/// <summary>
/// Deletes a category.
/// </summary>
/// <param name="categoryDel">Category to delete</param>
public void Delete(CategoryDTO categoryDel)
{
// Throws an exception for a null dto
if (categoryDel == null)
throw new ArgumentNullException("categoryDel",
"categoryDel does not accept a null dto as an argument.");
using (var context = new openTillEntities())
{
var category = context.Categories.SingleOrDefault(c => c.Id == categoryDel.Id);
// Throws an exception if no matching entry is found
if (category == null)
throw new InvalidOperationException("No entry matching the given category was found.");
context.Categories.Remove(category);
context.SaveChanges();
}
}
/// <summary>
/// Method calls on repository to update an exisiting field in the database.
/// </summary>
/// <param name="categoryToUpdate">Category that is to be updated.</param>
public void Update(CategoryDTO categoryToUpdate)
{
_categoryRepository.Update(categoryToUpdate);
}
/// <summary>
/// Method calls on repository to insert a new category field into the database.
/// </summary>
/// <param name="categoryToInsert">Category Data Transfer Object to insert into the database.</param>
public void Insert(CategoryDTO categoryToInsert)
{
_categoryRepository.Insert(categoryToInsert);
}
/// <summary>
/// Method calls on repository to remove a Category field from the database.
/// </summary>
/// <param name="categoryToDelete">Category that is to be removed from the database.</param>
public void Delete(CategoryDTO categoryToDelete)
{
_categoryRepository.Delete(categoryToDelete);
}
public ObservableCategory(CategoryDTO dto)
{
this.Id = dto.Id;
this.Name = dto.Name;
this.Description = dto.Description;
}
/// <summary>
/// Submits a new category for persistence.
/// </summary>
/// <param name="newCategory">New category to save</param>
public void Insert(CategoryDTO newCategory)
{
// Throws an exception for a null dto
if (newCategory == null)
throw new ArgumentNullException("newCategory",
"newCategory does not accept a null dto as an argument.");
using (var context = new openTillEntities())
{
// Throws an exception if a category with the given name already exists
if (context.Categories.SingleOrDefault(c => c.Name == newCategory.Name) != null)
throw new InvalidOperationException("A category with the given name already.");
context.Categories.Add(Mapper.Map<Category>(newCategory));
context.SaveChanges();
}
}
/// <summary>
/// Updates an existing category.
/// </summary>
/// <param name="categoryUpdate">Category to update</param>
public void Update(CategoryDTO categoryUpdate)
{
// Throws an exception for a null dto
if (categoryUpdate == null)
throw new ArgumentNullException("categoryUpdate",
"categoryUpdate does not accept a null dto as an argument.");
using (var context = new openTillEntities())
{
var category = context.Categories.SingleOrDefault(c => c.Id == categoryUpdate.Id);
// Throws an exception if the given category doesn't exist
if (category == null)
throw new InvalidOperationException("No entry matching the given category was found.");
// Throws an exception if a category with the given name already exists
if (context.Categories.SingleOrDefault(c => c.Name == categoryUpdate.Name) != null)
throw new InvalidOperationException("A category with the given name already.");
// Update existing category
category.Name = categoryUpdate.Name;
category.Description = category.Description;
context.SaveChanges();
}
}
