example_autojoin/
main.rs

1use std::{env, process::exit};
2
3use matrix_sdk::{
4    Client, Room, config::SyncSettings, ruma::events::room::member::StrippedRoomMemberEvent,
5};
6use tokio::time::{Duration, sleep};
7
8async fn on_stripped_state_member(
9    room_member: StrippedRoomMemberEvent,
10    client: Client,
11    room: Room,
12) {
13    if room_member.state_key != client.user_id().unwrap() {
14        return;
15    }
16
17    tokio::spawn(async move {
18        println!("Autojoining room {}", room.room_id());
19        let mut delay = 2;
20
21        while let Err(err) = room.join().await {
22            // retry autojoin due to synapse sending invites, before the
23            // invited user can join for more information see
24            // https://github.com/matrix-org/synapse/issues/4345
25            eprintln!("Failed to join room {} ({err:?}), retrying in {delay}s", room.room_id());
26
27            sleep(Duration::from_secs(delay)).await;
28            delay *= 2;
29
30            if delay > 3600 {
31                eprintln!("Can't join room {} ({err:?})", room.room_id());
32                break;
33            }
34        }
35        println!("Successfully joined room {}", room.room_id());
36    });
37}
38
39async fn login_and_sync(
40    homeserver_url: String,
41    username: &str,
42    password: &str,
43) -> anyhow::Result<()> {
44    // Note that when encryption is enabled, you should use a persistent store to be
45    // able to restore the session with a working encryption setup.
46    // See the `persist_session` example.
47    let client = Client::builder().homeserver_url(homeserver_url).build().await?;
48
49    client
50        .matrix_auth()
51        .login_username(username, password)
52        .initial_device_display_name("autojoin bot")
53        .await?;
54
55    println!("logged in as {username}");
56
57    client.add_event_handler(on_stripped_state_member);
58
59    client.sync(SyncSettings::default()).await?;
60
61    Ok(())
62}
63
64#[tokio::main]
65async fn main() -> anyhow::Result<()> {
66    tracing_subscriber::fmt::init();
67
68    // parse the command line for homeserver, username and password
69    let (Some(homeserver_url), Some(username), Some(password)) =
70        (env::args().nth(1), env::args().nth(2), env::args().nth(3))
71    else {
72        eprintln!("Usage: {} <homeserver_url> <username> <password>", env::args().next().unwrap());
73        exit(1)
74    };
75
76    login_and_sync(homeserver_url, &username, &password).await?;
77    Ok(())
78}
example_autojoin/main.rs

example_autojoin/
main.rs
