<?php

namespace internship\model;

use n2n\context\attribute\RequestScoped;
use n2n\persistence\orm\EntityManager;
use internship\bo\Category;

#[RequestScoped]
class CategoryDao {
	private EntityManager $em;

	private function _init(EntityManager $em): void {
		$this->em = $em;
	}

	/**
	 * Gebe alle {@see Category}-Objekte, nach id absteigend sortiert, zurück.
	 *
	 * @return Category[]
	 */
	function getCategories(): array {
		$criteria = $this->em->createSimpleCriteria(Category::getClass(), array(), array('id' => 'DESC'));
		return $criteria->toQuery()->fetchArray();
	}


	/**
	 * Gebe den {@see Category} mit der enstprechenden ID zurück.
	 */
	function getCategoryById(int $id): ?Category {
		return $this->em->find(Category::getClass(), $id);
	}


	function saveCategory(Category $newCategory): void {
		$this->em->persist($newCategory);
	}

	function removeCategory(int $articleId): void {
		$category = $this->getCategoryById($articleId);
		$this->em->remove($category);
	}
}