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// Copyright 2023 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package subsystem
import (
"fmt"
)
type Service struct {
*Extractor
Revision int
perName map[string]*Subsystem
perParent map[*Subsystem][]*Subsystem
}
func MustMakeService(list []*Subsystem, revision int) *Service {
service, err := MakeService(list, revision)
if err != nil {
panic(fmt.Sprintf("service creation failed: %s", err))
}
return service
}
func MakeService(list []*Subsystem, revision int) (*Service, error) {
extractor := MakeExtractor(list)
perName := map[string]*Subsystem{}
perParent := map[*Subsystem][]*Subsystem{}
for _, item := range list {
if item.Name == "" {
return nil, fmt.Errorf("input contains a subsystem without a name")
}
if perName[item.Name] != nil {
return nil, fmt.Errorf("collision on %#v name", item.Name)
}
perName[item.Name] = item
for _, p := range item.Parents {
perParent[p] = append(perParent[p], item)
}
}
return &Service{
Extractor: extractor,
Revision: revision,
perName: perName,
perParent: perParent,
}, nil
}
func (s *Service) ByName(name string) *Subsystem {
return s.perName[name]
}
func (s *Service) List() []*Subsystem {
ret := []*Subsystem{}
for _, item := range s.perName {
ret = append(ret, item)
}
return ret
}
func (s *Service) Children(parent *Subsystem) []*Subsystem {
return append([]*Subsystem{}, s.perParent[parent]...)
}
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