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|
package main
import (
"log"
"os"
)
const (
infoLevel = 1
errLevel = 2
)
type Log struct {
level int
}
func NewLogger(logLevel string) *Log {
if logLevel == "err" {
return &Log{1}
}
if logLevel == "info" {
return &Log{2}
}
return &Log{0}
}
func (l *Log) Infof(format string, args ...interface{}) {
if l.level >= infoLevel {
log.SetPrefix("INFO: ")
log.SetOutput(os.Stdout)
log.Printf(format, args...)
}
}
func (l *Log) Errorf(format string, args ...interface{}) {
if l.level >= errLevel {
log.SetPrefix("ERROR: ")
log.SetOutput(os.Stderr)
log.Printf(format, args...)
}
}
func (l *Log) Fatalf(format string, args ...interface{}) {
log.SetPrefix("FATAL: ")
log.SetOutput(os.Stderr)
log.Fatalf(format, args...)
}
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