www.gusucode.com > iWebshop开源PHP商城系统 v2.8源码程序 > iwebshop/classes/cart.php
<?php
/**
* @copyright (c) 2011 jooyea.cn
* @file cart.php
* @brief 购物车类库
* @author chendeshan
* @date 2011-04-12
* @version 0.6
*/
/**
* @class Cart
* @brief 购物车类库
*/
class Cart
{
/*购物车简单cookie存储结构
* array [goods]=>array(商品主键=>数量) , [product]=>array( 货品主键=>数量 )
*/
private $cartStruct = array( 'goods' => array() , 'product' => array() );
/*购物车复杂存储结构
* [id] :array 商品id值;
* [count]:int 商品数量;
* [info] :array 商品信息 [goods]=>array( ['id']=>商品ID , ['data'] => array( [商品ID]=>array ( [sell_price]价格, [count]购物车中此商品的数量 ,[type]类型goods,product ,[goods_id]商品ID值 ) ) ) , [product]=>array( 同上 ) , [count]购物车商品和货品数量 , [sum]商品和货品总额 ;
* [sum] :int 商品总价格;
*/
private $cartExeStruct = array('goods' => array('id' => array(), 'data' => array() ),'product' => array( 'id' => array() , 'data' => array()),'count' => 0,'sum' => 0);
//购物车名字前缀
private $cartName = 'shoppingcart';
//购物车中最多容纳的数量
private $maxCount = 100;
//错误信息
private $error = '';
//购物车的存储方式
private $saveType = 'cookie';
//构造函数
function __construct()
{
$cartInfo = $this->getMyCartStruct();
$this->setMyCart($cartInfo);
}
/**
* 获取新加入购物车的数据
* @param $cartInfo cartStruct
* @param $gid 商品或者货品ID
* @param $num 数量
* @param $type goods 或者 product
*/
public function getUpdateCartData($cartInfo,$gid,$num,$type)
{
$gid = intval($gid);
$num = intval($num);
if($type != 'goods')
{
$type = 'product';
}
//获取基本的商品数据
$goodsRow = $this->getGoodInfo($gid,$type);
if($goodsRow)
{
//购物车中已经存在此类商品
if(isset($cartInfo[$type][$gid]))
{
if($goodsRow['store_nums'] < $cartInfo[$type][$gid] + $num)
{
$this->error = '该商品库存不足';
return false;
}
$cartInfo[$type][$gid] += $num;
}
//购物车中不存在此类商品
else
{
if($goodsRow['store_nums'] < $num)
{
$this->error = '该商品库存不足';
return false;
}
$cartInfo[$type][$gid] = $num;
}
return $cartInfo;
}
else
{
$this->error = '该商品库存不足';
return false;
}
}
/**
* @brief 将商品或者货品加入购物车
* @param $gid 商品或者货品ID值
* @param $num 购买数量
* @param $type 加入类型 goods商品; product:货品;
*/
public function add($gid, $num = 1 ,$type = 'goods')
{
//购物车中已经存在此商品
$cartInfo = $this->getMyCartStruct();
if($this->getCartSort($cartInfo) >= $this->maxCount)
{
$this->error = '加入购物车失败,购物车中最多只能容纳'.$this->maxCount.'种商品';
return false;
}
else
{
$cartInfo = $this->getUpdateCartData($cartInfo,$gid,$num,$type);
if($cartInfo === false)
{
return false;
}
else
{
return $this->setMyCart($cartInfo);
}
}
}
//计算商品的种类
private function getCartSort($mycart)
{
$sumSort = 0;
$sortArray = array('goods','product');
foreach($sortArray as $sort)
{
$sumSort += count($mycart[$sort]);
}
return $sumSort;
}
//删除商品
public function del($gid , $type = 'goods')
{
$cartInfo = $this->getMyCartStruct();
if($type != 'goods')
{
$type = 'product';
}
//删除商品数据
if(isset($cartInfo[$type][$gid]))
{
unset($cartInfo[$type][$gid]);
$this->setMyCart($cartInfo);
}
else
{
$this->error = '购物车中没有此商品';
return false;
}
}
//根据 $gid 获取商品信息
private function getGoodInfo($gid, $type = 'goods')
{
$dataArray = array();
//商品方式
if($type == 'goods')
{
$goodsObj = new IModel('goods');
$dataArray = $goodsObj->getObj('id = '.$gid.' and is_del = 0','id as goods_id,sell_price,store_nums');
$dataArray['id'] = $dataArray['goods_id'];
}
//货品方式
else
{
$productObj = new IQuery('products as pro , goods as go');
$productObj->fields = ' go.id as goods_id , pro.sell_price , pro.store_nums ,pro.id ';
$productObj->where = ' pro.id = '.$gid.' and go.is_del = 0 and pro.goods_id = go.id';
$productRow = $productObj->find();
if($productRow)
{
$dataArray = $productRow[0];
}
}
return $dataArray;
}
/**
* 获取当前购物车信息
* @return 获取cartStruct数据结构
*/
public function getMyCartStruct()
{
$cartName = $this->getCartName();
if($this->saveType == 'session')
{
$cartValue = ISession::get($cartName);
}
else
{
$cartValue = ICookie::get($cartName);
}
if($cartValue == null)
{
return $this->cartStruct;
}
else
{
$cartValue = JSON::decode(str_replace(array('&','$'),array('"',','),$cartValue));
return $cartValue;
}
}
/**
* 获取当前购物车信息
* @return 获取cartExeStruct数据结构
*/
public function getMyCart()
{
$cartName = $this->getCartName();
if($this->saveType == 'session')
{
$cartValue = ISession::get($cartName);
}
else
{
$cartValue = ICookie::get($cartName);
}
if($cartValue == null)
{
return $this->cartExeStruct;
}
else
{
$cartValue = JSON::decode(str_replace(array('&','$'),array('"',','),$cartValue));
if(is_array($cartValue))
{
return $this->cartFormat($cartValue);
}
else
{
return $this->cartExeStruct;
}
}
}
//清空购物车
public function clear()
{
$cartName = $this->getCartName();
if($this->saveType == 'session')
{
ISession::clear($cartName);
}
else
{
ICookie::clear($cartName);
}
}
//写入购物车
public function setMyCart($goodsInfo)
{
$goodsInfo = str_replace(array('"',','),array('&','$'),JSON::encode($goodsInfo));
$cartName = $this->getCartName();
if($this->saveType == 'session')
{
ISession::set($cartName,$goodsInfo);
}
else
{
ICookie::set($cartName,$goodsInfo,'7200');
}
return true;
}
/**
* @brief 把cookie的结构转化成为程序所用的数据结构
* @param $cartValue 购物车cookie存储结构
* @return array : [goods]=>array( ['id']=>商品ID , ['data'] => array( [商品ID]=>array ([name]商品名称 , [img]图片地址 , [sell_price]价格, [count]购物车中此商品的数量 ,[type]类型goods,product , [goods_id]商品ID值 ) ) ) , [product]=>array( 同上 ) , [count]购物车商品和货品数量 , [sum]商品和货品总额 ;
*/
private function cartFormat($cartValue)
{
//初始化结果
$result = $this->cartExeStruct;
$goodsIdArray = array();
if(isset($cartValue['goods']) && $cartValue['goods'])
{
$goodsIdArray = array_keys($cartValue['goods']);
$result['goods']['id'] = $goodsIdArray;
foreach($goodsIdArray as $gid)
{
$result['goods']['data'][$gid] = array(
'id' => $gid,
'type' => 'goods',
'goods_id' => $gid,
'count' => $cartValue['goods'][$gid],
);
//购物车中的种类数量累加
$result['count'] += $cartValue['goods'][$gid];
}
}
if(isset($cartValue['product']) && $cartValue['product'])
{
$productIdArray = array_keys($cartValue['product']);
$result['product']['id'] = $productIdArray;
$productObj = new IModel('products');
$productData = $productObj->query('id in ('.join(",",$productIdArray).')','id,goods_id,sell_price');
foreach($productData as $proVal)
{
$result['product']['data'][$proVal['id']] = array(
'id' => $proVal['id'],
'type' => 'product',
'goods_id' => $proVal['goods_id'],
'count' => $cartValue['product'][$proVal['id']],
'sell_price' => $proVal['sell_price'],
);
if(!in_array($proVal['goods_id'],$goodsIdArray))
{
$goodsIdArray[] = $proVal['goods_id'];
}
//购物车中的种类数量累加
$result['count'] += $cartValue['product'][$proVal['id']];
}
}
if($goodsIdArray)
{
$goodsArray = array();
$goodsObj = new IModel('goods');
$goodsData = $goodsObj->query('id in ('.join(",",$goodsIdArray).')','id,name,img,sell_price');
foreach($goodsData as $goodsVal)
{
$goodsArray[$goodsVal['id']] = $goodsVal;
}
foreach($result['goods']['data'] as $key => $val)
{
$result['goods']['data'][$key]['img'] = Thumb::get($goodsArray[$val['goods_id']]['img'],120,120);
$result['goods']['data'][$key]['name'] = $goodsArray[$val['goods_id']]['name'];
$result['goods']['data'][$key]['sell_price'] = $goodsArray[$val['goods_id']]['sell_price'];
//购物车中的金额累加
$result['sum'] += $goodsArray[$val['goods_id']]['sell_price'] * $val['count'];
}
foreach($result['product']['data'] as $key => $val)
{
$result['product']['data'][$key]['img'] = Thumb::get($goodsArray[$val['goods_id']]['img'],120,120);
$result['product']['data'][$key]['name'] = $goodsArray[$val['goods_id']]['name'];
//购物车中的金额累加
$result['sum'] += $result['product']['data'][$key]['sell_price'] * $val['count'];
}
}
return $result;
}
//[私有]获取购物车名字
private function getCartName()
{
return $this->cartName;
}
//获取错误信息
public function getError()
{
return $this->error;
}
}
?>