Jisho-Study-Tool/lib/services/jisho_api/kanji_search.dart

import 'package:unofficial_jisho_api/api.dart' as jisho;
export 'package:unofficial_jisho_api/api.dart' show KanjiResult;

String? _convertGrade(String grade) {
  const conversionTable = {
    'grade 1': '小1',
    'grade 2': '小2',
    'grade 3': '小3',
    'grade 4': '小4',
    'grade 5': '小5',
    'grade 6': '小6',
    'junior high': '中'
  };

  return conversionTable[grade];
}

// TODO: fix this logic

Future<jisho.KanjiResult> fetchKanji(String kanji) async {
  final result = await jisho.searchForKanji(kanji);
  if (result.data != null && result.data?.taughtIn != null)
    result.data!.taughtIn = _convertGrade(result.data!.taughtIn!);
  return result;
}