book_admin/application/main/service/SpecialPayService.php

<?php
/**
 * Created by: PhpStorm
 * User: lytian
 * Date: 2019/9/19
 * Time: 17:47
 */

namespace app\main\service;


use app\common\model\SpecialRechargeUrl;

class SpecialPayService extends BaseService
{

    /**
     * 定义属性
     *
     * @var SpecialPayService
     */
    protected static $self = null;

    /**
     * 返回实例
     *
     * @return SpecialPayService
     */
    public static function instance()
    {
        if (self::$self == null) {
            self::$self = new self();
        }

        return self::$self;
    }

    /**
     * @return SpecialRechargeUrl
     */
    public function getUrlModel()
    {
        return model("SpecialRechargeUrl");
    }

    /**
     * 我能下单吗
     * @param $id
     * @param $user_id
     * @return array
     * @throws \think\exception\DbException
     */
    public function canPay($id, $user_id)
    {
        $result = ['code' => 200, 'msg' => ''];
        $row = $this->getUrlModel()->get($id);

        if ($row['status'] == 'hidden') {
            $result['code'] = 201;
            $result['msg'] = '链接不存在';
        } else {
            if ($row['order_status'] == '1') {
                $result['code'] = 202;
                $result['msg'] = '链接已支付';
            } else {
                if ($row['user_id']) {
                    if ($row['user_id'] != $user_id) {
                        $result['code'] = 202;
                        $result['msg'] = '该链接为专属福利链接，请您联系私人助理获取';
                    }
                }
            }
        }

        return $result;
    }

    /**
     * 更新
     * @param $id
     * @param $params
     * @return false|int
     * @throws \think\exception\DbException
     */
    public function updateUrl($id, $params)
    {
        $row = $this->getUrlModel()->get($id);
        return $row->save($params);
    }
}