public static async Task <Fallible <T> > OnFailureAsync <T>(this Fallible <T> source, Func <Exception, Task> action)
{
if (source.IsFailure)
{
await action(source.Exception).ConfigureAwait(false);
}
return(source);
}
public static Fallible <T> OnSuccess <T>(this Fallible <T> source, Action <T> action)
{
if (source.IsSuccess)
{
action(source.Value);
}
return(source);
}
public static Fallible <T> OnFailure <T>(this Fallible <T> source, Action <Exception> action)
{
if (source.IsFailure)
{
action(source.Exception);
}
return(source);
}
public static async Task <Fallible <T> > OnSuccessAsync <T>(this Fallible <T> source, Func <T, Task> action)
{
if (source.IsSuccess)
{
await action(source.Value).ConfigureAwait(false);
}
return(source);
}
public static Fallible <T> Operation <T>(Func <T> operation)
{
try
{
return(Fallible <T> .Success(operation()));
}
catch (Exception exception)
{
return(Fallible <T> .Fail(exception));
}
}
public static void Do <T>(this Fallible <T> source, Action <T> onSuccess, Action <Exception> onFail)
{
if (source.IsSuccess)
{
onSuccess(source.Value);
}
else
{
onFail(source.Exception);
}
}
public static async Task <Fallible <T> > OperationAsync <T>(Func <Task <T> > operation)
{
try
{
return(Fallible <T> .Success(await operation().ConfigureAwait(false)));
}
catch (Exception exception)
{
return(Fallible <T> .Fail(exception));
}
}
public static T ValueOrThrow <T>(this Fallible <T> source)
{
if (source.IsSuccess)
{
return(source.Value);
}
else
{
throw source.Exception;
}
}
public static async Task <Fallible <TResult> > SelectAsync <TSource, TResult>(this Task <Fallible <TSource> > sourceTask, Func <TSource, Task <Fallible <TResult> > > projection)
{
var source = await sourceTask.ConfigureAwait(false);
return(source.IsSuccess ? await projection(source.Value).ConfigureAwait(false) : Fallible <TResult> .Fail(source.Exception));
}
public static async Task <Fallible <TResult> > SelectAsync <TSource, TResult>(this Fallible <TSource> source, Func <TSource, Task <TResult> > projection)
{
return(source.IsSuccess ? await OperationAsync(() => projection(source.Value)).ConfigureAwait(false) : Fallible <TResult> .Fail(source.Exception));
}
public static Fallible <TResult> Select <TSource, TResult>(this Fallible <TSource> source, Func <TSource, Fallible <TResult> > projection)
{
return(source.IsSuccess ? projection(source.Value) : Fallible <TResult> .Fail(source.Exception));
}
public static Fallible <TDest> Cast <TSource, TDest>(this Fallible <TSource> source) where TDest : TSource
{
return(source.Select(value => Operation(() => (TDest)value)));
}
public static Fallible <T> Coalesce <T>(this Fallible <T> source, Func <Exception, Fallible <T> > projection)
{
return(source.IsSuccess ? source : projection(source.Exception));
}