public static async Task <List <Category> > DownloadDB(Action retryMethod, Snackbar snack)
{
try
{
var response = await client.GetAsync(AppResources.DbLink);
if (response.IsSuccessStatusCode)
{
var payload = await response.Content.ReadAsStringAsync();
newDB = JsonConvert.DeserializeObject <List <Category> >(payload);
var newideasdbResponse = await client.GetAsync(AppResources.NewIdeasDbLink);
if (newideasdbResponse.IsSuccessStatusCode)
{
newideastxt = await newideasdbResponse.Content.ReadAsStringAsync();
DBAssist.SerializeDBAsync(oldDBPath, Global.Categories);
DBAssist.SerializeDBAsync(newideastxtPath, newideastxt);
return(newDB);
}
}
// To prevent too many requests to server, only invalidate cache if app is opening fresh from launcher
Global.LockRequests = true;
}
catch (TaskCanceledException)
{
snack.SetText("Can't load ideas. Your connection might be too slow.").SetAction("Retry", (v) => retryMethod?.Invoke()).Show();
}
catch (HttpRequestException)
{
snack.SetText("Can't load ideas. Check your connection.").SetAction("Retry", (v) => retryMethod?.Invoke()).Show();
}
catch (Exception e)
{
snack.SetText($"Oops! {e.Message}.").SetAction("Retry", (v) => retryMethod?.Invoke()).Show();
}
return(null);
}
private static async void InvalidateOldData()
{
Log.Debug(TAG, "Starting full invalidation");
var notesPath = Path.Combine(Global.APP_PATH, "notesdb");
if (!File.Exists(notesPath))
{
File.Create(notesPath);
}
var notes = await DBAssist.DeserializeDBAsync <List <Note> >(notesPath);
notes = notes ?? new List <Note>();
for (int i = 0; i < newDB.Count; i++)
{
for (int j = 0; j < newDB[i].Items.Count; j++)
{
var newItem = newDB[i].Items[j];
var oldItem = Global.Categories[i].Items.FirstOrDefault(x => x.Id == newItem.Id);
Note note = null;
if (oldItem != null)
{
note = notes.FirstOrDefault(x => x.Title == oldItem.Title);
if (note != null)
{
Log.Debug(TAG, $"Note *{note.Title}*, found for old idea *{oldItem.Title}* placed at new idea *{newItem.Title}*");
}
}
newItem.Note = note;
newItem.State = oldItem?.State;
}
}
DBAssist.SerializeDBAsync(oldDBPath, newDB);
DBAssist.SerializeDBAsync(newideastxtPath, newideastxt);
Global.Categories = newDB;
Global.LockRequests = true;
Log.Debug(TAG, "Invalidation completed.");
}