example_image_bot/
main.rs

1use std::{env, fs, process::exit};
2
3use matrix_sdk::{
4    Client, Room, RoomState,
5    attachment::AttachmentConfig,
6    config::SyncSettings,
7    ruma::events::room::message::{MessageType, OriginalSyncRoomMessageEvent},
8};
9use url::Url;
10
11async fn on_room_message(event: OriginalSyncRoomMessageEvent, room: Room, image: Vec<u8>) {
12    if room.state() != RoomState::Joined {
13        return;
14    }
15    let MessageType::Text(text_content) = event.content.msgtype else { return };
16
17    if text_content.body.contains("!image") {
18        println!("sending image");
19        room.send_attachment(
20            "cat.jpg",
21            &mime::IMAGE_JPEG,
22            image,
23            AttachmentConfig::new().caption(Some("my pretty cat".to_owned())),
24        )
25        .await
26        .unwrap();
27
28        println!("message sent");
29    }
30}
31
32async fn login_and_sync(
33    homeserver_url: String,
34    username: String,
35    password: String,
36    image: Vec<u8>,
37) -> matrix_sdk::Result<()> {
38    let homeserver_url = Url::parse(&homeserver_url).expect("Couldn't parse the homeserver URL");
39    let client = Client::new(homeserver_url).await.unwrap();
40
41    client
42        .matrix_auth()
43        .login_username(&username, &password)
44        .initial_device_display_name("command bot")
45        .await?;
46
47    let response = client.sync_once(SyncSettings::default()).await.unwrap();
48
49    client.add_event_handler(move |ev, room| on_room_message(ev, room, image));
50
51    let settings = SyncSettings::default().token(response.next_batch);
52    client.sync(settings).await?;
53
54    Ok(())
55}
56
57#[tokio::main]
58async fn main() -> anyhow::Result<()> {
59    tracing_subscriber::fmt::init();
60    let (Some(homeserver_url), Some(username), Some(password), Some(image_path)) =
61        (env::args().nth(1), env::args().nth(2), env::args().nth(3), env::args().nth(4))
62    else {
63        eprintln!(
64            "Usage: {} <homeserver_url> <username> <password> <image>",
65            env::args().next().unwrap()
66        );
67        exit(1)
68    };
69
70    println!("helloooo {homeserver_url} {username} {password} {image_path:#?}");
71    let image = fs::read(&image_path).expect("Can't open image file.");
72
73    login_and_sync(homeserver_url, username, password, image).await?;
74    Ok(())
75}
example_image_bot/main.rs

example_image_bot/
main.rs
