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logger.go
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logger.go
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package gotils
import (
"io"
"log"
"strings"
)
type LogLevel uint8
const (
LogLevelDebug = LogLevel(iota)
LogLevelInfo
LogLevelWarning
LogLevelError
LogLevelPanic
)
const ConfigLogLevel = EnvConfig("LOG_LEVEL")
const ErrorLogLevelNotSet = Error("LOG_LEVEL_NOT_SET")
type Logger struct {
outLogger *log.Logger
errLogger *log.Logger
level LogLevel
}
func (l *Logger) Debug(msg string, values ...any) {
if l.level > LogLevelDebug {
return
}
l.outLogger.Printf("DEBUG | "+msg, values...)
}
func (l *Logger) Info(msg string, values ...any) {
if l.level > LogLevelInfo {
return
}
l.outLogger.Printf("INFO | "+msg, values...)
}
func (l *Logger) Warning(msg string, values ...any) {
if l.level > LogLevelWarning {
return
}
l.outLogger.Printf("WARNING | "+msg, values...)
}
func (l *Logger) Error(msg string, values ...any) {
if l.level > LogLevelError {
return
}
l.outLogger.Printf("ERROR | "+msg, values...)
}
func (l *Logger) Panic(msg string, values ...any) {
l.errLogger.Panicf("PANIC | "+msg, values...)
}
func NewLogger(level LogLevel, out, err io.Writer) *Logger {
return &Logger{
outLogger: log.New(out, "", log.Ldate|log.Ltime|log.LUTC),
errLogger: log.New(err, "", log.Ldate|log.Ltime|log.LUTC),
level: level,
}
}
func LogLevelFromEnv() (LogLevel, error) {
logLevelMap := map[string]LogLevel{
"debug": LogLevelDebug,
"info": LogLevelInfo,
"warning": LogLevelWarning,
"error": LogLevelError,
"panic": LogLevelPanic,
}
setting := ConfigLogLevel.Load()
setting = strings.ToLower(setting)
level, ok := logLevelMap[setting]
if !ok {
return LogLevelDebug, ErrorLogLevelNotSet
}
return level, nil
}