// 使用优惠券
public bool deleteBuyerCoupon(string couponid)
{
BuyerCoupon buyerCoupon = _context.BuyerCoupons.Where(x => x.CouponId == couponid).FirstOrDefault();
if (buyerCoupon.Amount > 0)
{
buyerCoupon.Amount--;
_context.BuyerCoupons.Update(buyerCoupon);
}
else
{
_context.BuyerCoupons.Remove(buyerCoupon);
}
if (_context.SaveChanges() > 0)
{
return(true);
}
else
{
return(false);
}
}
/************************* 活动服务 *******************/
// 发布活动
public bool releaseActivity(string name, string category, DateTime startTime, DateTime endTime, string description, decimal?constrict, decimal?minus)
{
CreateIdCount createIdCount = new CreateIdCount(_context);
string activityID = createIdCount.GetActivityCount();
Activity activity = new Activity();
activity.ActivityId = activityID;
activity.Name = name;
switch (category)
{
case "全场活动": activity.Category = 1; break;
case "特类商品": activity.Category = 2; break;
case "店铺活动": activity.Category = 3; break;
case "单个商品": activity.Category = 4; break;
}
activity.StartTime = startTime;
activity.EndTime = endTime;
activity.Description = description;
_context.Activities.Add(activity); // 创建活动
// 发布优惠券
string couponID = createIdCount.GetCouponCount();
Coupon coupon = new Coupon();
coupon.CouponId = couponID;
coupon.StartTime = startTime;
coupon.EndTime = endTime;
coupon.Threshold = constrict;
coupon.Discount1 = minus;
coupon.Discount2 = 0;
switch (category)
{
case "全场活动": coupon.Category = 1; break;
case "特类商品": coupon.Category = 2; break;
case "店铺活动": coupon.Category = 3; break;
case "单个商品": coupon.Category = 4; break;
}
coupon.ShopId = "1";
coupon.ActivityId = activityID;
_context.Coupons.Add(coupon); // 添加优惠券
if (_context.SaveChanges() < 0) // 先注入优惠券，保证约束
{
return(false);
}
// 给买家发布优惠券
List <Buyer> buyers = _context.Buyers.Where(x => x.BuyerId != null).ToList();
foreach (Buyer buyer in buyers)
{
BuyerCoupon buyerCoupon = new BuyerCoupon
{
BuyerId = buyer.BuyerId,
CouponId = couponID,
Amount = 10
};
_context.BuyerCoupons.Add(buyerCoupon); // 每个买家10张优惠券
}
// 给店铺发布优惠券
CouponShop couponShop = new CouponShop
{
ShopId = "1",
CouponId = couponID,
Amount = 1000
};
_context.CouponShops.Add(couponShop); // 每个店铺1000张优惠券
if (_context.SaveChanges() > 0)
{
return(true);
}
else
{
return(false);
}
}
