public async void GetPostsAsync(PostCategory postCategory)
{
switch (postCategory)
{
case PostCategory.Hot:
StartWorkIndication(ViewModelConstants.LOADING_HOT_MESSAGE);
break;
case PostCategory.Trending:
StartWorkIndication(ViewModelConstants.LOADING_TRENDING_MESSAGE);
break;
case PostCategory.Vote:
StartWorkIndication(ViewModelConstants.LOADING_FRESH_MESSAGE);
break;
}
ArePostsLoading = true;
await Task.Run(async() =>
{
var requestStatus = await _clientService.GetPostsAsync(postCategory, NUMBER_OF_POSTS);
if (requestStatus != null && requestStatus.IsSuccessful)
{
_currentCategory = postCategory;
Device.BeginInvokeOnMainThread(() =>
{
Posts.Clear();
Posts = new ObservableCollection <PostView>();
_clientService.Posts.ToList().ForEach(post =>
Posts.Add(PostViewFactory.CreatePostViewFromPost(post)));
CurrentPost = Posts.FirstOrDefault();
});
await Task.Delay(ViewModelConstants.GET_POSTS_DELAY);
}
else
{
StopWorkIndication();
string message = requestStatus == null ? ViewModelConstants.REQUEST_FAILED_MESSAGE : requestStatus.Message;
await ShowMessage(message);
}
});
ArePostsLoading = false;
StopWorkIndication();
}
public async void GetMorePostsAsync()
{
Debug.WriteLine("Getting more posts");
if (Posts.Count < 1)
{
await ShowMessage(ViewModelConstants.EMPTY_POST_LIST_MESSAGE);
return;
}
ArePostsLoading = true;
await Task.Run(async() =>
{
var requestStatus = await _clientService.GetPostsAsync(_currentCategory, NUMBER_OF_POSTS, Posts.Last().Id);
if (requestStatus != null && requestStatus.IsSuccessful)
{
Device.BeginInvokeOnMainThread(() =>
_clientService.Posts.ToList().ForEach(post =>
Posts.Add(PostViewFactory.CreatePostViewFromPost(post))));
}
else
{
string message = requestStatus == null ?
ViewModelConstants.REQUEST_FAILED_MESSAGE :
requestStatus.Message;
await ShowMessage(message);
}
});
ArePostsLoading = false;
}