app/lib/my_tools/order.dart

var tmpPaodekuai2 = '''{{#source#-跑得快
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#}}''';

var orderPaodekuai2 = '''四川游戏家园-跑得快
房号:  108700   局数:  10局
结束时间:   2020-04-19 15:05:31
阿帝888:  -100
婚礼婚礼:  100''';

var orderPaodekuai2_1 = '''四川游戏家园-跑得快
房号:  379170   局数:  10局
结束时间:   2020-11-18 17:39:05
狂文颓废:  -100
张三:  100''';

var orderPaodekuai2_2 = '''四川游戏家园-跑得快
房号:  416189   局数:  10局
结束时间:   2020-11-20 21:02:55
时光流逝话藏:  -80
沉沦、:  80''';

var order2 = '''ㄣ熊猫四川麻将ㄣ 2020-10-17 22:01
二人一房  局8/8 回老家了看看

玩家小刀（ゅ≈房主≈ゅ）ID:3211739【78】
玩家人之初 ???? ?ID:400932310【-78】''';

var tmp2 = '''{{ㄣ#source#ㄣ #orderTime#
#dump#

玩家#person_1#ID:#id_1#【#amount_1#】
玩家#person_2#ID:#id_2#【#amount_2#】}}''';

var orderDuangouqia2 = '''四川游戏家园-二人断勾卡
房号:  599792   局数:  8局
结束时间:   2020-11-18 18:56
微笑_MF:  +15
芬芳_Fw:  -15''';

var tmpDuangouqia2 = '''{{#source#-二人断勾卡
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#}}''';

var orderDoushisi2 = '''四川游戏家园-斗十四
房号:  801673   局数:  8局
结束时间:   2020-11-18 17:54
红霞_3m:  +1880
乐永林13880806281邑雪农业:  -1880''';

var tmpDoushisi2 = '''{{#source#-斗十四
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#>0.1}}''';

var orderDuangouqiaXuezhanMajiang3 = '''四川游戏家园-断勾卡血战麻将
房号:  421617   局数:  8局
结束时间:   2020-11-18 19:19
无可不可:  +80
模棱两可:  +20
小鱼儿_RT:  -100''';

var tmpDuangouqiaXuezhanMajiang3 = '''{{#source#-断勾卡血战麻将
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#
#person_3#:  #amount_3#}}''';

var orderPaodekuai3 = '''四川游戏家园-跑得快
房号:  910618   局数:  10局
结束时间:   2020-11-18 19:21:33
小鱼儿_RT:  -10
模棱两可:  16
无可不可:  -6''';

var tmpPaodekuai3 = '''{{#source#-跑得快
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#
#person_3#:  #amount_3#}}''';

var orderDoushisi3 = '''四川游戏家园-斗十四
房号:  666541   局数:  8局
结束时间:   2020-11-18 19:23
张三:  +22400
无可不可:  -11200
模棱两可:  -11200''';

var tmpDoushisi3 = '''{{#source#-斗十四
房号:  #orderNo#   局数:  #dump#
结束时间:   #orderTime#
#person_1#:  #amount_1#
#person_2#:  #amount_2#
#person_3#:  #amount_3#>0.01}}''';

var tmpDuangouqia2_2 = '''{{#source#-二人断勾卡
房号：#orderNo#
底分：#dump1#
类型：#dump2#
结束时间：#orderTime#
玩家1:#person_1#(#id_1#) #amount_1#
玩家2:#person_2#(#id_2#) #amount_2#}}''';

var orderDuangouqia2_2 = '''四川游戏家园-二人断勾卡
房号：812784
底分：13
类型：8局
结束时间：2020-11-24 10:27
玩家1:Ly_eu(20852233) +338
玩家2:无可不可(22199143) -338''';

void main() {
  var info = parseString2(tmpDuangouqia2_2, orderDuangouqia2_2);
  print(info);
  var orders = parse2(info);
  print(orders);
}

class OrderStakeHolder2 {
  String name;
  int id;
  var amount;

  OrderStakeHolder2(String name, int id, int amount) {
    this.name = name;
    this.amount = amount;
    this.id = id;
  }

  @override
  String toString() {
    return '{\"name\": \"$name\", \"id\":$id,\"amount\": $amount}';
  }
}

class OrderInfo2 {
  String source; //订单来源
  String no; // 原订单号
  String time; //原下单时间
  OrderStakeHolder2 payer; //付款人
  OrderStakeHolder2 seller; //赢家
  double factor;

  @override
  String toString() {
    return '{\"source\": \"$source\", \"no\": \"$no\", \"time\": \"$time\", \"payer\": $payer, \"seller\": $seller, \"factor\": $factor}';
  }
}

Map<String, String> parseString2(String tmpl, String msg) {
  var counter = 0;
  tmpl = tmpl.replaceAll('\n', '\n ');
  msg = msg.replaceAll('\n', '\n ');
  while (tmpl.indexOf('  ', 0) > 0) {
    tmpl = tmpl.replaceAll('  ', ' ');
  }
  while (msg.indexOf('  ', 0) > 0) {
    msg = msg.replaceAll('  ', ' ');
  }

  var res = Map<String, String>();
  var keyStart = false;
  var searchingKey = false;
  String key;
  String val;
  var i = 0;
  var j = 0;
  while (i < tmpl.length) {
    counter++;
    if (counter > 2000) {
      return null;
    }

    if (tmpl[i] == '{') {
      i++;
      continue;
    } else if (!searchingKey && tmpl[i] == '}') {
      res[key] = val;
      return res;
    }
    if (!searchingKey && tmpl[i] == '>') {
      res[key] = val;
      val = tmpl.substring(i + 1, tmpl.length - 2);
      res['factor'] = val;
      i = tmpl.length - 2;
      return res;
    }
    if (tmpl[i] == '#') {
      i++;
      if (!keyStart) {
        keyStart = true;
        searchingKey = true;
        key = '';
        val = '';
        continue;
      } else {
        keyStart = false;
        continue;
      }
    }
    if (keyStart) {
      key = key + tmpl[i];
      i++;
      continue;
    }

    if (searchingKey) {
      for (; j < msg.length; j++) {
        counter++;
        if (counter > 2000) {
          return null;
        }
        if (msg[j] != tmpl[i]) {
          val = val + msg[j];
        } else {
          searchingKey = false;
          res[key] = val;
          i++;
          j++;
          break;
        }
        if (searchingKey) {
          searchingKey = false;
        }
      }
    } else {
      if (msg[j] == tmpl[i]) {
        j++;
        i++;
      } else {
        return null;
      }
    }
  }
  return null;
}

List<OrderInfo2> parse2(Map<String, String> info) {
  String orderSource;
  String orderTime;
  String orderNo;
  double factor;
  var balance = 0;

  if (info['source'] != null) {
    orderSource = info['source'];
  }

  if (info['orderNo'] != null) {
    orderNo = info['orderNo'];
  }

  if (info['factor'] != null) {
    factor = double.parse(info['factor']);
  } else {
    factor = 1;
  }

  if (info['orderTime'] == null) {
    var t = DateTime.now();
    orderTime =
    "${t.year.toString()}-${t.month.toString().padLeft(2, '0')}-${t.day.toString().padLeft(2, '0')} ${t.hour.toString().padLeft(2, '0')}:${t.minute.toString().padLeft(2, '0')}:${t.second.toString().padLeft(2, '0')}";
  } else {
    if (info['orderTime'].length <= 16) {
      orderTime = info['orderTime'] + ':00';
    } else {
      orderTime = info['orderTime'];
    }
  }

  var sellers = List<OrderStakeHolder2>();
  var payers = List<OrderStakeHolder2>();
  var ks = info.keys.toList();
  for (var p in ks) {
    var i = p.indexOf('person');
    if (i >= 0) {
      var name = info[p];
      var pno = p.substring(i + 'person_'.length);
      var val = int.parse(info['amount_' + pno]);
      var id;
      id = 0;
      if (info['id_' + pno] != null) {
        id = int.parse(info['id_' + pno]);
      }
      if (!(val is int)) {
        return null;
      }
      balance += val;
      if (val > 0) {
        sellers.add(OrderStakeHolder2(name, id, val));
      } else if (val == 0) {
        continue;
      } else {
        payers.add(OrderStakeHolder2(name, id, -val));
      }
    } else {
      continue;
    }
  }

  if (balance != 0) {
    return null;
  }

  sellers.sort((left, right) => left.amount.compareTo(right.amount));
  payers.sort((left, right) => right.amount.compareTo(left.amount));

  var orders = List<OrderInfo2>();
  for (var p in payers) {
    var left = p.amount;
    var settled = List<OrderStakeHolder2>();
    var i = 0;
    while (left > 0) {
      var seller = sellers[i];

      if (seller.amount <= left) {
        var o = OrderInfo2();
        o.source = orderSource;
        o.time = orderTime;
        o.no = orderNo;
        o.payer = OrderStakeHolder2(p.name, p.id, seller.amount);
        o.seller = OrderStakeHolder2(seller.name, seller.id, seller.amount);
        o.factor = factor;
        orders.add(o);
        left = left - seller.amount;
        settled.add(seller);
      } else {
        var o = OrderInfo2();
        o.source = orderSource;
        o.time = orderTime;
        o.no = orderNo;
        o.payer = OrderStakeHolder2(p.name, p.id, left);
        o.seller = OrderStakeHolder2(seller.name, seller.id, left);
        o.factor = factor;
        orders.add(o);

        seller.amount -= left;
        left = 0;
      }
      i++;
    }
    for (var s in settled) {
      sellers.remove(s);
    }
  }
  return orders;
}

String computeOrderHash(Map<String, String> order) {
  order.remove("dump");
  order.remove('orderTime');
  var sortedKeys = order.keys.toList()..sort();
  List values = new List();
  sortedKeys.forEach((key) {
    values.add(order[key]);
  });
  values.sort();
  return '${values.toString().hashCode}';
}