购物车功能【CI实现】

在商城项目中，购物车是非常重要的一环，此处留下源码，留作笔记！！！

话不多说，往下看:

1---源代码

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class cart extends Home_Controller {
private $info = array(); #前台提交数据
private $specData = array(); #规格信息
private $prodData = array(); #货品组合信息
private $cartData = array(); #购物车入库数据

/**
* 构造函数
*/
public function __construct()
{
parent::__construct();
$this->load->model('goodsModel','goods');
$this->load->model('productModel','product');
$this->load->model('goodsAttrModel','goodsAttr');
}

/**
* [购物车]数据添加
*/
public function cartAdd()
{
#接收购物车提交数据
$this->info = $this->input->post();
// $this->ajaxReturn($this->info);
#1.验证商品库存、货品库存
$this->checkGoodsNumber();
#2.查询规格名称、价格
$this->getSpecData();
#3.组装购物车添加de数据
$cartData = $this->setCartData();
p(json_decode($this->input->cookie('cart'),true));
# 一、判断是否登录
if(!UID){
//未登录 数据存入Cookie中
//1:获取cookie中的购物车数据
$cookieCartData = $this->input->cookie('cart');
//2:判断cookie中数据是否为空
if(empty($cookieCartData)){
//2-1:为空则表示用户没有添加过购物车
//2-1-1.设置Key-->生成购物车数据
$key = $cartData['goods_id'].'-'.$cartData['product_id'];
$cookieCart = array($key => $cartData);
//2-1-2.设置购物车返回值(商品数量、总价)
$this->setCartReturn(1,$cartData['goods_price']);
//2-1-3.设置Cookie存储购物车数据
}else{
//2-2:不为空 表示用户添加过购物车
//2-2-1.追加购物数据
$cookieCart = $this->addCartData($cartData,json_decode($cookieCartData,true));
//2-2-2.设置购物车返回值(商品数量、总价)
$this->setCartReturn(count($cookieCart),array_sum(array_column($cookieCart, 'goods_price')));
}
//3:设置Cookie存储购物车数据
setCookie('cart',json_encode($cookieCart),LEFT_TIME,'/');
}else{
//已登录 数据存入数据库

}
//返回购物车提示数据
$this->ajaxReturn($this->msg);
}

/**
* 验证商品库存
*/
public function checkGoodsNumber()
{
$this->goods->map = array(
'goods_id' => $this->info['goods_id'],
'goods_number >=' => $this->info['buy_number'],
);
$this->goods = $this->goods->find('goods_id,goods_name,goods_sn,goods_img,shop_price');
if(!$this->goods){
$this->msg['msg'] = "商品库存不足";
$this->ajaxReturn($this->msg);
}
#验证货品库存
$this->product->map = array(
'goods_id' => $this->info['goods_id'],
'product_attr' => $this->info['prod_attr'],
'product_number >=' => $this->info['buy_number'],
);
$this->prodData = $this->product->find();
if(!$this->prodData){
$this->msg['msg'] = "货品库存不足";
$this->ajaxReturn($this->msg);
}
return true;
}

/**
* 组合规格名称、价格
*/
public function getSpecData()
{
$this->goodsAttr->map = inToType(explode("|", $this->info['prod_attr']),'goods_attr_id');
$goodsAttrInfo = $this->goodsAttr->select('goods_attr_value,goods_attr_price');
$this->specData['product_attr_value'] = implode("|", array_column($goodsAttrInfo, 'goods_attr_value'));
$this->specData['product_price'] = array_sum(array_column($goodsAttrInfo,'goods_attr_price'));
# 返回规格信息 $this->specData
}

/**
* 组装购物车添加的数组
*/
public function setCartData()
{
$this->cartData = array(
'product_id' => $this->prodData['product_id'],
'product_attr' => $this->prodData['product_attr'],
'buy_number' => $this->info['buy_number'],
'goods_price' => $this->info['shop_price'],
'goods_sum' => $this->info['shop_price'] * $this->info['buy_number'],
'product_price' => '',
'product_attr_value' => '',
'uid' => UID,

);
$this->cartData = array_merge($this->cartData,$this->goods);
#若存在规格【添加规格信息】
if(!empty($this->info['prod_attr'])){
$this->cartData['product_price'] = $this->specData['product_price'];
$this->cartData['product_attr_value'] = $this->specData['product_attr_value'];
}
return $this->cartData;
# 购物车 添加的总数据 $this->cartData;
}

/**
* 设置购物车返回提示数据
* @param [商品数量,总价]
*/
public function setCartReturn($number,$prices)
{
$this->msg['code'] = self::STATUS_ON;
$this->msg['data'] = array(
'number' => $number,
'prices' => $prices,
);
}

/**
* 购物车 新添加数据
* @param [新数据,原购物车数据]
*/
public function addCartData($newData,$oldData)
{
#组合Key
$key = $newData['goods_id'].'-'.$newData['product_id'];
// #判断购物车中是否有该商品
if(isset($oldData[$key])){
//1.有 合并商品数量、价格
$oldData[$key]['buy_number'] = $oldData[$key]['buy_number'] + $newData['buy_number'];
$oldData[$key]['goods_price'] = $newData['goods_price'];
$oldData[$key]['goods_sum'] = $oldData[$key]['buy_number'] * $oldData[$key]['goods_price'];
}else{
//2.没有 追加新商品
$oldData[$key] = $newData;
}
#返回购物车数据
return $oldData;
}

}
?>

2---数据库

CREATE TABLE `shop_goods` (
`goods_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`goods_name` varchar(255) NOT NULL,
`type_id` int(11) DEFAULT NULL,
PRIMARY KEY (`goods_id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;

CREATE TABLE `shop_product` (
`product_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`goods_id` int(11) NOT NULL,
`goods_price` decimal(10,2) NOT NULL,
`goods_num` int(11) NOT NULL,
`goods_sn` varchar(50) NOT NULL,
`goods_attr_id` varchar(100) NOT NULL,
PRIMARY KEY (`product_id`)
) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8;

CREATE TABLE `shop_goods_attr` (
`goods_attr_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`goods_id` int(11) NOT NULL,
`attr_id` int(11) NOT NULL,
`attr_value` varchar(255) NOT NULL,
PRIMARY KEY (`goods_attr_id`)
) ENGINE=InnoDB AUTO_INCREMENT=126 DEFAULT CHARSET=utf8;

CI购物车总结完毕！！！