feat: add directory management functionality and update handlers to utilize default directory

client/bot/handlers/utils/dirutil/context.go

@@ -0,0 +1,37 @@
+package dirutil
+
+import (
+	"context"
+
+	"github.com/krau/SaveAny-Bot/database"
+)
+
+type contextKey struct{}
+
+var dirContextKey = contextKey{}
+
+func WithContext(ctx context.Context, dir *database.Dir) context.Context {
+	if dir == nil {
+		return ctx
+	}
+	return context.WithValue(ctx, dirContextKey, dir)
+}
+
+func FromContext(ctx context.Context) *database.Dir {
+	dir, ok := ctx.Value(dirContextKey).(*database.Dir)
+	if !ok {
+		return nil
+	}
+	return dir
+}
+
+// PathFromContext returns the directory path stored in the context.
+//
+// If no directory is found, an empty string is returned.
+func PathFromContext(ctx context.Context) string {
+	dir := FromContext(ctx)
+	if dir == nil {
+		return ""
+	}
+	return dir.Path
+}