public IObservable <Post> GetPost(string id)
{
return(_cache.GetAndFetchLatest(id,
async() =>
{
var result = await _fakeAPI.GetPost(id);
await Task.Delay(1000); //Fake longer network request, so we visually see the refresh happening on screen!
//Add visual timestamp to title of a post, this way we see what time the data has been fechted
result.Title = string.Concat(DateTime.Now.ToString("T", CultureInfo.InvariantCulture), " - ", result.Title);
return result;
},
offset =>
{
if (CrossConnectivity.Current.IsConnected)
{
TimeSpan elapsed = DateTimeOffset.Now - offset;
return elapsed > _cachedPostTime;
}
else
{
return false;
}
}));
}
private async Task <Post> GetPostAsync(string id)
{
var result = await _fakeAPI.GetPost(id);
await Task.Delay(1000); //Fake longer network request, so we visually see the refresh happening on screen!
//Add visual timestamp to title of a post, this way we see what time the data has been fechted
result.Title = string.Concat(DateTime.Now.ToString("T", CultureInfo.InvariantCulture), " - ", result.Title);
return(result);
}
public Task <Post> GetPost(string id)
{
return(_internalAPI.GetPost(id));
}