stack_wallet/lib/services/buy/buy_data_loading_service.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:stackwallet/providers/providers.dart';
import 'package:stackwallet/services/buy/simplex/simplex_api.dart';
import 'package:stackwallet/utilities/logger.dart';

class BuyDataLoadingService {
  Future<void> loadAll(WidgetRef ref) async {
    try {
      await Future.wait([
        _loadSimplexCurrencies(ref),
      ]);
    } catch (e, s) {
      Logging.instance.log("BuyDataLoadingService.loadAll failed: $e\n$s",
          level: LogLevel.Error);
    }
  }

  Future<void> _loadSimplexCurrencies(WidgetRef ref) async {
    bool error = false;
    // if (ref.read(simplexLoadStatusStateProvider.state).state ==
    //     SimplexLoadStatus.loading) {
    //   // already in progress so just
    //   return;
    // }

    ref.read(simplexLoadStatusStateProvider.state).state =
        SimplexLoadStatus.loading;

    final response = await SimplexAPI.instance.getSupported();

    if (response['supportedCryptos'] != null) {
      ref
          .read(supportedSimplexCurrenciesProvider)
          .updateSupportedCryptos(response['supportedCryptos']);
    } else {
      error = true;
      Logging.instance.log(
        "_loadSimplexCurrencies: $response",
        level: LogLevel.Warning,
      );
    }

    if (response['supportedFiats'] != null) {
      ref
          .read(supportedSimplexCurrenciesProvider)
          .updateSupportedFiats(response['supportedFiats']);
    } else {
      error = true;
      Logging.instance.log(
        "_loadSimplexCurrencies: $response",
        level: LogLevel.Warning,
      );
    }

    if (error) {
      // _loadSimplexCurrencies() again?
    } else {
      ref.read(simplexLoadStatusStateProvider.state).state =
          SimplexLoadStatus.success;
    }
  }
}