Adding some IPC.

Cargo.lock

@@ -1907,6 +1907,8 @@ dependencies = [
  "genai",
  "human-panic",
  "irc",
+ "serde",
+ "serde_json",
  "tokio",
  "tracing",
  "tracing-subscriber",

Cargo.toml

@@ -14,7 +14,9 @@ futures = "0.3"
 human-panic = "2.0"
 genai = "0.4.3"
 irc = "1.1"
-tokio = { version = "1", features = [ "macros", "rt-multi-thread" ] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "1", features = [ "io-util", "macros", "net", "rt-multi-thread", "sync" ] }
 tracing = "0.1"
 tracing-subscriber = "0.3"
 

rustfmt.toml

@@ -3,5 +3,5 @@ style_edition = "2024"
 comment_width = 100
 format_code_in_doc_comments = true
 imports_granularity = "Crate"
-imports_layout = "Vertical"
+imports_layout = "HorizontalVertical"
 wrap_comments = true

src/chat.rs

@@ -1,24 +1,10 @@
-use color_eyre::{
-    Result,
-    eyre::{
-        OptionExt,
-        WrapErr,
-    },
-};
+use color_eyre::{Result, eyre::WrapErr};
 // Lots of namespace confusion potential
 use crate::qna::LLMHandle;
 use config::Config as MainConfig;
 use futures::StreamExt;
-use irc::client::prelude::{
-    Client as IRCClient,
-    Command,
-    Config as IRCConfig,
-};
-use tracing::{
-    Level,
-    event,
-    instrument,
-};
+use irc::client::prelude::{Client as IRCClient, Command, Config as IRCConfig};
+use tracing::{Level, event, instrument};
 
 #[derive(Debug)]
 pub struct Chat {
@@ -73,7 +59,9 @@ impl Chat {
                 // Make it all one line.
                 msg.retain(|c| c != '\n' && c != '\r');
                 msg.truncate(500);
-                client.send_privmsg(&channel, msg).wrap_err("Could not send to {channel}")?;
+                client
+                    .send_privmsg(&channel, msg)
+                    .wrap_err("Could not send to {channel}")?;
             }
         }
 

src/commands.rs

@@ -1,8 +1,5 @@
 use color_eyre::Result;
-use std::path::{
-    Path,
-    PathBuf,
-};
+use std::path::{Path, PathBuf};
 
 #[derive(Clone, Debug)]
 pub struct Root {
@@ -16,7 +13,7 @@ impl Root {
         }
     }
 
-    pub fn run_command(cmd_string: impl AsRef<str>) -> Result<()> {
+    pub fn run_command(_cmd_string: impl AsRef<str>) -> Result<()> {
         todo!();
     }
 }

src/event.rs

@@ -0,0 +1,14 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+pub struct Event {
+    message: String,
+}
+
+impl Event {
+    pub fn new(msg: impl Into<String>) -> Self {
+        Self {
+            message: msg.into(),
+        }
+    }
+}

src/event_manager.rs

@@ -0,0 +1,89 @@
+use std::{collections::VecDeque, path::Path, sync::Arc};
+
+use color_eyre::Result;
+use tokio::{
+    io::AsyncWriteExt,
+    net::{UnixListener, UnixStream},
+    sync::{RwLock, broadcast},
+};
+use tracing::error;
+
+use crate::event::Event;
+
+// Hard coding for now.  Maybe make this a parameter to new.
+const EVENT_BUF_MAX: usize = 1000;
+
+// Manager for communication with plugins.
+pub struct EventManager {
+    announce: broadcast::Sender<String>, // Everything broadcasts here.
+    events: Arc<RwLock<VecDeque<String>>>, // Ring buffer.
+}
+
+impl EventManager {
+    pub fn new() -> Result<Self> {
+        let (announce, _) = broadcast::channel(100);
+
+        Ok(Self {
+            announce,
+            events: Arc::new(RwLock::new(VecDeque::<String>::new())),
+        })
+    }
+
+    pub async fn broadcast(&self, event: &Event) -> Result<()> {
+        let msg = serde_json::to_string(event)? + "\n";
+
+        let mut events = self.events.write().await;
+
+        if events.len() >= EVENT_BUF_MAX {
+            events.pop_front();
+        }
+
+        events.push_back(msg.clone());
+        drop(events);
+
+        let _ = self.announce.send(msg);
+
+        Ok(())
+    }
+
+    pub async fn start_listening(self: Arc<Self>, path: impl AsRef<Path>) {
+        let listener = UnixListener::bind(path).unwrap();
+
+        loop {
+            match listener.accept().await {
+                Ok((stream, _)) => {
+                    // Spawn a new stream for the plugin.  The loop
+                    // runs recursively from there.
+                    let broadcaster = Arc::clone(&self);
+                    tokio::spawn(async move {
+                        // send events.
+                        let _ = broadcaster.send_events(stream).await;
+                    });
+                }
+                Err(e) => error!("Accept error: {e}"),
+            }
+        }
+    }
+
+    async fn send_events(&self, stream: UnixStream) -> Result<()> {
+        let mut writer = stream;
+
+        // Take care of history.
+        let events = self.events.read().await;
+        for event in events.iter() {
+            writer.write_all(event.as_bytes()).await?;
+        }
+        drop(events);
+
+        // Now just broadcast the new events.
+        let mut rx = self.announce.subscribe();
+        while let Ok(event) = rx.recv().await {
+            if writer.write_all(event.as_bytes()).await.is_err() {
+                // *click*
+                break;
+            }
+        }
+
+        Ok(())
+    }
+}

src/ipc.rs

@@ -0,0 +1,26 @@
+// Provides an IPC socket to communicate with other processes.
+
+use std::path::Path;
+
+use color_eyre::Result;
+use tokio::net::UnixListener;
+
+pub struct IPC {
+    listener: UnixListener,
+}
+
+impl IPC {
+    pub fn new(path: impl AsRef<Path>) -> Result<Self> {
+        let listener = UnixListener::bind(path)?;
+        Ok(Self { listener })
+    }
+
+    pub async fn run(&self) -> Result<()> {
+        loop {
+            match self.listener.accept().await {
+                Ok((_stream, _addr)) => {}
+                Err(e) => return Err(e.into()),
+            }
+        }
+    }
+}

src/main.rs

@@ -1,17 +1,14 @@
-use color_eyre::{
-    Result,
-    eyre::WrapErr,
-};
+use color_eyre::{Result, eyre::WrapErr};
 use human_panic::setup_panic;
-use std::os::unix::fs;
-use tracing::{
-    Level,
-    info,
-};
+use std::{os::unix::fs, sync::Arc};
+use tracing::{Level, info};
 use tracing_subscriber::FmtSubscriber;
 
+use crate::event_manager::EventManager;
+
 mod chat;
-mod commands;
+mod event;
+mod event_manager;
 mod qna;
 mod setup;
 
@@ -47,18 +44,17 @@ async fn main() -> Result<()> {
     }
 
     // Setup root path for commands.
-    let cmd_root = if let Ok(command_path) = config.get_string("command-path") {
-        Some(commands::Root::new(command_path))
-    } else {
-        None
-    };
+    // let cmd_root = if let Ok(command_path) = config.get_string("command-path") {
+    //     Some(commands::Root::new(command_path))
+    // } else {
+    //     None
+    // };
 
     let handle = qna::LLMHandle::new(
         config.get_string("api-key").wrap_err("API missing.")?,
         config
             .get_string("base-url")
             .wrap_err("base-url missing.")?,
-        cmd_root,
         config
             .get_string("model")
             .wrap_err("model string missing.")?,
@@ -67,9 +63,23 @@ async fn main() -> Result<()> {
             .unwrap_or_else(|_| DEFAULT_INSTRUCT.to_string()),
     )
     .wrap_err("Couldn't initialize LLM handle.")?;
+
+    let ev_manager = Arc::new(EventManager::new()?);
+    let ev_manager_clone = Arc::clone(&ev_manager);
+    ev_manager_clone
+        .broadcast(&event::Event::new("Starting..."))
+        .await?;
+
     let mut c = chat::new(&config, &handle).await?;
 
-    c.run().await.unwrap();
+    tokio::select! {
+        _ = ev_manager_clone.start_listening("/tmp/robo.sock") => {
+            // Event listener ended
+        }
+        result = c.run() => {
+            result.unwrap();
+        }
+    }
 
     Ok(())
 }

src/qna.rs

@@ -1,19 +1,10 @@
-use crate::commands;
 use color_eyre::Result;
 use futures::StreamExt;
 use genai::{
     Client,
     ModelIden,
-    chat::{
-        ChatMessage,
-        ChatRequest,
-        ChatStreamEvent,
-        StreamChunk,
-    },
-    resolver::{
-        AuthData,
-        AuthResolver,
-    },
+    chat::{ChatMessage, ChatRequest, ChatStreamEvent, StreamChunk},
+    resolver::{AuthData, AuthResolver},
 };
 use tracing::info;
 
@@ -23,7 +14,6 @@ use tracing::info;
 pub struct LLMHandle {
     chat_request: ChatRequest,
     client: Client,
-    cmd_root: Option<commands::Root>,
     model: String,
 }
 
@@ -31,7 +21,6 @@ impl LLMHandle {
     pub fn new(
         api_key: String,
         _base_url: impl AsRef<str>,
-        cmd_root: Option<commands::Root>,
         model: impl Into<String>,
         system_role: String,
     ) -> Result<LLMHandle> {
@@ -51,7 +40,6 @@ impl LLMHandle {
         Ok(LLMHandle {
             client,
             chat_request,
-            cmd_root,
             model: model.into(),
         })
     }

src/setup.rs

@@ -1,15 +1,9 @@
 use clap::Parser;
-use color_eyre::{
-    Result,
-    eyre::WrapErr,
-};
+use color_eyre::{Result, eyre::WrapErr};
 use config::Config;
 use directories::ProjectDirs;
 use std::path::PathBuf;
-use tracing::{
-    info,
-    instrument,
-};
+use tracing::{info, instrument};
 
 // TODO: use [clap(long, short, help_heading = Some(section))]
 #[derive(Clone, Debug, Parser)]