mirror of
https://github.com/zed-industries/zed.git
synced 2024-10-28 01:07:09 +00:00
bc63fca8d7
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
276 lines
7.4 KiB
Rust
276 lines
7.4 KiB
Rust
use super::{ConnectionId, PeerId, TypedEnvelope};
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use anyhow::Result;
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use async_tungstenite::tungstenite::{Error as WebSocketError, Message as WebSocketMessage};
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use futures::{SinkExt as _, StreamExt as _};
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use prost::Message;
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use std::any::{Any, TypeId};
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use std::{
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io,
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time::{Duration, SystemTime, UNIX_EPOCH},
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};
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include!(concat!(env!("OUT_DIR"), "/zed.messages.rs"));
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pub trait EnvelopedMessage: Clone + Sized + Send + Sync + 'static {
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const NAME: &'static str;
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fn into_envelope(
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self,
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id: u32,
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responding_to: Option<u32>,
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original_sender_id: Option<u32>,
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) -> Envelope;
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fn from_envelope(envelope: Envelope) -> Option<Self>;
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}
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pub trait EntityMessage: EnvelopedMessage {
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fn remote_entity_id(&self) -> u64;
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}
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pub trait RequestMessage: EnvelopedMessage {
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type Response: EnvelopedMessage;
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}
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pub trait AnyTypedEnvelope: 'static + Send + Sync {
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fn payload_type_id(&self) -> TypeId;
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fn payload_type_name(&self) -> &'static str;
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fn as_any(&self) -> &dyn Any;
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fn into_any(self: Box<Self>) -> Box<dyn Any + Send + Sync>;
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}
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impl<T: EnvelopedMessage> AnyTypedEnvelope for TypedEnvelope<T> {
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fn payload_type_id(&self) -> TypeId {
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TypeId::of::<T>()
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}
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fn payload_type_name(&self) -> &'static str {
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T::NAME
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}
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fn as_any(&self) -> &dyn Any {
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self
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}
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fn into_any(self: Box<Self>) -> Box<dyn Any + Send + Sync> {
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self
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}
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}
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macro_rules! messages {
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($($name:ident),* $(,)?) => {
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pub fn build_typed_envelope(sender_id: ConnectionId, envelope: Envelope) -> Option<Box<dyn AnyTypedEnvelope>> {
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match envelope.payload {
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$(Some(envelope::Payload::$name(payload)) => {
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Some(Box::new(TypedEnvelope {
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sender_id,
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original_sender_id: envelope.original_sender_id.map(PeerId),
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message_id: envelope.id,
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payload,
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}))
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}, )*
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_ => None
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}
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}
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$(
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impl EnvelopedMessage for $name {
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const NAME: &'static str = std::stringify!($name);
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fn into_envelope(
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self,
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id: u32,
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responding_to: Option<u32>,
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original_sender_id: Option<u32>,
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) -> Envelope {
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Envelope {
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id,
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responding_to,
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original_sender_id,
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payload: Some(envelope::Payload::$name(self)),
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}
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}
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fn from_envelope(envelope: Envelope) -> Option<Self> {
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if let Some(envelope::Payload::$name(msg)) = envelope.payload {
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Some(msg)
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} else {
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None
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}
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}
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}
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)*
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};
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}
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macro_rules! request_messages {
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($(($request_name:ident, $response_name:ident)),* $(,)?) => {
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$(impl RequestMessage for $request_name {
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type Response = $response_name;
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})*
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};
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}
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macro_rules! entity_messages {
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($id_field:ident, $($name:ident),* $(,)?) => {
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$(impl EntityMessage for $name {
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fn remote_entity_id(&self) -> u64 {
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self.$id_field
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}
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})*
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};
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}
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messages!(
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AddPeer,
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BufferSaved,
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ChannelMessageSent,
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CloseBuffer,
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CloseWorktree,
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GetChannelMessages,
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GetChannelMessagesResponse,
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GetChannels,
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GetChannelsResponse,
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GetUsers,
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GetUsersResponse,
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JoinChannel,
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JoinChannelResponse,
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LeaveChannel,
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OpenBuffer,
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OpenBufferResponse,
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OpenWorktree,
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OpenWorktreeResponse,
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Ping,
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Pong,
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RemovePeer,
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SaveBuffer,
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SendChannelMessage,
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SendChannelMessageResponse,
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ShareWorktree,
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ShareWorktreeResponse,
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UpdateBuffer,
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UpdateWorktree,
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);
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request_messages!(
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(GetChannels, GetChannelsResponse),
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(GetUsers, GetUsersResponse),
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(JoinChannel, JoinChannelResponse),
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(OpenBuffer, OpenBufferResponse),
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(OpenWorktree, OpenWorktreeResponse),
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(Ping, Pong),
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(SaveBuffer, BufferSaved),
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(ShareWorktree, ShareWorktreeResponse),
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(SendChannelMessage, SendChannelMessageResponse),
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(GetChannelMessages, GetChannelMessagesResponse),
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);
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entity_messages!(
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worktree_id,
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AddPeer,
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BufferSaved,
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CloseBuffer,
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CloseWorktree,
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OpenBuffer,
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OpenWorktree,
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RemovePeer,
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SaveBuffer,
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UpdateBuffer,
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UpdateWorktree,
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);
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entity_messages!(channel_id, ChannelMessageSent);
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/// A stream of protobuf messages.
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pub struct MessageStream<S> {
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stream: S,
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}
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impl<S> MessageStream<S> {
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pub fn new(stream: S) -> Self {
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Self { stream }
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}
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pub fn inner_mut(&mut self) -> &mut S {
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&mut self.stream
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}
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}
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impl<S> MessageStream<S>
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where
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S: futures::Sink<WebSocketMessage, Error = WebSocketError> + Unpin,
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{
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/// Write a given protobuf message to the stream.
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pub async fn write_message(&mut self, message: &Envelope) -> Result<(), WebSocketError> {
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let mut buffer = Vec::with_capacity(message.encoded_len());
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message
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.encode(&mut buffer)
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.map_err(|err| io::Error::from(err))?;
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self.stream.send(WebSocketMessage::Binary(buffer)).await?;
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Ok(())
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}
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}
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impl<S> MessageStream<S>
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where
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S: futures::Stream<Item = Result<WebSocketMessage, WebSocketError>> + Unpin,
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{
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/// Read a protobuf message of the given type from the stream.
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pub async fn read_message(&mut self) -> Result<Envelope, WebSocketError> {
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while let Some(bytes) = self.stream.next().await {
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match bytes? {
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WebSocketMessage::Binary(bytes) => {
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let envelope = Envelope::decode(bytes.as_slice()).map_err(io::Error::from)?;
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return Ok(envelope);
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}
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WebSocketMessage::Close(_) => break,
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_ => {}
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}
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}
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Err(WebSocketError::ConnectionClosed)
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}
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}
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impl Into<SystemTime> for Timestamp {
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fn into(self) -> SystemTime {
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UNIX_EPOCH
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.checked_add(Duration::new(self.seconds, self.nanos))
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.unwrap()
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}
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}
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impl From<SystemTime> for Timestamp {
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fn from(time: SystemTime) -> Self {
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let duration = time.duration_since(UNIX_EPOCH).unwrap();
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Self {
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seconds: duration.as_secs(),
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nanos: duration.subsec_nanos(),
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::test;
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#[test]
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fn test_round_trip_message() {
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smol::block_on(async {
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let stream = test::Channel::new();
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let message1 = Ping { id: 5 }.into_envelope(3, None, None);
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let message2 = OpenBuffer {
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worktree_id: 0,
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path: "some/path".to_string(),
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}
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.into_envelope(5, None, None);
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let mut message_stream = MessageStream::new(stream);
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message_stream.write_message(&message1).await.unwrap();
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message_stream.write_message(&message2).await.unwrap();
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let decoded_message1 = message_stream.read_message().await.unwrap();
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let decoded_message2 = message_stream.read_message().await.unwrap();
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assert_eq!(decoded_message1, message1);
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assert_eq!(decoded_message2, message2);
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});
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}
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}
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