/// <summary>
/// Runs update checking. For each discovered module performs check for update. Uses <see cref="IDependencyChecker"/> to distinguish whether
/// the module needs to be updated or not.
/// </summary>
/// <remarks>
/// <para>
/// Method return result by <see cref="NomadAvailableUpdatesMessage"/> event, so it may be invoked asynchronously.
/// </para>
/// <para>
/// This methods does not throw any exception in case of failure, because the <see cref="Exception"/> derived classes
/// cannot cross app domain boundaries. All information about failures are passed through <see cref="IEventAggregator"/> message bus.
/// </para>
/// </remarks>
public void CheckUpdates()
{
Status = UpdaterStatus.Checking;
AvailableModules availableModules;
try
{
// connect to repository - fail safe
availableModules = _modulesRepository.GetAvailableModules();
}
catch (Exception e)
{
InvokeErrorAvaliableMessage(e.Message);
return;
}
// null handling in repository if repository does not throw
if (availableModules == null)
{
InvokeErrorAvaliableMessage("Null from repository");
return;
}
Status = UpdaterStatus.Checked;
InvokeAvailableUpdates(new NomadAvailableUpdatesMessage(availableModules.Manifests));
// if in automatic mode begin the download phase, use all the modules discovered as available
if (Mode == UpdaterType.Automatic)
{
PrepareUpdate(new List <ModuleManifest>(availableModules.Manifests));
}
}
