go-mail/log/jsonlog.go

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// SPDX-FileCopyrightText: Copyright (c) 2023 The go-mail Authors
//
// SPDX-License-Identifier: MIT
//go:build go1.21
// +build go1.21
package log
import (
"fmt"
"io"
"log/slog"
)
// JSONlog is the default structured JSON logger that satisfies the Logger interface
type JSONlog struct {
level Level
log *slog.Logger
}
// NewJSON returns a new JSONlog type that satisfies the Logger interface
func NewJSON(output io.Writer, level Level) *JSONlog {
logOpts := slog.HandlerOptions{}
switch level {
case LevelDebug:
logOpts.Level = slog.LevelDebug
case LevelInfo:
logOpts.Level = slog.LevelInfo
case LevelWarn:
logOpts.Level = slog.LevelWarn
case LevelError:
logOpts.Level = slog.LevelError
default:
logOpts.Level = slog.LevelDebug
}
logHandler := slog.NewJSONHandler(output, &logOpts)
return &JSONlog{
level: level,
log: slog.New(logHandler),
}
}
// Debugf logs a debug message via the structured JSON logger
func (l *JSONlog) Debugf(log Log) {
if l.level >= LevelDebug {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Debug(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Infof logs a info message via the structured JSON logger
func (l *JSONlog) Infof(log Log) {
if l.level >= LevelInfo {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Info(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Warnf logs a warn message via the structured JSON logger
func (l *JSONlog) Warnf(log Log) {
if l.level >= LevelWarn {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Warn(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Errorf logs a warn message via the structured JSON logger
func (l *JSONlog) Errorf(log Log) {
if l.level >= LevelError {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Error(fmt.Sprintf(log.Format, log.Messages...))
}
}