zxcms/backend/controllers/SiteController.php

<?php
namespace backend\controllers;

use core\entities\Search;
use core\forms\SearchForm;
use Yii;
use yii\data\ActiveDataProvider;
use yii\web\Controller;
use yii\filters\VerbFilter;
use yii\filters\AccessControl;
use common\models\LoginForm;

/**
 * Site controller
 */
class SiteController extends Controller
{
    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::class,
                'rules' => [
                    [
                        'actions' => ['error'],
                        'allow' => true,
                    ],
                    [
                        'actions' => ['index', 'search'],
                        'allow' => true,
                        'roles' => ['Dashboard'],
                    ],
	                [    // all the action are accessible to admin
		                'allow' => true,
		                'roles' => ['admin'],
	                ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::class,
                'actions' => [
                    'logout' => ['post'],
                ],
            ],
        ];
    }

    /**
     * @inheritdoc
     */
    public function actions()
    {
        return [
            'error' => [
                'class' => 'yii\web\ErrorAction',
            ],
        ];
    }

    /**
     * Displays homepage.
     *
     * @return string
     */
    public function actionIndex()
    {
        return $this->render('index');
    }

    public function actionSearch()
    {
		$form = new SearchForm();

	    if ($form->load(Yii::$app->request->post()) && $form->validate()) {
		    try {
			    $query = Search::find()
			                   ->andWhere(['LIKE', 'title', $form->query])
			                   ->orWhere(['LIKE', 'content', $form->query]);

			    $provider = new ActiveDataProvider([
				    'query' => $query,
				    'pagination' => [
					    'pageSize' => 10,
				    ],
				    'sort' => [],
			    ]);

			    return $this->render('search', [
			    	'provider' => $provider,
				    'form' => $form
			    ]);

			    //$page = $this->service->create($form);
			    //return $this->redirect(['view', 'id' => $page->id]);
		    } catch (\DomainException $e) {
			    //Yii::$app->errorHandler->logException($e);
			    //Yii::$app->session->setFlash('error', $e->getMessage());
		    }
	    }
    }

	public function beforeAction($action)
	{
		if ($action->id === 'error') {
			$this->layout = 'error';
		}
		return parent::beforeAction($action);
	}
}