static public async Task UpdateWatchedToasts(List <WhirlMonData.WhirlPoolAPIData.WATCHED> watched)
{
try
{
ToastedDictionary toasted = await ReadToasted();
// debug
// toasted.Clear();
// Remove obsoleted toasts - iterate over toasted
List <int> keysToRemove = new List <int>();
foreach (var id in toasted.Keys)
{
// Find
var w = watched.Find(x => x.ID == id);
if (w == null)
{
ClearWatchedToast(id);
keysToRemove.Add(id);
}
}
foreach (var id in keysToRemove)
{
toasted.Remove(id);
}
// add/update Toasts
foreach (var w in watched)
{
String last;
if (toasted.TryGetValue(w.ID, out last))
{
// see if updated
if (w.LAST_DATE != last)
{
ShowWatchedToast(w);
toasted[w.ID] = w.LAST_DATE;
}
}
else
{
// new
ShowWatchedToast(w);
toasted[w.ID] = w.LAST_DATE;
}
}
await WriteToasted(toasted);
}
catch (Exception x)
{
ShowErrorToast("UpdateWatchedToasts", x);
}
}
static private async Task WriteToasted(ToastedDictionary toasted)
{
try
{
// Convert to json
MemoryStream ms = new MemoryStream();
var serializer = new DataContractJsonSerializer(typeof(ToastedDictionary));
serializer.WriteObject(ms, toasted);
ms.Flush();
ms.Position = 0;
var sr = new StreamReader(ms);
String json = sr.ReadToEnd();
using (Semaphore semFile = new Semaphore(1, 1, TOASTED_SEM))
{
if (!semFile.WaitOne(2000))
{
throw new Exception("Failed to accquire toast access Semaphore");
}
try
{
// Write To File
Windows.Storage.StorageFolder temporaryFolder = ApplicationData.Current.TemporaryFolder;
StorageFile toastedFile = await temporaryFolder.CreateFileAsync("toasted.json", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteTextAsync(toastedFile, json);
}
finally
{
semFile.Release();
}
}
}
catch (Exception x)
{
ShowToast("WriteToasted:" + x.Message);
}
}
static private async Task <ToastedDictionary> ReadToasted()
{
try
{
String json = null;
using (Semaphore semFile = new Semaphore(1, 1, TOASTED_SEM))
{
if (!semFile.WaitOne(2000))
{
throw new Exception("Failed to accquire toast access Semaphore");
}
try
{
Windows.Storage.StorageFolder temporaryFolder = ApplicationData.Current.TemporaryFolder;
StorageFile toastedFile = await temporaryFolder.GetFileAsync("toasted.json");
if (!toastedFile.IsAvailable)
{
return(new ToastedDictionary());
}
json = await FileIO.ReadTextAsync(toastedFile);
}
finally
{
semFile.Release();
}
}
// Sanity checks
if (json == null)
{
return(new ToastedDictionary());
}
json = json.Trim();
if (String.IsNullOrEmpty(json))
{
return(new ToastedDictionary());
}
// parse
using (MemoryStream ms = new MemoryStream())
{
using (StreamWriter wr = new StreamWriter(ms))
{
wr.Write(json);
wr.Flush();
ms.Position = 0;
var serializer = new DataContractJsonSerializer(typeof(ToastedDictionary));
ToastedDictionary td = (ToastedDictionary)serializer.ReadObject(ms);
return(td);
}
}
}
catch (FileNotFoundException)
{
return(new ToastedDictionary());
}
catch (Exception x)
{
ShowToast("ReadToasted:" + x.Message);
return(new ToastedDictionary());
}
}
