public ShoppingCart GetUserShoppingCart(User user)
{
ShoppingCart shoppingCart = new ShoppingCart(-1);
string[] lines = File.ReadAllLines(user.FileName);
if(lines != null)
{
foreach(string line in lines)
{
string[] itemDetails = line.Split(',');
Item item = new Item();
int amount = int.Parse(itemDetails[0]);
item.Id = long.Parse(itemDetails[1]);
item.Name = itemDetails[2];
item.Price = itemDetails[3];
item.Quantity = itemDetails[4];
item.UnitOfMeasure = itemDetails[5];
item.Code = itemDetails[6];
item.Type = itemDetails[7];
item.StoreId = long.Parse(itemDetails[8]);
shoppingCart.AddItem(item, amount);
}
return shoppingCart;
}
return null;
}
public ShoppingCart CompareShoppingCart(long storeId, ShoppingCart oldShoppingCart)
{
ShoppingCart newShoppingCart = new ShoppingCart(storeId);
List<Item> items = GetItemsByStoreId(storeId);
foreach (var item in oldShoppingCart.Items)
{
if (item.Key.Type == "1")
{
var tempList = items.Where(newItem => newItem.Code == item.Key.Code).ToList();
if ((tempList != null) && (tempList.Count == 1))
{
newShoppingCart.AddItem(tempList[0], item.Value);
}
}
else
{
var tempList = items.Where(newItem => newItem.Name == item.Key.Name).ToList();
if ((tempList != null) && (tempList.Count == 1))
{
newShoppingCart.AddItem(tempList[0], item.Value);
}
}
}
return newShoppingCart;
}
private void PopulateShoppingCart(ShoppingCart shoppingCart, ListBox listBox, Label label)
{
foreach (var item in shoppingCart.Items)
{
listBox.Items.Add(item);
}
shoppingCart.CalculateSum();
label.Text = oldShoppingCart.Sum.ToString();
}
public ComparerForm(ShoppingCart oldShoppingCart, List<Store> stores)
{
InitializeComponent();
this.oldShoppingCart = oldShoppingCart;
this.stores = stores;
manager = new PriceCompareManager();
PopulateNewShoppingCart(oldShoppingCart, listViewOldShoppingCart, labelOldShoppingCart);
PopulateStores();
}
private void listViewStores_SelectedIndexChanged(object sender, EventArgs e)
{
if (listViewStores.SelectedItems.Count == 0)
{
return;
}
ListViewItem item = listViewStores.SelectedItems[0];
newShoppingCart = manager.CompareShoppingCart(long.Parse(item.Text), oldShoppingCart);
PopulateNewShoppingCart(newShoppingCart, listViewNewShoppingCart, labelNewShopingCart);
}
private void PopulateNewShoppingCart(ShoppingCart ShoppingCart, ListView listView, Label labelSum)
{
listViewNewShoppingCart.Items.Clear();
foreach (var element in ShoppingCart.Items)
{
ListViewItem listViewItem = new ListViewItem(element.Key.Name);
listViewItem.SubItems.Add(element.Key.Price);
listViewItem.SubItems.Add(element.Value.ToString());
listView.Items.Add(listViewItem);
}
ShoppingCart.CalculateSum();
labelSum.Text = ShoppingCart.Sum.ToString();
ShowMessageAboutShoppingCart(ShoppingCart);
}
private void ShowMessageAboutShoppingCart(ShoppingCart newShoppingCart)
{
List<Item> items = newShoppingCart.Items.Keys.Where(item => item.Type != "1").ToList();
if(items.Count > 0)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("In this shopping cart There is sum of internal items of the store.");
sb.AppendLine("Because of this the comparison may be incorrect.");
sb.AppendLine("The internal items:");
foreach (var item in items)
{
sb.AppendLine(item.Name);
}
MessageBox.Show(sb.ToString());
}
}
public void SaveShoppingCartToTheUser(User user, ShoppingCart shoppingCart)
{
StreamWriter file = new StreamWriter(user.FileName);
StringBuilder sb = new StringBuilder();
foreach (var element in shoppingCart.Items)
{
sb.Append(element.Value + ",");
sb.Append(element.Key.Id + ",");
sb.Append(element.Key.Name + ",");
sb.Append(element.Key.Price + ",");
sb.Append(element.Key.Quantity + ",");
sb.Append(element.Key.UnitOfMeasure + ",");
sb.Append(element.Key.Code + ",");
sb.Append(element.Key.Type + ",");
sb.Append(element.Key.StoreId);
sb.Append("\n");
}
file.Write(sb.ToString());
file.Close();
}