codemp/src/client.rs

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//! ### client
//!
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//! codemp client manager, containing grpc services
use std::sync::Arc;
use dashmap::DashMap;
use tokio::sync::mpsc;
use tonic::service::interceptor::InterceptedService;
use tonic::service::Interceptor;
use tonic::transport::{Channel, Endpoint};
use tonic::IntoRequest;
use uuid::Uuid;
use crate::proto::auth::auth_client::AuthClient;
use crate::{
api::controller::ControllerWorker,
cursor::worker::CursorWorker,
proto::{
common::Empty,
buffer::buffer_client::BufferClient,
cursor::cursor_client::CursorClient,
auth::{Token, WorkspaceJoinRequest},
workspace::workspace_client::WorkspaceClient,
},
workspace::Workspace
};
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/// codemp client manager
///
/// contains all required grpc services and the unique user id
/// will disconnect when dropped
/// can be used to interact with server
pub struct Client {
user_id: Uuid,
token_tx: Arc<tokio::sync::watch::Sender<Token>>,
workspaces: Arc<DashMap<String, Arc<Workspace>>>,
services: Arc<Services>
}
#[derive(Clone)]
pub(crate) struct ClientInterceptor {
token: tokio::sync::watch::Receiver<Token>
}
impl Interceptor for ClientInterceptor {
fn call(&mut self, mut request: tonic::Request<()>) -> Result<tonic::Request<()>, tonic::Status> {
if let Ok(token) = self.token.borrow().token.parse() {
request.metadata_mut().insert("auth", token);
}
Ok(request)
}
}
#[derive(Debug, Clone)]
pub(crate) struct Services {
pub(crate) workspace: WorkspaceClient<InterceptedService<Channel, ClientInterceptor>>,
pub(crate) buffer: BufferClient<InterceptedService<Channel, ClientInterceptor>>,
pub(crate) cursor: CursorClient<InterceptedService<Channel, ClientInterceptor>>,
pub(crate) auth: AuthClient<Channel>,
}
// TODO meno losco
fn parse_codemp_connection_string(string: &str) -> (String, String) {
let url = string.replace("codemp://", "");
let (host, workspace) = url.split_once('/').unwrap();
(format!("http://{}", host), workspace.to_string())
}
impl Client {
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/// instantiate and connect a new client
pub async fn new(dest: &str) -> crate::Result<Self> {
let (_host, _workspace_id) = parse_codemp_connection_string(dest);
let channel = Endpoint::from_shared(dest.to_string())?
.connect()
.await?;
let (token_tx, token_rx) = tokio::sync::watch::channel(
Token { token: "".to_string() }
);
let inter = ClientInterceptor { token: token_rx };
let buffer = BufferClient::with_interceptor(channel.clone(), inter.clone());
let cursor = CursorClient::with_interceptor(channel.clone(), inter.clone());
let workspace = WorkspaceClient::with_interceptor(channel.clone(), inter.clone());
let auth = AuthClient::new(channel);
let user_id = uuid::Uuid::new_v4();
Ok(Client {
user_id,
token_tx: Arc::new(token_tx),
workspaces: Arc::new(DashMap::default()),
services: Arc::new(Services { workspace, buffer, cursor, auth })
})
}
pub async fn login(&self, username: String, password: String, workspace_id: Option<String>) -> crate::Result<()> {
Ok(self.token_tx.send(
self.services.auth.clone()
.login(WorkspaceJoinRequest { username, password, workspace_id})
.await?
.into_inner()
)?)
}
/// join a workspace, returns an [tokio::sync::RwLock] to interact with it
pub async fn join_workspace(&mut self, workspace: &str) -> crate::Result<Arc<Workspace>> {
let ws_stream = self.services.workspace.clone().attach(Empty{}.into_request()).await?.into_inner();
let (tx, rx) = mpsc::channel(256);
let cur_stream = self.services.cursor.clone()
.attach(tokio_stream::wrappers::ReceiverStream::new(rx))
.await?
.into_inner();
let worker = CursorWorker::default();
let controller = Arc::new(worker.subscribe());
tokio::spawn(async move {
tracing::debug!("controller worker started");
worker.work(tx, cur_stream).await;
tracing::debug!("controller worker stopped");
});
let ws = Arc::new(Workspace::new(
workspace.to_string(),
self.user_id,
self.token_tx.clone(),
controller,
self.services.clone()
));
ws.fetch_users().await?;
ws.fetch_buffers().await?;
ws.run_actor(ws_stream);
self.workspaces.insert(workspace.to_string(), ws.clone());
Ok(ws)
}
pub fn get_workspace(&self, id: &str) -> Option<Arc<Workspace>> {
self.workspaces.get(id).map(|x| x.clone())
}
/// accessor for user id
pub fn user_id(&self) -> Uuid {
self.user_id
}
}