flutter_paydemo/lib/models/checkout.dart

/// 网页收银台相关模型
library;

/// 收银台会话创建响应
/// 字段随渠道不同而变化：
/// - wechat: [codeUrl]
/// - alipay/stripe: [redirectUrl]
class CheckoutSessionResponse {
  final String channel;
  final String paymentId;
  final String? codeUrl;
  final String? redirectUrl;
  final String? htmlForm;

  CheckoutSessionResponse({
    required this.channel,
    required this.paymentId,
    this.codeUrl,
    this.redirectUrl,
    this.htmlForm,
  });

  toJson() => {
        'channel': channel,
        'payment_id': paymentId,
        'code_url': codeUrl,
        'redirect_url': redirectUrl,
        'html_form': htmlForm,
      };

  static CheckoutSessionResponse fromJson(Map<String, dynamic> json) {
    return CheckoutSessionResponse(
      channel: json['channel'],
      paymentId: json['payment_id'],
      codeUrl: json['code_url'],
      redirectUrl: json['redirect_url'],
      htmlForm: json['html_form'],
    );
  }
}

/// 收银台会话状态查询响应
class CheckoutSessionStatus {
  final String paymentId;
  final bool success;
  final String note;

  CheckoutSessionStatus({
    required this.paymentId,
    required this.success,
    required this.note,
  });

  static CheckoutSessionStatus fromJson(Map<String, dynamic> json) {
    return CheckoutSessionStatus(
      paymentId: json['payment_id'],
      success: json['success'] ?? false,
      note: json['note'] ?? '',
    );
  }
}