go-mail/log/stdlog.go

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// SPDX-FileCopyrightText: Copyright (c) 2023 The go-mail Authors
//
// SPDX-License-Identifier: MIT
package log
import (
"fmt"
"io"
"log"
)
// Level is a type wrapper for an int
type Level int
// Stdlog is the default logger that satisfies the Logger interface
type Stdlog struct {
l Level
err *log.Logger
warn *log.Logger
info *log.Logger
debug *log.Logger
}
const (
// LevelError is the Level for only ERROR log messages
LevelError Level = iota
// LevelWarn is the Level for WARN and higher log messages
LevelWarn
// LevelInfo is the Level for INFO and higher log messages
LevelInfo
// LevelDebug is the Level for DEBUG and higher log messages
LevelDebug
)
// CallDepth is the call depth value for the log.Logger's Output method
// This defaults to 2 and is only here for better readablity of the code
const CallDepth = 2
// New returns a new Stdlog type that satisfies the Logger interface
func New(o io.Writer, l Level) *Stdlog {
lf := log.Lmsgprefix | log.LstdFlags
return &Stdlog{
l: l,
err: log.New(o, "ERROR: ", lf),
warn: log.New(o, " WARN: ", lf),
info: log.New(o, " INFO: ", lf),
debug: log.New(o, "DEBUG: ", lf),
}
}
// Debugf performs a Printf() on the debug logger
func (l *Stdlog) Debugf(f string, v ...interface{}) {
if l.l >= LevelDebug {
_ = l.debug.Output(CallDepth, fmt.Sprintf(f, v...))
}
}
// Infof performs a Printf() on the info logger
func (l *Stdlog) Infof(f string, v ...interface{}) {
if l.l >= LevelInfo {
_ = l.info.Output(CallDepth, fmt.Sprintf(f, v...))
}
}
// Warnf performs a Printf() on the warn logger
func (l *Stdlog) Warnf(f string, v ...interface{}) {
if l.l >= LevelWarn {
_ = l.warn.Output(CallDepth, fmt.Sprintf(f, v...))
}
}
// Errorf performs a Printf() on the error logger
func (l *Stdlog) Errorf(f string, v ...interface{}) {
if l.l >= LevelError {
_ = l.err.Output(CallDepth, fmt.Sprintf(f, v...))
}
}