Clear user appointments on unregister

nuss.go

@@ -256,6 +256,52 @@ func DeleteUserFromAppointment(username string, animeId int64, meeting time.Time
 	return &appoint, err
 }
 
+func DeleteUserFromAppointmens(username string) error {
+	return db.Update(
+		func(tx *nutsdb.Tx) error {
+			entries, err := tx.GetAll(bucketAppoint)
+			if err != nil {
+				return err
+			}
+			// iterate entries
+			for _, e := range entries {
+				// parse user list
+				users, err := parseAppointmentUserList(e.Value)
+				if err != nil {
+					return err
+				}
+				// check if user already part
+				for i, u := range users {
+					if u == username {
+						// delete user from list
+						users[i] = users[len(users)-1]
+						users = users[:len(users)-1]
+						// check if appointment needs recycling
+						if len(users) == 0 {
+							err = tx.Delete(bucketAppoint, e.Key)
+							if err != nil {
+								return err
+							}
+						} else {
+							newData, err := json.Marshal(users)
+							if err != nil {
+								return err
+							}
+							err = tx.Put(bucketAppoint, e.Key, newData, nutsdb.Persistent)
+							if err != nil {
+								return err
+							}
+						}
+
+						break
+					}
+				}
+			}
+			return nil
+
+		})
+}
+
 func DeleteAnime(tx *nutsdb.Tx, keyBytes []byte) error {
 	// clear appointments
 	appoints, err := tx.GetAll(bucketAppoint)