레포 업데이트

backend/internal/logger/logger.go

@@ -1,6 +1,7 @@
 package logger
 
 import (
+	"io"
 	"log/slog"
 	"os"
 	"strings"
@@ -8,18 +9,28 @@ import (
 
 // Config holds the logger configuration
 type Config struct {
-	ServiceName string
-	Environment string // "dev", "local", "production"
+	ServiceName   string
+	Environment   string // APP_ENV 기준
+	LevelOverride string
+	Output        io.Writer
+}
+
+func IsProductionLikeEnv(appEnv string) bool {
+	env := strings.ToLower(strings.TrimSpace(appEnv))
+	return env == "prod" || env == "production" || env == "stage" || env == "staging"
 }
 
 // Init initializes the global logger with slog.
 // It detects the environment to switch between TextHandler (dev) and JSONHandler (prod).
 func Init(cfg Config) {
 	var handler slog.Handler
+	output := cfg.Output
+	if output == nil {
+		output = os.Stdout
+	}
 
 	opts := &slog.HandlerOptions{
-		// Default level
-		Level: slog.LevelInfo,
+		Level: ResolveBackendLogLevel(cfg.Environment, cfg.LevelOverride),
 		// Customize attributes (Time format)
 		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
 			if a.Key == slog.TimeKey {
@@ -32,11 +43,10 @@ func Init(cfg Config) {
 	// Adjust level and format based on environment
 	env := strings.ToLower(cfg.Environment)
 	if env == "dev" || env == "local" || env == "development" {
-		opts.Level = slog.LevelDebug
-		handler = slog.NewTextHandler(os.Stdout, opts)
+		handler = slog.NewTextHandler(output, opts)
 	} else {
 		// Production defaults to JSON
-		handler = slog.NewJSONHandler(os.Stdout, opts)
+		handler = slog.NewJSONHandler(output, opts)
 	}
 
 	// Create logger with common attributes
@@ -47,3 +57,22 @@ func Init(cfg Config) {
 	// Set as global default logger
 	slog.SetDefault(logger)
 }
+
+func ResolveBackendLogLevel(appEnv, override string) slog.Level {
+	switch strings.ToLower(strings.TrimSpace(override)) {
+	case "debug":
+		return slog.LevelDebug
+	case "info":
+		return slog.LevelInfo
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	}
+
+	env := strings.ToLower(strings.TrimSpace(appEnv))
+	if env == "dev" || env == "local" || env == "development" {
+		return slog.LevelDebug
+	}
+	return slog.LevelInfo
+}