public function actionIndex($category_id = null)
{
if (is_null($category_id)) {
$category = new Home();
} else {
$category = Category::findOne($category_id);
}
if ($category->category_id != 0 && is_null($category)) {
throw new \yii\web\HttpException(404, Yii::t('burivuh', 'The category does not exist'));
}
$categories = Category::find()->where(['parent_id' => $category->category_id])->orderBy('title')->all();
$documents = Document::find()->where(['category_id' => $category->category_id])->orderBy('title')->all();
$readme = Document::find()->where(['title' => $category->title, 'category_id' => $category->category_id])->one();
return $this->render('index', ['category' => $category, 'categories' => $categories, 'documents' => $documents, 'readme' => $readme]);
}
