public static void ClickAddDeck(String title, String author, String subject, String description, String imagePath, CategoryViewModel category)
{
var _deck = GetDeck(category, title);
if (_deck == null)
{
_deck = new DeckViewModel("", category, title, author, subject, description, imagePath);
FlashcardDataSource.AddDeck(_deck);
}
}
public static void ClickAddCategory(String name)
{
CategoryViewModel _category = GetCategory(name);
if (_category == null)
{
CategoryViewModel newCategory = new CategoryViewModel("",name);
FlashcardDataSource.AddCategory(newCategory);
}
}
public async Task<CategoryViewModel> GetCategory(int categoryId)
{
var category = new CategoryViewModel();
var db = new SQLiteAsyncConnection(App.DBPath);
var _category = await db.FindAsync<Category>(c => c.Id == categoryId);
if (_category == null)
return null;
category.Id = _category.Id;
category.Name = _category.Name;
return category;
}
public async Task<ObservableCollection<CategoryViewModel>> GetCategories()
{
_categories = new ObservableCollection<CategoryViewModel>();
var db = new SQLiteAsyncConnection(App.DBPath);
var query = await db.Table<Category>().OrderBy(c => c.Name).ToListAsync();
foreach (var c in query)
{
var _category = new CategoryViewModel();
_category.Id = c.Id;
_category.Name = c.Name;
_categories.Add(_category);
}
return _categories;
}
public FlashcardDataSource()
{
databasePath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "MyDatabase.db");
using (var database = new SQLiteConnection(databasePath))
{
database.CreateTable<Category>();
database.CreateTable<Deck>();
database.CreateTable<Card>();
}
var category1 = new CategoryViewModel("", "english");
AddCategory(category1);
AllCategories.Add(category1);
var deck1 = new DeckViewModel("", category1, "1001 words need to know", "Thang", "toefl", "", "");
AddDeck(deck1);
AllDecks.Add(deck1);
var card1 = new CardsViewModel("", "abc", "abc", deck1);
AddCard(card1);
AllCards.Add(card1);
}
public static void ClickEditCategory(CategoryViewModel category, String newCategoryName)
{
if (category != null)
{
category.Name = newCategoryName;
FlashcardDataSource.UpdateCategory(category);
}
}
public static void ClickDeleteCategory(CategoryViewModel category)
{
if (category != null)
FlashcardDataSource.DeleteCategory(category);
}
public static DeckViewModel GetDeck(CategoryViewModel category,String title)
{
var _decks = FlashcardDataSource.GetDecks(category);
foreach (var _deck in _decks)
{
if (_deck.Title == title)
return _deck;
}
return null;
}
public static void AddCategory(CategoryViewModel category)
{
using (var database = new SQLiteConnection(databasePath))
{
var _category = new Category();
_category.Id = Guid.NewGuid();
_category.Name = category.Name;
database.Insert(_category);
category.UniqueId = _category.Id.ToString();
}
}
public static void UpdateCategory(CategoryViewModel category)
{
using (var database = new SQLiteConnection(databasePath))
{
var _category = database.Find<Category>(c1 => c1.Id.ToString() == category.UniqueId);
if (_category != null)
{
_category.Name = category.Name;
database.Update(_category);
}
}
}
//function for deck
// get
// add
// edit
// delete
public static ObservableCollection<DeckViewModel> GetDecks(CategoryViewModel category)
{
_flashcardDataSource._allDecks.Clear();
using (var database = new SQLiteConnection(databasePath))
{
var decks = database.Table<Deck>().Where(d1 => d1.Id.ToString() == category.UniqueId).OrderBy(d2 => d2.Title);
foreach (var deck in decks)
{
DeckViewModel flashcardDataDeck = new DeckViewModel(""+deck.Id,
category,
deck.Title,
deck.Author,
deck.Subject,
deck.Description,
deck.ImagePath);
_flashcardDataSource._allDecks.Add(flashcardDataDeck);
}
}
return _flashcardDataSource.AllDecks;
}
// function for category
// get
// add
// edit
// delete
public static ObservableCollection<CategoryViewModel> GetCategories(String uniqueId)
{
_flashcardDataSource._allCategories.Clear();
using (var database = new SQLiteConnection(databasePath))
{
var _categories = database.Table<Category>().OrderBy(c1 => c1.Name);
foreach (var _category in _categories)
{
CategoryViewModel categoriesViewModel = new CategoryViewModel(_category.Id.ToString(), _category.Name);
_flashcardDataSource._allCategories.Add(categoriesViewModel);
}
}
return _flashcardDataSource._allCategories;
}
public static void DeleteCategory(CategoryViewModel category)
{
using (var database = new SQLiteConnection(databasePath))
{
var _category = database.Find<Category>(c1 => c1.Id.ToString() == category.UniqueId);
database.Delete(category);
}
}
public async Task<string> SaveCategory(CategoryViewModel category)
{
string result = String.Empty;
var db = new SQLiteAsyncConnection(App.DBPath);
try
{
var existingCategory = await (db.Table<Category>().Where(c1 => c1.Id == category.Id)).FirstOrDefaultAsync();
if (existingCategory != null)
{
existingCategory.Name = category.Name;
int success = await db.UpdateAsync(existingCategory);
}
else
{
var _category = new Category();
_category.Name = category.Name;
int success = await db.InsertAsync(_category);
}
result = "success";
}
catch
{
result = "this category was not saved";
}
return result;
}
