1use std::future;
2use std::sync::Arc;
3
4use anyhow::{anyhow, Result};
5use copilot::copilot_chat::{
6 ChatMessage, CopilotChat, Model as CopilotChatModel, Request as CopilotChatRequest,
7 Role as CopilotChatRole,
8};
9use copilot::{Copilot, Status};
10use futures::future::BoxFuture;
11use futures::stream::BoxStream;
12use futures::{FutureExt, StreamExt};
13use gpui::{
14 percentage, svg, Animation, AnimationExt, AnyView, App, AsyncApp, Entity, Render, Subscription,
15 Task, Transformation,
16};
17use language_model::{
18 AuthenticateError, LanguageModel, LanguageModelCompletionEvent, LanguageModelId,
19 LanguageModelName, LanguageModelProvider, LanguageModelProviderId, LanguageModelProviderName,
20 LanguageModelProviderState, LanguageModelRequest, RateLimiter, Role,
21};
22use settings::SettingsStore;
23use std::time::Duration;
24use strum::IntoEnumIterator;
25use ui::prelude::*;
26
27use super::anthropic::count_anthropic_tokens;
28use super::google::count_google_tokens;
29use super::open_ai::count_open_ai_tokens;
30
31const PROVIDER_ID: &str = "copilot_chat";
32const PROVIDER_NAME: &str = "GitHub Copilot Chat";
33
34#[derive(Default, Clone, Debug, PartialEq)]
35pub struct CopilotChatSettings {}
36
37pub struct CopilotChatLanguageModelProvider {
38 state: Entity<State>,
39}
40
41pub struct State {
42 _copilot_chat_subscription: Option<Subscription>,
43 _settings_subscription: Subscription,
44}
45
46impl State {
47 fn is_authenticated(&self, cx: &App) -> bool {
48 CopilotChat::global(cx)
49 .map(|m| m.read(cx).is_authenticated())
50 .unwrap_or(false)
51 }
52}
53
54impl CopilotChatLanguageModelProvider {
55 pub fn new(cx: &mut App) -> Self {
56 let state = cx.new(|cx| {
57 let _copilot_chat_subscription = CopilotChat::global(cx)
58 .map(|copilot_chat| cx.observe(&copilot_chat, |_, _, cx| cx.notify()));
59 State {
60 _copilot_chat_subscription,
61 _settings_subscription: cx.observe_global::<SettingsStore>(|_, cx| {
62 cx.notify();
63 }),
64 }
65 });
66
67 Self { state }
68 }
69}
70
71impl LanguageModelProviderState for CopilotChatLanguageModelProvider {
72 type ObservableEntity = State;
73
74 fn observable_entity(&self) -> Option<gpui::Entity<Self::ObservableEntity>> {
75 Some(self.state.clone())
76 }
77}
78
79impl LanguageModelProvider for CopilotChatLanguageModelProvider {
80 fn id(&self) -> LanguageModelProviderId {
81 LanguageModelProviderId(PROVIDER_ID.into())
82 }
83
84 fn name(&self) -> LanguageModelProviderName {
85 LanguageModelProviderName(PROVIDER_NAME.into())
86 }
87
88 fn icon(&self) -> IconName {
89 IconName::Copilot
90 }
91
92 fn provided_models(&self, _cx: &App) -> Vec<Arc<dyn LanguageModel>> {
93 CopilotChatModel::iter()
94 .map(|model| {
95 Arc::new(CopilotChatLanguageModel {
96 model,
97 request_limiter: RateLimiter::new(4),
98 }) as Arc<dyn LanguageModel>
99 })
100 .collect()
101 }
102
103 fn is_authenticated(&self, cx: &App) -> bool {
104 self.state.read(cx).is_authenticated(cx)
105 }
106
107 fn authenticate(&self, cx: &mut App) -> Task<Result<(), AuthenticateError>> {
108 if self.is_authenticated(cx) {
109 return Task::ready(Ok(()));
110 };
111
112 let Some(copilot) = Copilot::global(cx) else {
113 return Task::ready( Err(anyhow!(
114 "Copilot must be enabled for Copilot Chat to work. Please enable Copilot and try again."
115 ).into()));
116 };
117
118 let err = match copilot.read(cx).status() {
119 Status::Authorized => return Task::ready(Ok(())),
120 Status::Disabled => anyhow!("Copilot must be enabled for Copilot Chat to work. Please enable Copilot and try again."),
121 Status::Error(err) => anyhow!(format!("Received the following error while signing into Copilot: {err}")),
122 Status::Starting { task: _ } => anyhow!("Copilot is still starting, please wait for Copilot to start then try again"),
123 Status::Unauthorized => anyhow!("Unable to authorize with Copilot. Please make sure that you have an active Copilot and Copilot Chat subscription."),
124 Status::SignedOut => anyhow!("You have signed out of Copilot. Please sign in to Copilot and try again."),
125 Status::SigningIn { prompt: _ } => anyhow!("Still signing into Copilot..."),
126 };
127
128 Task::ready(Err(err.into()))
129 }
130
131 fn configuration_view(&self, _: &mut Window, cx: &mut App) -> AnyView {
132 let state = self.state.clone();
133 cx.new(|cx| ConfigurationView::new(state, cx)).into()
134 }
135
136 fn reset_credentials(&self, _cx: &mut App) -> Task<Result<()>> {
137 Task::ready(Err(anyhow!(
138 "Signing out of GitHub Copilot Chat is currently not supported."
139 )))
140 }
141}
142
143pub struct CopilotChatLanguageModel {
144 model: CopilotChatModel,
145 request_limiter: RateLimiter,
146}
147
148impl LanguageModel for CopilotChatLanguageModel {
149 fn id(&self) -> LanguageModelId {
150 LanguageModelId::from(self.model.id().to_string())
151 }
152
153 fn name(&self) -> LanguageModelName {
154 LanguageModelName::from(self.model.display_name().to_string())
155 }
156
157 fn provider_id(&self) -> LanguageModelProviderId {
158 LanguageModelProviderId(PROVIDER_ID.into())
159 }
160
161 fn provider_name(&self) -> LanguageModelProviderName {
162 LanguageModelProviderName(PROVIDER_NAME.into())
163 }
164
165 fn telemetry_id(&self) -> String {
166 format!("copilot_chat/{}", self.model.id())
167 }
168
169 fn max_token_count(&self) -> usize {
170 self.model.max_token_count()
171 }
172
173 fn count_tokens(
174 &self,
175 request: LanguageModelRequest,
176 cx: &App,
177 ) -> BoxFuture<'static, Result<usize>> {
178 match self.model {
179 CopilotChatModel::Claude3_5Sonnet => count_anthropic_tokens(request, cx),
180 CopilotChatModel::Claude3_7Sonnet => count_anthropic_tokens(request, cx),
181 CopilotChatModel::Gemini20Flash => count_google_tokens(request, cx),
182 _ => {
183 let model = match self.model {
184 CopilotChatModel::Gpt4o => open_ai::Model::FourOmni,
185 CopilotChatModel::Gpt4 => open_ai::Model::Four,
186 CopilotChatModel::Gpt3_5Turbo => open_ai::Model::ThreePointFiveTurbo,
187 CopilotChatModel::O1 | CopilotChatModel::O3Mini => open_ai::Model::Four,
188 CopilotChatModel::Claude3_5Sonnet
189 | CopilotChatModel::Claude3_7Sonnet
190 | CopilotChatModel::Gemini20Flash => {
191 unreachable!()
192 }
193 };
194 count_open_ai_tokens(request, model, cx)
195 }
196 }
197 }
198
199 fn stream_completion(
200 &self,
201 request: LanguageModelRequest,
202 cx: &AsyncApp,
203 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<LanguageModelCompletionEvent>>>> {
204 if let Some(message) = request.messages.last() {
205 if message.contents_empty() {
206 const EMPTY_PROMPT_MSG: &str =
207 "Empty prompts aren't allowed. Please provide a non-empty prompt.";
208 return futures::future::ready(Err(anyhow::anyhow!(EMPTY_PROMPT_MSG))).boxed();
209 }
210
211 // Copilot Chat has a restriction that the final message must be from the user.
212 // While their API does return an error message for this, we can catch it earlier
213 // and provide a more helpful error message.
214 if !matches!(message.role, Role::User) {
215 const USER_ROLE_MSG: &str = "The final message must be from the user. To provide a system prompt, you must provide the system prompt followed by a user prompt.";
216 return futures::future::ready(Err(anyhow::anyhow!(USER_ROLE_MSG))).boxed();
217 }
218 }
219
220 let copilot_request = self.to_copilot_chat_request(request);
221 let is_streaming = copilot_request.stream;
222
223 let request_limiter = self.request_limiter.clone();
224 let future = cx.spawn(|cx| async move {
225 let response = CopilotChat::stream_completion(copilot_request, cx);
226 request_limiter.stream(async move {
227 let response = response.await?;
228 let stream = response
229 .filter_map(move |response| async move {
230 match response {
231 Ok(result) => {
232 let choice = result.choices.first();
233 match choice {
234 Some(choice) if !is_streaming => {
235 match &choice.message {
236 Some(msg) => Some(Ok(msg.content.clone().unwrap_or_default())),
237 None => Some(Err(anyhow::anyhow!(
238 "The Copilot Chat API returned a response with no message content"
239 ))),
240 }
241 },
242 Some(choice) => {
243 match &choice.delta {
244 Some(delta) => Some(Ok(delta.content.clone().unwrap_or_default())),
245 None => Some(Err(anyhow::anyhow!(
246 "The Copilot Chat API returned a response with no delta content"
247 ))),
248 }
249 },
250 None => Some(Err(anyhow::anyhow!(
251 "The Copilot Chat API returned a response with no choices, but hadn't finished the message yet. Please try again."
252 ))),
253 }
254 }
255 Err(err) => Some(Err(err)),
256 }
257 })
258 .boxed();
259 Ok(stream)
260 }).await
261 });
262
263 async move {
264 Ok(future
265 .await?
266 .map(|result| result.map(LanguageModelCompletionEvent::Text))
267 .boxed())
268 }
269 .boxed()
270 }
271
272 fn use_any_tool(
273 &self,
274 _request: LanguageModelRequest,
275 _name: String,
276 _description: String,
277 _schema: serde_json::Value,
278 _cx: &AsyncApp,
279 ) -> BoxFuture<'static, Result<BoxStream<'static, Result<String>>>> {
280 future::ready(Err(anyhow!("not implemented"))).boxed()
281 }
282}
283
284impl CopilotChatLanguageModel {
285 pub fn to_copilot_chat_request(&self, request: LanguageModelRequest) -> CopilotChatRequest {
286 CopilotChatRequest::new(
287 self.model.clone(),
288 request
289 .messages
290 .into_iter()
291 .map(|msg| ChatMessage {
292 role: match msg.role {
293 Role::User => CopilotChatRole::User,
294 Role::Assistant => CopilotChatRole::Assistant,
295 Role::System => CopilotChatRole::System,
296 },
297 content: msg.string_contents(),
298 })
299 .collect(),
300 )
301 }
302}
303
304struct ConfigurationView {
305 copilot_status: Option<copilot::Status>,
306 state: Entity<State>,
307 _subscription: Option<Subscription>,
308}
309
310impl ConfigurationView {
311 pub fn new(state: Entity<State>, cx: &mut Context<Self>) -> Self {
312 let copilot = Copilot::global(cx);
313
314 Self {
315 copilot_status: copilot.as_ref().map(|copilot| copilot.read(cx).status()),
316 state,
317 _subscription: copilot.as_ref().map(|copilot| {
318 cx.observe(copilot, |this, model, cx| {
319 this.copilot_status = Some(model.read(cx).status());
320 cx.notify();
321 })
322 }),
323 }
324 }
325}
326
327impl Render for ConfigurationView {
328 fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
329 if self.state.read(cx).is_authenticated(cx) {
330 const LABEL: &str = "Authorized.";
331 h_flex()
332 .gap_1()
333 .child(Icon::new(IconName::Check).color(Color::Success))
334 .child(Label::new(LABEL))
335 } else {
336 let loading_icon = svg()
337 .size_8()
338 .path(IconName::ArrowCircle.path())
339 .text_color(window.text_style().color)
340 .with_animation(
341 "icon_circle_arrow",
342 Animation::new(Duration::from_secs(2)).repeat(),
343 |svg, delta| svg.with_transformation(Transformation::rotate(percentage(delta))),
344 );
345
346 const ERROR_LABEL: &str = "Copilot Chat requires an active GitHub Copilot subscription. Please ensure Copilot is configured and try again, or use a different Assistant provider.";
347
348 match &self.copilot_status {
349 Some(status) => match status {
350 Status::Disabled => v_flex().gap_6().p_4().child(Label::new(ERROR_LABEL)),
351 Status::Starting { task: _ } => {
352 const LABEL: &str = "Starting Copilot...";
353 v_flex()
354 .gap_6()
355 .justify_center()
356 .items_center()
357 .child(Label::new(LABEL))
358 .child(loading_icon)
359 }
360 Status::SigningIn { prompt: _ } => {
361 const LABEL: &str = "Signing in to Copilot...";
362 v_flex()
363 .gap_6()
364 .justify_center()
365 .items_center()
366 .child(Label::new(LABEL))
367 .child(loading_icon)
368 }
369 Status::Error(_) => {
370 const LABEL: &str = "Copilot had issues starting. Please try restarting it. If the issue persists, try reinstalling Copilot.";
371 v_flex()
372 .gap_6()
373 .child(Label::new(LABEL))
374 .child(svg().size_8().path(IconName::CopilotError.path()))
375 }
376 _ => {
377 const LABEL: &str =
378 "To use Zed's assistant with GitHub Copilot, you need to be logged in to GitHub. Note that your GitHub account must have an active Copilot Chat subscription.";
379 v_flex().gap_6().child(Label::new(LABEL)).child(
380 v_flex()
381 .gap_2()
382 .child(
383 Button::new("sign_in", "Sign In")
384 .icon_color(Color::Muted)
385 .icon(IconName::Github)
386 .icon_position(IconPosition::Start)
387 .icon_size(IconSize::Medium)
388 .style(ui::ButtonStyle::Filled)
389 .full_width()
390 .on_click(|_, window, cx| {
391 copilot::initiate_sign_in(window, cx)
392 }),
393 )
394 .child(
395 div().flex().w_full().items_center().child(
396 Label::new("Sign in to start using Github Copilot Chat.")
397 .color(Color::Muted)
398 .size(ui::LabelSize::Small),
399 ),
400 ),
401 )
402 }
403 },
404 None => v_flex().gap_6().child(Label::new(ERROR_LABEL)),
405 }
406 }
407 }
408}