//removeFromTable removes node n and return true if exists.
//or returns false if not exists.
func removeFromTable(tx *bolt.Tx, datfile string, n *node.Node) error {
if n == nil {
err := errors.New("n is nil")
log.Println(err)
return err
}
if !db.HasVal(tx, "lookupT", []byte(datfile), n.Nodestr) {
return errors.New("no node")
}
err := db.DelMap(tx, "lookupT", []byte(datfile), n.Nodestr)
if err != nil {
return err
}
return db.DelMap(tx, "lookupA", []byte(n.Nodestr), datfile)
}
//Set remove all tags and saves tag strings.
func Set(thread string, tag []string) {
err := db.DB.Update(func(tx *bolt.Tx) error {
ts, err := db.GetMap(tx, "usertag", []byte(thread))
if err != nil {
log.Println(err)
}
for t := range ts {
err = db.DelMap(tx, "usertagTag", []byte(t), thread)
if err != nil {
return err
}
}
if err := db.Del(tx, "usertag", []byte(thread)); err != nil {
log.Println(err)
}
return AddTX(tx, thread, tag)
})
if err != nil {
log.Print(err)
}
}
//RemoveFromAllTable removes node n from all tables and return true if exists.
//or returns false if not exists.
func RemoveFromAllTable(n *node.Node) bool {
err := db.DB.Update(func(tx *bolt.Tx) error {
threads, err := db.GetMap(tx, "lookupA", []byte(n.Nodestr))
if err != nil {
return err
}
err = db.Del(tx, "lookupA", []byte(n.Nodestr))
if err != nil {
return err
}
for t := range threads {
err := db.DelMap(tx, "lookupT", []byte(t), n.Nodestr)
if err != nil {
return err
}
}
return nil
})
if err != nil {
log.Println(err)
return false
}
return true
}