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, async_trait,
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events::{
room::message::{MessageEventContent, TextMessageEventContent},
AnyMessageEventContent, SyncMessageEvent,
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},
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Client, ClientConfig, EventEmitter, 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`.
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]
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impl EventEmitter for CommandBot {
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async fn on_room_message(
&self,
room: RoomState,
event: &SyncMessageEvent<MessageEventContent>,
) {
if let RoomState::Joined(room) = room {
let msg_body = if let SyncMessageEvent {
content: MessageEventContent::Text(TextMessageEventContent { body: msg_body, .. }),
..
} = event
{
msg_body.clone()
} else {
String::new()
};
if msg_body.contains("!party") {
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let content = AnyMessageEventContent::RoomMessage(MessageEventContent::text_plain(
"🎉🎊🥳 let's PARTY!! 🥳🎊🎉",
));
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.
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.room_send(room.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 client_config = ClientConfig::new().store_path(home);
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
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let client = Client::new_with_config(homeserver_url, client_config).unwrap();
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client
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.login(&username, &password, None, Some("command bot"))
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.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_once(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_once` before we entered our sync loop we must pass
// that sync token to `sync`
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(settings).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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}