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|
package logging
import (
"encoding/json"
"fmt"
"log/slog"
"os"
"github.com/sirupsen/logrus"
)
type Config struct {
Level string `json:"level"`
Formatter formatter `json:"formatter"`
LocalLogger bool `json:"localLogger"`
AddSource bool `json:"addSource"`
}
type formatter struct {
Format string `json:"format"`
Data map[string]interface{} `json:"data"`
}
type loggingConfig Config
func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
log = (*logger)(logrus.New())
err := unmarshal((*loggingConfig)(c))
if err != nil {
return err
}
return c.SetLogger()
}
func (c *Config) UnmarshalJSON(data []byte) error {
log = (*logger)(logrus.New())
err := json.Unmarshal(data, (*loggingConfig)(c))
if err != nil {
return err
}
return c.SetLogger()
}
func (c *Config) SetLogger() (err error) {
err = c.parseFormatter()
if err != nil {
return err
}
err = c.parseLevel()
if err != nil {
return err
}
err = c.unmarshalFormatter()
if err != nil {
return err
}
c.setGlobal()
return nil
}
func (c *Config) setGlobal() {
if c.LocalLogger {
return
}
logrus.SetFormatter(log.Formatter)
logrus.SetLevel(log.Level)
logrus.SetReportCaller(log.ReportCaller)
log = (*logger)(logrus.StandardLogger())
}
func (c *Config) unmarshalFormatter() error {
formatterData, err := json.Marshal(c.Formatter.Data)
if err != nil {
return err
}
return json.Unmarshal(formatterData, log.Formatter)
}
func (c *Config) parseLevel() error {
if c.Level == "" {
log.Level = logrus.InfoLevel
return nil
}
level, err := logrus.ParseLevel(c.Level)
if err != nil {
return err
}
log.Level = level
return nil
}
const (
FormatterText = "text"
FormatterJSON = "json"
)
func (c *Config) parseFormatter() error {
switch c.Formatter.Format {
case FormatterJSON:
log.Formatter = &logrus.JSONFormatter{}
case FormatterText, "":
log.Formatter = &logrus.TextFormatter{}
default:
return fmt.Errorf("%s formatter not supported", c.Formatter)
}
return nil
}
// Slog constructs a slog.Logger with the Formatter and Level from config.
func (c *Config) Slog() *slog.Logger {
logger := slog.Default()
var level slog.Level
if err := level.UnmarshalText([]byte(c.Level)); err != nil {
logger.Warn("invalid config, using default slog", "err", err)
return logger
}
opts := &slog.HandlerOptions{
AddSource: c.AddSource,
Level: level,
ReplaceAttr: c.fieldMapToPlaceKey(),
}
switch c.Formatter.Format {
case FormatterText:
return slog.New(slog.NewTextHandler(os.Stderr, opts))
case FormatterJSON:
return slog.New(slog.NewJSONHandler(os.Stderr, opts))
case "":
logger.Warn("no slog format in config, using text handler")
default:
logger.Warn("unknown slog format in config, using text handler", "format", c.Formatter.Format)
}
return slog.New(slog.NewTextHandler(os.Stderr, opts))
}
func (c *Config) fieldMapToPlaceKey() func(groups []string, a slog.Attr) slog.Attr {
fieldMap, ok := c.Formatter.Data["fieldmap"].(map[string]interface{})
if !ok {
return nil
}
return func(groups []string, a slog.Attr) slog.Attr {
for key, newKey := range fieldMap {
if a.Key == key {
a.Key = newKey.(string)
return a
}
}
return a
}
}
|
