<?php
namespace app\admin\controller;

use think\Controller;
use think\Db;

/**
 * 系统登录控制器
 * Class Login
 * @package app\admin\controller
 * @author Anyon <zoujingli@qq.com>
 * @date 2017/02/10 13:59
 */
class Login extends Controller {

    /**
     * 用户登录
     * @return \think\response\View
     */
    public function index() {
        if ($this->request->isGet()) {
            return view();
        }
        $username = $this->request->post('username', '', 'trim');
        $password = $this->request->post('password', '', 'trim');
        (empty($username) || strlen($username) < 4) && $this->error('登录账号长度不能少于4位有效字符!');
        (empty($password) || strlen($password) < 4) && $this->error('登录密码长度不能少于4位有效字符!');
        $user = Db::name('SystemUser')->where('username', $username)->find();
        empty($user) && $this->error('登录账号不存在，请重新输入!');
        ($user['password'] !== md5($password)) && $this->error('登录密码与账号不匹配，请重新输入!');
        session('user', $user);
        $this->error('登录成功，正在进入系统...');
    }

    /**
     * 退出登录
     */
    public function out() {
        session('user', null);
        $this->success('退出登录成功！', '@admin/login');
    }
}