//购物车操作
var CartHelper = function () {
this.cookieName = "yxhCart";
this.Clear = function () {
var cart = new Cart();
this.Save(cart);
return cart;
};
//向购物车添加
this.Add = function (id,name,count,price) {
var cart = this.Read();
var index = this.Find(id);
//如果ID已存在，覆盖数量
if (index > -1) {
cart.Total -= (((cart.Items[index].Count 100) (cart.Items[index].Price 100)) / 10000);
cart.Items[index].Count = count;
cart.Total += (((cart.Items[index].Count 100) (cart.Items[index].Price 100)) / 10000);
} else {
var item = new CartItem();
item.Id = id;
item.Name = name;
item.Count = count;
item.Price = price;
cart.Items.push(item);
cart.Count++;
cart.Total += (((cart.Items[index].Count 100) (cart.Items[index].Price 100)) / 10000);
}
this.Save(cart);
return cart;
};
//改变数量
this.Change = function (id,count) {
var cart = this.Read();
var index = this.Find(id);
cart.Items[index].Count = count;
this.Save(cart);
return cart;
};
//移出购物车
this.Del = function (id) {
var cart = this.Read();
var index = this.Find(id);
if (index > -1) {
var item = cart.Items[index];
cart.Count--;
cart.Total = cart.Total - (((item.Count 100) (item.Price 100)) / 10000);
cart.Items.splice(index,1);
this.Save(cart);
}
return cart;
};
//根据ID查找
this.Find = function (id) {
var cart = this.Read();
var index = -1;
for (var i = 0; i < cart.Items.length; i++) {
if (cart.Items[i].Id == id) {
index = i;
}
}
return index;
};
//COOKIE操作
this.Save = function (cart) {
var source = "";
for (var i = 0; i < cart.Items.length; i++) {
if (source != "") { source += "|$|"; }
source += this.ItemToString(cart.Items[i]);
}
$.cookie(this.cookieName,source);
};
this.Read = function () {
//读取COOKIE中的集合
var source = $.cookie(this.cookieName);
var cart = new Cart();
if (source == null || source == "") {
return cart;
}
var arr = source.split("|$|");
cart.Count = arr.length;
for (var i = 0; i < arr.length; i++) {
var item = this.ItemToObject(arr[i]);
cart.Items.push(item);
cart.Total += (((item.Count 100) (item.Price * 100)) / 10000);
}
return cart;
};
this.ItemToString = function (item) {
return item.Id + "||" + escape(item.Name) + "||" + item.Count + "||" + item.Price;
};
this.ItemToObject = function (str) {
var arr = str.split('||');
var item = new CartItem();
item.Id = arr[0];
item.Name = unescape(arr[1]);
item.Count = arr[2];
item.Price = arr[3];
return item;
};
};