医疗保险订单系统支付与保单生成模块：打通支付渠道 - 保单电子化 - 凭证推送流程

// 支付服务接口定义
public interface IPaymentService
{
    Task ProcessPaymentAsync(PaymentRequest request);
    Task CheckPaymentStatusAsync(string transactionId);
}

// 支付网关统一适配器
public class PaymentGatewayAdapter : IPaymentService
{
    private readonly IPaymentGateway _gateway;
    
    public PaymentGatewayAdapter(IPaymentGateway gateway)
    {
        _gateway = gateway;
    }
    
    public async Task ProcessPaymentAsync(PaymentRequest request)
    {
        // 支付参数验证
        ValidatePaymentRequest(request);
        
        // 调用具体支付渠道
        var result = await _gateway.ProcessPaymentAsync(request);
        
        // 记录支付交易
        await RecordTransactionAsync(request, result);
        
        return result;
    }
    
    // 其他实现方法...
}

// 电子保单生成服务
class PolicyGenerator {
  constructor() {
    this.templateCache = new Map();
  }
  
  // 生成电子保单
  async generatePolicy(policyData, templateName) {
    // 获取保单模板
    const template = await this.getTemplate(templateName);
    
    // 填充模板数据
    const filledTemplate = this.fillTemplate(template, policyData);
    
    // 转换为PDF格式
    const pdfBuffer = await this.convertToPDF(filledTemplate);
    
    // 添加数字签名
    const signedPdf = await this.addDigitalSignature(pdfBuffer);
    
    return signedPdf;
  }
  
  // 获取模板方法
  async getTemplate(templateName) {
    if (this.templateCache.has(templateName)) {
      return this.templateCache.get(templateName);
    }
    
    // 从存储加载模板
    const template = await this.loadTemplateFromStorage(templateName);
    this.templateCache.set(templateName, template);
    
    return template;
  }
  
  // 其他辅助方法...
}

// 凭证推送服务
public class CertificateDeliveryService : ICertificateDeliveryService
{
    private readonly IEnumerable _deliveryChannels;
    
    public CertificateDeliveryService(IEnumerable deliveryChannels)
    {
        _deliveryChannels = deliveryChannels;
    }
    
    public async Task DeliverPolicyAsync(Policy policy, Customer customer)
    {
        // 根据客户偏好选择推送渠道
        var preferredChannel = GetPreferredChannel(customer);
        
        // 生成推送内容
        var deliveryContent = GenerateDeliveryContent(policy, customer);
        
        // 通过选择渠道发送
        var result = await preferredChannel.SendAsync(customer, deliveryContent);
        
        // 记录推送结果
        await LogDeliveryAttemptAsync(policy, customer, preferredChannel, result);
        
        return result.IsSuccessful;
    }
    
    // 获取客户偏好的推送渠道
    private IDeliveryChannel GetPreferredChannel(Customer customer)
    {
        return _deliveryChannels
            .FirstOrDefault(channel => channel.ChannelType == customer.NotificationPreference) 
            ?? _deliveryChannels.First();
    }
}