matrix-rust-sdk/matrix_sdk/examples/command_bot.rs

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use std::{env, process::exit};
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use matrix_sdk::{
self,
events::room::message::{MessageEvent, MessageEventContent, TextMessageEventContent},
Client, ClientConfig, EventEmitter, JsonStore, RoomState, SyncSettings,
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};
use url::Url;
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struct CommandBot {
/// This clone of the `Client` will send requests to the server,
/// while the other keeps us in sync with the server using `sync_forever`.
client: Client,
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}
impl CommandBot {
pub fn new(client: Client) -> Self {
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Self { client }
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}
}
#[async_trait::async_trait]
impl EventEmitter for CommandBot {
async fn on_room_message(&self, room: RoomState, event: &MessageEvent) {
if let RoomState::Joined(room) = room {
let msg_body = if let MessageEvent {
content: MessageEventContent::Text(TextMessageEventContent { body: msg_body, .. }),
..
} = event
{
msg_body.clone()
} else {
String::new()
};
if msg_body.contains("!party") {
let content = MessageEventContent::Text(TextMessageEventContent {
body: "🎉🎊🥳 let's PARTY!! 🥳🎊🎉".to_string(),
format: None,
formatted_body: None,
relates_to: None,
});
// we clone here to hold the lock for as little time as possible.
let room_id = room.read().await.room_id.clone();
println!("sending");
self.client
// send our message to the room we found the "!party" command in
// the last parameter is an optional Uuid which we don't care about.
.room_send(&room_id, content, None)
.await
.unwrap();
println!("message sent");
}
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}
}
}
async fn login_and_sync(
homeserver_url: String,
username: String,
password: String,
) -> Result<(), matrix_sdk::Error> {
// the location for `JsonStore` to save files to
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let mut home = dirs::home_dir().expect("no home directory found");
home.push("party_bot");
let store = JsonStore::open(&home)?;
let client_config = ClientConfig::new()
.proxy("http://localhost:8080")?
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.disable_ssl_verification()
.state_store(Box::new(store));
let homeserver_url = Url::parse(&homeserver_url).expect("Couldn't parse the homeserver URL");
// create a new Client with the given homeserver url and config
let mut client = Client::new_with_config(homeserver_url, None, client_config).unwrap();
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client
.login(
username.clone(),
password,
None,
Some("command bot".to_string()),
)
.await?;
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println!("logged in as {}", username);
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// An initial sync to set up state and so our bot doesn't respond to old messages.
// If the `StateStore` finds saved state in the location given the initial sync will
// be skipped in favor of loading state from the store
client.sync(SyncSettings::default()).await.unwrap();
// add our CommandBot to be notified of incoming messages, we do this after the initial
// sync to avoid responding to messages before the bot was running.
client
.add_event_emitter(Box::new(CommandBot::new(client.clone())))
.await;
// since we called sync before we `sync_forever` we must pass that sync token to
// `sync_forever`
let settings = SyncSettings::default().token(client.sync_token().await.unwrap());
// this keeps state from the server streaming in to CommandBot via the EventEmitter trait
client.sync_forever(settings, |_| async {}).await;
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Ok(())
}
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#[tokio::main]
async fn main() -> Result<(), matrix_sdk::Error> {
tracing_subscriber::fmt::init();
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let (homeserver_url, username, password) =
match (env::args().nth(1), env::args().nth(2), env::args().nth(3)) {
(Some(a), Some(b), Some(c)) => (a, b, c),
_ => {
eprintln!(
"Usage: {} <homeserver_url> <username> <password>",
env::args().next().unwrap()
);
exit(1)
}
};
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login_and_sync(homeserver_url, username, password).await?;
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Ok(())
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}