/// <summary>
/// Is responsible for handling any modifications to category items
/// </summary>
/// <param name="category">Edited category</param>
/// <returns>Boolean indicating whether the modification took effect</returns>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="InvalidOperationException"></exception>
public Boolean edit(category category)
{
CategoryIM im = new CategoryIM(db);
category dbVersion = im.find(category.id);
if (dbVersion.version == category.version)
{
((IObjectContextAdapter)db).ObjectContext.Detach(dbVersion);
db.Entry(category).State = EntityState.Modified;
category.version = category.version + 1;
db.SaveChanges();
return true;
}
return false;
}
/**
* Filters the categories and only returns those that are not already assigned to the menu
* that is passed in.
* */
public static IList<category> filterListByMenu(menu menu,touch_for_foodEntities db)
{
List<category> filteredList = new List<category>();
MenuCategoryIM im = new MenuCategoryIM(db);
CategoryIM cim = new CategoryIM(db);
int resto_id = menu.resto_id;
bool reject = false;
foreach (category cat in cim.find().ToList())
{
reject = false;
//First check that the category does belong to the restaurant
//Find all usages of the category in question in the current restaurant
List<menu_category> usages = db.menu_category.Where(mc => mc.category_id == cat.id && mc.menu.resto_id == resto_id).ToList();
//If it was never used by this restaurant, then the restaurant could not have created it
// because create automatically adds the created item to the menu
if (usages.Count == 0)
{
reject = true;
}
//Check if the category is being used buy the current menu
foreach (menu_category menu_cat in im.find(false, menu.id))
{
if (cat.id == menu_cat.category_id)
{
reject = true;
break;
}
}
if (!reject)
{
filteredList.Add(cat);
}
}
return filteredList;
}
public CategoryController()
{
im = new CategoryIM(db);
om = new CategoryOM(db);
}