基于CI(CodeIgniter)框架实现购物车功能的方法

<?phpdefined('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;  }}?>

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;