logger

type Config struct {
	Base         string `mapstructure:"base"`
	Level        string `mapstructure:"level"`
	Format       string `mapstructure:"format"`
	Enabled      bool   `mapstructure:"enabled"`
	MaxAge       uint   `mapstructure:"max_age"` // days
	MaxBackups   uint   `mapstructure:"max_backups"`
	MaxSize      uint   `mapstructure:"max_size"` // MBs
	Compress     bool   `mapstructure:"compress"`
	ReportCaller bool   `mapstructure:"report_caller"`
	Filename     string `mapstructure:"filename"`
}

type Fields map[string]interface{}

type LogEntry interface {
	Debug(...interface{})
	Debugf(string, ...interface{})
	Debugln(...interface{})
	Error(...interface{})
	Errorf(string, ...interface{})
	Errorln(...interface{})
	Fatal(...interface{})
	Fatalf(string, ...interface{})
	Fatalln(...interface{})
	Info(...interface{})
	Infof(string, ...interface{})
	Infoln(...interface{})
	Trace(...interface{})
	Tracef(string, ...interface{})
	Traceln(...interface{})
	Panic(...interface{})
	Panicf(string, ...interface{})
	Panicln(...interface{})
	Print(...interface{})
	Printf(string, ...interface{})
	Println(...interface{})
	Warn(...interface{})
	Warnf(string, ...interface{})
	Warnln(...interface{})

	WithField(string, interface{}) LogEntry
	WithFields(Fields) LogEntry
	WithContext(context.Context) LogEntry
}

type Logger interface {
	LogEntry

	AddHook(interface{}) error
	NewEntry() LogEntry
	SetWriter(io.Writer)
	SetReportCaller(bool)
	SetLevel(string)
	SetFormatter(string)
}