/**
* Deletes the given category. All articles are moved to the standard category.
* @param ArticleRepository $articleRepo Repo for moving the articles.
* @param Category $category The category that must be deleted.
* @throws NotFoundException If this category doesn't exist in the database.
* @throws PDOException If a database error occurs.
* @throws InvalidArgumentException If the category is a standard category.
*/
public function deleteCategory(ArticleRepository $articleRepo, Category $category)
{
if ($category->isStandardCategory()) {
throw new InvalidArgumentException("cannot delete standard category");
}
$articleRepo->changeCategories($category->getId(), 1);
$this->where($this->idField, '=', $category->getId())->deleteOneOrFail();
}
