screen/application/common/model/Coupon.php

<?php

namespace app\common\model;

use think\Model;


class Coupon extends Model
{
    protected $autoWriteTimestamp=true;
    protected $updateTime=null;
    public static $types=[
        self::T_FULL=>'满减券',
        self::T_WU=>'抵用券'
    ];
    const T_FULL=1;
    const T_WU=2;

    /**
     * @return string[]
     */
    public static function getTypes(): array
    {
        return self::$types;
    }
    public function bindGoods(){
        return $this->hasMany(CouponGoods::class);
    }
    public function goods(){
        return $this->belongsToMany(Goods::class,CouponGoods::class,'goods_id','coupon_id');
    }

    protected static function init()
    {
        self::beforeWrite(function (self $coupon){
            if($coupon['type']==2){
                //unset($coupon['amount_full']);
            }
        });
    }

    public function sendToUser($users,$num){
        $users=array_unique($users);
        $users=array_filter($users);
        $this['num_send']=$this['num_send']+$num*count($users);
        if($this['num_send']>$this['num']){
            throw_user("[{$this['id']}]券数量不足");
        }
        $this->save();
        foreach ($users as $userId){
            $user=User::find($userId);
            if($user){
                for ($i=0;$i<$num;$i++) {
                    UserCoupon::toUser($user, $this);
                }
                SiteMsg::sendMsg(SiteMsg::TYPE_COUPON,$user);
            }
        }

    }
}