<?php
/**
 * 购物车模型
 *
 *
 *
 * * @FeiWa (c) 2015-2018 FeiWa   (http://www.feiwa.org)
 * @license    http://www.feiwa.org
 * @link       联系电话：0539-889333 客服QQ：2116198029
 * @since      山东破浪网络科技有限公司提供技术支持 授权请购买FeiWa授权
 */
defined('ByFeiWa') or exit('Access Invalid!');
class cartModel extends Model {

    /**
     * 购物车商品总金额
     */
    private $cart_all_price = 0;

    /**
     * 购物车商品总数
     */
    private $cart_goods_num = 0;

    public function __construct() {
       parent::__construct('cart');
    }

    /**
     * 取属性值魔术方法
     *
     * @param string $name
     */
    public function __get($name) {
        return $this->$name;
    }

    /**
     * 检查购物车内商品是否存在
     *
     * @param
     */
    public function checkCart($condition = array()) {
        return $this->where($condition)->find();
    }

    /**
     * 会员购物车内商品数
     *
     * @param int $memberId
     * @return int
     */
    public function countCartByMemberId($memberId)
    {
        return (int) $this->where(array(
            'buyer_id' => (int) $memberId,
        ))->count();
    }

    /**
     * 取得 单条购物车信息
     * @param unknown $condition
     * @param string $field
     */
    public function getCartInfo($condition = array(), $field = '*') {
       return $this->field($field)->where($condition)->find();
    }

    /**
     * 将商品添加到购物车中
     *
     * @param array $data   商品数据信息
     * @param string $save_type 保存类型，可选值 db,cookie
     * @param int $quantity 购物数量
     */
    public function addCart($data = array(), $save_type = '', $quantity = null) {
        $method = '_addCart'.ucfirst($save_type);
        $insert = $this->$method($data,$quantity);
        //更改购物车总商品数和总金额，传递数组参数只是给DB使用
        $this->getCartNum($save_type,array('buyer_id'=>$data['buyer_id']));
        return $insert;
    }

    /**
     * 添加数据库购物车
     *
     * @param unknown_type $goods_info
     * @param unknown_type $quantity
     * @return unknown
     */
    private function _addCartDb($goods_info = array(),$quantity) {
        //验证购物车商品是否已经存在
        $condition = array();
        $condition['goods_id'] = $goods_info['goods_id'];
        $condition['buyer_id'] = $goods_info['buyer_id'];
        if (isset($goods_info['bl_id'])) {
            $condition['bl_id'] = $goods_info['bl_id'];
        } else {
            $condition['bl_id'] = 0;
        }
        $check_cart = $this->checkCart($condition);
        if (!empty($check_cart)) return true;

        $array    = array();
        $array['buyer_id']  = $goods_info['buyer_id'];
        $array['store_id']  = $goods_info['store_id'];
        $array['goods_id']  = $goods_info['goods_id'];
        $array['goods_name'] = $goods_info['goods_name'];
        $array['goods_price'] = $goods_info['goods_price'];
        $array['goods_num']   = $quantity;
        $array['goods_image'] = $goods_info['goods_image'];
        $array['store_name'] = $goods_info['store_name'];
        $array['bl_id'] = isset($goods_info['bl_id']) ? $goods_info['bl_id'] : 0;
        return $this->insert($array);
    }

    /**
     * 添加到cookie购物车,最多保存5个商品
     *
     * @param unknown_type $goods_info
     * @param unknown_type $quantity
     * @return unknown
     */
    private function _addCartCookie($goods_info = array(), $quantity = null) {
        //去除斜杠
        $cart_str = get_magic_quotes_gpc() ? stripslashes(cookie('cart')) : cookie('cart');
        $cart_str = base64_decode(decrypt($cart_str));
        $cart_array = @unserialize($cart_str);
        $cart_array = !is_array($cart_array) ? array() : $cart_array;
        if (count($cart_array) >= 5) return false;

        if (in_array($goods_info['goods_id'],array_keys($cart_array))) return true;
        $cart_array[$goods_info['goods_id']] = array(
          'store_id' => $goods_info['store_id'],
          'goods_id' => $goods_info['goods_id'],
          'goods_name' => $goods_info['goods_name'],
          'goods_price' => $goods_info['goods_price'],
          'goods_image' => $goods_info['goods_image'],
          'goods_num' => $quantity
        );
        setNcCookie('cart',encrypt(base64_encode(serialize($cart_array))),24*3600);
        return true;
    }

    /**
     * 更新购物车
     *
     * @param   array   $param 商品信息
     */
    public function editCart($data,$condition) {
        $result = $this->where($condition)->update($data);
        if ($result) {
            $this->getCartNum('db',array('buyer_id'=>$condition['buyer_id']));
        }
        return $result;
    }

    /**
     * 购物车列表
     *
     * @param string $type 存储类型 db,cookie
     * @param unknown_type $condition
     * @param int $limit
     */
    public function listCart($type, $condition = array(), $limit = '') {
        if ($type == 'db') {
            $cart_list = $this->where($condition)->limit($limit)->select();
        } elseif ($type == 'cookie') {
            //去除斜杠
            $cart_str = get_magic_quotes_gpc() ? stripslashes(cookie('cart')) : cookie('cart');
            $cart_str = base64_decode(decrypt($cart_str));
            $cart_list = @unserialize($cart_str);
        }
        $cart_list = is_array($cart_list) ? $cart_list : array();
        //顺便设置购物车商品数和总金额
        $this->cart_goods_num =  count($cart_list);
        $cart_all_price = 0;
        if(is_array($cart_list)) {
            foreach ($cart_list as $val) {
                $cart_all_price += $val['goods_price'] * $val['goods_num'];
            }
        }
        $this->cart_all_price = ncPriceFormat($cart_all_price);
        return !is_array($cart_list) ? array() : $cart_list;
    }

    /**
     * 删除购物车商品
     *
     * @param string $type 存储类型 db,cookie
     * @param unknown_type $condition
     */
    public function delCart($type, $condition = array()) {
        if ($type == 'db') {
            $result =  $this->where($condition)->delete();
        } elseif ($type == 'cookie') {
            $cart_str = get_magic_quotes_gpc() ? stripslashes(cookie('cart')) : cookie('cart');
            $cart_str = base64_decode(decrypt($cart_str));
            $cart_array = @unserialize($cart_str);
            if (key_exists($condition['goods_id'],(array)$cart_array)) {
                unset($cart_array[$condition['goods_id']]);
            }
            setNcCookie('cart',encrypt(base64_encode(serialize($cart_array))),24*3600);
            $result = true;
        }
        //重新计算购物车商品数和总金额
        if ($result) {
            $this->getCartNum($type,array('buyer_id'=>$condition['buyer_id']));
        }
        return $result;
    }

    /**
     * 清空购物车
     *
     * @param string $type 存储类型 db,cookie
     * @param unknown_type $condition
     */
    public function clearCart($type, $condition = array()) {
        if ($type == 'cookie') {
            setNcCookie('cart','',-3600);
        } else if ($type == 'db') {
            //数据库暂无浅清空操作
        }
    }

    /**
     * 计算购物车总商品数和总金额
     * @param string $type 购物车信息保存类型 db,cookie
     * @param array $condition 只有登录后操作购物车表时才会用到该参数
     */
    public function getCartNum($type, $condition = array()) {
        if ($type == 'db') {
            $cart_all_price = 0;
            $cart_goods = $this->listCart('db',$condition);
            $this->cart_goods_num = count($cart_goods);
            if(!empty($cart_goods) && is_array($cart_goods)) {
                foreach ($cart_goods as $val) {
                    $cart_all_price += $val['goods_price'] * $val['goods_num'];
                }
            }
          $this->cart_all_price = ncPriceFormat($cart_all_price);
        } elseif ($type == 'cookie') {
            $cart_str = get_magic_quotes_gpc() ? stripslashes(cookie('cart')) : cookie('cart');
            $cart_str = base64_decode(decrypt($cart_str));
            $cart_array = @unserialize($cart_str);
            $cart_array = !is_array($cart_array) ? array() : $cart_array;
            $this->cart_goods_num = count($cart_array);
            $cart_all_price = 0;
            foreach ($cart_array as $v){
                $cart_all_price += floatval($v['goods_price'])*intval($v['goods_num']);
            }
            $this->cart_all_price = $cart_all_price;
        }
        @setNcCookie('cart_goods_num',$this->cart_goods_num,2*3600);
        return $this->cart_goods_num;
    }

    /**
     * 登录之后,把登录前购物车内的商品加到购物车表
     *
     */
    public function mergecart($member_info = array(), $store_id = null){
        if (!$member_info['member_id']) return;
        // $save_type = C('cache.type') != 'file' ? 'cache' : 'cookie';
        $save_type = 'cookie';
        $cart_new_list = $this->listCart($save_type);
        if (empty($cart_new_list)) return;
        //批量添加购物车
        $this->batchAddCart($cart_new_list, $member_info['member_id'], $store_id);
        //最后清空登录前购物车内容
        $this->clearCart($save_type);
    }
    /**
     * 批量新增购物车
     * @param array $cart_new_list 例如 array('1000010'=>array('goods_num'=>1));
     */
    public function batchAddCart($cart_new_list, $member_id, $store_id=0){
        if (!($cart_new_list && $member_id)) {
            return false;
        }
        //查询在购物车中,不是店铺自己的商品，未禁售，上架，有库存的商品,并加入DB购物车
        $model_goods = Model('goods');
        $where = array();
        if ($store_id) {
            $where['store_id'] = array('neq',$store_id);
        }
        $where['goods_id'] = array('in',array_keys($cart_new_list));
        $goods_list = $model_goods->getGoodsOnlineList($where);
        if (!empty($goods_list)){
            foreach ($goods_list as $goods_info){
                $goods_info['buyer_id'] = $member_id;
                $this->addCart($goods_info,'db',$cart_new_list[$goods_info['goods_id']]['goods_num']);
            }
        }
    }
}
