/// <summary>
/// Creates and attaches the instance of <see cref="T:HomeCloud.DataStorage.Business.Handlers.IDataCommandHandler" /> type to execute data command.
/// </summary>
/// <typeparam name="T">The type of the handler derived from <see cref="T:HomeCloud.DataStorage.Business.Handlers.IDataCommandHandler" />.</typeparam>
/// <returns>
/// The instance of <see cref="T:HomeCloud.DataStorage.Business.Handlers.IDataCommandHandler" />.
/// </returns>
public IDataCommandHandler CreateDataHandler <T>() where T : IDataCommandHandler
{
IDataCommandHandler handler = this.commandHandlerFactory.Get <T>() as IDataCommandHandler;
if (handler != null)
{
this.AddHandler(handler);
}
return(handler);
}
/// <summary>
/// Creates the asynchronous data command executed against each item in the list of instances of <see cref="T" /> type.
/// </summary>
/// <typeparam name="T">The type of item in the list of <see cref="IEnumerable{T}"/> type.</typeparam>
/// <typeparam name="TDataProvider">The type of the data provider.</typeparam>
/// <param name="handler">The handler.</param>
/// <param name="items">The list of instances of <see cref="IEnumerable{T}"/> type.</param>
/// <param name="executeAsyncAction">The asynchronous action to execute.</param>
/// <param name="undoAsyncAction">The asynchronous action to undo.</param>
/// <returns>
/// The current instance of <see cref="IDataCommandHandler" />.
/// </returns>
public static IDataCommandHandler CreateAsyncCommandFor <T, TDataProvider>(this IDataCommandHandler handler, IEnumerable <T> items, Func <IDataProvider, T, Task> executeAsyncAction, Func <IDataProvider, T, Task> undoAsyncAction)
where TDataProvider : IDataProvider
{
if (items is null)
{
return(handler);
}
foreach (T item in items)
{
handler.CreateAsyncCommand <TDataProvider>(
provider => executeAsyncAction?.Invoke(provider, item),
provider => undoAsyncAction?.Invoke(provider, item));
}
return(handler);
}
