Flutter RFW Helper Widget

rfw.dart

import 'package:flutter/material.dart';
import 'package:rfw/formats.dart';
import 'package:rfw/rfw.dart';

class Rfw extends StatefulWidget {
  const Rfw({
    super.key,
    required this.source,
    this.data = const {},
  });

  final String source;
  final Map<String, dynamic> data;

  @override
  State<Rfw> createState() => _RfwState();
}

class _RfwState extends State<Rfw> {
  bool loading = false;
  final _runtime = Runtime();
  final _data = DynamicContent();
  String? _lastUi;
  Map<String, dynamic>? _lastArgs;

  @override
  void initState() {
    super.initState();
    _runtime.update(
      const LibraryName(<String>['core']),
      createCoreWidgets(),
    );
    _runtime.update(
      const LibraryName(<String>['material']),
      createMaterialWidgets(),
    );
    onRfw(widget.source, widget.data);
  }

  static const mainLibrary = LibraryName(<String>['main']);
  RemoteWidgetLibrary? _remoteWidget;

  void setLoading(bool value) {
    if (mounted) {
      setState(() {
        loading = value;
      });
    }
  }

  void onRfw(String result, Map<String, dynamic> args) {
    final isNew = _lastUi == null && _lastArgs == null;
    if (_lastUi != result) {
      if (result.trim().isEmpty) return;
      _remoteWidget = parseLibraryFile(result);
      _runtime.update(mainLibrary, _remoteWidget!);
      _lastUi = result;
    }
    if (_lastArgs != args) {
      _data.updateAll(args);
      _lastArgs = args;
    }
    if (!isNew && mounted) setState(() {});
  }

  @override
  void didUpdateWidget(covariant Rfw oldWidget) {
    if (oldWidget.source != widget.source || oldWidget.data != widget.data) {
      onRfw(widget.source, widget.data);
    }
    super.didUpdateWidget(oldWidget);
  }

  @override
  Widget build(BuildContext context) {
    if (_remoteWidget == null) {
      return const Center(child: CircularProgressIndicator());
    }
    return RemoteWidget(
      runtime: _runtime,
      data: _data,
      widget: const FullyQualifiedWidgetName(mainLibrary, 'root'),
      onEvent: (name, arguments) => onEvent(context, name, arguments),
    );
  }

  void onEvent(
    BuildContext context,
    String name,
    Map<String, dynamic>? arguments,
  ) {
    debugPrint('user triggered event "$name" with data: $arguments');
  }
}