public void UpdateCategory(Category category, CategoryList list, string oldname = null)
{
// update record in database
string tableName = GetDBTableName(list);
bool ok = DBHelper.Update(category, tableName);
if (!ok)
{
throw new InvalidOperationException();
}
if (oldname != null && list == IngredientCategories)
{
// update category name of Ingredient objects
var group = GroupedIngredients.GetOrAddGroup(oldname);
string newName = category.Name;
group.Key = newName;
foreach (var item in group)
{
var ingredient = item as Ingredient;
ingredient.Category = newName;
UpdateIngredient(ingredient);
}
// recreate grouped records
// (otherwise there is display problem in grid view)
this.GroupedIngredients = Ingredients.GetGroupedList();
// update item count of all categories
IngredientCategories.CountItemsFrom(GroupedIngredients);
}
}
/// <summary>
/// Initializes an ingredient object.
/// </summary>
/// <param name="name">The name of the ingredient.</param>
/// <param name="category">The category of the ingredient.</param>
/// <param name="quantity">The quantity of the ingredient (in specified unit).</param>
/// <param name="unit">The unit in which the ingredient is measured.</param>
public Ingredient(string name, IngredientCategories category, float quantity, Units unit)
{
Name = name;
Category = category;
Quantity = quantity;
Unit = unit;
}
public void UpdateIngredient(Ingredient item)
{
// update record in db
bool ok = DBHelper.Update(item);
if (!ok)
{
throw new InvalidOperationException();
}
// remove item from old group if category is changed
bool isRemoved = false;
foreach (var group in GroupedIngredients)
{
if (group.Contains(item) && (string)group.Key != item.Category)
{
group.Remove(item);
isRemoved = true;
}
}
// add item to new group if needed
if (isRemoved)
{
GroupedIngredients.GetOrAddGroup(item.Category).Add(item);
// recount items in categories
IngredientCategories.CountItemsFrom(GroupedIngredients);
}
}
public void RemoveIngredientCategory(IngredientCategory ic)
{
foreach (var i in Ingredients)
{
i.Categories.RemoveAll(s => s.Name == ic.Name);
}
IngredientCategories.RemoveAll(s => s.Name == ic.Name);
}
// constructor
private MainModelView()
{
InitializeDatabase();
ReadAllFromDB();
IngredientCategories.CountItemsFrom(GroupedIngredients);
// async post-process for loading thumbnails and delete unused thumbnails
LoadThumbtails().ContinueWith(t => DeleteUnusedThumbnails());
}
public void DeleteIngredient(Ingredient item)
{
// delete record from db
bool ok = DBHelper.Delete(item);
if (!ok)
{
throw new InvalidOperationException();
}
// remove item from collection
Ingredients.Remove(item);
// remove item from grouped collection
GroupedIngredients.GetOrAddGroup(item.Category).Remove(item);
// recount items in categories
IngredientCategories.CountItemsFrom(GroupedIngredients);
}
public void AddIngredient(Ingredient item)
{
// add new record to database
bool ok = DBHelper.Insert(item);
if (!ok)
{
throw new InvalidOperationException();
}
// add item to collection
Ingredients.Add(item);
// add item to grouped collection
GroupedIngredients.GetOrAddGroup(item.Category).Add(item);
// recount items in categories
IngredientCategories.CountItemsFrom(GroupedIngredients);
}
// public methods
public void AddCategory(Category category, CategoryList list)
{
// add new record to database
string tableName = GetDBTableName(list);
bool ok = DBHelper.Insert(category, tableName);
if (!ok)
{
throw new InvalidOperationException();
}
// add to catagory list
list.Add(category);
// update item count of new category
if (list == IngredientCategories)
{
IngredientCategories.CountItemsFrom(GroupedIngredients);
}
}
/// <summary>
/// Initializes an ingredient object of the Common Unit type.
/// </summary>
/// <param name="name">The name of the ingredient.</param>
/// <param name="category">The category of the ingredient.</param>
public Ingredient(string name, IngredientCategories category) : this(name, category, -1f, Units.Common)
{
}
