public static async Task RefreshEbooksAsync()
{
await _ebooksAsyncLock.WaitAsync();
try
{
var credentials = CredentialsService.GetProviderCredentials();
foreach (var credential in credentials)
{
var provider = EbookProviderService.GetProvider(credential);
Ebook[] ebooks;
try
{
ebooks = await provider.GetEbooksAsync();
}
catch
{
await provider.AuthenticateAsync(credential);
ebooks = await provider.GetEbooksAsync();
}
await EbookStorage.SaveEbooksAsync(ebooks);
await UIThread.RunAsync(() =>
{
// TODO: Support for multiple providers of the same books
// remove
{
var oldEbooks = Ebooks.Where(eb => !ebooks.Select(ebb => ebb.Isbn).Contains(eb.Isbn)).ToArray();
foreach (var oldEbook in oldEbooks)
{
Ebooks.Remove(oldEbook);
}
}
// Add
foreach (var ebook in ebooks)
{
var existing = Ebooks.FirstOrDefault(eb => eb.Isbn == ebook.Isbn);
if (existing == null)
{
Ebooks.Add(ebook);
}
}
});
}
}
finally
{
_ebooksAsyncLock.Release();
}
}
public static async Task <Ebook[]> LoadEbooksAsync()
{
var ebooks = await EbookStorage.GetEbooksAsync();
if (ebooks != null)
{
// One place to do it.
foreach (var ebook in ebooks.Where(eb => eb.Expires < DateTime.Today))
{
await PageStorage.DeleteEbookAsync(ebook);
// Maybe unpin, or change the tiles image.
}
}
return(ebooks);
}
public async void Run(IBackgroundTaskInstance taskInstance)
{
var deferral = taskInstance.GetDeferral();
// Credentials from settings to PasswordVault
{
IPropertySet LocalSettings = ApplicationData.Current.LocalSettings.Values;
IPropertySet RoamingSettings = ApplicationData.Current.RoamingSettings.Values;
if (LocalSettings.ContainsKey("username"))
{
var vault = new PasswordVault();
vault.Add(new PasswordCredential("Hermods Novo", (string)LocalSettings["username"], (string)LocalSettings["password"]));
LocalSettings.Remove("username");
LocalSettings.Remove("password");
try
{
RoamingSettings.Remove("username");
RoamingSettings.Remove("password");
}
catch { }
}
}
// From 1.0.5.0
{
const string FILE_NAME = "ebooksList.json";
StorageFolder StorageFolder = ApplicationData.Current.LocalFolder;
var hermodsNovoEbooks = await StorageFolder.ContainsFileAsync(FILE_NAME) ? await StorageFolder.GetObjectAsync<HermodsNovoEbook[]>(FILE_NAME) : new HermodsNovoEbook[0];
if (hermodsNovoEbooks.Any(hne => hne.Url != null))
{
var ebooks = hermodsNovoEbooks.Select(HermodsNovoEbookProvider.ConvertToEbook).ToArray();
await EbookStorage.SaveEbooksAsync(ebooks);
}
}
deferral.Complete();
}
