {
        return $this->myAfterpayApi()
            ->getNumberOfPayments();
    }

    public function getAfterpayNumberOfPaymentsInWeeks() : int
    {
        return $this->getAfterpayNumberOfPayments() * 2;
    }

    public function getAfterpayAmountPerPayment() :float
    {
        return $this->myAfterpayApi()
            ->getAmountPerPayment($this->CalculatedPrice());
    }

    public function getAfterpayAmountPerPaymentAsMoney() : Money
    {
        return EcommerceCurrency::get_money_object_from_order_currency(
            $this->getAfterpayAmountPerPayment()
        );
    }

    public function getAfterpayAmountPerPaymentAsCurrency(): Currency
    {
        return DBField::create_field('Currency', $this->getAfterpayAmountPerPayment());
    }


}