public static IEnumerableAsync <T> OnCompleteAsync <T>(this IEnumerableAsync <T> enumerableAsync,
Func <T[], Task> onComplete,
ILogger logger = default(ILogger))
{
var scopedLogger = logger.CreateScope("OnCompleteAsync");
var enumerator = enumerableAsync.GetEnumerator();
var stack = new Stack <T>();
return(EnumerableAsync.Yield <T>(
async(next, last) =>
{
scopedLogger.Trace("MoveNextAsync.");
if (await enumerator.MoveNextAsync())
{
var current = enumerator.Current;
scopedLogger.Trace("Passthrough on value.");
stack.Push(current);
return next(current);
}
var allValues = stack.ToArray();
scopedLogger.Trace($"Accumulated `{allValues.Length}` Values.");
await onComplete(allValues);
scopedLogger.Trace($"Complete.");
return last;
}));
}
public static IEnumerableAsync <T> OnComplete <T>(this IEnumerableAsync <T> enumerableAsync,
Action <T[]> onComplete,
EastFive.Analytics.ILogger logger = default(ILogger))
{
var enumerator = enumerableAsync.GetEnumerator();
var stack = new Stack <T>();
return(EnumerableAsync.Yield <T>(
async(next, last) =>
{
//if (!tag.IsNullOrWhiteSpace())
// Console.WriteLine($"Join[{tag}] MoveNextAsync.");
if (await enumerator.MoveNextAsync())
{
var current = enumerator.Current;
//if (!tag.IsNullOrWhiteSpace())
// Console.WriteLine($"Join[{tag}] Passthrough on value.");
stack.Push(current);
return next(current);
}
var allValues = stack.ToArray();
if (!logger.IsDefaultOrNull())
{
Console.WriteLine($"OnComplete Accumulated `{allValues.Length}` Values.");
}
onComplete(allValues);
if (!logger.IsDefaultOrNull())
{
Console.WriteLine($"OnComplete Complete.");
}
return last;
}));
}
public static IEnumerableAsync <T> OnCompleteJoin <T>(this IEnumerableAsync <T> enumerableAsync,
Func <T[], IEnumerableAsync <T> > onComplete)
{
var enumerator = enumerableAsync.GetEnumerator();
var stack = new Stack <T>();
var called = false;
return(EnumerableAsync.Yield <T>(
async(next, last) =>
{
if (!called)
{
if (await enumerator.MoveNextAsync())
{
var current = enumerator.Current;
stack.Push(current);
return next(current);
}
var allValues = stack.ToArray();
var completeItems = onComplete(allValues);
called = true;
enumerator = completeItems.GetEnumerator();
}
if (await enumerator.MoveNextAsync())
{
var current = enumerator.Current;
return next(current);
}
return last;
}));
}
public static IEnumerableAsync <T> JoinTask <T>(this IEnumerableAsync <T> enumerableAsync,
Task task,
EastFive.Analytics.ILogger logger = default(ILogger))
{
var scopedLogger = logger.CreateScope($"Join[{task.Id}]");
var enumerator = enumerableAsync.GetEnumerator();
return(EnumerableAsync.Yield <T>(
async(next, last) =>
{
//if (!tag.IsNullOrWhiteSpace())
// Console.WriteLine($"Join[{tag}] MoveNextAsync.");
if (await enumerator.MoveNextAsync())
{
//if (!tag.IsNullOrWhiteSpace())
// Console.WriteLine($"Join[{tag}] Passthrough on value.");
return next(enumerator.Current);
}
scopedLogger.Trace($"Joining Task.");
await task;
scopedLogger.Trace($"Complete.");
return last;
}));
}
public static IEnumerableAsync <TSelect> SelectAsyncOptional <TItem, TSelect>(this IEnumerableAsync <TItem> enumerable,
Func <TItem, Func <TSelect, ISelectionResult <TSelect> >, Func <ISelectionResult <TSelect> >, Task <ISelectionResult <TSelect> > > selection)
{
var enumerator = enumerable.GetEnumerator();
var selections = EnumerableAsync.Yield <TSelect>(
async(yieldAsync, yieldBreak) =>
{
while (true)
{
if (!await enumerator.MoveNextAsync())
{
return(yieldBreak);
}
var item = enumerator.Current;
var selectionResult = await selection(item,
(selected) =>
{
return(new Selection <TSelect>(selected));
},
() =>
{
return(new SelectionSkipped <TSelect>());
});
if (selectionResult.HasValue)
{
return(yieldAsync(selectionResult.Value));
}
}
});
return(selections);
}
public static async Task <TResult> SelectOptionalAsync <TItem, TSelect, TCarry, TResult>(this IEnumerableAsync <TItem> enumerable,
TCarry carry,
Func <TItem, TCarry, Func <TSelect, TCarry, ISelectionResult <TSelect> >, Func <TCarry, ISelectionResult <TSelect> >, Task <ISelectionResult <TSelect> > > selectionAsync,
Func <TSelect[], TCarry, TResult> aggregation)
{
var enumerator = enumerable.GetEnumerator();
var selecteds = default(IEnumerableAsync <TSelect>);
// var completedEvent = new System.Threading.ManualResetEvent(false);
selecteds = EnumerableAsync.Yield <TSelect>(
async(yieldReturn, yieldBreak) =>
{
while (true)
{
if (!await enumerator.MoveNextAsync())
{
return(yieldBreak);
}
var yieldResult = await selectionAsync(enumerator.Current, carry,
(selected, carryUpdated) =>
{
carry = carryUpdated;
return(new Selection <TSelect>(selected));
},
(carryUpdated) =>
{
carry = carryUpdated;
return(new SelectionSkipped <TSelect>());
});
if (yieldResult.HasValue)
{
return(yieldReturn(yieldResult.Value));
}
}
});
var selectedResults = (await selecteds.Async()).ToArray();
var aggregated = aggregation(selectedResults, carry);
return(aggregated);
}
public IEnumeratorAsync <KeyValuePair <TKey, TValue> > GetEnumerator()
{
KeyValuePair <TKey, TValue>[] dictionaryKvps;
lock (dictionary)
{
dictionaryKvps = dictionary.ToArray();
}
var dictionaryKvpsIndex = 0;
var kvps = EnumerableAsync.Yield <KeyValuePair <TKey, TValue> >(
async(yieldReturn, yieldBreak) =>
{
if (dictionaryKvpsIndex < dictionaryKvps.Length)
{
dictionaryKvpsIndex = dictionaryKvpsIndex + 1;
var kvp = dictionaryKvps[dictionaryKvpsIndex];
return(yieldReturn(kvp));
}
return(await yieldBreak.AsTask());
});
return(kvps.GetEnumerator());
}
public static TResult SelectOptional <TItem, TSelect, TCarry, TResult>(this IEnumerableAsync <TItem> enumerable,
TCarry carry,
Func <TItem, TCarry, Func <TSelect, TCarry, TResult>, Func <TCarry, TResult>, TResult> selection,
Func <IEnumerableAsync <TSelect>, TCarry, TResult> aggregation)
{
var enumerator = enumerable.GetEnumerator();
var selecteds = default(IEnumerableAsync <TSelect>);
TResult aggregated = default(TResult);
var completedEvent = new System.Threading.AutoResetEvent(false);
selecteds = EnumerableAsync.Yield <TSelect>(
async(yieldReturn, yieldBreak) =>
{
if (!await enumerator.MoveNextAsync())
{
return(yieldBreak);
}
var yieldResult = default(IYieldResult <TSelect>);
var discard = selection(enumerator.Current, carry,
(selected, carryUpdated) =>
{
yieldResult = yieldReturn(selected);
completedEvent.WaitOne();
return(aggregated);
},
(carryUpdated) =>
{
completedEvent.WaitOne();
return(aggregated);
});
return(yieldResult);
});
aggregated = aggregation(selecteds, carry);
completedEvent.Set();
return(aggregated);
}
public static IEnumerableAsync <T> OnCompleteAsyncAppend <T>(this IEnumerableAsync <T> enumerableAsync,
Func <T[], Task <T[]> > onComplete)
{
var enumerator = enumerableAsync.GetEnumerator();
var stack = new Stack <T>();
var called = false;
var completeItemsIndex = 0;
var completeItems = default(T[]);
return(EnumerableAsync.Yield <T>(
async(next, last) =>
{
if (!called)
{
if (await enumerator.MoveNextAsync())
{
var current = enumerator.Current;
stack.Push(current);
return next(current);
}
var allValues = stack.ToArray();
completeItems = await onComplete(allValues);
called = true;
}
if (completeItemsIndex < completeItems.Length)
{
var current = completeItems[completeItemsIndex];
completeItemsIndex++;
return next(current);
}
return last;
}));
}