smooth-app/packages/smooth_app/lib/data_models/onboarding_loader.dart

import 'package:flutter/material.dart';
import 'package:smooth_app/data_models/onboarding_data_knowledge_panels.dart';
import 'package:smooth_app/data_models/onboarding_data_product.dart';
import 'package:smooth_app/database/local_database.dart';
import 'package:smooth_app/pages/onboarding/onboarding_flow_navigator.dart';
import 'package:smooth_app/widgets/loading_dialog.dart';

/// Helper around data we download, store and reuse at onboarding.
class OnboardingLoader {
  OnboardingLoader(this._localDatabase);

  final LocalDatabase _localDatabase;

  /// To be called first thing when we click on "next" during onboarding.
  Future<void> runAtNextTime(
    final OnboardingPage page,
    final BuildContext context,
  ) async {
    switch (page) {
      case OnboardingPage.WELCOME:
        await LoadingDialog.run<void>(
          context: context,
          future: _downloadData(),
          title: 'Loading internet data', // TODO(monsieurtanuki): localize
        );
        return;
      case OnboardingPage.NOT_STARTED:
      case OnboardingPage.SCAN_EXAMPLE:
      case OnboardingPage.HEALTH_CARD_EXAMPLE:
      case OnboardingPage.ECO_CARD_EXAMPLE:
      case OnboardingPage.PREFERENCES_PAGE:
        return;
      case OnboardingPage.ONBOARDING_COMPLETE:
        await _unloadData();
        return;
    }
  }

  /// Actual download of all data.
  Future<void> _downloadData() async {
    await OnboardingDataProduct(_localDatabase).downloadData();
    await OnboardingDataKnowledgePanels(_localDatabase).downloadData();
  }

  /// Unloads all data that are no longer required.
  Future<void> _unloadData() async {
    await OnboardingDataProduct(_localDatabase).clear();
    await OnboardingDataKnowledgePanels(_localDatabase).clear();
  }
}