/// <summary>
/// 抽奖/兑奖
/// </summary>
/// <param name="user"></param>
/// <param name="request"></param>
/// <param name="requestAborted"></param>
/// <returns></returns>
public async Task <ResponseMessage <GiftInfo> > ConsumableScoreAsync(UserInfo user, ConsumableScoreRequest request, CancellationToken requestAborted)
{
var response = new ResponseMessage <GiftInfo>();
var periodGift = await _giftStore.GetPeriodGifts().Where(w => w.PeriodId == request.PeriodId).FirstOrDefaultAsync();
if (periodGift == null || periodGift.Enabled == false)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "当前赛季奖品暂未开放";
return(response);
}
//抽奖
if (request.ConsumableType == 1)
{
var giftInfoList = await _giftStore.GetGiftInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId).ToListAsync();
if (!giftInfoList.Any())
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "没有奖品可供抽取";
return(response);
}
var scoreInfo = await _allocateStore.GetScoreInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId && w.UserId == user.Id).FirstOrDefaultAsync();
if (scoreInfo == null)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "未查询到您的积分信息";
return(response);
}
if (scoreInfo.ConsumableScore < periodGift.Score)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "您的可消费K币不足,赶紧去赚点K币吧";
return(response);
}
//总几率
var sumOdds = giftInfoList.Sum(s => s.Odds);
if (sumOdds > 1000)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "奖品设置异常,请联系管理员。";
return(response);
}
var giftList = giftInfoList.Where(w => w.Number != 0).ToList();//排除抽完的奖品
if (!giftList.Any())
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "所有奖品已被抽取/兑换完,请等待新奖品上架吧。";
return(response);
}
//将奖品ID和中奖率放在数组中,并从小到大排序
var prizeList = giftList.Select(s => new { Prize = s.Id, Change = s.Odds }).OrderBy(o => o.Change).ToList();
//将中奖率累加,放到字典里
var prizeDictionary = new Dictionary <string, int>();
for (var i = 0; i < giftList.Count; i++)
{
var allChange = 0;
for (var j = 0; j <= i; j++)
{
allChange += prizeList[j].Change;
}
prizeDictionary.Add(prizeList[i].Prize, allChange);
}
//产生一个1-1000的随机数
var rd = new Random();
var rdChange = rd.Next(1, 1001);
//找第一个大于随机值的奖项，如果中途有奖品抽完了，找不到到大于随机值的奖项，就直接取几率最大
var giftResult_Id = prizeDictionary.FirstOrDefault(j => j.Value >= rdChange).Key ?? prizeDictionary.LastOrDefault().Key;
var giftInfo = giftInfoList.FirstOrDefault(fi => fi.Id == giftResult_Id);
if (giftInfo.Number > 0)
{
giftInfo.Number -= 1;
}
//事务保存
using (var trans = await _transaction.BeginTransaction())
{
try
{
//事务里面重新查一次
scoreInfo = await _allocateStore.GetScoreInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId && w.UserId == user.Id).FirstOrDefaultAsync();
if (scoreInfo == null)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "未查询到您的积分信息";
return(response);
}
scoreInfo.ConsumableScore = scoreInfo.ConsumableScore - periodGift.Score;
await _allocateStore.UpdateScoreInfo(scoreInfo, requestAborted);
await _giftStore.UpdateGift(giftInfo, requestAborted);
//添加抽奖动态
await _dynamicHelper.AddDynamicContent(
DynamicType.RandomGift,
request.PeriodId,
giftInfo.Id,
null,
null,
user.UserName,
user.GroupName,
user.Id,
giftInfo.Name,
periodGift.Score,
null,
null
);
trans.Commit();
}
catch (Exception e)
{
trans.Rollback();
throw new Exception("保存事务失败", e);
}
}
response.Extension = giftInfo;
}
//兑奖
else if (request.ConsumableType == 2)
{
var scoreInfo = await _allocateStore.GetScoreInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId && w.UserId == user.Id).FirstOrDefaultAsync();
if (scoreInfo == null)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "未查询到您的积分信息";
return(response);
}
var giftInfo = await _giftStore.GetGiftInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId && w.Number != 0 && w.Id == request.GiftId).FirstOrDefaultAsync();
if (giftInfo == null)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "兑换奖品不存在";
return(response);
}
if (!giftInfo.IsGet)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = $"兑换奖品{giftInfo.Name}不运行直接兑换";
return(response);
}
if (scoreInfo.ConsumableScore < giftInfo.GetScore)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "您的可消费K币不足,赶紧去赚点K币吧";
return(response);
}
if (giftInfo.Number == 0)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "奖品数量不足不能直接兑换";
return(response);
}
if (giftInfo.Number > 0)
{
giftInfo.Number -= 1;
}
//事务保存
using (var trans = await _transaction.BeginTransaction())
{
try
{
//事务里面重新查一次
scoreInfo = await _allocateStore.GetScoreInfos().Where(w => !w.IsDelete && w.PeriodId == request.PeriodId && w.UserId == user.Id).FirstOrDefaultAsync();
if (scoreInfo == null)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "未查询到您的积分信息";
trans.Rollback();
return(response);
}
scoreInfo.ConsumableScore = scoreInfo.ConsumableScore - giftInfo.GetScore;
await _allocateStore.UpdateScoreInfo(scoreInfo, requestAborted);
await _giftStore.UpdateGift(giftInfo, requestAborted);
//添加直接兑换动态
await _dynamicHelper.AddDynamicContent(
DynamicType.GetGift,
request.PeriodId,
giftInfo.Id,
null,
null,
user.UserName,
user.GroupName,
user.Id,
giftInfo.Name,
periodGift.Score,
null,
null
);
trans.Commit();
}
catch (Exception e)
{
trans.Rollback();
throw new Exception("保存事务失败", e);
}
}
response.Extension = giftInfo;
}
else
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "ConsumableType参数错误";
return(response);
}
// 触发个人信息变化
await _sendClientMessageManager.SendInfos(new List <Dto.Common.SendClientType>()
{
Dto.Common.SendClientType.User,
Dto.Common.SendClientType.Dynamic
});
return(response);
}
public async Task <ResponseMessage <GiftInfo> > ConsumableScore(Models.UserInfo user, [FromBody] ConsumableScoreRequest request)
{
Logger.Trace($"用户{user?.UserName ?? ""}({user?.Id ?? ""})抽奖，请求参数为：\r\n" + JsonHelper.ToJson(request));
var response = new ResponseMessage <GiftInfo>();
if (!ModelState.IsValid)
{
response.Code = ResponseCodeDefines.ModelStateInvalid;
response.Message = "模型验证失败" + ModelState.GetAllErrors();
Logger.Warn("抽奖模型验证失败：\r\n{0}", response.Message ?? "");
return(response);
}
var prefixs = new string[] { "ConsumableScore" };
var key = "ConsumableScore";
try
{
// 防止同时中奖,兑奖,数量不够。所以这里是一个一个来
await _cache.LockSubmit(prefixs, key, "ConsumableScore", HttpContext.RequestAborted);
response = await _giftManager.ConsumableScoreAsync(user, request, HttpContext.RequestAborted);
}
catch (Exception e)
{
response.Code = ResponseCodeDefines.ServiceError;
response.Message = e.Message;
Logger.Error($"用户{user?.UserName ?? ""}({user?.Id ?? ""})抽奖，报错：{e.Message}\r\n{e.StackTrace}");
}
finally
{
// 成功失败都要移除
await _cache.UnlockSubmit(prefixs, key);
}
return(response);
}