logger.go

/*
This file is part of execloop.

execloop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

execloop is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with execloop.  If not, see <https://www.gnu.org/licenses/>.
*/
package execloop

import (
	"log"
	"os"
)

type Logger interface {
	Debugf(string, ...interface{})
	Infof(string, ...interface{})
	Warningf(string, ...interface{})
	Errorf(string, ...interface{})
}

func (o *Options) Debugf(f string, v ...interface{}) {
	if o.Logger == nil {
		return
	}
	o.Logger.Debugf(f, v...)
}

func (o *Options) Infof(f string, v ...interface{}) {
	if o.Logger == nil {
		return
	}
	o.Logger.Infof(f, v...)
}

func (o *Options) Warningf(f string, v ...interface{}) {
	if o.Logger == nil {
		return
	}
	o.Logger.Warningf(f, v...)
}

func (o *Options) Errorf(f string, v ...interface{}) {
	if o.Logger == nil {
		return
	}
	o.Logger.Errorf(f, v...)
}

type defaultLogger struct {
	*log.Logger
}

func (l *defaultLogger) Debugf(f string, v ...interface{}) {
	l.Printf("DEBUG: "+f, v...)
}

func (l *defaultLogger) Infof(f string, v ...interface{}) {
	l.Printf("INFO: "+f, v...)
}

func (l *defaultLogger) Warningf(f string, v ...interface{}) {
	l.Printf("WARN: "+f, v...)
}

func (l *defaultLogger) Errorf(f string, v ...interface{}) {
	l.Printf("ERROR: "+f, v...)
}

var defaultLog = &defaultLogger{log.New(os.Stdout, "execloop-", log.LstdFlags)}