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package main
import (
"fmt"
"os"
"strings"
)
type LogLevel int
const (
LevelDebug LogLevel = iota
LevelInfo
LevelWarn
LevelError
LevelNone
)
var logLevelNames = map[LogLevel]string{
LevelDebug: "DEBUG",
LevelInfo: "INFO",
LevelWarn: "WARN",
LevelError: "ERROR",
LevelNone: "NONE",
}
var currentLevel = LevelInfo
func SetLogLevel(level LogLevel) {
currentLevel = level
}
func ParseLogLevel(s string) (LogLevel, error) {
switch strings.ToUpper(s) {
case "DEBUG":
return LevelDebug, nil
case "INFO":
return LevelInfo, nil
case "WARN":
return LevelWarn, nil
case "ERROR":
return LevelError, nil
case "NONE":
return LevelNone, nil
default:
return LevelInfo, fmt.Errorf("unknown log level: %s (valid: debug, info, warn, error, none)", s)
}
}
func logDebug(format string, args ...interface{}) {
if currentLevel <= LevelDebug {
fmt.Fprintf(os.Stderr, "DEBUG: "+format+"\n", args...)
}
}
func logInfo(format string, args ...interface{}) {
if currentLevel <= LevelInfo {
fmt.Fprintf(os.Stderr, format+"\n", args...)
}
}
func logWarn(format string, args ...interface{}) {
if currentLevel <= LevelWarn {
fmt.Fprintf(os.Stderr, "WARN: "+format+"\n", args...)
}
}
func logErrorf(format string, args ...interface{}) {
if currentLevel <= LevelError {
fmt.Fprintf(os.Stderr, "ERROR: "+format+"\n", args...)
}
}
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