// PRIVATE / PROTECTED METHODS //////////////////////
// When saving a UFlow state, number flows of the same type.
private string GetAddFlowID(Dictionary <string, List <UMachine> > flows, UMachine flow)
{
string flowID = flow?.FlowID;
if (string.IsNullOrEmpty(flowID) || !_flows.ContainsKey(flowID))
{
return(null);
}
if (!flows.ContainsKey(flowID))
{
flows.Add(flowID, new List <UMachine>()
{
flow
});
return(flowID + "#0");
}
int index = flows[flowID].IndexOf(flow);
if (index < 0)
{
index = flows[flowID].Count;
flows[flowID].Add(flow);
}
return(flowID + "#" + index);
}
public UMachine Invoke(string flowID, UMachine flow = null)
{
UMachine result = Instantiate(flowID, flow);
result?.OnEnter();
return(result);
}
void OnDestroy()
{
if (_machine != null)
{
_machine.Dispose();
}
_machine = null;
}
internal UController GetController(UMachine machine)
{
UController result;
while (machine._machine != null)
{
machine = machine._machine;
}
return(_controllers.TryGetValue(machine, out result) ? result : null);
}
internal void RemoveMachine(UMachine machine)
{
UController controller;
if (_controllers.TryGetValue(machine, out controller))
{
controller._machine = null;
_controllers.Remove(machine);
}
_active.Remove(machine);
}
private UMachine RestoreFlow(string[] state, Dictionary <string, UMachine> machines)
{
// Corrupted state; early out
int len = state?.Length ?? 0;
if (len < 1)
{
return(null);
}
DirectedGraph <UStateNode> graph;
string[] stateStr = state[0].Split('#');
// Couldn't find graph; early out
if (stateStr.Length < 1 || !_flows.TryGetValue(stateStr[0], out graph))
{
return(null);
}
string machineID = stateStr[0];
int[] init = new int[len - 1];
Dictionary <int, UMachine> subflows = new Dictionary <int, UMachine>();
UMachine machine;
UMachine result = Instantiate(machineID);
for (int i = 0; i < len - 1; ++i)
{
stateStr = state[i + 1].Split(':');
init[i] = int.Parse(stateStr[0]);
if (stateStr.Length > 1)
{
// subflows are states that contain other machines
// subflows need to be rebuilt before flows that depend on them
if (machines.TryGetValue(stateStr[1], out machine))
{
machine._Flow = result;
machine.ID = graph.Nodes[init[i]].ID;
subflows[init[i]] = machine;
}
else
{
return(null); // Not all machines instantiated; early out
}
}
}
if (result.RestoreStates(state, subflows))
{
return(result);
}
result.Dispose();
return(null);
}
public UMachine InvokeMachine(string machineID)
{
UStateNode <UMachine, string> node = new UStateNode <UMachine, string>();
node.Data = machineID;
UMachine mac = BuildMachine(node);
if (mac != null)
{
mac.OnEnterState();
}
return(mac);
}
public UMachine Instantiate(string flowID, UMachine flow = null)
{
if (!_flows.ContainsKey(flowID))
{
return(null);
}
UMachine result = new UMachine(this)
{
_Flow = flow
};
result.Initialize(flowID);
_active.Add(result);
return(result);
}
internal UMachine BuildMachine(UStateNode <UMachine, string> node)
{
UMachineGraph graph;
if (!_machines.TryGetValue(node.Data, out graph))
{
return(null);
}
UMachine mac = new UMachine();
mac.SetData(node.Data);
mac._graph = graph;
mac._uflow = this;
mac._node = node;
_active.Add(mac);
return(mac);
}
// Remove a machine from the active machines list. // Note that this does not fully dispose of the removed machine. internal void DectivateMachine(UMachine machine) => _active.Remove(machine);
public bool Exit(UMachine flow)
{
flow?.Exit();
return(flow != null);
}
internal virtual UState Instantiate(UMachine flow) => new UState()
{
ID = this.ID, _Flow = flow
};