/*

* === This file is part of ALICE O² ===

*

* Copyright 2019 CERN and copyright holders of ALICE O².

* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*

* In applying this license CERN does not waive the privileges and

* immunities granted to it by virtue of its status as an

* Intergovernmental Organization or submit itself to any jurisdiction.

*/

package state

import (

"fmt"

"strings"

)

type State interface {

fmt.Stringer

IsStable() bool // we accept transitions

GetComponents() []Component

}

type MultiState struct {

Component Component

SubState State

}

func (s *MultiState) String() string {

if s == nil {

return UNKNOWN.String()

}

return s.Component.String() + "." + s.SubState.String()

}

func (s *MultiState) GetComponents() (c []Component) {

if s == nil {

return

}

c = append([]Component{s.Component}, s.SubState.GetComponents()...)

return

}

func (s *MultiState) IsStable() bool {

if s == nil {

return false

}

comp := s.GetComponents()

last := comp[len(comp)-1]

return !strings.HasSuffix(last.String(), "ING")

}