/// <summary>
/// Retrieves all instances of ProductCategory that are leaves.
/// </summary>
/// <returns>GetAllProductCategoriesModelView with data regarding all of the leaf ProductCategory.</returns>
/// <exception cref="ResourceNotFoundException">Throw when no leaf ProductCategory is found.</exception>
public GetAllProductCategoriesModelView findLeaves()
{
IEnumerable <ProductCategory> leaves = PersistenceContext.repositories().createProductCategoryRepository().findLeaves();
if (!leaves.Any())
{
throw new ResourceNotFoundException(ERROR_NO_CATEGORIES_FOUND);
}
return(ProductCategoryModelViewService.fromCollection(leaves));
}
/// <summary>
/// Retrieves all instances of ProductCategory that are currently present within the repository.
/// </summary>
/// <returns>Returns a list with ModelViews of all the instances of ProductCategory in the repository. </returns>
public GetAllProductCategoriesModelView findAllCategories()
{
IEnumerable <ProductCategory> categories = PersistenceContext.repositories().createProductCategoryRepository().findAll();
//check if any categories have been added
if (!categories.Any())
{
throw new ArgumentException(ERROR_NO_CATEGORIES_FOUND);
}
return(ProductCategoryModelViewService.fromCollection(categories));
}
/// <summary>
/// Retrieves all instances of ProductCategory that are subcategories of the ProductCategory with the given identifier.
/// </summary>
/// <param name="parentId">Parent ProductCategory's database identifier.</param>
/// <returns>Returns a list with ModelViews of all the instances of ProductCategory that are subcategories of the given ProductCategory.</returns>
public GetAllProductCategoriesModelView findAllSubCategories(long parentId)
{
ProductCategoryRepository repository = PersistenceContext.repositories().createProductCategoryRepository();
ProductCategory parentCategory = repository.find(parentId);
if (parentCategory == null)
{
throw new ArgumentException(ERROR_PARENT_NOT_FOUND);
}
IEnumerable <ProductCategory> subCategories = repository.findSubCategories(parentCategory);
//check if any categories have been added
if (!subCategories.Any())
{
throw new ArgumentException(ERROR_NO_CATEGORIES_FOUND);
}
return(ProductCategoryModelViewService.fromCollection(subCategories));
}
