initial

lib/utils/bottom_sheet_page.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+
+class BottomSheetPage extends Page {
+  const BottomSheetPage({
+    required this.builder,
+    this.fixed = false,
+  });
+
+  final Widget Function(ScrollController? controller) builder;
+  final bool fixed;
+
+  @override
+  Route<void> createRoute(BuildContext context) {
+    return ModalBottomSheetRoute(
+      settings: this,
+      isScrollControlled: !fixed,
+      useSafeArea: true,
+      showDragHandle: true,
+      builder: (_) {
+        if (!fixed) {
+          return DraggableScrollableSheet(
+            expand: false,
+            builder: (_, scrollController) => builder(scrollController),
+          );
+        }
+        return builder(null);
+      },
+    );
+  }
+}