more refactor

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

internal/outpost/radius/eap/protocol/state.go

@@ -0,0 +1,42 @@
+package protocol
+
+import (
+	"errors"
+	"slices"
+)
+
+type StateManager interface {
+	GetEAPSettings() Settings
+	GetEAPState(string) *State
+	SetEAPState(string, *State)
+}
+
+type ProtocolConstructor func() Payload
+
+type Settings struct {
+	Protocols        []ProtocolConstructor
+	ProtocolPriority []Type
+	ProtocolSettings map[Type]interface{}
+}
+
+type State struct {
+	Protocols        []ProtocolConstructor
+	ProtocolIndex    int
+	ProtocolPriority []Type
+	TypeState        map[Type]any
+}
+
+func (st *State) GetNextProtocol() (Type, error) {
+	if st.ProtocolIndex >= len(st.ProtocolPriority) {
+		return Type(0), errors.New("no more protocols to offer")
+	}
+	return st.ProtocolPriority[st.ProtocolIndex], nil
+}
+
+func BlankState(settings Settings) *State {
+	return &State{
+		Protocols:        slices.Clone(settings.Protocols),
+		ProtocolPriority: slices.Clone(settings.ProtocolPriority),
+		TypeState:        map[Type]any{},
+	}
+}