forked from micromdm/micromdm
/
worker.go
119 lines (102 loc) · 2.6 KB
/
worker.go
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package user
import (
"context"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/pkg/errors"
uuid "github.com/satori/go.uuid"
"github.com/micromdm/micromdm/mdm"
"github.com/micromdm/micromdm/platform/pubsub"
)
type WorkerStore interface {
Save(*User) error
DeleteDeviceUsers(udid string) error
UserByUserID(userID string) (*User, error)
}
type Worker struct {
db WorkerStore
sub pubsub.Subscriber
logger log.Logger
}
func NewWorker(db WorkerStore, subscriber pubsub.Subscriber, logger log.Logger) *Worker {
return &Worker{
db: db,
sub: subscriber,
logger: logger,
}
}
func (w *Worker) Run(ctx context.Context) error {
const subscription = "user_worker"
tokenUpdateEvents, err := w.sub.Subscribe(ctx, subscription, mdm.TokenUpdateTopic)
if err != nil {
return errors.Wrapf(err, "subcribe %s to %s", subscription, mdm.TokenUpdateTopic)
}
for {
var err error
select {
case <-ctx.Done():
return ctx.Err()
case ev := <-tokenUpdateEvents:
err = w.updateUserFromTokenUpdate(ctx, ev.Message)
}
if err != nil {
level.Info(w.logger).Log(
"msg", "update user from event",
"err", err,
)
continue
}
}
}
func (w *Worker) updateUserFromTokenUpdate(ctx context.Context, message []byte) error {
var ev mdm.CheckinEvent
if err := mdm.UnmarshalCheckinEvent(message, &ev); err != nil {
return errors.Wrap(err, "unmarshal checkin event for user worker")
}
if ev.Command.UserID == "" {
// only process user events
return nil
}
usr, err := getOrCreateUser(w.db, ev.Command.UserID)
if err != nil {
return err
}
if usr.UUID == "" {
if err := w.db.DeleteDeviceUsers(ev.Command.UDID); err != nil {
return errors.Wrapf(
err,
"delete users for device %s before re-creating. user_id=%s",
ev.Command.UDID,
ev.Command.UserID,
)
}
usr.UUID = uuid.NewV4().String()
}
usr.UDID = ev.Command.UDID
usr.UserID = ev.Command.UserID
usr.UserLongname = ev.Command.UserLongName
usr.UserShortname = ev.Command.UserShortName
usr.AuthToken = ev.Command.Token.String()
err = w.db.Save(usr)
return errors.Wrapf(err, "saving user %s to device %s", ev.Command.UserID, ev.Command.UDID)
}
func getOrCreateUser(db WorkerStore, userID string) (*User, error) {
byGUID, err := db.UserByUserID(userID)
if err == nil {
return byGUID, nil
}
if err != nil && !isNotFound(err) {
return nil, errors.Wrap(err, "get user by ID")
}
usr := new(User)
return usr, nil
}
func isNotFound(err error) bool {
err = errors.Cause(err)
type notFoundErr interface {
error
NotFound() bool
}
e, ok := err.(notFoundErr)
return ok && e.NotFound()
}