async Task InitializeAsync()
{
await ResfreshDataStorageAsync(true, false);
OnCollectionRefreshed?.Invoke(this, new EventArgs());
MessagingCenter.Subscribe <TransactionGroupingDetailPage, Transaction>(this,
ViewModelConstants.REMOVE_ITEM_SUBSCRIPTION,
async(obj, item) =>
{
var userNotificationService = DependencyService.Get <Services.IUserNotificationService>(DependencyFetchTarget.GlobalInstance);
var dialogResult = await userNotificationService.DisplayQuestionMessage(
Resources.Strings.Message_Warning_WaitTitle,
Resources.Strings.Message_Transactions_ActionWillDeleteTransaction);
if (dialogResult)
{
var _item = item as Transaction;
if (_item.Type == TransactionType.NegativeBalance)
{
MyDebtsNegativeTransactions.Remove(_item);
}
else
{
OtherDebtsPositiveTransactions.Remove(_item);
}
await dataStore.RemoveAsync(_item);
}
});
}
/// <summary>
///
/// </summary>
/// <param name="isAdding">true if adding, otherwise, replace all.</param>
/// <param name="reloadFromServer">whether must sync and reload from server or not</param>
/// <returns></returns>
internal async Task ResfreshDataStorageAsync(bool isAdding, bool reloadFromServer = false)
{
var dataStoreSyncResult = await dataStore.GetItemsAsync <Transaction>(reloadFromServer, includeNavigationProperties : true);
if (dataStoreSyncResult.Code == Models.DataStoreSyncCode.Success)
{
if (!isAdding)
{
MyDebtsNegativeTransactions.ReplaceRange(dataStoreSyncResult.Items.Where(p => p.Type == TransactionType.NegativeBalance));
OtherDebtsPositiveTransactions.ReplaceRange(dataStoreSyncResult.Items.Where(p => p.Type == TransactionType.PositiveBalance));
}
else
{
MyDebtsNegativeTransactions.AddRange(dataStoreSyncResult.Items.Where(p => p.Type == TransactionType.NegativeBalance));
OtherDebtsPositiveTransactions.AddRange(dataStoreSyncResult.Items.Where(p => p.Type == TransactionType.PositiveBalance));
}
}
}
internal void ActivateTransactionSubscription()
{
IsShowingAddItemView = true;
MessagingCenter.Subscribe <TransactionAddItemPage, Transaction>(this, ViewModelConstants.ADD_ITEM_SUBSCRIPTION, async(obj, item) =>
{
var _item = item as Transaction;
await dataStore.SaveAsync(_item);
if (_item.Type == TransactionType.NegativeBalance)
{
MyDebtsNegativeTransactions.Add(_item);
}
else
{
OtherDebtsPositiveTransactions.Add(_item);
}
IsShowingAddItemView = false;
DeactivateTransactionSubscription();
});
}
