playground/frontend/lib/pages/standalone_playground/page.dart

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:app_state/app_state.dart';
import 'package:flutter/foundation.dart';
import 'package:playground_components/playground_components.dart';

import '../../constants/params.dart';
import '../../modules/examples/models/example_loading_descriptors/examples_loading_descriptor_factory.dart';
import 'screen.dart';
import 'state.dart';

class StandalonePlaygroundPage
    extends StatefulMaterialPage<void, StandalonePlaygroundNotifier> {
  static const classFactoryKey = 'StandalonePlayground';

  /// Called when navigating to the page programmatically.
  StandalonePlaygroundPage({
    required ExamplesLoadingDescriptor descriptor,
  }) : super(
          key: const ValueKey(classFactoryKey),
          state: StandalonePlaygroundNotifier(initialDescriptor: descriptor),
          createScreen: StandalonePlaygroundScreen.new,
        );

  /// Called when re-creating the page at a navigation intent.
  factory StandalonePlaygroundPage.fromStateMap(Map map) {
    return StandalonePlaygroundPage(
      descriptor: _descriptorFromMap(map[kDescriptorParam]),
    );
  }

  static ExamplesLoadingDescriptor _descriptorFromMap(Map? map) {
    if (map == null) {
      return ExamplesLoadingDescriptor.empty;
    }

    return ExamplesLoadingDescriptorFactory.fromMap(map).copyWithMissingLazy(
      ExamplesLoadingDescriptorFactory.defaultLazyLoadDescriptors,
    );
  }
}