public static IDisposable Navigate(NavigationRequest navigationRequest, INavigationHandler navigationHandler, Action <ResponseStatus> statusCallback)
{
Guard.ArgumentNotNull(navigationRequest, "navigationRequest");
Guard.ArgumentNotNull(navigationHandler, "navigationHandler");
// if the request already had a token then dispose it
if (navigationRequest.Token != null)
{
navigationRequest.Token.Dispose();
}
// create a new token
var _disposableToken = new DisposableToken();
navigationRequest.Token = _disposableToken;
// and process the response
navigationHandler.ProcessRequest(navigationRequest, async(b) =>
{
// if the handler will not process it - note we don't return the
if (!b)
{
statusCallback.Notify(ResponseStatus.Cancelled);
_disposableToken.Dispose();
return;
}
// if the token was already disposed then we tell the handler it was cancelled
if (_disposableToken.IsDisposed)
{
statusCallback.Notify(ResponseStatus.Cancelled);
await navigationHandler.ProcessResponseAsync(new NavigationResponse(navigationRequest, ResponseStatus.Cancelled, null, null));
return;
}
// we delegate to the routing engine
Resolve(navigationRequest, async(r) =>
{
// if not cancelled
if (!_disposableToken.IsDisposed)
{
await navigationHandler.ProcessResponseAsync(r);
statusCallback.Notify(r.Status);
}
else
{
await navigationHandler.ProcessResponseAsync(new NavigationResponse(navigationRequest, ResponseStatus.Cancelled, null, null));
statusCallback.Notify(ResponseStatus.Cancelled);
}
});
});
return(_disposableToken);
}
