backend/controllers/BrandsController.php

<?php
namespace backend\controllers;
use Yii;
use common\models\Brands;
use common\models\BrandsSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
use yii\filters\AccessControl;
use yii\web\UploadedFile;
/**
 * BrandsController implements the CRUD actions for Brands model.
 */
class BrandsController extends Controller
{
    public $layout = "/column";
    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::className(),
                'rules' => [
                    [
                        'actions' => ['login', 'error', 'download-photo', 'delete-image'],
                        'allow' => true,
                    ],
                    [
                        'actions' => ['logout', 'index', 'create', 'update', 'view', 'delete',],
                        'allow' => true,
                        'roles' => ['@'],
                    ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'logout' => ['post'],
                ],
            ],
        ];
    }
    /**
     * Lists all Brands models.
     * @return mixed
     */
    public function actionIndex()
    {
        $searchModel = new BrandsSearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
        return $this->render('index', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }
    /**
     * Displays a single Brands model.
     * @param string $id
     * @return mixed
     */
    public function actionView($id)
    {
        return $this->render('view', [
            'model' => $this->findModel($id),
        ]);
    }
    /**
     * Creates a new Brands model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new Brands();
        if ($model->load(Yii::$app->request->post())) {
            return $this->saveModelWithImg($model);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }
    /**
     * Updates an existing Brands model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param string $id
     * @return mixed
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);
        if ($model->load(Yii::$app->request->post())) {
            if ($model->delete_img) {
                // удаляем изображение (как из базы так и с сервера), сохраняем модель
                return $this->saveModelWithDeleteImg($model);
            } else {
                // сохраняем модель с сохранением изображения (как в базу так и на сервер)
                return $this->saveModelWithImg($model);
            }
        } else {
            return $this->render('update', [
                'model' => $model,
            ]);
        }
    }
    /**
     * Deletes an existing Brands model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     * @param string $id
     * @return mixed
     */
    public function actionDelete($id)
    {
        $this->findModel($id)->delete();
        return $this->redirect(['index']);
    }
    /**
     * Finds the Brands model based on its primary key value.
     * If the model is not found, a 404 HTTP exception will be thrown.
     * @param string $id
     * @return Brands the loaded model
     * @throws NotFoundHttpException if the model cannot be found
     */
    protected function findModel($id)
    {
        if (($model = Brands::findOne($id)) !== null) {
            return $model;
        } else {
            throw new NotFoundHttpException('The requested page does not exist.');
        }
    }
    /**
     * @param $model
     * @return string|\yii\web\Response
     * сохраняет картинку и валидирует модель
     * выбрасывает исключение в случае ошибки
     */
    protected function saveModelWithImg($model)
    {
        $model->file = UploadedFile::getInstance($model, 'file');
        $model->IMG = $model->file->name;
        // первый проход - валидируем, сохраняем файл,
        if ($model->validate()) {
            // сохраним файл
            $model->file->saveAs(Yii::getAlias('@storage') . '/files/brands/' . $model->IMG);
            if ($model->save()) {
                return $this->redirect(['index']);
            }
        }
        $model->throwStringErrorException();
    }
    /**
     * @param $model
     * @return \yii\web\Response
     * сохраняет модель с удалением картинки
     * выбрасывает исключение в случае ошибки
     */
    protected function saveModelWithDeleteImg($model)
    {
        if ($model->validate()) {
            $img_path = Yii::getAlias('@storage') . '/files/brands/' . $model->IMG;
            // удалим файл
            if(file_exists( $img_path ))
                unlink( $img_path );
            $model->IMG = '';
            if ($model->save()) {
                return $this->redirect(['index']);
            }
        }
        $model->throwStringErrorException();
    }
}