contact invitation algorithm

lib/components/bottom_sheet_action_button.dart

@@ -0,0 +1,67 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class BottomSheetActionButton extends ConsumerStatefulWidget {
+  const BottomSheetActionButton(
+      {required this.bottomSheetBuilder,
+      required this.builder,
+      this.foregroundColor,
+      this.backgroundColor,
+      this.shape,
+      super.key});
+  final Color? foregroundColor;
+  final Color? backgroundColor;
+  final ShapeBorder? shape;
+  final Widget Function(BuildContext) builder;
+  final Widget Function(BuildContext) bottomSheetBuilder;
+
+  @override
+  BottomSheetActionButtonState createState() => BottomSheetActionButtonState();
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties
+      ..add(ObjectFlagProperty<Widget Function(BuildContext p1)>.has(
+          'bottomSheetBuilder', bottomSheetBuilder))
+      ..add(ColorProperty('foregroundColor', foregroundColor))
+      ..add(ColorProperty('backgroundColor', backgroundColor))
+      ..add(DiagnosticsProperty<ShapeBorder?>('shape', shape))
+      ..add(ObjectFlagProperty<Widget? Function(BuildContext p1)>.has(
+          'builder', builder));
+  }
+}
+
+class BottomSheetActionButtonState
+    extends ConsumerState<BottomSheetActionButton> {
+  bool _showFab = true;
+
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  // ignore: prefer_expression_function_bodies
+  Widget build(BuildContext context) {
+    //
+    return _showFab
+        ? FloatingActionButton(
+            shape: widget.shape,
+            foregroundColor: widget.foregroundColor,
+            backgroundColor: widget.backgroundColor,
+            child: widget.builder(context),
+            onPressed: () async {
+              await showModalBottomSheet<void>(
+                  context: context, builder: widget.bottomSheetBuilder);
+            },
+          )
+        : Container();
+  }
+
+  void showFloatingActionButton(bool value) {
+    setState(() {
+      _showFab = value;
+    });
+  }
+}