mtb_dcatadmin_plus/app/Admin/Controllers/AuthController.php

<?php

namespace App\Admin\Controllers;

use App\Models\DistAdminDistributor;
use Dcat\Admin\Admin;
use Dcat\Admin\Form;
use Dcat\Admin\Http\Controllers\AuthController as BaseAuthController;
use Dcat\Admin\Http\Repositories\Administrator;
use Dcat\Admin\Layout\Content;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;
use Illuminate\Support\Facades\Validator;

class AuthController extends BaseAuthController
{
    protected $view = 'admin.pages.login';

    /**
     * Login interface.重写登录接口
     * @param Request $request
     * @return
     */
    public function postLogin(Request $request)
    {

        $credentials = $request->only([$this->username(), 'password', 'captcha']);
        //去除前后空格
        foreach (['username', 'password', 'captcha'] as $key) {
            if (isset($credentials[$key])) {
                $credentials[$key] = trim($credentials[$key]);
            }
        }

        $remember = (bool)$request->input('remember', false);

        /** @var \Illuminate\Validation\Validator $validator */
        $validator = Validator::make($credentials, [
            $this->username() => 'required',
            'password' => 'required',
            'captcha' => 'required',
        ]);


        if (trim($request->input('captcha')) != Session::get('captcha'))
        {
            $session_captcha = Session::get('captcha');

            //Session::forget('captcha');
            return response()->json([
                'success' => false,
                'message' => 'The captcha['.$session_captcha.'] is incorrect. Please refresh the page and try again.',
                'refresh_captcha' => true, // 通知前端刷新验证码
            ], 422);; // 422 表示 Unprocessable Entity
        }
        else
        {
            //Session::forget('captcha');
        }


        unset($credentials['captcha']);

        if ($validator->fails()) {
            return $this->validationErrorsResponse($validator);
        }

        if ($this->guard()->attempt($credentials, $remember)) {

            // 登录成功后返回登录响应
            return $this->sendLoginResponse($request);
        }

        return $this->validationErrorsResponse([
            $this->username() => $this->getFailedLoginMessage(),
        ]);
    }

    /**
     * 重写登录控制器
     * @param Content $content
     * @return Content
     */
    function getLogin(Content $content)
    {
        $lang = request()->query('lang');

        if(!empty($lang))
        {
            switchLanguage($lang);
            return response()->json(['success' => true, 'lang' => $lang]);
        }

        if ($this->guard()->check()) {
            return redirect($this->getRedirectPath());
        }

        return $content->full()->body(view($this->view));
    }

    /**
     * Model-form for user setting.
     *
     * @return Form
     */
    protected function settingForm()
    {

        return new Form(new Administrator(), function (Form $form) {
            $form->action(admin_url('auth/setting'));
            $form->disableCreatingCheck();
            $form->disableEditingCheck();
            $form->disableViewCheck();

            $form->tools(function (Form\Tools $tools) {
                $tools->disableView();
                $tools->disableDelete();
            });

            $form->display('username', trans('admin.username'));
            $form->text('name', trans('admin.name'))->required();

            $form->password('old_password', trans('admin.old_password'));

            $form->password('password', trans('admin.password'))
                ->minLength(5)
                ->maxLength(20)
                ->customFormat(function ($v) {
                    if ($v == $this->password) {
                        return;
                    }

                    return $v;
                });
            $form->password('password_confirmation', trans('admin.password_confirmation'))->same('password');

            $form->ignore(['password_confirmation', 'old_password']);

            // 添加语言选择的下拉框
//            $form->select('language', trans('admin.language'))
//                ->options(config('dictionary.languages'))
//                ->default('en')
//                ->required();;  // 设置默认语言

            $form->saving(function (Form $form) {
                if ($form->password && $form->model()->password != $form->password) {
                    $form->password = bcrypt($form->password);
                }

                if (! $form->password) {
                    $form->deleteInput('password');
                }
            });

            $form->saved(function (Form $form) {
                return $form
                    ->response()
                    ->success(trans('admin.update_succeeded'))
                    //->redirect('/');
                    ->script('setTimeout(() => {location.reload();}, 1000);');//保存成功后刷新页面
            });

        });
    }



}