Second checkpoint

internal/platform/logger/logger.go

@@ -0,0 +1,37 @@
+// Package logger provides a configured slog.Logger for the application.
+package logger
+
+import (
+	"log/slog"
+	"os"
+	"strings"
+)
+
+// New returns a structured logger. format is "json" or "text" (default json),
+// level is one of debug|info|warn|error (default info).
+func New(format, level string) *slog.Logger {
+	opts := &slog.HandlerOptions{Level: parseLevel(level)}
+
+	var handler slog.Handler
+	switch strings.ToLower(format) {
+	case "text":
+		handler = slog.NewTextHandler(os.Stdout, opts)
+	default:
+		handler = slog.NewJSONHandler(os.Stdout, opts)
+	}
+
+	return slog.New(handler)
+}
+
+func parseLevel(level string) slog.Level {
+	switch strings.ToLower(level) {
+	case "debug":
+		return slog.LevelDebug
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}