如何通过 Node.js 的 Telegram 数据库库（TDLib）请求用户的所有聊天/群组

Question

The official example from telegram explains that in order to use getChats() command, one needs to set two parameters ' offset_order ' and ' offset_chat_id '. I'm using this node.js wrapper for the TDLib . So when I use getChats() with the following params:

'offset_order': '9223372036854775807',
'offset_chat_id': 0,
'limit': 100

just like it is explained in the official docs :

For example, to get a list of chats from the beginning, the offset_order should be equal to 2^63 - 1

as a result I get 100 chats from the top of the user's list.

What I can't understand is how do I iterate through that list? How do I use the API pagination?

When I try to enter a legitimate chat_id from the middle of the first 100, I still get the same first 100, so it seems like it makes no difference.

If I change that offset_order to ANY other number, I get an empty list of chats in return...

Completely lost here, as every singleexample I found says the same thing as the official docs, ie how to get the first 100.

Answer 1

Had the same problem, have tried different approaches and re-read documentation for a long time, and here is a decision:

1. do getChats as you do with '9223372036854775807' offset_order parameter
2. do getChat request with id of the last chat you have got. It's an offline request, just to tdlib.
3. here you get a chat object with positions property - get a position from here, looks like this:

  positions: [
    {
      _: 'chatPosition',
      list: [Object],
      order: '6910658003385450706',
      is_pinned: false
    }
  ],

4. next request - getChats - use the positions[0].order from (3) as offset_order
5. goto (2) if there are more chats

It wasn't easy to come to this, so would be glad if it helps anybody who came from google like me :)