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 <bool> TryAuthenticateAsync(PasswordCredential credential)
{
IEbookProvider provider = EbookProviderService.GetProvider(credential);
if (await provider.AuthenticateAsync(credential))
{
return(true);
}
else
{
EbookProviderService.RemoveProvider(provider);
return(false);
}
}
public static async Task DownloadEbookAsync(Ebook ebook)
{
var credential = CredentialsService.GetProviderCredential(ebook.Provider);
var provider = EbookProviderService.GetProvider(credential);
try
{
try
{
await provider.DownloadEbookAsync(ebook);
}
catch
{
await provider.AuthenticateAsync(credential);
await provider.DownloadEbookAsync(ebook);
}
}
catch (EbookException e)
{
ContentDialog downloadErrorDialog = new ContentDialog()
{
Title = "Kunde inte ladda ner e-bok",
Content = $"E-boken {ebook.Title} (publicerad av {ebook.Publisher}) kunde inte laddas ner. Skapa gärna ett nytt Issue på GitHub om felet inträffar flera gånger.",
CloseButtonText = "Stäng",
PrimaryButtonText = "Öppna GitHub",
PrimaryButtonCommand = new RelayCommand(async() =>
{
var uriBing = new Uri(@"https://github.com/mikaeldui/MinaLaromedel/issues");
await Windows.System.Launcher.LaunchUriAsync(uriBing);
})
};
SentrySdk.CaptureException(e);
await UIThread.RunAsync(async() => await downloadErrorDialog.ShowAsync());
}
}