private static void WriteFileCache(IList <Station> stations)
{
StationsData data = new StationsData()
{
Timestamp = DateTime.Now,
Stations = stations
};
string stationsJson = JsonConvert.SerializeObject(data);
File.WriteAllText(StationsCache.cachePath, stationsJson);
}
async void OnTextChangedAsync(object sender, EventArgs e)
{
SearchBar searchBar = (SearchBar)sender;
StationsData stationsData = await _tidalService.GetStationsDataAsync(GenerateRequestUriForStations(Constants.UKTidalEndpoind, searchBar.Text));
if (stationsData != null)
{
BindingContext = stationsData.Stations;
}
else
{
BindingContext = null;
}
}
private static IList <Station> FetchStationsFromFile()
{
// TODO: Check timestamp and decide whether the station list has to be refreshed.
string stationsJson = File.ReadAllText(StationsCache.cachePath);
StationsData stationsData = null;
try
{
stationsData = JsonConvert.DeserializeObject <StationsData>(stationsJson);
}
catch (Exception)
{
Console.WriteLine("Unable to deserialize file cache.");
File.Delete(StationsCache.cachePath);
}
return(stationsData?.Stations);
}
public async Task<StationsData> GetStationsDataAsync(string uri)
{
StationsData stationsData = null;
try
{
HttpResponseMessage response = await _client.GetAsync(uri);
if (response.IsSuccessStatusCode)
{
string content = await response.Content.ReadAsStringAsync();
stationsData = JsonConvert.DeserializeObject<StationsData>(content);
}
}
catch (Exception ex)
{
Debug.WriteLine("\tERROR {0}", ex.Message);
}
return stationsData;
}
public MainPage()
{
this.InitializeComponent();
stationsData = new StationsData();
}
