/// <summary>
/// Load more messages when scroll reached the end of the page
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void OnLoadMoreMessages(object sender, ItemVisibilityEventArgs e)
{
if (dialogsManager.GetIsInitRequired(dialogId))
{
return;
}
var message = (Message)e.Item;
var messagesCount = messagesManager.GetMessagesCount(dialogId);
if (messagesCount >= Consts.BatchSize && messagesManager.IsMessageOlderThanAll(dialogId, message.Id))
{
activityIndicator.IsVisible = true;
await NetExceptionCatchHelpers.CatchNetException(
async() =>
{
await messagesManager.UpdateMessagesFromApi(dialogId, messagesCount);
messagesListView.ScrollIfExist(message, ScrollToPosition.Center);
},
() =>
{
OnLoadMoreMessages(sender, e);
return(Task.CompletedTask);
},
LocalizedStrings.MessagesNoInternetError);
activityIndicator.IsVisible = false;
}
}
