<?php
    
    namespace frontend\controllers;
    
    use common\models\Blog;
    use common\models\BlogCategory;
    use yii\data\ActiveDataProvider;
    use yii\helpers\VarDumper;
    use yii\web\Controller;
    use yii\web\NotFoundHttpException;

    /**
     * Blog controller
     */
    class BlogController extends Controller
    {
        
        /**
         * Displays blog list.
         * @return string
         */
        public function actionIndex()
        {
            $query = Blog::find();
            $dataProvider = new ActiveDataProvider([
                'query' => $query,
                'pagination' => [
                    'pageSize' => 4
                    ,
                ],
                'sort' => [
                    'defaultOrder' => [
                        'date' => SORT_DESC,
                    ]
                ],
            ]);

            return $this->render('index', [
                'dataProvider' => $dataProvider,
            ]);
        }
        
        /**
         * Display one blog page.
         * @return string
         */
        public function actionView($id)
        {
            $model = $this->findModel($id);
            $categories = $model->categories;
            return $this->render('view', [
                'model' => $model,
            ]);
        }
        
        public function actionCategory($id)
        {
            $model = BlogCategory::findOne($id);
            $query = $model->getBlogs();
            $dataProvider = new ActiveDataProvider([
                'query' => $query,
                'pagination' => [
                    'pageSize' => 4
                    ,
                ],
                'sort' => [
                    'defaultOrder' => [
                        'date' => SORT_DESC,
                    ]
                ],
            ]);
            return $this->render('category', [
                'model' => $model,
                'dataProvider' => $dataProvider,
            ]);
        }
        
        private function findModel($id) {
            $model = Blog::findOne($id);
            if(!empty($model)) {
                return $model;
            } else {
                throw new NotFoundHttpException();
            }
        }
    }