增加Mediat Pip特性，并用实例来做一个demo
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@@ -1,81 +1,146 @@
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//using MediatR;
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//using Store.Framework.Models;
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//using Store.Shops.Contracts;
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//using Store.Users.Contracts.Dtos;
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//using Store.Users.Entities;
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//using Store.Users.Repositories;
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//using System;
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//using System.Collections.Generic;
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//using System.Text;
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using System.ComponentModel.DataAnnotations;
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using YourNamespace;
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using MAX.Framework.Mediation;
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using MAX.Core.Mediation;
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using Store.Users.Behaviors;
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using MAX.Core.Helpers;
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using MAX.Framework.Commons;
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using MediatR;
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using Store.Users.Contracts.Dtos;
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using Store.Users.Entities;
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//namespace Store.Users.Commands
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//{
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// /// <summary>
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// /// 商铺续费
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// /// </summary>
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// /// <param name="UserName"></param>
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// /// <param name="ShopId"></param>
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// /// <param name="RenewDuration"></param>
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// internal record class ShopRenewCommand(string UserName, string ShopId, int RenewDuration) : IRequest<ShopRenewResponse>;
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// internal class ShopRenewCommandHandler : IRequestHandler<ShopRenewCommand, ShopRenewResponse>
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// {
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// private readonly IUserRepository _userRepository;
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// private readonly IShopQueryService _shopQueryService;
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namespace Store.Users.Commands;
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// public ShopRenewCommandHandler(IUserRepository userRepository, IShopQueryService shopQueryService)
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// {
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// _userRepository = userRepository;
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// _shopQueryService = shopQueryService;
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// }
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// async Task<ShopRenewResponse> IRequestHandler<ShopRenewCommand, ShopRenewResponse>.Handle(ShopRenewCommand request, CancellationToken cancellationToken)
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// {
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// ShopRenewResponse response = new ShopRenewResponse();
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// var user = await _userRepository.GetUser(request.UserName);
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// int shopPointsPerMonth = Math.Max(30, user.ShopPointsPerMonth);
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// int deltaPoints = shopPointsPerMonth * request.RenewDuration;
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// int newPoints = (int)user.Points - deltaPoints;
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// DateTime expireTime = _shopQueryService.GetExpireTime(request.ShopId);
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/// <summary>商铺续费，续费时长单位为月。</summary>
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[MediatRBehavior(typeof(ValidationBehavior<,>))]
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[MediatRBehavior(typeof(TransactionBehavior<,>))]
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[MediatRBehavior(typeof(AccountConsumptionBehavior<,>))]
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[MediatRBehavior(typeof(ShopOwnershipBehavior<,>))]
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public sealed record ShopRenewCommand(string UserName, string ShopId, int RenewDuration, string? Remark = null)
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: IRequest<ShopRenewResponse>, IValidatableRequest, IAccountConsumptionRequest, IShopOwnershipRequest
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{
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// 由消费管道建立，仅在当前事务执行期间有效。
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AccountConsumptionContext? IAccountConsumptionRequest.ConsumptionContext { get; set; }
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ShopEntity? IShopOwnershipRequest.OwnedShop { get; set; }
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void IValidatableRequest.Validate()
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{
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if (string.IsNullOrWhiteSpace(UserName) || UserName.Trim().Length > 20)
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throw new ValidationException("用户名不能为空且长度不能超过20个字符");
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if (string.IsNullOrWhiteSpace(ShopId) || ShopId.Trim().Length > 50)
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throw new ValidationException("店铺ID不能为空且长度不能超过50个字符");
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if (RenewDuration is < 1 or > 120)
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throw new ValidationException("续费时长必须为1-120个月");
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if (Remark?.Trim().Length > 255)
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throw new ValidationException("备注长度不能超过255个字符");
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}
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ConsumptionQuote IAccountConsumptionRequest.CalculateConsumption(UserEntity user)
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{
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if (RenewDuration is < 1 or > 120)
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throw new AppException("续费时长必须为1-120个月");
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int price = Math.Max(30, user.ShopPointsPerMonth);
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return new ConsumptionQuote((decimal)price * RenewDuration, price);
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}
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}
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internal sealed class ShopRenewCommandHandler(UnitOfWorkExecutionContext executionContext)
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: IRequestHandler<ShopRenewCommand, ShopRenewResponse>
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{
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public async Task<ShopRenewResponse> Handle(ShopRenewCommand request, CancellationToken cancellationToken)
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{
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ArgumentNullException.ThrowIfNull(request);
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cancellationToken.ThrowIfCancellationRequested();
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var userName = request.UserName.Trim();
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var shopId = request.ShopId.Trim();
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var remark = string.IsNullOrWhiteSpace(request.Remark) ? null : request.Remark.Trim();
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var context = ((IAccountConsumptionRequest)request).ConsumptionContext
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?? throw new InvalidOperationException("续费命令必须通过账户消费管道执行");
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var orm = executionContext.Orm;
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var user = context.User;
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var shop = ((IShopOwnershipRequest)request).OwnedShop
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?? throw new InvalidOperationException("续费命令必须通过商铺归属管道执行");
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decimal pointsPerMonth = context.Quote.UnitPrice;
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decimal cost = context.Quote.Amount;
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decimal newPoints = user.Points - cost;
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var now = DateTime.Now;
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var currentExpire = await orm.Select<ShopExpireEntity>().Where(a => a.ShopId == shopId)
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.FirstAsync(cancellationToken);
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var expireBase = now;
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if (currentExpire is { ExpireTime: > 0 })
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{
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var currentTime = DateHelper.ConvertFromUnixTimestampInSeconds(currentExpire.ExpireTime);
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if (currentTime > expireBase)
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expireBase = currentTime;
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}
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int newExpireTime = CalculateNewExpireTime(expireBase, request.RenewDuration);
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// if (currentExpire != null && currentExpire.ExpireTime > 0)
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// {
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// DateTime currentExpireTime = TimeUtils.StampToDateTime(currentExpire.ExpireTime);
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// if (currentExpireTime > expireBaseTime)
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// {
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// expireBaseTime = currentExpireTime;
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// }
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// }
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int affected = await orm.Update<UserEntity>().Set(a => a.Points, newPoints)
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.Where(a => a.Id == user.Id && a.Points == user.Points)
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.ExecuteAffrowsAsync(cancellationToken);
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if (affected != 1)
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throw new AppException("账户已发生改变，请刷新账户后重新操作");
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// int newExpireTime = CalculateNewExpireTime(expireBaseTime, request.RenewDuration);
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for (int i = 0; i < request.RenewDuration; i++)
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{
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var record = new UserPointsRecordEntity
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{
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OptionType = "续费",
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OperatorType = "用户",
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OperatorName = userName,
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UserName = userName,
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UserNick = user.NickName,
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DeltaPoints = pointsPerMonth,
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NewPoints = user.Points - (decimal)pointsPerMonth * (i + 1),
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ShopId = shop.ShopId,
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ShopAccount = shop.ShopAccount,
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Remark = remark,
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AddTime = now.AddSeconds(i)
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};
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if (await orm.Insert(record).ExecuteAffrowsAsync(cancellationToken) != 1)
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throw new AppException("新增操作记录失败，请稍候重试");
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}
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if (currentExpire == null)
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{
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affected = await orm.Insert(new ShopExpireEntity
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{
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ShopId = shopId,
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ExpireTime = newExpireTime,
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AddTime = now,
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MdyTime = now
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}).ExecuteAffrowsAsync(cancellationToken);
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}
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else
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{
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affected = await orm.Update<ShopExpireEntity>()
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.Set(a => a.ExpireTime, newExpireTime).Set(a => a.MdyTime, now)
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.Where(a => a.Id == currentExpire.Id && a.ExpireTime == currentExpire.ExpireTime)
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.ExecuteAffrowsAsync(cancellationToken);
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}
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if (affected != 1)
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throw new AppException("更新商铺过期时间失败，请刷新店铺后重新操作");
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cancellationToken.ThrowIfCancellationRequested();
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return new ShopRenewResponse { ShopId = shopId, UserPoints = newPoints, ExpireTime = newExpireTime };
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}
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// response.ShopId = request.ShopId;
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// response.UserPoints = newPoints;
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// response.ExpireTime = newExpireTime;
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// return response;
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// }
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// private int CalculateNewExpireTime(DateTime expireBaseTime, int renewDuration)
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// {
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// DateTime newExpireDateTime;
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// try
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// {
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// newExpireDateTime = expireBaseTime.AddMonths(renewDuration);
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// }
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// catch (ArgumentOutOfRangeException)
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// {
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// throw new InvalidOperationException("续费时长超出允许范围");
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// }
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// if (newExpireDateTime > TimeUtils.StampToDateTime(int.MaxValue))
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// {
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// throw new InvalidOperationException("续费时间超出系统支持范围");
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// }
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// return TimeUtils.DateTimeToTimestampSeconds(newExpireDateTime);
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// }
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// }
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//}
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private static int CalculateNewExpireTime(DateTime expireBase, int duration)
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{
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DateTime newExpireDate;
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try
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{
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newExpireDate = expireBase.AddMonths(duration);
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}
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catch (ArgumentOutOfRangeException)
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{
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throw new AppException("续费时长超出允许范围");
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}
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long timestamp = DateHelper.GetUnixTimestampInSeconds(newExpireDate);
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if (timestamp > int.MaxValue || timestamp < 0)
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throw new AppException("续费时间超出系统支持范围");
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return (int)timestamp;
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}
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}
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