Generate Sales Id

gistfile1.txt

import 'dart:math';

class Generator {
  static String generateSalesId() {
    List<String> words = [
      "A",
      "P",
      "L",
      "I",
      "K",
      "U",
      "N",
      "Q",
      "D",
      "E"
    ];
    
    String time = DateTime.now().millisecondsSinceEpoch.toString();
    List<String> timeChars = time.split("");

    List<int> changes = [];
    int max = timeChars.length;
    int min = 1;

    for (int i = 0; i < timeChars.length ~/ 2; i++) {
      int index = Random().nextInt(max - min + 1) + min;
      if (!changes.contains(index)) changes.add(index);
    }

    StringBuffer value = StringBuffer();
    for (int i = 0; i < timeChars.length; i++) {
      if (timeChars[i] != '') {
        if (changes.contains(i)) {
          value.write(words[int.parse(timeChars[i])]); 
        } else {
          value.write(timeChars[i]);
        }
      }
    }

    return value.toString();
  }
}

void main() {
  print('SalesId: ${Generator.generateSalesId()}');
}