egutierrez
ae22787e60
- logger_new (impuro): construye *Logger con handler JSON/text segun formato - logger_with (puro): clona el Logger anadiendo campos contextuales via slog.With Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package infra
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import (
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"fmt"
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"io"
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"log/slog"
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"os"
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)
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// LoggerNew crea un Logger con nivel, destino y formato configurables.
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// format debe ser "json" o "text". Si output es nil se usa os.Stderr.
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// Retorna error si el formato no es valido.
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func LoggerNew(level LogLevel, output io.Writer, format string) (*Logger, error) {
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if output == nil {
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output = os.Stderr
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}
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slogLevel := toSlogLevel(level)
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opts := &slog.HandlerOptions{Level: slogLevel}
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var handler slog.Handler
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switch format {
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case "json":
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handler = slog.NewJSONHandler(output, opts)
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case "text":
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handler = slog.NewTextHandler(output, opts)
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default:
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return nil, fmt.Errorf("logger_new: formato invalido %q, usa \"json\" o \"text\"", format)
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}
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return &Logger{
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Level: level,
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Output: output,
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Format: format,
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Fields: map[string]any{},
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inner: slog.New(handler),
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}, nil
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}
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// toSlogLevel convierte LogLevel a slog.Level.
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func toSlogLevel(level LogLevel) slog.Level {
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switch level {
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case LogLevelDebug:
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return slog.LevelDebug
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case LogLevelInfo:
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return slog.LevelInfo
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case LogLevelWarn:
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return slog.LevelWarn
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case LogLevelError:
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return slog.LevelError
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default:
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return slog.LevelInfo
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}
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}
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