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use serde::{Deserialize, Serialize};
/// Identifier of a user.
#[derive(Clone, Copy)]
#[derive(Debug, derive_more::Display)]
#[derive(PartialEq, Eq, PartialOrd, Ord, Hash)]
#[derive(Serialize, Deserialize)]
#[serde(transparent)]
pub struct UserId(pub u64);
impl UserId {
/// Returns an URL that links to the user with this id in the form of
/// `tg://user/?id=<...>`.
#[must_use]
pub fn url(self) -> url::Url {
url::Url::parse(&format!("tg://user/?id={self}")).unwrap()
}
/// Returns `true` if this is the id of the special user used by telegram
/// bot API to denote an anonymous user that sends messages on behalf of
/// a group.
#[must_use]
pub fn is_anonymous(self) -> bool {
// https://github.com/tdlib/td/blob/4791fb6a2af0257f6cad8396e10424a79ee5f768/td/telegram/ContactsManager.cpp#L4941-L4943
const ANON_ID: UserId = UserId(1087968824);
self == ANON_ID
}
/// Returns `true` if this is the id of the special user used by telegram
/// bot API to denote an anonymous user that sends messages on behalf of
/// a channel.
#[must_use]
pub fn is_channel(self) -> bool {
// https://github.com/tdlib/td/blob/4791fb6a2af0257f6cad8396e10424a79ee5f768/td/telegram/ContactsManager.cpp#L4945-L4947
const ANON_CHANNEL_ID: UserId = UserId(136817688);
self == ANON_CHANNEL_ID
}
/// Returns `true` if this is the id of the special user used by telegram
/// itself.
///
/// It is sometimes also used as a fallback, for example when a channel post
/// is automatically forwarded to a group, bots in a group will get a
/// message where `from` is the Telegram user.
#[must_use]
pub fn is_telegram(self) -> bool {
const TELEGRAM_USER_ID: UserId = UserId(777000);
self == TELEGRAM_USER_ID
}
}
#[cfg(test)]
mod tests {
use serde::{Deserialize, Serialize};
use crate::types::UserId;
/// Test that `UserId` is serialized as the underlying integer
#[test]
fn deser() {
let user_id = S { user_id: UserId(17) };
let json = r#"{"user_id":17}"#;
#[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
struct S {
user_id: UserId,
}
assert_eq!(serde_json::to_string(&user_id).unwrap(), json);
assert_eq!(user_id, serde_json::from_str(json).unwrap());
}
#[test]
fn url_works() {
let id = UserId(17);
assert_eq!(id.url(), "tg://user/?id=17".parse().unwrap());
}
}