/// <summary>
/// 获取当前用户的购买数量
/// </summary>
/// <param name="userId">用户ID</param>
/// <returns></returns>
public async Task <int?> GetCurrentUserPurchaseCount(string id, string type)
{
int?result = null;
if (string.IsNullOrEmpty(id))
{
return(0);
}
string key = GetUserKey(id, type);
var dataInCache = await _counter.GetAsync <int>(new List <string>() { key });
if (dataInCache.Success)
{
if (dataInCache.Value != null && dataInCache.Value.Any())
{
result = dataInCache.Value.First().Value;
}
else
{
IEnumerable <int> orderIds = null;
switch (type)
{
case "userId":
orderIds = await DalFlashSale.SelectFlashSaleOrderIdsByUserAsync(_activityId, Guid.Parse(id), Guid.NewGuid().ToString(), string.Empty);
break;
case "deviceId":
orderIds = await DalFlashSale.SelectFlashSaleOrderIdsByUserAsync(_activityId, Guid.Empty, id, string.Empty);
break;
case "userTel":
orderIds = await DalFlashSale.SelectFlashSaleOrderIdsByUserAsync(_activityId, Guid.Empty, Guid.NewGuid().ToString(), id);
break;
}
var count = 0;
if (orderIds != null && orderIds.Any())
{
count = orderIds.Distinct().Count();
}
var increResult = await _counter.IncrementAsync(key, count);
if (increResult.Success)
{
if (increResult.Value > count)
{
bool decResult = await RetryDecrement(key, count);
}
else
{
result = count;
}
}
else
{
_logger.Error($"计数器设置失败, id: {id}, type: {type}, {dataInCache.Message}", dataInCache.Exception);
}
}
}
else
{
_logger.Error($"计数器获取失败, {dataInCache.Message}", dataInCache.Exception);
}
return(result);
}
