Add support for cross-chat replies.

[ALiwoto]

New telegram update added a new feature called cross-chat replies: you can reply to messages which are sent in other chats.
Currently pyrogram cannot parse such messages (updates/commands will not get triggered; get_messages will raise InvalidMsgId exception, etc).

This pull request adds support for fetching cross-chat replies.

[alissonlauffer]

Thanks, but doesn't this require a schema update to work?

[ALiwoto]

Thanks, but doesn't this require a schema update to work?

Oh I thought your tl is updated to latest layer, let me see

[ALiwoto]

@alissonlauffer I just checked

https://github.com/AmanoTeam/pyrogram/blob/16cf07c5ad38085b2769bd86b46569ec254e3f3a/compiler/api/source/main_api.tl#L1267C114-L1267C130

looks like your scheme supports parsing reply_to_peer_id and reply_to (I did also put attribute checks just to be sure), so I think it will work.
What doesn't work is, you trying to reply cross-chat (e.g. you send a reply to another chat, which isn't supported in layer 162)
I didn't implement that here anyway

[ALiwoto]

Btw, I have also implemented cross-chat replies in send_message method (and similar methods, like send_animation and so on).
In this commit.

But that requires latest layer, so yeah.

[alissonlauffer]

I see that you added the is_cross_chat property to Message by using a setattr, which is not a good idea. The best approach here would be adding a new bool attribute to the Message object, and set it later with parsed_message.is_cross_chat = ....
Also, I'm not sure if these hasattrs are useful, since values that exist are None, and would thus break the condition.

Last thing, It'd be better if you use utils.get_channel_id(chat_id) instead of adding a leading -100 using a f-string, which also makes the chat_id become a string instead of an integer.

[alissonlauffer]

Ah, before I forget, do you know how does the bot API handles this? Since Pyrogram is intended to be a MTProto client with a similar API to that of the bot API.

[ALiwoto]

@alissonlauffer bot api doesn't handle this yet

[ALiwoto]

We have lots of bot api bots in our groups, one of them is a group management one
If you cross-reply a blacklisted word, the bot just won't get triggered

[ALiwoto]

Oh btw, about is_cross_chat attr, yeah, I was just doing that for debug purposes in my own fork, was planning to remove it later on, forgot
feel free to remove it

[alissonlauffer]

Well, I'll keep this PR open for a while, because it needs some manual changes, and I'm also a bit busy with a new project.