package headscale import ( "errors" "github.com/jinzhu/gorm" _ "github.com/jinzhu/gorm/dialects/postgres" ) const dbVersion = "1" // KV is a key-value store in a psql table. For future use... type KV struct { Key string Value string } func (h *Headscale) initDB() error { db, err := gorm.Open("postgres", h.dbString) if err != nil { return err } db.Exec("create extension if not exists \"uuid-ossp\";") db.AutoMigrate(&Machine{}) db.AutoMigrate(&KV{}) db.Close() h.setValue("db_version", dbVersion) return nil } func (h *Headscale) db() (*gorm.DB, error) { db, err := gorm.Open("postgres", h.dbString) if err != nil { return nil, err } return db, nil } func (h *Headscale) getValue(key string) (string, error) { db, err := h.db() if err != nil { return "", err } defer db.Close() var row KV if db.First(&row, "key = ?", key).RecordNotFound() { return "", errors.New("not found") } return row.Value, nil } func (h *Headscale) setValue(key string, value string) error { kv := KV{ Key: key, Value: value, } db, err := h.db() if err != nil { return err } defer db.Close() _, err = h.getValue(key) if err == nil { db.Model(&kv).Where("key = ?", key).Update("value", value) return nil } db.Create(kv) return nil }