public static Expression <Func <TScene, decimal> > GetIntegralExpression <TScene>(this Pharos.Logic.Entity.ReturnRules entity, Func <int, Expression, MemberExpression> memberExpression)//注：此处Pharos.Logic.Entity.ReturnRules引用在下次底层数据访问重构时候，新建Dao进行解耦
where TScene : IScene, new()
{
var p = Expression.Parameter(typeof(TScene), "p");
MemberExpression propertyName = memberExpression(entity.Mode, p);
Expression body = null;
switch (entity.OperationType) //返赠运算方式(0：按固定值；1：按固定比例；2：动态配置)
{
case 235:
body = Expression.Constant(Convert.ToDecimal(entity.Expression));
break;
case 236:
var rateConstant = Expression.Constant(Convert.ToDecimal(entity.Expression));
body = Expression.Multiply(rateConstant, propertyName);
break;
case 237: //TODO Call Dynamic Expression
break;
}
return(Expression.Lambda <Func <TScene, decimal> >(body, p));
}
public static Expression <Func <TScene, bool> > GetVerifyExpression <TScene>(this Pharos.Logic.Entity.ReturnRules entity, int providerId, Func <int, Expression, MemberExpression> memberExpression)
where TScene : IScene, new()
//注：此处Pharos.Logic.Entity.ReturnRules引用在下次底层数据访问重构时候，新建Dao进行解耦
{
var datetimeNow = DateTime.Now;
switch (entity.AgingType)//时效匹配
{
case 1:
var dayOfWeeks = new int[] {
!string.IsNullOrEmpty(entity.StartTime1)? Convert.ToInt32(entity.StartTime1):-1,
!string.IsNullOrEmpty(entity.StartTime2)? Convert.ToInt32(entity.StartTime2):-1,
!string.IsNullOrEmpty(entity.StartTime3)? Convert.ToInt32(entity.StartTime3):-1,
!string.IsNullOrEmpty(entity.EndTime1)? Convert.ToInt32(entity.EndTime1):-1,
!string.IsNullOrEmpty(entity.EndTime2)? Convert.ToInt32(entity.EndTime2):-1,
!string.IsNullOrEmpty(entity.EndTime3)? Convert.ToInt32(entity.EndTime3):-1,
};
if (!dayOfWeeks.Where(o => o != -1).Contains((int)datetimeNow.DayOfWeek))
{
return(null);
}
break;
case 2:
var dayRanges = new KeyValuePair <DateTime, DateTime>[] {
string.IsNullOrEmpty(entity.StartTime1) || string.IsNullOrEmpty(entity.EndTime1)?
default(KeyValuePair <DateTime, DateTime>):
new KeyValuePair <DateTime, DateTime>(
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.StartTime1),
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.EndTime1)
),
string.IsNullOrEmpty(entity.StartTime2) || string.IsNullOrEmpty(entity.EndTime2)?
default(KeyValuePair <DateTime, DateTime>):
new KeyValuePair <DateTime, DateTime>(
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.StartTime2),
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.EndTime2)
),
string.IsNullOrEmpty(entity.StartTime3) || string.IsNullOrEmpty(entity.EndTime3)?
default(KeyValuePair <DateTime, DateTime>):
new KeyValuePair <DateTime, DateTime>(
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.StartTime3),
Convert.ToDateTime(datetimeNow.ToString("yyyy-MM-dd") + " " + entity.EndTime3)
),
};
if (!dayRanges.Any(o => o.Key <= datetimeNow && o.Value >= datetimeNow))
{
return(null);
}
break;
}
var p = Expression.Parameter(typeof(TScene), "p");
MemberExpression propertyName = memberExpression(entity.Mode, p);
Expression body = null;
//计量范围
Expression expression1 = GetLogicalOperationExpression(entity.LeftSign, entity.Number1, propertyName);
if (entity.RightSign.HasValue && entity.Number2.HasValue)
{
var expression2 = GetLogicalOperationExpression(entity.RightSign.Value, entity.Number2.Value, propertyName);
body = Expression.AndAlso(expression1, expression2);
}
else
{
body = expression1;
}
//限制规则提供程序
var limitProvider = Expression.Constant(entity.Adapters);
var currentProvider = Expression.Constant(providerId);
var ifEqualProvider = Expression.Equal(limitProvider, currentProvider);
body = Expression.AndAlso(ifEqualProvider, body);
//会员限定
if (!string.IsNullOrEmpty(entity.MemberLevelId) && entity.MemberLevelId != "-1")
{
var level = Expression.Property(Expression.Property(p, "Member"), "MemberLevelId");
body = Expression.AndAlso(body, Expression.Equal(Expression.Constant(entity.MemberLevelId), level));
}
return(Expression.Lambda <Func <TScene, bool> >(body, p));
}
