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::{
8        MessageType, OriginalSyncRoomMessageEvent, TextMessageEventContent,
9    },
10};
11use url::Url;
12
13async fn on_room_message(event: OriginalSyncRoomMessageEvent, room: Room, image: Vec<u8>) {
14    if room.state() != RoomState::Joined {
15        return;
16    }
17    let MessageType::Text(text_content) = event.content.msgtype else { return };
18
19    if text_content.body.contains("!image") {
20        println!("sending image");
21        room.send_attachment(
22            "cat.jpg",
23            &mime::IMAGE_JPEG,
24            image,
25            AttachmentConfig::new().caption(Some(TextMessageEventContent::plain("my pretty cat"))),
26        )
27        .await
28        .unwrap();
29
30        println!("message sent");
31    }
32}
33
34async fn login_and_sync(
35    homeserver_url: String,
36    username: String,
37    password: String,
38    image: Vec<u8>,
39) -> matrix_sdk::Result<()> {
40    let homeserver_url = Url::parse(&homeserver_url).expect("Couldn't parse the homeserver URL");
41    let client = Client::new(homeserver_url).await.unwrap();
42
43    client
44        .matrix_auth()
45        .login_username(&username, &password)
46        .initial_device_display_name("command bot")
47        .await?;
48
49    let response = client.sync_once(SyncSettings::default()).await.unwrap();
50
51    client.add_event_handler(move |ev, room| on_room_message(ev, room, image));
52
53    let settings = SyncSettings::default().token(response.next_batch);
54    client.sync(settings).await?;
55
56    Ok(())
57}
58
59#[tokio::main]
60async fn main() -> anyhow::Result<()> {
61    tracing_subscriber::fmt::init();
62    let (Some(homeserver_url), Some(username), Some(password), Some(image_path)) =
63        (env::args().nth(1), env::args().nth(2), env::args().nth(3), env::args().nth(4))
64    else {
65        eprintln!(
66            "Usage: {} <homeserver_url> <username> <password> <image>",
67            env::args().next().unwrap()
68        );
69        exit(1)
70    };
71
72    println!("helloooo {homeserver_url} {username} {password} {image_path:#?}");
73    let image = fs::read(&image_path).expect("Can't open image file.");
74
75    login_and_sync(homeserver_url, username, password, image).await?;
76    Ok(())
77}
example_image_bot/main.rs

example_image_bot/
main.rs
