/// <summary>
/// Starts the given Action when one task has not successfully ended
/// </summary>
/// <param name="that">The that.</param>
/// <param name="action">The action to start.</param>
/// <param name="target">The DispatcherBase to start the following action on.</param>
/// <returns>
/// The tasks.
/// </returns>
public static IEnumerable <CustomTask> WhenFailed(this IEnumerable <CustomTask> that, Action action,
CustomTaskDispatcherBase target)
{
var hasFailed = false;
var syncRoot = new object();
foreach (var task in that)
{
task.WhenFailed(() =>
{
lock (syncRoot)
{
if (hasFailed)
{
return;
}
hasFailed = true;
if (target == null)
{
action();
}
else
{
target.Dispatch(action);
}
}
});
}
return(that);
}
/// <summary>
/// The given Action will be performed when the task succeeds.
/// </summary>
/// <param name="task">The task.</param>
/// <param name="action">The action to perform.</param>
/// <param name="actionTarget">The action target.</param>
/// <returns>
/// This task.
/// </returns>
public static CustomTask WhenSucceeded(this CustomTask task, Action <CustomTask> action,
CustomTaskDispatcherBase actionTarget)
{
Action <CustomTask> perform = t =>
{
if (actionTarget == null)
{
action(t);
}
else
{
actionTarget.Dispatch(() => { if (t.IsSucceeded)
{
action(t);
}
});
}
};
return(task.WhenEnded(t => { if (t.IsSucceeded)
{
perform(t);
}
}, null));
}
/// <summary>
/// Starts the given Action when all Tasks ended successfully.
/// </summary>
/// <param name="that">The that.</param>
/// <param name="action">The action to start.</param>
/// <param name="target">The DispatcherBase to start the following action on.</param>
/// <returns>
/// The tasks.
/// </returns>
public static IEnumerable <CustomTask> WhenSucceeded(this IEnumerable <CustomTask> that, Action action,
CustomTaskDispatcherBase target)
{
var remaining = that.Count();
var syncRoot = new object();
foreach (var task in that)
{
task.WhenSucceeded(() =>
{
lock (syncRoot)
{
remaining--;
if (remaining != 0)
{
return;
}
if (target == null)
{
action();
}
else
{
target.Dispatch(action);
}
}
});
}
return(that);
}
/// <summary>
/// The given Action will be performed when the task ends.
/// </summary>
/// <param name="task">The task.</param>
/// <param name="action">The action to perform.</param>
/// <param name="target">The DispatcherBase to perform the action on.</param>
/// <returns>
/// This task.
/// </returns>
public static CustomTask WhenEnded(this CustomTask task, Action <CustomTask> action, CustomTaskDispatcherBase target)
{
task.TaskEnded += (t) =>
{
if (target == null)
{
action(task);
}
else
{
target.Dispatch(() => action(task));
}
};
return(task);
}