config

type ConfigProvider interface {
	Init() error
	GetString(key string) string
	GetInt(key string) int64
	GetBool(key string) bool
	GetStringE(key string) (string, bool)
	GetIntE(key string) (int64, bool)
	GetBoolE(key string) (bool, bool)
}

type ConfigProviderWithDefault interface {
	ConfigProvider
	GetStringOrDefault(key, defaultValue string) string
	GetIntOrDefault(key string, defaultValue int64) int64
	GetBoolOrDefault(key string, defaultValue bool) bool
}

type ConfigUnmarshaler interface {
	ConfigProvider
	Unmarshal(val interface{}) error
	UnmarshalWithPrefix(prefix string, val interface{}) error
}

type DefaultBehavior int

type IConfig interface {
	ConfigUnmarshaler
	ConfigProviderWithDefault
}

type UnmarshalOption func(*UnmarshalOptions)

type UnmarshalOptions struct {
	TagName         string
	Prefix          string
	DefaultBehavior DefaultBehavior
}