async Task ExecuteLoadItemsCommand()
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
Items.Clear();
var items = await ItemDataStore.GetItemsAsync(true);
foreach (var item in items)
{
Items.Add(item);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public ItemsViewModel()
{
Title = "Browse";
Items = new ObservableCollection <FirebaseObject <Item> >();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <NewItemPage, Item>(this, "AddItem", async(obj, item) =>
{
var _item = item as Item;
Items.Add(await ItemDataStore.AddAsync(_item));
});
}
public async void LoadItemId(string itemId)
{
try
{
var item = await ItemDataStore.GetItemAsync(itemId);
Text = item.Text;
Description = item.Description;
Date = item.Date;
Importance = item.Importance;
Category = item.Category;
}
catch (Exception)
{
Debug.WriteLine("Failed to Load Item");
}
}
public override Item CreateItem(Category category, string owner,
string title, string description,
string url, string urlName,
DateTime newsDate)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ItemDataStore dataStore = new ItemDataStore(transaction);
Item item = new Item(category, owner, title, description, url, urlName, newsDate);
dataStore.Insert(item);
transaction.Commit();
return item;
}
}
public override void DeleteItem(Item item)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ItemDataStore dataStore = new ItemDataStore(transaction);
dataStore.Delete(item.Id);
transaction.Commit();
}
}
public override IList<Item> GetItems(Category category, PagingInfo paging)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ItemDataStore dataStore = new ItemDataStore(transaction);
return dataStore.FindByCategory(category, paging);
}
}
public override Item GetItem(string id)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ItemDataStore dataStore = new ItemDataStore(transaction);
return dataStore.FindByKey(id);
}
}
public override IList<Item> FindItems(Filter<string> categoryName,
Filter<string> tag,
DateTime? fromDate, DateTime? toDate,
PagingInfo paging)
{
using (TransactionScope transaction = new TransactionScope(mConfiguration))
{
ItemDataStore dataStore = new ItemDataStore(transaction);
return dataStore.FindByFields(categoryName, tag, fromDate, toDate, paging);
}
}
public async Task AddAsyncTest()
{
var dataStore = new ItemDataStore(new List <Item>());
await dataStore.AddAsync(new Item { Id = 1, Name = "Test1" });
}