Dart version of the Tachiyomi algorithm used to generate source ids.

tachiyomi_generate_id.dart

import 'dart:convert';
import 'dart:math';

import 'package:crypto/crypto.dart';

int generateId(String name, String lang, int versionId) {
  String key = "${name.toLowerCase()}/$lang/$versionId";
  List<int> bytes = md5.convert(utf8.encode(key)).bytes;

  int result = 0;
  for (int i = 0; i < 8; i++) {
    result |= (bytes[i] & 0xff) << (8 * (7 - i));
  }
  return result & (pow(2, 63).toInt() - 1);
}