Hi, thanks but my case is more complex than that, let me explain more precisely.
A clerk is assigned and have the choice to accept/decline; if he declines, we get back to assignment.
If he accept, he move to the room to be cleaned. Once moving, he can get something more urgent to do so he have the option to abandon the task, then we should reassign. If he continue, he begin cleaning room. Again, he can be interrupted and forced to abandon, in that case we should reassign the task to someone else again. The assignment logic should be in step1, other steps are human tasks. Here is an ascii schema:

Assign --> Accept/Decline --> Move/Abandon --> Clean/Abandon --> Finish
└------<-------┘
└---------------------<-------------┘
└-----------------------------------------<----------------┘

Is it possible to achieve this with workflow-core?

Thanks.

Hi.
I did not use the human tasks, but would try something like this:

class WorkflowData
{
	//...
	public bool IsFinished {get; set;} = false;
	//...
}


builder.StartWith(x => ExecutionResult.Next())
	.While(data => !data.IsFinished).Do(then => then
	    .StartWith<AssignClerk>()	    	
	    .Then<WaitForClerkConfirmation>()
	    
	    .When(d => true).Do(then => then
	    	.StartWith<MoveToRoom>()	    	
	    	.When(d => true).Do(t2 => t2
	    		.StartWith<Clean>()
	    			.Output(d => d.IsFinished, s => s.IsFinished)
	    	)
	    )

	)

try this(after commited, the indents disappeared, i don't konw why ):

builder .StartWith<Assignment>() .Id("Assignment") .WaitFor("ClerkReply", (data, context) => context.Workflow.Id, data => DateTime.Now) .Output(data => data.ClerkAccepted, step => step.EventData) .If(data => data.ClerkAccepted) .Do(wf => wf .StartWith(a => ExecutionResult.Next()) .WaitFor("ClearMovement", (data, context) => context.Workflow.Id, data => DateTime.Now) .Output(data=>data.ClerkMoved,step=>step.EventData) .If(data=>data.ClerkMoved) .Do(wf2=>wf2 .StartWith(a => ExecutionResult.Next()) .WaitFor("RoomCleaned", (data, context) => context.Workflow.Id, data => DateTime.Now) .Output(data=>data.RoomCleaned,step=>step.EventData) .If(data=>data.RoomCleaned) .Do(wf3=>wf3 .StartWith(a => ExecutionResult.Next()) .Then<Finish>()) .If(data=>data.RoomCleaned==false) .Do(wf3=>wf3 .StartWith(a => ExecutionResult.Next()) .Attach("Assignment")) ) .If(data => data.ClerkMoved == false) .Do(wf2 => wf2 .StartWith(a => ExecutionResult.Next()) .Attach("Assignment")) ) .If(data => data.ClerkAccepted == false) .Do(wf => wf .StartWith(a => ExecutionResult.Next()) .Attach("Assignment"));

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