/// <summary>
/// Invokes the specified <paramref name="continueWithFunction"/> function if <paramref name="serviceResponse"/>.IsLeft.
/// Allows you to re-direct control flow with a new <typeparamref name="T" /> value.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="continueWithFunction">The continue with function.</param>
/// <returns>If errors exist, returns the instance of IServiceResponse{T} returned by <paramref name="continueWithFunction" />, else returns current instance.</returns>
public static IServiceResponse <T> CatchAndContinue <T>(this IServiceResponse <T> serviceResponse, Func <Error, IServiceResponse <T> > continueWithFunction)
{
if (serviceResponse.IsLeft)
{
return(continueWithFunction.Invoke(serviceResponse.GetLeft()));
}
return(serviceResponse);
}
/// <summary>
/// If <paramref name="serviceResponse"/>.IsLeft, returns a new <see cref="IServiceResponse{T2}" /> instance with the current
/// <paramref name="serviceResponse"/>.Error. Otherwise, it binds the <paramref name="serviceResponse"/>.Data into the specified
/// <paramref name="bindingFunction" />.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="T2">The type of the next <see cref="IServiceResponse{T2}" /> to return.</typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="bindingFunction">The binding function.</param>
/// <returns>Instance of <see cref="IServiceResponse{T2}" />.</returns>
public static IServiceResponse <T2> Bind <T, T2>(this IServiceResponse <T> serviceResponse, Func <T, IServiceResponse <T2> > bindingFunction)
{
if (serviceResponse.IsLeft)
{
return(serviceResponse.CreateGenericErrorResponse <T, T2>(serviceResponse.GetLeft()));
}
return(bindingFunction.Invoke(serviceResponse.GetRight()));
}
/// <summary>
/// Invokes the specified action if <paramref name="serviceResponse"/>.IsLeft.
/// Returns the current instance.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="action">The action to invoke.</param>
/// <returns>The current <see cref="IServiceResponse{T}" /> instance.</returns>
public static IServiceResponse <T> Catch <T>(this IServiceResponse <T> serviceResponse, Action <Error> action)
{
if (serviceResponse.IsLeft)
{
action.Invoke(serviceResponse.GetLeft());
}
return(serviceResponse);
}
/// <summary>
/// Returns the error.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <returns>Error.</returns>
/// <exception cref="System.InvalidOperationException">There is nothing to return from left of either - Error or Data.</exception>
public static Error FromLeft <T>(this IServiceResponse <T> serviceResponse)
{
if (!serviceResponse.IsLeft)
{
throw new InvalidOperationException("Cannot return left of either when is right.");
}
return(serviceResponse.GetLeft());
}
/// <summary>
/// Invokes the specified <paramref name="continueWithFunction"/> function if <paramref name="serviceResponse"/>.IsLeft.
/// Allows you to re-direct control flow with a new <typeparamref name="T" /> value.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="continueWithFunction">The continue with function.</param>
/// <returns>If errors exist, returns the instance of IServiceResponse{T} returned by <paramref name="continueWithFunction" />, else returns current instance.</returns>
public static IServiceResponse <T> CatchAndContinue <T>(this IServiceResponse <T> serviceResponse, Func <Error, T> continueWithFunction)
{
if (serviceResponse.IsLeft)
{
T result = continueWithFunction.Invoke(serviceResponse.GetLeft());
return(new DataResponse <T>(result));
}
return(serviceResponse);
}
/// <summary>
/// If <paramref name="serviceResponse"/>.IsLeft, returns a new <see cref="IServiceResponse{T2}" /> instance with the current
/// <paramref name="serviceResponse"/>.Error. Otherwise, it binds the <paramref name="serviceResponse"/>.Data into
/// the specified <paramref name="mappingFunction" />.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="T2">The type of the next <see cref="IServiceResponse{T2}" /> to return.</typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="mappingFunction">The mapping function.</param>
/// <returns>Instance of <see cref="IServiceResponse{T2}" />.</returns>
public static IServiceResponse <T2> Fmap <T, T2>(this IServiceResponse <T> serviceResponse, Func <T, T2> mappingFunction)
{
if (serviceResponse.IsLeft)
{
return(serviceResponse.CreateGenericErrorResponse <T, T2>(serviceResponse.GetLeft()));
}
T2 result = mappingFunction.Invoke(serviceResponse.GetRight());
return(serviceResponse.CreateGenericDataResponse(result));
}
/// <summary>
/// Invokes the specified <paramref name="continueWithFunction"/> function if <see cref="IServiceResponse{T}.IsLeft"/>.
/// Allows you to re-direct control flow with a new <typeparamref name="T" /> value.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="continueWithFunction">The continue with function.</param>
/// <returns>If <paramref name="serviceResponse"/>.IsLeft, then the instance of <see cref="IServiceResponse{T}" />
/// returned by <paramref name="continueWithFunction" />, else returns current <paramref name="serviceResponse"/>.</returns>
public static Task <IServiceResponse <T> > CatchAndContinueAsync <T>(
this IServiceResponse <T> serviceResponse,
Func <Error, Task <IServiceResponse <T> > > continueWithFunction)
{
if (serviceResponse.IsLeft)
{
return(continueWithFunction.Invoke(serviceResponse.GetLeft()));
}
return(Task.FromResult(serviceResponse));
}
/// <summary>
/// Invokes the specified <paramref name="continueWithFunction"/> function if <see cref="IServiceResponse{T}.IsLeft"/>.
/// Allows you to re-direct control flow with a new <typeparamref name="T" /> value.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="continueWithFunction">The continue with function.</param>
/// <returns>If <paramref name="serviceResponse"/>.IsLeft, then the instance of <see cref="IServiceResponse{T}" />
/// returned by <paramref name="continueWithFunction" />, else returns current <paramref name="serviceResponse"/>.</returns>
public static Task <IServiceResponse <T> > CatchAndContinueAsync <T>(
this IServiceResponse <T> serviceResponse,
Func <Error, T> continueWithFunction)
{
var tcs = new TaskCompletionSource <IServiceResponse <T> >();
if (serviceResponse.IsLeft)
{
T result = continueWithFunction.Invoke(serviceResponse.GetLeft());
tcs.SetResult(new DataResponse <T>(result));
}
else
{
tcs.SetResult(serviceResponse);
}
return(tcs.Task);
}
/// <summary>
/// Invokes the specified function if <see cref="IServiceResponse{T}.IsLeft"/>. Returns the current <paramref name="serviceResponse"/>
/// unless the <paramref name="catchFunc"/> returns a faulted task. <see cref="Task.IsFaulted"/>
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="catchFunc">Async function to invoke.</param>
/// <returns>The current <paramref name="serviceResponse"/> unless the <paramref name="catchFunc"/> returns a faulted task.</returns>
public static Task <IServiceResponse <T> > CatchAsync <T>(
this IServiceResponse <T> serviceResponse,
Func <Error, Task> catchFunc)
{
if (serviceResponse.IsLeft)
{
return(catchFunc.Invoke(serviceResponse.GetLeft())
.ContinueWith(task =>
{
if (task.IsFaulted)
{
return serviceResponse.CreateGenericErrorResponse(task.Exception.ToError());
}
return serviceResponse;
},
CancellationToken.None,
TaskContinuationOptions.ExecuteSynchronously,
TaskScheduler.Default));
}
return(Task.FromResult(serviceResponse));
}
public static async Task <IServiceResponse <IEnumerable <T2> > > BindManyAsync <T, T2>(
this IServiceResponse <IEnumerable <T> > serviceResponse,
Func <T, Task <IServiceResponse <T2> > > bindFunc)
{
if (serviceResponse.IsLeft)
{
return(serviceResponse.CreateGenericErrorResponse <IEnumerable <T>, IEnumerable <T2> >(serviceResponse.GetLeft()));
}
var result = new List <T2>();
foreach (var element in serviceResponse.GetRight())
{
var elementResponse = await bindFunc(element);
if (elementResponse.IsLeft)
{
return(serviceResponse.CreateGenericErrorResponse <IEnumerable <T>, IEnumerable <T2> >(elementResponse.GetLeft()));
}
result.Add(elementResponse.GetRight());
}
return(serviceResponse.CreateGenericDataResponse(result));
}
/// <summary>
/// If <seealso cref="IServiceResponse{T}.IsLeft" />, returns a new <see cref="IServiceResponse{T2}" /> instance with the current
/// <seealso cref="IServiceResponse{T}.Error" />. Else, binds the <seealso cref="IServiceResponse{T}.Data" /> into the
/// specified <paramref name="bindFunc" />.
/// </summary>
/// <typeparam name="T">The type of the current <see cref="IServiceResponse{T}"/>.</typeparam>
/// <typeparam name="T2">The type of the next <see cref="IServiceResponse{T2}" /> to return.</typeparam>
/// <param name="serviceResponse">The service response.</param>
/// <param name="bindFunc">The binding function.</param>
/// <returns>Instance of <see cref="IServiceResponse{T2}" />.</returns>
public static Task <IServiceResponse <T2> > BindAsync <T, T2>(
this IServiceResponse <T> serviceResponse,
Func <T, Task <IServiceResponse <T2> > > bindFunc)
{
if (serviceResponse.IsLeft)
{
return(Task.FromResult(serviceResponse.CreateGenericErrorResponse <T, T2>(serviceResponse.GetLeft())));
}
return(bindFunc(serviceResponse.GetRight()));
}
