public static Promise <TResult> Select <TResult>(
this Promise source, Func <object, TResult> selector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
return(source.Then((result, s) => selector(null)));
}
public static Promise <TResult> SelectMany <TSource, TResult>(
this Promise <TSource> source, Func <TSource, Promise <TResult> > selector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
return(source.Then((result, s) => selector(result)));
}
public static Promise <T> Unwrap <T>(this Promise <Promise <T> > pipe)
{
if (pipe == null)
{
return(null);
}
return(new Promise <T>(pipe.CancelMode, (resolve, reject, onCancel) =>
{
onCancel(pipe.Cancel);
pipe.Then((inner, s) => inner.Then((r, ss) => resolve(r, s && ss),
(ex, ss) => reject(ex, s & ss))
.Cancelled(ex => reject(ex, s)), reject)
.Cancelled(ex => reject(ex, true));
}));
}
public static Promise <TSource> Where <TSource>(
this Promise <TSource> source, Func <TSource, bool> predicate)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
return(source.Then((result, s) => {
if (predicate(result))
{
return result;
}
throw new CancelledException();
}));
}
public static Promise <TResult> SelectMany <TSource, TCollection, TResult>(
this Promise <TSource> source,
Func <TSource, Promise <TCollection> > collectionSelector,
Func <TSource, TCollection, TResult> resultSelector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (collectionSelector == null)
{
throw new ArgumentNullException(nameof(collectionSelector));
}
if (resultSelector == null)
{
throw new ArgumentNullException(nameof(resultSelector));
}
return(source.Then((result, s) => collectionSelector(result)
.Then((collection, ss) => resultSelector(result, collection))));
}
public static Promise <TResult> GroupJoin <TOuter, TInner, TKey, TResult>(
this Promise <TOuter> outer, Promise <TInner> inner,
Func <TOuter, TKey> outerKeySelector,
Func <TInner, TKey> innerKeySelector,
Func <TOuter, Promise <TInner>, TResult> resultSelector,
IEqualityComparer <TKey> comparer)
{
if (outer == null)
{
throw new ArgumentNullException(nameof(outer));
}
if (inner == null)
{
throw new ArgumentNullException(nameof(inner));
}
if (outerKeySelector == null)
{
throw new ArgumentNullException(nameof(outerKeySelector));
}
if (innerKeySelector == null)
{
throw new ArgumentNullException(nameof(innerKeySelector));
}
if (resultSelector == null)
{
throw new ArgumentNullException(nameof(resultSelector));
}
if (comparer == null)
{
throw new ArgumentNullException(nameof(comparer));
}
return(outer.Then((outResult, s) => inner.Then((inResult, ss) => {
if (comparer.Equals(outerKeySelector(outResult), innerKeySelector(inResult)))
{
return resultSelector(outResult, inner);
}
throw new CancelledException();
})));
}
public static Promise <T> Resolved <T>(Promise <T> promise)
{
return(new Promise <T>((resolve, reject) => promise.Then(resolve, reject)));
}
public static Promise <object> Resolved(Promise promise)
{
return(new Promise <object>((resolve, reject) =>
promise.Then((r, s) => resolve(r, s), reject)));
}
