added prefix scan and fixed logout issue

pkg/store/boltstore.go

@@ -119,6 +119,15 @@ func (bs *BoltStore) ForEach(f func(string, []byte) error) error {
 	})
 }
 
+func (bs *BoltStore) ForEachPrefix(prefix string, f func(string, []byte) error) error {
+	return bs.ForEach(func(k string, v []byte) error {
+		if trim, ok := hasTrimPrefix(k, prefix); ok {
+			return f(trim, v)
+		}
+		return nil
+	})
+}
+
 func (bs *BoltStore) Delete(key string) error {
 	return bs.db.Update(func(tx *bolt.Tx) error {
 		return tx.Bucket([]byte(defaultBoltBucket)).Delete([]byte(key))

pkg/store/helper.go

@@ -0,0 +1,11 @@
+// Copyright (C) 2019 Marius Schellenberger
+
+package store
+
+// Parts taken from strings.TrimPrefix
+func hasTrimPrefix(s, prefix string) (string, bool) {
+	if len(s) >= len(prefix) && s[0:len(prefix)] == prefix {
+		return s[len(prefix):], true
+	}
+	return s, false
+}

pkg/store/store.go

@@ -17,6 +17,7 @@ type Store interface {
 	Get(string, interface{}) error
 	Set(string, interface{}) error
 	ForEach(func(string, []byte) error) error
+	ForEachPrefix(string, func(string, []byte) error) error
 	Delete(string) error
 	Close() error
 }