109 lines
6.9 KiB
C#
109 lines
6.9 KiB
C#
using System.ComponentModel.DataAnnotations;
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using MAX.Framework.Validation;
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using FreeSql;
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using MAX.Core.DependencyInjection;
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using MAX.Framework.Commons;
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using MAX.Framework.Security;
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using Store.Users.Contracts.Dtos;
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using Store.Users.Entities;
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namespace Store.Users.Services;
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/// <summary>资金写入集中在事务中完成。账户行锁防止超扣，流水与余额同提交、同回滚。</summary>
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public sealed class UserFundsService(IFreeSql orm, ICurrentUser currentUser) : ITransientDependency
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{
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public async Task<UserFundsResponse> Change(UserFundsRequest request, bool points, CancellationToken ct)
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{
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RequestValidator.Validate(request);
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// DTO 只检查非空，其余长度、金额和操作组合在服务中手动判断。
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UserInputChecks.Length(request.UserName, 20, "目标账户");
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UserInputChecks.Length(request.RequestId, 64, "请求号");
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UserInputChecks.Length(request.Remark, 255, "备注");
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if (request.Amount is < 0.01m or > 1000000m)
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throw new ValidationException("金额必须为0.01-1000000");
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if (decimal.Round(request.Amount, 2) != request.Amount)
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throw new ValidationException("金额最多保留两位小数");
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if (points ? request.Operation is not ("充值" or "转移") : request.Operation is not ("充值" or "消费"))
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throw new ValidationException("不支持的资金操作类型");
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ct.ThrowIfCancellationRequested();
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if (!currentUser.IsAuthenticated || string.IsNullOrWhiteSpace(currentUser.UserName)) throw new UnauthorizedAccessException();
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using var work = orm.CreateUnitOfWork();
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work.GetOrBeginTransaction();
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var db = work.Orm;
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var actor = await db.Select<UserEntity>().Where(u => u.UserName == currentUser.UserName).FirstAsync(ct)
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?? throw new UnauthorizedAccessException();
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bool transfer = points && request.Operation == "转移";
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if (!transfer && actor.SaLevel != 1) throw new AppException("充值和余额调整仅允许管理员操作", 403);
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var name = request.UserName.Trim();
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var target = await db.Select<UserEntity>().Where(u => u.UserName == name).FirstAsync(ct)
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?? throw new AppException("目标账户不存在");
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if (transfer && actor.Id == target.Id) throw new AppException("不能向自己转移积分");
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if (transfer && !UserAccessPolicy.CanManage(actor, target))
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throw new AppException("只能向管理范围内的账户转移积分", 403);
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// 双账户转移按相同主键顺序加锁，避免双方同时转账时产生反向锁顺序。
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var ids = transfer ? new[] { actor.Id, target.Id }.Order().ToArray() : new[] { target.Id };
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foreach (var id in ids)
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{
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var locked = await db.Select<UserEntity>().Where(u => u.Id == id).ForUpdate().FirstAsync(ct)
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?? throw new AppException("账户已被删除");
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if (id == target.Id) target = locked;
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if (id == actor.Id) actor = locked;
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}
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var key = "user:" + request.RequestId.Trim();
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// 持有目标行锁后检查请求号，相同账户的并发重试只能执行一次。
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bool duplicate = points
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? await db.Select<UserPointsRecordEntity>().Where(r => r.UserName == target.UserName && r.OutTradeNo == key).AnyAsync(ct)
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: await db.Select<UserPaymentRecordEntity>().Where(r => r.UserName == target.UserName && r.RefundFlowNo == key).AnyAsync(ct);
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if (duplicate) throw new AppException("该请求已处理，请查询流水确认结果，勿重复提交");
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decimal value;
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if (points)
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{
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value = checked(target.Points + request.Amount);
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if (transfer)
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{
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if (actor.Points < request.Amount) throw new AppException("积分不足");
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if (await db.Update<UserEntity>().Set(u => u.Points, actor.Points - request.Amount)
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.Where(u => u.Id == actor.Id && u.Points == actor.Points).ExecuteAffrowsAsync(ct) != 1)
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throw new AppException("转出账户状态已改变");
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await AddPointsRecord(db, actor, actor, request.Amount, actor.Points - request.Amount,
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"转出", target.UserName, key, request.Remark, ct);
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}
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var update = db.Update<UserEntity>().Set(u => u.Points, value)
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.Where(u => u.Id == target.Id && u.Points == target.Points);
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// 延续原系统口径：积分转入也计入接收方累计充值。
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update = update.Set(u => u.RechargePointsTotal, checked((target.RechargePointsTotal ?? 0) + request.Amount));
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if (await update.ExecuteAffrowsAsync(ct) != 1) throw new AppException("账户状态已改变");
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await AddPointsRecord(db, target, actor, request.Amount, value, transfer ? "转入" : "充值",
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transfer ? actor.UserName : null, key, request.Remark, ct);
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}
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else
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{
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bool recharge = request.Operation == "充值";
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value = checked((target.Balance ?? 0) + (recharge ? request.Amount : -request.Amount));
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if (value < 0) throw new AppException("余额不足");
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var update = db.Update<UserEntity>().Set(u => u.Balance, value).Where(u => u.Id == target.Id && u.Balance == target.Balance);
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if (recharge) update = update.Set(u => u.RechargeAmountTotal, checked((target.RechargeAmountTotal ?? 0) + request.Amount));
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if (await update.ExecuteAffrowsAsync(ct) != 1) throw new AppException("账户状态已改变");
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if (await db.Insert(new UserPaymentRecordEntity
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{
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UserName = target.UserName, Type = recharge ? 1 : 0, Amount = request.Amount, Balance = value,
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CreateBy = actor.UserName, CreateTime = DateTime.Now, Remark = request.Remark ?? "",
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PlatformCode = "", OrderId = "", UpdateBy = "", CounterpartyAccountName = "", RefundFlowNo = key
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}).ExecuteAffrowsAsync(ct) != 1) throw new AppException("写入余额流水失败");
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}
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ct.ThrowIfCancellationRequested();
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work.Commit();
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return new(target.UserName, value, request.RequestId);
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}
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private static async Task AddPointsRecord(IFreeSql db, UserEntity user, UserEntity actor, decimal amount,
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decimal value, string operation, string? counterparty, string key, string? remark, CancellationToken ct)
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{
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if (await db.Insert(new UserPointsRecordEntity
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{
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UserName = user.UserName, UserNick = user.NickName, DeltaPoints = amount, NewPoints = value,
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OptionType = operation, OperatorType = actor.SaLevel == 1 ? "管理员" : "用户", OperatorName = actor.UserName,
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CounterpartyAccountName = counterparty, OutTradeNo = key, Remark = remark, AddTime = DateTime.Now
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}).ExecuteAffrowsAsync(ct) != 1) throw new AppException("写入积分流水失败");
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}
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}
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