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x) Big FSM refactor

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This commit is contained in:
Marc Hernandez 2024-04-09 17:15:59 -07:00
parent e656e46e7c
commit 1a05f3b2b9
1 changed files with 27 additions and 10 deletions
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37
imm/FSM.cs
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@ -13,7 +13,7 @@ public record class Context : imm.Recorded<Context>
}
public record class State<T, CTX> : imm.Recorded<State<T, CTX>>
public record class State<T, CTX>( CTX Context ) : imm.Recorded<State<T, CTX>>
where T : State<T, CTX>
where CTX : Context
{
@ -30,13 +30,13 @@ public record class State<T, CTX> : imm.Recorded<State<T, CTX>>
public record class FSM<T, CTX, ST> : imm.Recorded<FSM<T, CTX, ST>>
where T : FSM<T, CTX, ST>
where CTX : Context
public record class FSM<T, ST, CTX> : imm.Recorded<FSM<T, ST, CTX>>
where T : FSM<T, ST, CTX>
where ST : State<ST, CTX>
where CTX : Context
{
public CTX Context { get; private set; }
public ST State { get; private set; }
public CTX Context { get; init; }
public ST State { get; init; }
public FSM( CTX context, ST stStart )
{
@ -44,20 +44,37 @@ public record class FSM<T, CTX, ST> : imm.Recorded<FSM<T, CTX, ST>>
State = stStart;
}
public FSM<T, CTX, ST> Transition(ST newState)
public FSM<T, ST, CTX> Transition(ST newState)
{
var (newOldCTX, oldState) = State.onExit(Context, newState);
var origState = State;
var (newOldCTX, oldState) = State.onExit(Context, newState);
var (newCTX, storeState) = newState.onEnter(newOldCTX, oldState);
return this with
var newFSM = this.Process( this with
{
Context = newCTX,
State = storeState,
};
}, $"Trans: {origState.GetType().Name} to {newState.GetType().Name}" );
return newFSM;
}
public FSM<T, ST, CTX> Process( Func<ST, ST> fn, string reason )
{
var newState = fn( State );
if( object.ReferenceEquals( newState, State ) ) return this;
FSM<T, ST, CTX> newFSM = this.Process( this with
{
Context = Context,
State = newState,
}, $"Processing: {newState.GetType().Name} for {reason}" );
return newFSM;
}
}