Major refactor to library

pkg/logging/logging.go

@@ -0,0 +1,56 @@
+package logging
+
+import "log/slog"
+
+// Logger interface allows users to plug in their own logger
+type Logger interface {
+	Debug(msg string, args ...any)
+	Info(msg string, args ...any)
+	Warn(msg string, args ...any)
+	Error(msg string, args ...any)
+}
+
+var defaultLogger Logger = &slogLogger{logger: slog.Default()}
+
+// SetLogger allows users to plug in their own logger
+func SetLogger(l Logger) {
+	defaultLogger = l
+}
+
+// Init initializes the default slog logger with a specific log level
+func Init(level string) {
+	var slogLevel slog.Level
+	switch level {
+	case "debug":
+		slogLevel = slog.LevelDebug
+	case "info":
+		slogLevel = slog.LevelInfo
+	case "warn":
+		slogLevel = slog.LevelWarn
+	case "error":
+		slogLevel = slog.LevelError
+	default:
+		slogLevel = slog.LevelInfo
+	}
+
+	handler := slog.NewTextHandler(nil, &slog.HandlerOptions{
+		Level: slogLevel,
+	})
+	defaultLogger = &slogLogger{logger: slog.New(handler)}
+}
+
+// Default slog implementation
+type slogLogger struct {
+	logger *slog.Logger
+}
+
+func (s *slogLogger) Debug(msg string, args ...any) { s.logger.Debug(msg, args...) }
+func (s *slogLogger) Info(msg string, args ...any)  { s.logger.Info(msg, args...) }
+func (s *slogLogger) Warn(msg string, args ...any)  { s.logger.Warn(msg, args...) }
+func (s *slogLogger) Error(msg string, args ...any) { s.logger.Error(msg, args...) }
+
+// Package-level functions for convenience
+func Debug(msg string, args ...any) { defaultLogger.Debug(msg, args...) }
+func Info(msg string, args ...any)  { defaultLogger.Info(msg, args...) }
+func Warn(msg string, args ...any)  { defaultLogger.Warn(msg, args...) }
+func Error(msg string, args ...any) { defaultLogger.Error(msg, args...) }