flutter-sport/lib/utils/version.dart

import 'package:sport/services/Converter.dart';

List<int> version(String versionName) {
  if (versionName.isEmpty == true) return [0, 0, 0];
  var arr = versionName.split(".");
  while (arr.length < 3) arr.add("0");
  return arr.map((e) => Converter.toInt(e)).toList();
}

/**
 * v1: local
 * v2: net
 */
int versionCompare(String v1, String v2) {
  if (v1 == v2) return 0;
  var clientVersion = version(v1);
  var baseVersion = version(v2);
  int client =
      (clientVersion[0] << 20) | (clientVersion[1] << 10) | clientVersion[2];
  int base = (baseVersion[0] << 20) | (baseVersion[1] << 10) | baseVersion[2];
  int result = 0;
  if (client > base) {
    result = 1;
  } else if (client == base) {
    result = 0;
  } else {
    result = -1;
  }
  print("versionCompare $clientVersion $baseVersion == $result");
  return result;
}