<?php

namespace backend\controllers;

use common\models\Nav;
use common\models\NavItem;
use Yii;
use yii\data\ActiveDataProvider;
use yii\filters\VerbFilter;
use yii\web\Controller;
use yii\web\NotFoundHttpException;

/**
 * NavController implements the CRUD actions for Nav model.
 */
class NavController extends Controller
{
    public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'delete' => ['post']
                ],
            ],
        ];
    }

    /**
     * Lists all Nav models.
     * @return mixed
     */
    public function actionIndex()
    {
        $dataProvider = new ActiveDataProvider([
            'query' => Nav::find()
        ]);
        return $this->render('index', [
            'dataProvider' => $dataProvider,
        ]);
    }


    /**
     * Creates a new Nav model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new Nav();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['update', 'id' => $model->id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

    /**
     * Updates an existing Nav model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id
     * @return mixed
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        $navItemsProvider = new ActiveDataProvider([
            'query' => NavItem::find()->where(['nav_id'=>$model->id])->orderBy('order')
        ]);

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['index']);
        } else {
            return $this->render('update', [
                'model' => $model,
                'navItemsProvider'=>$navItemsProvider
            ]);
        }
    }

    /**
     * Deletes an existing Nav model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     * @param integer $id
     * @return mixed
     */
    public function actionDelete($id)
    {
        $this->findModel($id)->delete();

        return $this->redirect(['index']);
    }

    /**
     * Finds the Nav model based on its primary key value.
     * If the model is not found, a 404 HTTP exception will be thrown.
     * @param integer $id
     * @return Nav the loaded model
     * @throws NotFoundHttpException if the model cannot be found
     */
    protected function findModel($id)
    {
        if (($model = Nav::findOne($id)) !== null) {
            return $model;
        } else {
            throw new NotFoundHttpException('The requested page does not exist.');
        }
    }
}