/// <summary>
/// Opens the system web browser for the user to sign in to their account.
/// </summary>
/// <param name="customUrlHandler">
/// A handler that will open a URL in system browser, register a custom
/// callback URL handler and wait for the app to go foreground.
///
/// You can use <see cref="SafariUrlHandler.Instace" />, given that you call its
/// <c>WillEnterForeground</c> and <c>HandleOpenUrl</c> methods from your <c>AppDelegate</c>.
/// </param>
/// <returns>
/// A task for when authentication has completed.
/// </returns>
public virtual Task <IEnumerable <Account> > GetAccountsWithBrowserAsync(ICustomUrlHandler customUrlHandler)
{
if (customUrlHandler == null)
{
throw new ArgumentNullException("customUrlHandler",
"This overload needs a handler to launch system browser and wait for redirect. " +
"You can use SafariUrlHandler.Instace, given that you call its " +
"WillEnterForeground and HandleOpenUrl methods from your AppDelegate.");
}
var tcs = new TaskCompletionSource <IEnumerable <Account> > ();
var authenticator = GetAuthenticator() as WebAuthenticator;
if (authenticator == null)
{
throw new NotSupportedException("This service does not support authentication via web browser.");
}
authenticator.Error += (sender, e) => {
tcs.TrySetException(e.Exception ?? new SocialException(e.Message));
};
authenticator.Completed += (sender, e) => {
if (e.IsAuthenticated)
{
SaveAccount(e.Account);
tcs.TrySetResult(new [] { e.Account });
}
else
{
tcs.TrySetCanceled();
}
};
authenticator.AuthenticateWithBrowser(customUrlHandler);
return(tcs.Task);
}
/// <summary>
/// Opens authentication page in system browser and waits for the app to go foreground with a custom URL.
/// </summary>
/// <param name="handler">Custom URL handler. Use <see cref="SafariUrlHandler.Instance"/> for iOS.</param>
public void AuthenticateWithBrowser(ICustomUrlHandler handler)
{
if (CustomUrl.AbsoluteUri.StartsWith("http"))
{
throw new InvalidOperationException(string.Format(
"You need to replace '{0}' with application-specific custom URL to use browser authentication.", CustomUrl));
}
GetInitialUrlAsync().ContinueWith(initUrlTask => {
if (initUrlTask.IsFaulted)
{
OnError(initUrlTask.Exception);
}
else if (initUrlTask.IsCanceled)
{
OnCancelled();
}
var externalUrl = initUrlTask.Result;
handler.OpenUrl(externalUrl, CustomUrl.Scheme).ContinueWith(callbackTask => {
if (callbackTask.IsFaulted)
{
OnError(callbackTask.Exception);
}
else if (callbackTask.IsCanceled)
{
OnCancelled();
}
else
{
OnPageLoaded(callbackTask.Result);
}
}, TaskScheduler.FromCurrentSynchronizationContext());
}, TaskScheduler.FromCurrentSynchronizationContext());
}
/// <summary>
/// Opens authentication page in system browser and waits for the app to go foreground with a custom URL.
/// </summary>
/// <param name="handler">Custom URL handler. Use <see cref="SafariUrlHandler.Instance"/> for iOS.</param>
public void AuthenticateWithBrowser (ICustomUrlHandler handler)
{
if (CustomUrl.AbsoluteUri.StartsWith ("http"))
throw new InvalidOperationException (string.Format (
"You need to replace '{0}' with application-specific custom URL to use browser authentication.", CustomUrl));
GetInitialUrlAsync ().ContinueWith (initUrlTask => {
if (initUrlTask.IsFaulted)
OnError (initUrlTask.Exception);
else if (initUrlTask.IsCanceled)
OnCancelled ();
var externalUrl = initUrlTask.Result;
handler.OpenUrl (externalUrl, CustomUrl.Scheme).ContinueWith (callbackTask => {
if (callbackTask.IsFaulted)
OnError (callbackTask.Exception);
else if (callbackTask.IsCanceled)
OnCancelled ();
else
OnPageLoaded (callbackTask.Result);
}, TaskScheduler.FromCurrentSynchronizationContext ());
}, TaskScheduler.FromCurrentSynchronizationContext ());
}
/// <summary>
/// Opens the system web browser for the user to sign in to their account.
/// </summary>
/// <param name="customUrlHandler">
/// A handler that will open a URL in system browser, register a custom
/// callback URL handler and wait for the app to go foreground.
///
/// You can use <see cref="SafariUrlHandler.Instace" />, given that you call its
/// <c>WillEnterForeground</c> and <c>HandleOpenUrl</c> methods from your <c>AppDelegate</c>.
/// </param>
/// <returns>
/// A task for when authentication has completed.
/// </returns>
public virtual Task<IEnumerable<Account>> GetAccountsWithBrowserAsync (ICustomUrlHandler customUrlHandler)
{
if (customUrlHandler == null)
throw new ArgumentNullException ("customUrlHandler",
"This overload needs a handler to launch system browser and wait for redirect. " +
"You can use SafariUrlHandler.Instace, given that you call its " +
"WillEnterForeground and HandleOpenUrl methods from your AppDelegate.");
var tcs = new TaskCompletionSource<IEnumerable<Account>> ();
var authenticator = GetAuthenticator () as WebAuthenticator;
if (authenticator == null)
throw new NotSupportedException ("This service does not support authentication via web browser.");
authenticator.Error += (sender, e) => {
tcs.TrySetException (e.Exception ?? new SocialException (e.Message));
};
authenticator.Completed += (sender, e) => {
if (e.IsAuthenticated) {
SaveAccount (e.Account);
tcs.TrySetResult (new [] { e.Account });
} else {
tcs.TrySetCanceled ();
}
};
authenticator.AuthenticateWithBrowser (customUrlHandler);
return tcs.Task;
}
