276 lines
10 KiB
Rust
276 lines
10 KiB
Rust
use chrono::DateTime;
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use livekit_api::{access_token::TokenVerifier, webhooks::WebhookReceiver};
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use livekit_protocol::TrackType;
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use revolt_database::{
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events::client::EventV1,
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iso8601_timestamp::{Duration, Timestamp},
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util::reference::Reference,
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voice::{
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create_voice_state, delete_voice_state, get_call_notification_recipients,
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get_user_moved_from_voice, get_user_moved_to_voice, get_voice_channel_members,
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set_channel_call_started_system_message, take_channel_call_started_system_message,
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update_voice_state_tracks, VoiceClient,
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},
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Database, PartialMessage, SystemMessage, AMQP,
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};
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use revolt_models::v0;
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use revolt_result::{Result, ToRevoltError};
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use rocket::{post, State};
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use rocket_empty::EmptyResponse;
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use ulid::Ulid;
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use crate::guard::AuthHeader;
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#[post("/<node>", data = "<body>")]
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pub async fn ingress(
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db: &State<Database>,
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voice_client: &State<VoiceClient>,
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amqp: &State<AMQP>,
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node: &str,
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auth_header: AuthHeader<'_>,
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body: &str,
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) -> Result<EmptyResponse> {
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log::debug!("received event: {body:?}");
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let config = revolt_config::config().await;
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let node_info = config
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.api
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.livekit
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.nodes
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.get(node)
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.to_internal_error()
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.inspect_err(|_| {
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log::error!("Unknown node {node}, make sure livekit has the correct node name set and matches `hosts.livekit` and `api.livekit.nodes` in the Revolt config.")
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})?;
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let webhook_receiver = WebhookReceiver::new(TokenVerifier::with_api_key(
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&node_info.key,
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&node_info.secret,
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));
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let event = webhook_receiver
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.receive(body, &auth_header)
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.to_internal_error()?;
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let channel_id = event.room.as_ref().map(|r| &r.name);
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let user_id = event.participant.as_ref().map(|r| &r.identity);
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match event.event.as_str() {
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// User joined a channel
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"participant_joined" => {
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let channel_id = channel_id.to_internal_error()?;
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let user_id = user_id.to_internal_error()?;
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let channel = Reference::from_unchecked(channel_id).as_channel(db).await?;
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let joined_at = Timestamp::UNIX_EPOCH
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.checked_add(Duration::seconds(event.created_at))
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.unwrap();
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let voice_state =
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create_voice_state(channel_id, channel.server(), user_id, joined_at).await?;
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// Only publish one event when a user is moved from one channel to another.
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if let Some(moved_from) = get_user_moved_to_voice(channel_id, user_id).await? {
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EventV1::VoiceChannelMove {
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user: user_id.to_string(),
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from: moved_from,
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to: channel_id.to_string(),
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state: voice_state,
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}
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.p(channel_id.to_string())
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.await;
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} else {
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EventV1::VoiceChannelJoin {
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id: channel_id.to_string(),
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state: voice_state,
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}
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.p(channel_id.to_string())
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.await;
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};
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// First user who joined - send call started system message.
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if event.room.as_ref().unwrap().num_participants == 1 {
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let user = Reference::from_unchecked(user_id).as_user(db).await?;
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let message_id =
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Ulid::from_datetime(DateTime::from_timestamp_secs(event.created_at).unwrap())
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.to_string();
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let mut call_started_message = SystemMessage::CallStarted {
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by: user_id.to_string(),
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finished_at: None,
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}
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.into_message(channel.id().to_string());
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call_started_message.id = message_id;
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set_channel_call_started_system_message(channel.id(), &call_started_message.id)
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.await?;
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call_started_message
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.send(
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db,
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Some(amqp),
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v0::MessageAuthor::System {
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username: &user.username,
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avatar: user.avatar.as_ref().map(|file| file.id.as_ref()),
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},
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None,
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None,
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&channel,
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false,
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)
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.await?;
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let recipients = get_call_notification_recipients(&channel_id, &user_id).await?;
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let now = joined_at.format_short().to_string();
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if let Err(e) = amqp
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.dm_call_updated(&user.id, channel.id(), Some(&now), false, recipients)
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.await
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{
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revolt_config::capture_error(&e);
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}
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}
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}
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// User left a channel
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"participant_left" => {
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let channel_id = channel_id.to_internal_error()?;
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let user_id = user_id.to_internal_error()?;
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let channel = Reference::from_unchecked(channel_id).as_channel(db).await?;
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delete_voice_state(channel_id, channel.server(), user_id).await?;
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// Dont send leave event when a user is moved
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if get_user_moved_from_voice(channel_id, user_id)
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.await?
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.is_none()
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{
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EventV1::VoiceChannelLeave {
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id: channel_id.clone(),
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user: user_id.clone(),
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}
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.p(channel_id.clone())
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.await;
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};
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// Update CallStarted system message if everyone has left with the end time
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let members = get_voice_channel_members(channel_id).await?;
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if members.is_none_or(|m| m.is_empty()) {
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// The channel is empty so send out an "end" message for ringing
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if let Err(e) = amqp
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.dm_call_updated(user_id, channel_id, None, true, None)
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.await
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{
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revolt_config::capture_internal_error!(&e);
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}
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if let Some(system_message_id) =
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take_channel_call_started_system_message(channel_id).await?
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{
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// Could have been deleted
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if let Ok(mut message) = Reference::from_unchecked(&system_message_id)
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.as_message(db)
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.await
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{
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if let Some(SystemMessage::CallStarted { finished_at, .. }) =
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&mut message.system
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{
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*finished_at = Some(Timestamp::now_utc());
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message
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.update(
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db,
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PartialMessage {
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system: message.system.clone(),
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..Default::default()
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},
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Vec::new(),
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)
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.await?;
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} else {
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log::error!("Broken State: Call started message ID ({}) does not contain a CallStarted system message.", &message.id)
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}
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};
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};
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}
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}
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// Audio/video track was started/stopped/unmuted/muted
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"track_published" | "track_unpublished" | "track_unmuted" | "track_muted" => {
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let channel_id = channel_id.to_internal_error()?;
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let user_id = user_id.to_internal_error()?;
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let track = event.track.as_ref().to_internal_error()?;
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let channel = Reference::from_unchecked(channel_id).as_channel(db).await?;
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let user = Reference::from_unchecked(user_id).as_user(db).await?;
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let user_limits = user.limits().await;
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// forbid any size which goes over the limit and also limit the aspect ratio to stop people from making too tall or too wide and bypassing the limit.
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// TODO: figure out how to track audio stream quality
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if event.event == "track_published" {
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let mut disconnect = false;
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if track.r#type == TrackType::Data as i32 {
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log::debug!("User published data");
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disconnect = true;
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};
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if track.r#type == TrackType::Video as i32 {
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if user_limits.video_resolution[0] != 0
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&& user_limits.video_resolution[1] != 0
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&& track.width * track.height
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> user_limits.video_resolution[0] * user_limits.video_resolution[1]
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{
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log::debug!("User published video with out of bounds resolution");
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disconnect = true;
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};
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if user_limits.video_aspect_ratio[0] != user_limits.video_aspect_ratio[1]
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&& !(user_limits.video_aspect_ratio[0]..=user_limits.video_aspect_ratio[1])
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.contains(&(track.width as f32 / track.height as f32))
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{
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log::debug!("User published video with out of bounds aspect ratio");
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disconnect = true;
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};
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};
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if disconnect {
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log::debug!("Removing user {user_id} from channel {channel_id} {event:?} due to forbidden track.");
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let _ = voice_client.remove_user(node, user_id, channel_id).await;
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delete_voice_state(channel_id, channel.server(), user_id).await?;
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return Ok(EmptyResponse);
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};
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};
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let partial = update_voice_state_tracks(
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channel_id,
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channel.server(),
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user_id,
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event.event == "track_published" || event.event == "track_unmuted", // to avoid duplicating this entire case twice
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track.source,
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)
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.await?;
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EventV1::UserVoiceStateUpdate {
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id: user_id.clone(),
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channel_id: channel_id.clone(),
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data: partial,
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}
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.p(channel_id.clone())
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.await;
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}
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_ => {}
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};
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Ok(EmptyResponse)
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}
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