dlzx/app/models/store/StoreExchange.php

<?php
/**
 *
 * @author: xaboy<365615158@qq.com>
 * @day: 2017/12/18
 */

namespace app\models\store;

use app\admin\model\ump\StoreSeckillTime;
use crmeb\basic\BaseModel;
use crmeb\services\GroupDataService;
use app\admin\model\store\StoreProductAttrValue;
use app\models\store\StoreProduct;

/**
 * TODO 秒杀产品Model
 * Class StoreSeckill
 * @package app\models\store
 */
class StoreExchange extends BaseModel
{
    /**
     * 数据表主键
     * @var string
     */
    protected $pk = 'id';

    /**
     * 模型名称
     * @var string
     */
    protected $name = 'store_exchange';

    protected function getImagesAttr($value)
    {
        return json_decode($value, true) ?: [];
    }

    public function getDescriptionAttr($value)
    {
        return htmlspecialchars_decode($value);
    }


    /**
     * 获取兑换列表
     * @param $time
     * @param int $page
     * @param int $limit
     * @return array
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public static function exchangeList($money_type, $page = 0, $limit = 20)
    {
        if ($page) $list = self::alias('n')->where('n.money_type', $money_type)->join('store_product c', 'c.id=n.product_id')->where('c.is_show', 1)->where('c.is_del', 0)->where('n.is_del', 0)->where('n.status', 1)->field('n.*')->order('n.sort desc')->page($page, $limit)->select();
        else $list = self::alias('n')->where('n.money_type', $money_type)->join('store_product c', 'c.id=n.product_id')->where('c.is_show', 1)->where('c.is_del', 0)->where('n.is_del', 0)->where('n.status', 1)->field('n.*')->order('sort desc')->select();
        if ($list) return $list->hidden(['cost', 'add_time', 'is_del'])->toArray();
        return [];
    }

    /**
     * 获取所有兑换产品
     * @param string $field
     * @return array
     */
    public static function getListAll($offset = 0, $limit = 10, $field = 'id,product_id,image,title,price,ot_price,stock,sales,money_type,money')
    {
        $time = time();
        $model = self::where('is_del', 0)->where('status', 1)->where('stock', '>', 0)->field($field)
            ->order('sort DESC,add_time DESC');
        $model = $model->limit($offset, $limit);
        $list = $model->select();
        if ($list) return $list->toArray();
        else return [];
    }

    /**
     * 获取热门推荐的兑换产品
     * @param int $limit
     * @param string $field
     * @return array
     */
    public static function getHotList($limit = 0, $field = 'id,product_id,image,title,price,ot_price,stock,sales,money_type,money')
    {
        $time = time();
        $model = self::where('is_hot', 1)->where('is_del', 0)->where('status', 1)->where('stock', '>', 0)->field($field)
            ->order('sort DESC,add_time DESC');
        if ($limit) $model->limit($limit);
        $list = $model->select();
        if ($list) return $list->toArray();
        else return [];
    }

    /**
     * 获取一条秒杀产品
     * @param $id
     * @param string $field
     * @return array|false|\PDOStatement|string|\think\Model
     */
    public static function getValidProduct($id, $field = '*')
    {
        $info = self::alias('n')->join('store_product c', 'c.id=n.product_id')->where('n.id', $id)->where('c.is_show', 1)->where('c.is_del', 0)->where('n.is_del', 0)->where('n.status', 1)->field('n.*,SUM(c.sales+c.ficti) as total')->find();
        if ($info['id']) {
            return $info;
        } else {
            return [];
        }
    }


    /** 获取秒杀产品库存
     * @param $id
     * @return mixed
     */
    public static function getProductStock($id)
    {
        return self::where('id', $id)->value('stock');
    }

    /**
     * 获取字段值
     * @param $id
     * @param string $field
     * @return mixed
     */
    public static function getProductField($id, $field = 'title')
    {
        return self::where('id', $id)->value($field);
    }

    /**
     * 修改秒杀库存
     * @param int $num
     * @param int $seckillId
     * @return bool
     */
    public static function decExchangeStock($num = 0, $seckillId = 0, $unique = '')
    {
        $product_id = self::where('id', $seckillId)->value('product_id');
        if ($unique) {
            $res = false !== StoreProductAttrValue::decProductAttrStock($seckillId, $unique, $num, 4);
            $res = $res && self::where('id', $seckillId)->dec('stock', $num)->inc('sales', $num)->update();
            $sku = StoreProductAttrValue::where('product_id', $seckillId)->where('unique', $unique)->where('type', 4)->value('suk');
            $res = $res && StoreProductAttrValue::where('product_id', $product_id)->where('suk', $sku)->where('type', 0)->dec('stock', $num)->inc('sales', $num)->update();
        } else {
            $res = false !== self::where('id', $seckillId)->dec('stock', $num)->inc('sales', $num)->update();
        }
        $res = $res && StoreProduct::where('id', $product_id)->dec('stock', $num)->inc('sales', $num)->update();
        return $res;
    }

    /**
     * 增加库存较少销量
     * @param int $num
     * @param int $seckillId
     * @return bool
     */
    public static function incExchangeStock($num = 0, $seckillId = 0)
    {
        $seckill = self::where('id', $seckillId)->field(['stock', 'sales'])->find();
        if (!$seckill) return true;
        if ($seckill->sales > 0) $seckill->sales = bcsub($seckill->sales, $num, 0);
        if ($seckill->sales < 0) $seckill->sales = 0;
        $seckill->stock = bcadd($seckill->stock, $num, 0);
        return $seckill->save();
    }
}