<?php

namespace App\Http\Controllers\Admin;

use Illuminate\Support\Facades\DB;

class BaseController extends CommonController
{
    public function __construct()
    {
        //判断是否登录
        if (isset($_SESSION['admin_info'])) {
            $this->admin_info = $_SESSION['admin_info'];
        } else {
            header("Location:" . route('page404'));
            exit();
        }

        //判断是否拥有权限
        if ($_SESSION['admin_info']['role_id'] <> 1) {
            $uncheck = array('admin_jump', 'admin', 'admin_index_upconfig', 'admin_index_upcache', 'admin_welcome');

            if (in_array(\Route::currentRouteName(), $uncheck)) {

            } else {
                $menu_id = DB::table('menu')->where('action', \Route::currentRouteName())->value('id');
                $check = DB::table('access')->where(['role_id' => $_SESSION['admin_info']['role_id'], 'menu_id' => $menu_id])->first();

                if (!$check) {
                    error_jump('你没有权限访问，请联系管理员', route('admin'));
                }
            }
        }
        parent::__construct();
    }

    /**
     * 获取分页数据及分页导航
     * @param string $modelname 模块名与数据库表名对应
     * @param array $where 查询条件
     * @param string $orderby 查询排序
     * @param string $field 要返回数据的字段
     * @param int $listRows 每页数量，默认30条
     *
     * @return 格式化后输出的数据。内容格式为：
     *     - "code"                 (string)：代码
     *     - "info"                 (string)：信息提示
     *
     *     - "result" array
     *
     *     - "img_list"             (array) ：图片队列，默认8张
     *     - "img_title"            (string)：车图名称
     *     - "img_url"              (string)：车图片url地址
     *     - "car_name"             (string)：车名称
     */
    public function pageList($modelname, $where = '', $orderby = '', $field = '*', $listRows = 30)
    {
        $model = \DB::table($modelname);

        //查询条件
        if (!empty($where)) {
            $model = $model->where($where);
        }

        //排序
        if ($orderby != '') {
            if ($orderby == 'rand()') {
                $model = $model->orderBy(\DB::raw('rand()'));
            } else {
                if (count($orderby) == count($orderby, 1)) {
                    $model = $model->orderBy($orderby[0], $orderby[1]);
                } else {
                    foreach ($orderby as $row) {
                        $model = $model->orderBy($row[0], $row[1]);
                    }
                }
            }
        } else {
            $model = $model->orderBy('id', 'desc');
        }

        //要返回的字段
        if ($field != '*') {
            $model = $model->select(\DB::raw($field));
        }

        return $model->paginate($listRows);
    }

}