Initial commit

This commit is contained in:
Jonathan Flueren 2023-07-06 16:31:39 +02:00
commit e6d819d7a8
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name = "matrix-rust-bot"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at
anyhow = "1.0.71"
matrix-sdk = { git = "", package = "matrix-sdk" }
tokio = { version = "1.29.1", features = ["macros", "rt-multi-thread"] }
tracing-subscriber = "0.3.17"

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use std::{env, process::exit};
use matrix_sdk::{
message::{MessageType, OriginalSyncRoomMessageEvent, RoomMessageEventContent},
use tokio::time::{sleep, Duration};
async fn main() -> anyhow::Result<()> {
// parse the command line for homeserver, username and password
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),
_ => {
"Usage: {} <homeserver_url> <username> <password>",
// exist if missing
// our actual runner
login_and_sync(homeserver_url, &username, &password).await?;
// The core sync loop we have running.
async fn login_and_sync(
homeserver_url: String,
username: &str,
password: &str,
) -> anyhow::Result<()> {
// First, we set up the client.
// Note that when encryption is enabled, you should use a persistent store to be
// able to restore the session with a working encryption setup.
// See the `persist_session` example.
let client = Client::builder()
// We use the convenient client builder to set our custom homeserver URL on it.
// Then let's log that client in
.login_username(username, password)
.initial_device_display_name("getting started bot")
// It worked!
println!("logged in as {username}");
// Now, we want our client to react to invites. Invites sent us stripped member
// state events so we want to react to them. We add the event handler before
// the sync, so this happens also for older messages. All rooms we've
// already entered won't have stripped states anymore and thus won't fire
// 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
let sync_token = client.sync_once(SyncSettings::default()).await.unwrap().next_batch;
// now that we've synced, let's attach a handler for incoming room messages, so
// we can react on it
// since we called `sync_once` before we entered our sync loop we must pass
// that sync token to `sync`
let settings = SyncSettings::default().token(sync_token);
// this keeps state from the server streaming in to the bot via the
// EventHandler trait
client.sync(settings).await?; // this essentially loops until we kill the bot
// Whenever we see a new stripped room member event, we've asked our client to
// call this function. So what exactly are we doing then?
async fn on_stripped_state_member(
room_member: StrippedRoomMemberEvent,
client: Client,
room: Room,
) {
if room_member.state_key != client.user_id().unwrap() {
// the invite we've seen isn't for us, but for someone else. ignore
// looks like the room is an invited room, let's attempt to join then
if let Room::Invited(room) = room {
// The event handlers are called before the next sync begins, but
// methods that change the state of a room (joining, leaving a room)
// wait for the sync to return the new room state so we need to spawn
// a new task for them.
tokio::spawn(async move {
println!("Autojoining room {}", room.room_id());
let mut delay = 2;
while let Err(err) = room.accept_invitation().await {
// retry autojoin due to synapse sending invites, before the
// invited user can join for more information see
eprintln!("Failed to join room {} ({err:?}), retrying in {delay}s", room.room_id());
delay *= 2;
if delay > 3600 {
eprintln!("Can't join room {} ({err:?})", room.room_id());
println!("Successfully joined room {}", room.room_id());
// This fn is called whenever we see a new room message event. You notice that
// the difference between this and the other function that we've given to the
// handler lies only in their input parameters. However, that is enough for the
// rust-sdk to figure out which one to call one and only do so, when
// the parameters are available.
async fn on_room_message(event: OriginalSyncRoomMessageEvent, room: Room) {
// First, we need to unpack the message: We only want messages from rooms we are
// still in and that are regular text messages - ignoring everything else.
let Room::Joined(room) = room else { return };
let MessageType::Text(text_content) = event.content.msgtype else { return };
// here comes the actual "logic": when the bot see's a `!party` in the message,
// it responds
if text_content.body.contains("!party") {
let content = RoomMessageEventContent::text_plain("🎉🎊🥳 let's PARTY!! 🥳🎊🎉");
// send our message to the room we found the "!party" command in
// the last parameter is an optional transaction id which we don't
// care about.
room.send(content, None).await.unwrap();
println!("message sent");