| 1 | //! The commands a webview invokes. |
| 2 | |
| 3 | use std::sync::Arc; |
| 4 | |
| 5 | use ed_agent::{AgentReply, ApprovalDecision, ChatMessage, ChatReply, Ed, EngineInfo, SessionMeta}; |
| 6 | use tauri::State; |
| 7 | |
| 8 | use crate::sessions::EdSessions; |
| 9 | use crate::sink::TauriSink; |
| 10 | |
| 11 | /// Managed state holding the agent. |
| 12 | /// |
| 13 | /// Register one during `setup` with `app.manage(EdState::new(ed))`. Ed is |
| 14 | /// deliberately not a global here: an application that switches accounts, or |
| 15 | /// runs more than one window against separate engines, needs to control the |
| 16 | /// lifetime, and a `static` takes that away. |
| 17 | pub struct EdState { |
| 18 | ed: Arc<Ed<TauriSink>>, |
| 19 | } |
| 20 | |
| 21 | impl EdState { |
| 22 | pub fn new(ed: Ed<TauriSink>) -> Self { |
| 23 | Self { ed: Arc::new(ed) } |
| 24 | } |
| 25 | |
| 26 | /// The agent, for commands the host defines itself — loading a model, |
| 27 | /// setting a system prompt, anything Ed exposes but this crate doesn't |
| 28 | /// wrap. |
| 29 | pub fn ed(&self) -> &Ed<TauriSink> { |
| 30 | &self.ed |
| 31 | } |
| 32 | |
| 33 | /// A shared handle to the agent, for work moved onto a spawned task. |
| 34 | pub fn shared(&self) -> Arc<Ed<TauriSink>> { |
| 35 | self.ed.clone() |
| 36 | } |
| 37 | |
| 38 | /// Run an agent turn on a spawned task and deliver the result as a |
| 39 | /// `chat_reply` event `{id, session, reply, duration, error}`, with |
| 40 | /// `session` empty. Returns immediately. |
| 41 | /// |
| 42 | /// For single-conversation apps. A long-pending invoke can be dropped by a |
| 43 | /// mobile webview, so the answer travels by event. Text deltas arrive as |
| 44 | /// `chat_text_delta` while it runs. |
| 45 | pub fn submit(&self, app: tauri::AppHandle, id: String, message: String) { |
| 46 | use tauri::Emitter; |
| 47 | let ed = self.ed.clone(); |
| 48 | tokio::spawn(async move { |
| 49 | let payload = match ed.run(message).await { |
| 50 | Ok(reply) => crate::SubmitReplyPayload { |
| 51 | id, |
| 52 | session: String::new(), |
| 53 | reply: Some(reply.text), |
| 54 | duration: Some(reply.duration), |
| 55 | error: None, |
| 56 | }, |
| 57 | Err(err) => crate::SubmitReplyPayload { |
| 58 | id, |
| 59 | session: String::new(), |
| 60 | reply: None, |
| 61 | duration: None, |
| 62 | error: Some(err.to_string()), |
| 63 | }, |
| 64 | }; |
| 65 | if let Err(err) = app.emit(crate::EVENT_CHAT_REPLY, payload) { |
| 66 | log::warn!("ed-tauri: could not emit chat_reply: {err}"); |
| 67 | } |
| 68 | }); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /// Current status, loaded model, footprint, and history length. |
| 73 | #[tauri::command] |
| 74 | pub async fn chat_get_status(state: State<'_, EdState>) -> Result<EngineInfo, String> { |
| 75 | Ok(state.ed.info().await) |
| 76 | } |
| 77 | |
| 78 | /// The conversation so far. |
| 79 | #[tauri::command] |
| 80 | pub async fn chat_get_history(state: State<'_, EdState>) -> Result<Vec<ChatMessage>, String> { |
| 81 | Ok(state.ed.history().await) |
| 82 | } |
| 83 | |
| 84 | /// Clear the conversation, returning how many messages were dropped. The model |
| 85 | /// stays loaded. |
| 86 | #[tauri::command] |
| 87 | pub async fn chat_clear_history(state: State<'_, EdState>) -> Result<usize, String> { |
| 88 | Ok(state.ed.clear_history().await) |
| 89 | } |
| 90 | |
| 91 | /// Run one inference turn. |
| 92 | /// |
| 93 | /// The reply is also emitted as [`EVENT_CHAT_REPLY`](crate::EVENT_CHAT_REPLY). |
| 94 | /// Prefer listening for that over awaiting this call: on a slow model the |
| 95 | /// webview can garbage-collect the invoke callback before generation |
| 96 | /// finishes, and the answer is lost even though inference succeeded. |
| 97 | #[tauri::command] |
| 98 | pub async fn chat_send_message( |
| 99 | state: State<'_, EdState>, |
| 100 | message: String, |
| 101 | ) -> Result<ChatReply, String> { |
| 102 | Ok(state.ed.send(message).await) |
| 103 | } |
| 104 | |
| 105 | /// Run a full agent turn, including any tools the host registered. |
| 106 | /// |
| 107 | /// Reports progress as it goes: `chat_tool_requested`, |
| 108 | /// `chat_approval_requested`, `chat_tool_started`, `chat_tool_finished`, and |
| 109 | /// finally `chat_agent_reply`. As with [`chat_send_message`], prefer the event |
| 110 | /// over awaiting this call, since an agent turn is slower still. |
| 111 | /// |
| 112 | /// Unlike [`chat_send_message`] this returns an `Err` on failure rather than |
| 113 | /// folding it into the payload: an agent turn has failure modes a chat reply |
| 114 | /// doesn't (a model that can't call tools, a cancelled turn, a spent round |
| 115 | /// budget), and flattening them all into an error string would throw away the |
| 116 | /// distinction the frontend needs to respond to. |
| 117 | #[tauri::command] |
| 118 | pub async fn chat_run(state: State<'_, EdState>, message: String) -> Result<AgentReply, String> { |
| 119 | state |
| 120 | .ed |
| 121 | .run(message) |
| 122 | .await |
| 123 | .map_err(|error| error.to_string()) |
| 124 | } |
| 125 | |
| 126 | /// Cancel the agent turn in progress, if there is one. |
| 127 | #[tauri::command] |
| 128 | pub async fn chat_cancel(state: State<'_, EdState>) -> Result<(), String> { |
| 129 | state.ed.cancel(); |
| 130 | Ok(()) |
| 131 | } |
| 132 | |
| 133 | /// Stored sessions, most recently updated first. |
| 134 | #[tauri::command] |
| 135 | pub async fn chat_list_sessions(state: State<'_, EdSessions>) -> Result<Vec<SessionMeta>, String> { |
| 136 | state.list().await.map_err(|e| e.to_string()) |
| 137 | } |
| 138 | |
| 139 | /// Start an empty session and make it live. Returns its id. |
| 140 | #[tauri::command] |
| 141 | pub async fn chat_new_session(state: State<'_, EdSessions>) -> Result<String, String> { |
| 142 | Ok(state.new_session().await) |
| 143 | } |
| 144 | |
| 145 | /// Make `session` live and return its messages. |
| 146 | #[tauri::command] |
| 147 | pub async fn chat_switch_session( |
| 148 | state: State<'_, EdSessions>, |
| 149 | session: String, |
| 150 | ) -> Result<Vec<ChatMessage>, String> { |
| 151 | Ok(state.history(&session).await) |
| 152 | } |
| 153 | |
| 154 | #[tauri::command] |
| 155 | pub async fn chat_delete_session( |
| 156 | state: State<'_, EdSessions>, |
| 157 | session: String, |
| 158 | ) -> Result<(), String> { |
| 159 | state.delete(&session).await.map_err(|e| e.to_string()) |
| 160 | } |
| 161 | |
| 162 | /// The messages of `session`, without switching to it. |
| 163 | #[tauri::command] |
| 164 | pub async fn chat_get_session_history( |
| 165 | state: State<'_, EdSessions>, |
| 166 | session: String, |
| 167 | ) -> Result<Vec<ChatMessage>, String> { |
| 168 | Ok(state.peek(&session).await) |
| 169 | } |
| 170 | |
| 171 | /// Run a turn in `session`. Returns at once; the result is a `chat_reply` |
| 172 | /// event carrying `id`. |
| 173 | #[tauri::command] |
| 174 | pub async fn chat_submit( |
| 175 | state: State<'_, EdSessions>, |
| 176 | session: String, |
| 177 | id: String, |
| 178 | message: String, |
| 179 | ) -> Result<(), String> { |
| 180 | state.submit(&session, &id, message).await; |
| 181 | Ok(()) |
| 182 | } |
| 183 | |
| 184 | /// Answer a `chat_approval_requested` event. |
| 185 | #[tauri::command] |
| 186 | pub async fn chat_respond_approval( |
| 187 | state: State<'_, EdSessions>, |
| 188 | request_id: String, |
| 189 | decision: ApprovalDecision, |
| 190 | ) -> Result<(), String> { |
| 191 | state.respond_approval(&request_id, decision).await |
| 192 | } |