egutierrez
c5b4ffda65
- 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>
47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package infra
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import "sort"
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// LoggerWith retorna una copia del Logger con campos adicionales.
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// No muta el logger original — los campos se apilan sobre los ya existentes.
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// Funcion pura: misma entrada produce siempre la misma salida sin I/O.
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func LoggerWith(logger *Logger, fields map[string]any) *Logger {
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if logger == nil {
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return nil
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}
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// Combinar fields existentes + nuevos (los nuevos tienen precedencia)
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combined := make(map[string]any, len(logger.Fields)+len(fields))
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for k, v := range logger.Fields {
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combined[k] = v
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}
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for k, v := range fields {
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combined[k] = v
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}
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// Convertir a args key-value ordenados para slog.With (orden determinista)
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keys := make([]string, 0, len(fields))
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for k := range fields {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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args := make([]any, 0, len(keys)*2)
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for _, k := range keys {
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args = append(args, k, fields[k])
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}
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var inner = logger.inner
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if inner != nil && len(args) > 0 {
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inner = inner.With(args...)
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}
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return &Logger{
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Level: logger.Level,
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Output: logger.Output,
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Format: logger.Format,
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Fields: combined,
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inner: inner,
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}
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}
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