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package k9p
import (
"context"
"runtime"
"sync"
"github.com/docker/go-p9p"
"go.terinstock.com/k9p/pkg/resources"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
)
type Session struct {
sync.Mutex
aname string
uname string
client kubernetes.Interface
sharedInformer informers.SharedInformerFactory
refs map[p9p.Fid]resources.Ref
}
func New(ctx context.Context, client kubernetes.Interface) *Session {
sharedInformer := informers.NewSharedInformerFactory(client, 0)
sharedInformer.Core().V1().Namespaces().Informer()
sharedInformer.Apps().V1().Deployments().Informer()
go sharedInformer.Start(ctx.Done())
runtime.Gosched()
return &Session{
client: client,
sharedInformer: sharedInformer,
refs: make(map[p9p.Fid]resources.Ref),
}
}
func (k *Session) getRef(fid p9p.Fid) (resources.Ref, error) {
k.Lock()
defer k.Unlock()
if fid == p9p.NOFID {
return nil, p9p.ErrUnknownfid
}
ref, found := k.refs[fid]
if !found {
return nil, p9p.ErrUnknownfid
}
return ref, nil
}
func (k *Session) newRef(fid p9p.Fid, resource resources.Ref) (resources.Ref, error) {
k.Lock()
defer k.Unlock()
if fid == p9p.NOFID {
return nil, p9p.ErrUnknownfid
}
_, ok := k.refs[fid]
if ok {
return nil, p9p.ErrDupfid
}
ref := resource
k.refs[fid] = ref
return ref, nil
}
func (k *Session) Auth(ctx context.Context, afid p9p.Fid, uname string, aname string) (p9p.Qid, error) {
return p9p.Qid{}, nil
}
func (k *Session) Attach(ctx context.Context, fid p9p.Fid, afid p9p.Fid, uname string, aname string) (p9p.Qid, error) {
if uname == "" {
return p9p.Qid{}, p9p.MessageRerror{Ename: "no user"}
}
if aname == "" {
aname = "/"
}
k.uname = uname
k.aname = aname
ref, err := k.newRef(fid, resources.NewDirRef("/", k, map[string]resources.Ref{
"namespaces": resources.NewNamespacesRef(k.client, k),
"cluster": resources.NewDirRef("cluster", k, map[string]resources.Ref{}),
}))
if err != nil {
return p9p.Qid{}, err
}
return ref.Info().Qid, nil
}
func (k *Session) Clunk(ctx context.Context, fid p9p.Fid) error {
_, err := k.getRef(fid)
if err != nil {
return err
}
k.Lock()
defer k.Unlock()
delete(k.refs, fid)
return nil
}
func (k *Session) Remove(ctx context.Context, fid p9p.Fid) error {
return p9p.ErrUnknownMsg
}
func (k *Session) Walk(ctx context.Context, fid p9p.Fid, newfid p9p.Fid, names ...string) ([]p9p.Qid, error) {
var qids []p9p.Qid
ref, err := k.getRef(fid)
if err != nil {
return qids, err
}
current := ref
for _, name := range names {
newResource, err := current.Get(name)
if err != nil {
break
}
qids = append(qids, newResource.Info().Qid)
current = newResource
}
if len(qids) != len(names) {
return qids, nil
}
_, err = k.newRef(newfid, current)
if err != nil {
return qids, err
}
return qids, nil
}
func (k *Session) Read(ctx context.Context, fid p9p.Fid, p []byte, offset int64) (n int, err error) {
ref, err := k.getRef(fid)
if err != nil {
return 0, err
}
return ref.Read(ctx, p, offset)
}
func (k *Session) Write(ctx context.Context, fid p9p.Fid, p []byte, offset int64) (n int, err error) {
return 0, p9p.ErrUnknownMsg
}
func (k *Session) Open(ctx context.Context, fid p9p.Fid, mode p9p.Flag) (p9p.Qid, uint32, error) {
ref, err := k.getRef(fid)
if err != nil {
return p9p.Qid{}, 0, err
}
return ref.Info().Qid, 0, nil
}
func (k *Session) Create(ctx context.Context, parent p9p.Fid, name string, perm uint32, mode p9p.Flag) (p9p.Qid, uint32, error) {
return p9p.Qid{}, 0, p9p.ErrUnknownMsg
}
func (k *Session) Stat(ctx context.Context, fid p9p.Fid) (p9p.Dir, error) {
ref, err := k.getRef(fid)
if err != nil {
return p9p.Dir{}, err
}
return ref.Info(), nil
}
func (k *Session) WStat(ctx context.Context, fid p9p.Fid, dir p9p.Dir) error {
return p9p.ErrUnknownMsg
}
// Version returns the supported version and msize of the session. This
// can be affected by negotiating or the level of support provided by the
// session implementation.
func (k *Session) Version() (msize int, version string) {
return p9p.DefaultMSize, p9p.DefaultVersion
}
func (k *Session) WaitForCacheSync(stopCh <-chan struct{}) {
k.sharedInformer.WaitForCacheSync(stopCh)
}
func (k *Session) GetAuth() (uname, aname string) {
return k.uname, k.aname
}
func (k *Session) Informer() informers.SharedInformerFactory {
return k.sharedInformer
}
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