log.go

package core

import (
  "fmt"
  "os"
  "sync"

  "github.com/fatih/color"
)

const (
  FATAL     = 5
  ERROR     = 4
  WARN      = 3
  IMPORTANT = 2
  INFO      = 1
  DEBUG     = 0
)

var LogColors = map[int]*color.Color{
  FATAL:     color.New(color.FgRed).Add(color.Bold),
  ERROR:     color.New(color.FgRed),
  WARN:      color.New(color.FgYellow),
  IMPORTANT: color.New(color.Bold),
  DEBUG:     color.New(color.FgCyan).Add(color.Faint),
}

type Logger struct {
  sync.Mutex

  debug  bool
  silent bool
}

func (l *Logger) SetSilent(s bool) {
  l.silent = s
}

func (l *Logger) SetDebug(d bool) {
  l.debug = d
}

func (l *Logger) Log(level int, format string, args ...interface{}) {
  l.Lock()
  defer l.Unlock()
  if level == DEBUG && l.debug == false {
    return
  } else if level < ERROR && l.silent == true {
    return
  }

  if c, ok := LogColors[level]; ok {
    c.Printf(format, args...)
  } else {
    fmt.Printf(format, args...)
  }

  if level == FATAL {
    os.Exit(1)
  }
}

func (l *Logger) Fatal(format string, args ...interface{}) {
  l.Log(FATAL, format, args...)
}

func (l *Logger) Error(format string, args ...interface{}) {
  l.Log(ERROR, format, args...)
}

func (l *Logger) Warn(format string, args ...interface{}) {
  l.Log(WARN, format, args...)
}

func (l *Logger) Important(format string, args ...interface{}) {
  l.Log(IMPORTANT, format, args...)
}

func (l *Logger) Info(format string, args ...interface{}) {
  l.Log(INFO, format, args...)
}

func (l *Logger) Debug(format string, args ...interface{}) {
  l.Log(DEBUG, format, args...)
}