<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class ShoppingCartItem extends Model
{
    /**
     * @var array
     */
    protected $casts = [
        'quantity' => 'int',
        'specs' => 'json',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'user_id',
        'sku_id',
        'name',
        'cover',
        'sell_price',
        'vip_price',
        'specs',
        'quantity',
    ];

    /**
     * 此购物车物品所属的商品
     */
    public function sku()
    {
        return $this->belongsTo(ProductSku::class);
    }

    /**
     * 获取商品售价
     *
     * @return string
     */
    public function getSellPriceFormatAttribute()
    {
        return bcdiv($this->attributes['sell_price'], 100, 2);
    }

    /**
     * 获取商品会员价
     *
     * @return string
     */
    public function getVipPriceFormatAttribute()
    {
        if (is_null($price = $this->attributes['vip_price'])) {
            return '';
        }

        return bcdiv($price, 100, 2);
    }
}