public IEnumerable <WorkflowConnectionEntity> PreviousConnections(IWorkflowNodeEntity node)
{
return(PreviousGraph.RelatedTo(node).SelectMany(a => a.Value));
}
public List <string> Validate(Action <WorkflowGatewayEntity, WorkflowGatewayDirection> changeDirection)
{
List <string> errors = new List <string>();
if (Events.Count(a => a.Value.Type.IsStart()) == 0)
{
errors.Add(WorkflowValidationMessage.SomeStartEventIsRequired.NiceToString());
}
if (Workflow.MainEntityStrategy != WorkflowMainEntityStrategy.CreateNew)
{
if (Events.Count(a => a.Value.Type == WorkflowEventType.Start) == 0)
{
errors.Add(WorkflowValidationMessage.NormalStartEventIsRequiredWhenThe0Are1Or2.NiceToString(
Workflow.MainEntityStrategy.GetType().NiceName(),
WorkflowMainEntityStrategy.SelectByUser.NiceToString(),
WorkflowMainEntityStrategy.Both.NiceToString()));
}
}
if (Events.Count(a => a.Value.Type == WorkflowEventType.Start) > 1)
{
errors.Add(WorkflowValidationMessage.MultipleStartEventsAreNotAllowed.NiceToString());
}
var finishEventCount = Events.Count(a => a.Value.Type.IsFinish());
if (finishEventCount == 0)
{
errors.Add(WorkflowValidationMessage.FinishEventIsRequired.NiceToString());
}
Events.Values.ToList().ForEach(e =>
{
var fanIn = PreviousGraph.RelatedTo(e).Count;
var fanOut = NextGraph.RelatedTo(e).Count;
if (e.Type.IsStart())
{
if (fanIn > 0)
{
errors.Add(WorkflowValidationMessage._0HasInputs.NiceToString(e));
}
if (fanOut == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoOutputs.NiceToString(e));
}
if (fanOut > 1)
{
errors.Add(WorkflowValidationMessage._0HasMultipleOutputs.NiceToString(e));
}
if (fanOut == 1)
{
var nextConn = NextGraph.RelatedTo(e).Single().Value;
if (e.Type == WorkflowEventType.Start && !(nextConn.To is WorkflowActivityEntity))
{
errors.Add(WorkflowValidationMessage.StartEventNextNodeShouldBeAnActivity.NiceToString());
}
}
}
if (e.Type.IsFinish())
{
if (fanIn == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoInputs.NiceToString(e));
}
if (fanOut > 0)
{
errors.Add(WorkflowValidationMessage._0HasOutputs.NiceToString(e));
}
}
if (e.Type.IsTimerStart())
{
var schedule = e.ScheduledTask();
if (schedule == null)
{
errors.Add(WorkflowValidationMessage._0IsTimerStartAndSchedulerIsMandatory.NiceToString(e));
}
var wet = e.WorkflowEventTask();
if (wet == null)
{
errors.Add(WorkflowValidationMessage._0IsTimerStartAndTaskIsMandatory.NiceToString(e));
}
else if (wet.TriggeredOn != TriggeredOn.Always)
{
if (wet.Condition?.Script == null || !wet.Condition.Script.Trim().HasText())
{
errors.Add(WorkflowValidationMessage._0IsConditionalStartAndTaskConditionIsMandatory.NiceToString(e));
}
}
}
});
Gateways.Values.ToList().ForEach(g =>
{
var fanIn = PreviousGraph.RelatedTo(g).Count;
var fanOut = NextGraph.RelatedTo(g).Count;
if (fanIn == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoInputs.NiceToString(g));
}
if (fanOut == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoOutputs.NiceToString(g));
}
if (fanIn == 1 && fanOut == 1)
{
errors.Add(WorkflowValidationMessage._0HasJustOneInputAndOneOutput.NiceToString(g));
}
var newDirection = fanOut == 1 ? WorkflowGatewayDirection.Join : WorkflowGatewayDirection.Split;
if (g.Direction != newDirection)
{
changeDirection(g, newDirection);
}
if (g.Direction == WorkflowGatewayDirection.Split)
{
if (g.Type == WorkflowGatewayType.Exclusive || g.Type == WorkflowGatewayType.Inclusive)
{
if (NextGraph.RelatedTo(g).OrderByDescending(a => a.Value.Order).Any(c => c.Value.DecisonResult != null))
{
List <WorkflowActivityEntity> previousActivities = new List <WorkflowActivityEntity>();
PreviousGraph.DepthExploreConnections(g, (prev, conn, next) =>
{
if (next is WorkflowActivityEntity a)
{
previousActivities.Add(a);
return(false);
}
return(true);
});
foreach (var act in previousActivities.Where(a => a.Type != WorkflowActivityType.Decision))
{
errors.Add(WorkflowValidationMessage.Activity0ShouldBeDecision.NiceToString(act));
}
}
}
if (g.Type == WorkflowGatewayType.Exclusive && NextGraph.RelatedTo(g).OrderByDescending(a => a.Value.Order).Skip(1).Any(c => c.Value.DecisonResult == null && c.Value.Condition == null))
{
errors.Add(WorkflowValidationMessage.Gateway0ShouldHasConditionOrDecisionOnEachOutputExceptTheLast.NiceToString(g));
}
if (g.Type == WorkflowGatewayType.Inclusive && NextGraph.RelatedTo(g).Any(c => c.Value.DecisonResult == null && c.Value.Condition == null))
{
errors.Add(WorkflowValidationMessage.Gateway0ShouldHasConditionOnEachOutput.NiceToString(g));
}
}
});
var starts = Events.Values.Where(a => a.Type.IsStart()).ToList();
TrackId = starts.ToDictionary(a => (IWorkflowNodeEntity)a, a => 0);
TrackCreatedBy = new Dictionary <int, WorkflowGatewayEntity> {
{ 0, null }
};
ParallelWorkflowPairs = new Dictionary <WorkflowGatewayEntity, WorkflowGatewayEntity>();
starts.ForEach(st =>
NextGraph.BreadthExploreConnections(st,
(prev, conn, next) =>
{
var prevTrackId = TrackId.GetOrThrow(prev);
int newTrackId;
if (IsParallelGateway(prev, WorkflowGatewayDirection.Split))
{
if (IsParallelGateway(next, WorkflowGatewayDirection.Join))
{
newTrackId = prevTrackId;
}
else
{
newTrackId = TrackCreatedBy.Count + 1;
TrackCreatedBy.Add(newTrackId, (WorkflowGatewayEntity)prev);
}
}
else
{
if (IsParallelGateway(next, WorkflowGatewayDirection.Join))
{
var split = TrackCreatedBy.TryGetC(prevTrackId);
if (split == null)
{
errors.Add(WorkflowValidationMessage._0CanNotBeConnectedToAParallelJoinBecauseHasNoPreviousParallelSplit.NiceToString(prev));
return(false);
}
ParallelWorkflowPairs[split] = (WorkflowGatewayEntity)next;
newTrackId = TrackId.GetOrThrow(split);
}
else
{
newTrackId = prevTrackId;
}
}
if (TrackId.ContainsKey(next))
{
if (TrackId[next] != newTrackId)
{
errors.Add(WorkflowValidationMessage._0Track1CanNotBeConnectedTo2Track3InsteadOfTrack4.NiceToString(prev, prevTrackId, next, TrackId[next], newTrackId));
}
return(false);
}
else
{
TrackId[next] = newTrackId;
return(true);
}
})
);
Action <WorkflowActivityEntity, IWorkflowTransitionTo> ValidateTransition = (WorkflowActivityEntity wa, IWorkflowTransitionTo item) =>
{
var activity0CanNotXTo1Because2 = (item is WorkflowJumpEmbedded || item is WorkflowScriptPartEmbedded) ?
WorkflowValidationMessage.Activity0CanNotJumpTo1Because2 :
WorkflowValidationMessage.Activity0CanNotTimeoutTo1Because2;
var to =
item.To is Lite <WorkflowActivityEntity>?(IWorkflowNodeEntity)Activities.TryGetC((Lite <WorkflowActivityEntity>)item.To) :
item.To is Lite <WorkflowGatewayEntity>?(IWorkflowNodeEntity)Gateways.TryGetC((Lite <WorkflowGatewayEntity>)item.To) :
item.To is Lite <WorkflowEventEntity>?(IWorkflowNodeEntity)Events.TryGetC((Lite <WorkflowEventEntity>)item.To) : null;
if (to == null)
{
errors.Add(activity0CanNotXTo1Because2.NiceToString(wa, item.To, WorkflowValidationMessage.IsNotInWorkflow.NiceToString()));
}
if (to is WorkflowEventEntity && ((WorkflowEventEntity)to).Type.IsStart())
{
errors.Add(activity0CanNotXTo1Because2.NiceToString(wa, item.To, WorkflowValidationMessage.IsStart.NiceToString()));
}
if (to is WorkflowActivityEntity && to == wa)
{
errors.Add(activity0CanNotXTo1Because2.NiceToString(wa, item.To, WorkflowValidationMessage.IsSelfJumping.NiceToString()));
}
if (TrackId.GetOrThrow(to) != TrackId.GetOrThrow(wa))
{
errors.Add(activity0CanNotXTo1Because2.NiceToString(wa, item.To, WorkflowValidationMessage.IsInDifferentParallelTrack.NiceToString()));
}
};
foreach (var wa in Activities.Values)
{
var fanIn = PreviousGraph.RelatedTo(wa).Count;
var fanOut = NextGraph.RelatedTo(wa).Count;
if (fanIn == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoInputs.NiceToString(wa));
}
if (fanOut == 0)
{
errors.Add(WorkflowValidationMessage._0HasNoOutputs.NiceToString(wa));
}
if (fanOut > 1)
{
errors.Add(WorkflowValidationMessage._0HasMultipleOutputs.NiceToString(wa));
}
if (fanOut == 1 && wa.Type == WorkflowActivityType.Decision)
{
var nextConn = NextGraph.RelatedTo(wa).Single().Value;
if (!(nextConn.To is WorkflowGatewayEntity) || ((WorkflowGatewayEntity)nextConn.To).Type == WorkflowGatewayType.Parallel)
{
errors.Add(WorkflowValidationMessage.Activity0WithDecisionTypeShouldGoToAnExclusiveOrInclusiveGateways.NiceToString(wa));
}
}
if (wa.Reject != null)
{
var prevs = PreviousGraph.IndirectlyRelatedTo(wa, kvp => !(kvp.Key is WorkflowActivityEntity));
if (prevs.Any(a => a is WorkflowEventEntity && ((WorkflowEventEntity)a).Type.IsStart()))
{
errors.Add(WorkflowValidationMessage.Activity0CanNotRejectToStart.NiceToString(wa));
}
if (prevs.Any(a => IsParallelGateway(a)))
{
errors.Add(WorkflowValidationMessage.Activity0CanNotRejectToParallelGateway.NiceToString(wa));
}
}
if (wa.Timeout != null)
{
ValidateTransition(wa, wa.Timeout);
}
if (wa.Script != null)
{
ValidateTransition(wa, wa.Script);
}
foreach (var item in wa.Jumps)
{
ValidateTransition(wa, item);
}
}
if (errors.HasItems())
{
this.TrackCreatedBy = null;
this.TrackId = null;
this.ParallelWorkflowPairs = null;
}
return(errors);
}