import 'dart:io';

class ReadData {
  static const prefix = 'lib/data/';

  static Future<List<String>> readFileString(String classString) async {
    var fileName = prefix + classString.toLowerCase() + '.data';
    var file = File(fileName);
    var contents = <String>[];

    // print('open file "$fileName"');
    if (await file.exists()) {
      contents = await File(fileName).readAsLines();
    } else {
      print('File "$fileName" not found.');
    }
    return contents;
  }

  static Future<List<num>> readFileNum(String classString) async {
    var fileName = prefix + classString.toLowerCase() + '.data';
    var file = File(fileName);
    var contents = <num>[];

    // print('open file "$fileName"');
    if (await file.exists()) {
      var contentStrings = await File(fileName).readAsLines();
      contents = contentStrings.map(num.parse).toList(); 
    } else {
      print('File "$fileName" not found.');
    }
    return contents;
  }
}