Comment implémenter la fonction de panier d'achat basée sur le framework CodeIgniter

<?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;

  }

}

?>

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;