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Winni Neessen
6633591b51
As stated in https://github.com/wneessen/go-mail/pull/102#issuecomment-1411956040 it would be beneficial if, instead of forcing the Go stdlib logger on the user to provide a simple interface and use that for logging purposes. This PR implements this simple log.Logger interface as well as a standard logger that satisfies this interface. If no custom logger is provided, the Stdlog will be used (which makes use of the Go stdlib again). Accordingly, a `Client.WithLogger` and `Client.SetLogger` have been implemented. Same applies for the smtp counterparts.
74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
// SPDX-FileCopyrightText: Copyright (c) 2023 The go-mail Authors
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//
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// SPDX-License-Identifier: MIT
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package log
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import (
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"fmt"
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"io"
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"log"
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)
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// Level is a type wrapper for an int
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type Level int
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// Stdlog is the default logger that satisfies the Logger interface
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type Stdlog struct {
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l Level
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err *log.Logger
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warn *log.Logger
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info *log.Logger
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debug *log.Logger
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}
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const (
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// LevelError is the Level for only ERROR log messages
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LevelError Level = iota
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// LevelWarn is the Level for WARN and higher log messages
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LevelWarn
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// LevelInfo is the Level for INFO and higher log messages
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LevelInfo
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// LevelDebug is the Level for DEBUG and higher log messages
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LevelDebug
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)
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// New returns a new Stdlog type that satisfies the Logger interface
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func New(o io.Writer, l Level) *Stdlog {
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lf := log.Lmsgprefix | log.LstdFlags
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return &Stdlog{
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l: l,
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err: log.New(o, "ERROR: ", lf),
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warn: log.New(o, " WARN: ", lf),
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info: log.New(o, " INFO: ", lf),
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debug: log.New(o, "DEBUG: ", lf),
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}
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}
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// Debugf performs a Printf() on the debug logger
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func (l *Stdlog) Debugf(f string, v ...interface{}) {
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if l.l >= LevelDebug {
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_ = l.debug.Output(2, fmt.Sprintf(f, v...))
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}
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}
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// Infof performs a Printf() on the info logger
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func (l *Stdlog) Infof(f string, v ...interface{}) {
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if l.l >= LevelInfo {
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_ = l.info.Output(2, fmt.Sprintf(f, v...))
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}
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}
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// Warnf performs a Printf() on the warn logger
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func (l *Stdlog) Warnf(f string, v ...interface{}) {
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if l.l >= LevelWarn {
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_ = l.warn.Output(2, fmt.Sprintf(f, v...))
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}
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}
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// Errorf performs a Printf() on the error logger
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func (l *Stdlog) Errorf(f string, v ...interface{}) {
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if l.l >= LevelError {
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_ = l.err.Output(2, fmt.Sprintf(f, v...))
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}
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}
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