feat: add discord rich presence (#105)

### Explanation

_No response_

### Issue

_No response_

### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

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### Versioning

_No response_

Reviewed-on: #105
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src-tauri/Cargo.lock

@@ -437,7 +437,7 @@ checksum = "d38f2da7a0a2c4ccf0065be06397cc26a81f4e528be095826eee9d4adbb8c60f"
 dependencies = [
  "byteorder",
  "fnv",
- "uuid",
+ "uuid 1.19.0",
 ]
 
 [[package]]
@@ -788,6 +788,19 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "discord-rich-presence"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75db747ecd252c01bfecaf709b07fcb4c634adf0edb5fed47bc9c3052e7076b"
+dependencies = [
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "serde_repr",
+ "uuid 0.8.2",
+]
+
 [[package]]
 name = "dispatch"
 version = "0.2.0"
@@ -1602,9 +1615,10 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "hikari-desktop"
-version = "1.1.1"
+version = "1.2.0"
 dependencies = [
  "chrono",
+ "discord-rich-presence",
  "parking_lot",
  "semver",
  "serde",
@@ -1622,7 +1636,7 @@ dependencies = [
  "tauri-plugin-store",
  "tempfile",
  "tokio",
- "uuid",
+ "uuid 1.19.0",
  "windows 0.62.2",
 ]
 
@@ -3578,7 +3592,7 @@ dependencies = [
  "serde",
  "serde_json",
  "url",
- "uuid",
+ "uuid 1.19.0",
 ]
 
 [[package]]
@@ -4261,7 +4275,7 @@ dependencies = [
  "thiserror 2.0.17",
  "time",
  "url",
- "uuid",
+ "uuid 1.19.0",
  "walkdir",
 ]
 
@@ -4557,7 +4571,7 @@ dependencies = [
  "toml 0.9.11+spec-1.1.0",
  "url",
  "urlpattern",
- "uuid",
+ "uuid 1.19.0",
  "walkdir",
 ]
 
@@ -5099,6 +5113,15 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "uuid"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+dependencies = [
+ "getrandom 0.2.17",
+]
+
 [[package]]
 name = "uuid"
 version = "1.19.0"
@@ -6127,7 +6150,7 @@ dependencies = [
  "serde_repr",
  "tracing",
  "uds_windows",
- "uuid",
+ "uuid 1.19.0",
  "windows-sys 0.61.2",
  "winnow 0.7.14",
  "zbus_macros",

src-tauri/Cargo.toml

@@ -31,6 +31,7 @@ tauri-plugin-fs = "2"
 tempfile = "3"
 semver = "1"
 chrono = { version = "0.4.43", features = ["serde"] }
+discord-rich-presence = "0.2"
 
 [target.'cfg(windows)'.dependencies]
 windows = { version = "0.62", features = [

src-tauri/src/commands.rs

@@ -647,6 +647,42 @@ async fn save_cost_history(app: &AppHandle, history: &crate::cost_tracking::Cost
     Ok(())
 }
 
+#[tauri::command]
+pub async fn init_discord_rpc(
+    discord_rpc: State<'_, std::sync::Arc<crate::discord_rpc::DiscordRpcManager>>,
+    session_name: String,
+    model: String,
+    started_at: i64,
+) -> Result<(), String> {
+    discord_rpc.init(session_name, model, started_at)
+}
+
+#[tauri::command]
+pub async fn update_discord_rpc(
+    discord_rpc: State<'_, std::sync::Arc<crate::discord_rpc::DiscordRpcManager>>,
+    session_name: String,
+    model: String,
+    started_at: i64,
+) -> Result<(), String> {
+    discord_rpc.update(session_name, model, started_at)
+}
+
+#[tauri::command]
+pub async fn stop_discord_rpc(
+    discord_rpc: State<'_, std::sync::Arc<crate::discord_rpc::DiscordRpcManager>>,
+) -> Result<(), String> {
+    discord_rpc.stop()
+}
+
+#[tauri::command]
+pub async fn log_discord_rpc(
+    discord_rpc: State<'_, std::sync::Arc<crate::discord_rpc::DiscordRpcManager>>,
+    message: String,
+) -> Result<(), String> {
+    discord_rpc.log(&message);
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src-tauri/src/config.rs

@@ -112,6 +112,9 @@ pub struct HikariConfig {
 
     #[serde(default = "default_budget_warning_threshold")]
     pub budget_warning_threshold: f32,
+
+    #[serde(default = "default_discord_rpc_enabled")]
+    pub discord_rpc_enabled: bool,
 }
 
 impl Default for HikariConfig {
@@ -144,6 +147,7 @@ impl Default for HikariConfig {
             session_cost_budget: None,
             budget_action: BudgetAction::Warn,
             budget_warning_threshold: 0.8,
+            discord_rpc_enabled: true,
         }
     }
 }
@@ -176,6 +180,10 @@ fn default_budget_warning_threshold() -> f32 {
     0.8
 }
 
+fn default_discord_rpc_enabled() -> bool {
+    true
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default, PartialEq)]
 #[serde(rename_all = "lowercase")]
 pub enum BudgetAction {
@@ -247,6 +255,7 @@ mod tests {
         assert!(config.session_cost_budget.is_none());
         assert_eq!(config.budget_action, BudgetAction::Warn);
         assert!((config.budget_warning_threshold - 0.8).abs() < f32::EPSILON);
+        assert!(config.discord_rpc_enabled);
     }
 
     #[test]
@@ -279,6 +288,7 @@ mod tests {
             session_cost_budget: Some(1.50),
             budget_action: BudgetAction::Block,
             budget_warning_threshold: 0.75,
+            discord_rpc_enabled: true,
         };
 
         let json = serde_json::to_string(&config).unwrap();

src-tauri/src/discord_rpc.rs

@@ -0,0 +1,218 @@
+use discord_rich_presence::activity::{Activity, Assets, Timestamps};
+use discord_rich_presence::{DiscordIpc, DiscordIpcClient};
+use parking_lot::RwLock;
+use std::fs::OpenOptions;
+use std::io::Write;
+use std::path::PathBuf;
+use std::sync::Arc;
+use tauri::{AppHandle, Manager};
+
+pub struct DiscordRpcManager {
+    client: Arc<RwLock<Option<DiscordIpcClient>>>,
+    session_name: Arc<RwLock<String>>,
+    model: Arc<RwLock<String>>,
+    started_at: Arc<RwLock<i64>>,
+    log_path: Arc<RwLock<Option<PathBuf>>>,
+}
+
+impl DiscordRpcManager {
+    pub fn new() -> Self {
+        Self {
+            client: Arc::new(RwLock::new(None)),
+            session_name: Arc::new(RwLock::new(String::new())),
+            model: Arc::new(RwLock::new(String::new())),
+            started_at: Arc::new(RwLock::new(0)),
+            log_path: Arc::new(RwLock::new(None)),
+        }
+    }
+
+    pub fn set_app_handle(&self, app_handle: &AppHandle) {
+        if let Ok(app_data_dir) = app_handle.path().app_data_dir() {
+            // Ensure the directory exists
+            if let Err(e) = std::fs::create_dir_all(&app_data_dir) {
+                eprintln!("Failed to create app data directory: {}", e);
+                return;
+            }
+            let log_path = app_data_dir.join("hikari_discord_rpc.log");
+            *self.log_path.write() = Some(log_path.clone());
+            self.log(&format!(
+                "Log file initialised at: {}",
+                log_path.display()
+            ));
+        }
+    }
+
+    pub fn log(&self, message: &str) {
+        let log_path_guard = self.log_path.read();
+        let path = match log_path_guard.as_ref() {
+            Some(p) => p.clone(),
+            None => PathBuf::from("hikari_discord_rpc.log"),
+        };
+        drop(log_path_guard);
+
+        if let Ok(mut file) = OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&path)
+        {
+            let timestamp = chrono::Local::now().format("%Y-%m-%d %H:%M:%S");
+            let _ = writeln!(file, "[{}] {}", timestamp, message);
+        }
+    }
+
+    pub fn init(&self, initial_session_name: String, initial_model: String, started_at: i64) -> Result<(), String> {
+        self.log("Attempting to initialize Discord RPC...");
+        self.log("DEBUG: Application ID: 1391117878182281316");
+        self.log(&format!("DEBUG: Initial session: '{}', model: '{}', timestamp: {}",
+            initial_session_name, initial_model, started_at));
+
+        let mut client = DiscordIpcClient::new("1391117878182281316")
+            .map_err(|e| {
+                let error_msg = format!("Failed to create Discord RPC client: {} (is Discord running?)", e);
+                self.log(&format!("ERROR: {}", error_msg));
+                error_msg
+            })?;
+
+        self.log("DEBUG: DiscordIpcClient created successfully");
+
+        client
+            .connect()
+            .map_err(|e| {
+                let error_msg = format!("Failed to connect to Discord RPC: {} (ensure Discord is running)", e);
+                self.log(&format!("ERROR: {}", error_msg));
+                error_msg
+            })?;
+
+        self.log("DEBUG: Connected to Discord IPC socket");
+
+        // Set initial activity immediately after connecting
+        self.log("DEBUG: Building initial activity...");
+        let state_text = format!("Model: {}", initial_model);
+        let assets = Assets::new()
+            .large_image("hikari")
+            .large_text("Hikari - Claude Code Assistant");
+
+        self.log("DEBUG: Assets created - large_image: 'hikari', large_text: 'Hikari - Claude Code Assistant'");
+
+        let timestamps = Timestamps::new()
+            .start(started_at);
+
+        self.log(&format!("DEBUG: Timestamps created - start: {}", started_at));
+
+        let activity = Activity::new()
+            .details(initial_session_name.as_str())
+            .state(state_text.as_str())
+            .assets(assets)
+            .timestamps(timestamps);
+
+        self.log(&format!("DEBUG: Activity created - details: '{}', state: '{}'",
+            initial_session_name, state_text));
+
+        self.log("DEBUG: Attempting to set initial activity...");
+        client
+            .set_activity(activity)
+            .map_err(|e| {
+                let error_msg = format!("Failed to set initial Discord RPC activity: {}", e);
+                self.log(&format!("ERROR: {}", error_msg));
+                error_msg
+            })?;
+
+        self.log("DEBUG: Initial activity set successfully!");
+
+        // Store the client and initial state
+        *self.client.write() = Some(client);
+        *self.session_name.write() = initial_session_name.clone();
+        *self.model.write() = initial_model.clone();
+        *self.started_at.write() = started_at;
+
+        self.log(&format!("Discord RPC connected successfully with initial activity: session='{}', model='{}'",
+            initial_session_name, initial_model));
+        Ok(())
+    }
+
+    pub fn update(
+        &self,
+        session_name: String,
+        model: String,
+        started_at: i64,
+    ) -> Result<(), String> {
+        self.log(&format!("DEBUG: update() called with session='{}', model='{}', timestamp={}",
+            session_name, model, started_at));
+
+        *self.session_name.write() = session_name.clone();
+        *self.model.write() = model.clone();
+        *self.started_at.write() = started_at;
+
+        self.log("DEBUG: State variables updated");
+
+        let mut client_guard = self.client.write();
+        let client = client_guard
+            .as_mut()
+            .ok_or_else(|| {
+                let error_msg = "Discord RPC client not initialized".to_string();
+                self.log(&format!("ERROR: {}", error_msg));
+                error_msg
+            })?;
+
+        self.log("DEBUG: Client lock acquired");
+
+        let state_text = format!("Model: {}", model);
+        let assets = Assets::new()
+            .large_image("hikari")
+            .large_text("Hikari - Claude Code Assistant");
+
+        self.log("DEBUG: Assets created - large_image: 'hikari', large_text: 'Hikari - Claude Code Assistant'");
+
+        let timestamps = Timestamps::new()
+            .start(started_at);
+
+        self.log(&format!("DEBUG: Timestamps created - start: {}", started_at));
+
+        let activity = Activity::new()
+            .details(session_name.as_str())
+            .state(state_text.as_str())
+            .assets(assets)
+            .timestamps(timestamps);
+
+        self.log(&format!("DEBUG: Activity created - details: '{}', state: '{}'",
+            session_name, state_text));
+
+        self.log("DEBUG: Attempting to set activity...");
+        client
+            .set_activity(activity)
+            .map_err(|e| {
+                let error_msg = format!("Failed to update Discord RPC: {}", e);
+                self.log(&format!("ERROR: {}", error_msg));
+                error_msg
+            })?;
+
+        self.log(&format!("Updated Discord RPC: session='{}', model='{}'", session_name, model));
+        Ok(())
+    }
+
+    pub fn stop(&self) -> Result<(), String> {
+        self.log("DEBUG: stop() called");
+
+        let mut client_guard = self.client.write();
+        if let Some(mut client) = client_guard.take() {
+            self.log("DEBUG: Client found, attempting to close...");
+            client
+                .close()
+                .map_err(|e| {
+                    let error_msg = format!("Failed to close Discord RPC: {}", e);
+                    self.log(&format!("ERROR: {}", error_msg));
+                    error_msg
+                })?;
+            self.log("Discord RPC stopped successfully");
+        } else {
+            self.log("DEBUG: No client to stop (already stopped or never initialized)");
+        }
+        Ok(())
+    }
+}
+
+impl Default for DiscordRpcManager {
+    fn default() -> Self {
+        Self::new()
+    }
+}

src-tauri/src/lib.rs

@@ -4,6 +4,7 @@ mod clipboard;
 mod commands;
 mod config;
 mod cost_tracking;
+mod discord_rpc;
 mod git;
 mod notifications;
 mod quick_actions;
@@ -23,11 +24,13 @@ use bridge_manager::create_shared_bridge_manager;
 use clipboard::*;
 use commands::load_saved_achievements;
 use commands::*;
+use discord_rpc::DiscordRpcManager;
 use git::*;
 use notifications::*;
 use quick_actions::*;
 use sessions::*;
 use snippets::*;
+use std::sync::Arc;
 use tauri::Manager;
 use temp_manager::create_shared_temp_manager;
 use tray::{setup_tray, should_minimize_to_tray};
@@ -39,6 +42,7 @@ use wsl_notifications::*;
 pub fn run() {
     let bridge_manager = create_shared_bridge_manager();
     let temp_manager = create_shared_temp_manager().expect("Failed to create temp file manager");
+    let discord_rpc = Arc::new(DiscordRpcManager::new());
 
     tauri::Builder::default()
         .plugin(tauri_plugin_dialog::init())
@@ -52,10 +56,14 @@ pub fn run() {
         .plugin(tauri_plugin_fs::init())
         .manage(bridge_manager.clone())
         .manage(temp_manager.clone())
+        .manage(discord_rpc.clone())
         .setup(move |app| {
             // Initialize the app handle in the bridge manager
             bridge_manager.lock().set_app_handle(app.handle().clone());
 
+            // Initialize the app handle in the Discord RPC manager for logging
+            discord_rpc.set_app_handle(app.handle());
+
             // Clean up any orphaned temp files from previous sessions
             if let Ok(count) = temp_manager.lock().cleanup_orphaned_files() {
                 if count > 0 {
@@ -169,6 +177,10 @@ pub fn run() {
             get_today_cost,
             get_week_cost,
             get_month_cost,
+            init_discord_rpc,
+            update_discord_rpc,
+            stop_discord_rpc,
+            log_discord_rpc,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");