//HasTagstr return true if one of tags has tagstr
func HasTagstr(datfile string, tagstr string) bool {
var r bool
err := db.DB.View(func(tx *bolt.Tx) error {
r = db.HasVal(tx, "sugtag", []byte(datfile), tagstr)
return nil
})
if err != nil {
log.Println(err)
}
return r
}
//hasNodeInTable returns true if nodelist has n.
func hasNodeInTable(datfile string, n *node.Node) bool {
var r bool
err := db.DB.View(func(tx *bolt.Tx) error {
r = db.HasVal(tx, "lookupT", []byte(datfile), n.Nodestr)
return nil
})
if err != nil {
log.Println(err)
}
return r
}
//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)
}
//Has returns true if thread has the tag.
func Has(thread string, tag ...string) bool {
rr := false
err := db.DB.View(func(tx *bolt.Tx) error {
for _, t := range tag {
if db.HasVal(tx, "usertag", []byte(thread), t) {
rr = true
return nil
}
}
return nil
})
if err != nil {
log.Println(err)
}
return rr
}