1use crate::{
2 AuthenticateError, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
3 LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
4 LanguageModelProviderName, LanguageModelProviderState, LanguageModelRequest,
5 LanguageModelToolChoice,
6};
7use futures::{FutureExt, StreamExt, channel::mpsc, future::BoxFuture, stream::BoxStream};
8use gpui::{AnyView, App, AsyncApp, Entity, Task, Window};
9use http_client::Result;
10use parking_lot::Mutex;
11use std::sync::Arc;
12
13#[derive(Clone)]
14pub struct FakeLanguageModelProvider {
15 id: LanguageModelProviderId,
16 name: LanguageModelProviderName,
17}
18
19impl Default for FakeLanguageModelProvider {
20 fn default() -> Self {
21 Self {
22 id: LanguageModelProviderId::from("fake".to_string()),
23 name: LanguageModelProviderName::from("Fake".to_string()),
24 }
25 }
26}
27
28impl LanguageModelProviderState for FakeLanguageModelProvider {
29 type ObservableEntity = ();
30
31 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
32 None
33 }
34}
35
36impl LanguageModelProvider for FakeLanguageModelProvider {
37 fn id(&self) -> LanguageModelProviderId {
38 self.id.clone()
39 }
40
41 fn name(&self) -> LanguageModelProviderName {
42 self.name.clone()
43 }
44
45 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
46 Some(Arc::new(FakeLanguageModel::default()))
47 }
48
49 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
50 Some(Arc::new(FakeLanguageModel::default()))
51 }
52
53 fn provided_models(&self, _: &App) -> Vec<Arc<dyn LanguageModel>> {
54 vec![Arc::new(FakeLanguageModel::default())]
55 }
56
57 fn is_authenticated(&self, _: &App) -> bool {
58 true
59 }
60
61 fn authenticate(&self, _: &mut App) -> Task<Result<(), AuthenticateError>> {
62 Task::ready(Ok(()))
63 }
64
65 fn configuration_view(&self, _window: &mut Window, _: &mut App) -> AnyView {
66 unimplemented!()
67 }
68
69 fn reset_credentials(&self, _: &mut App) -> Task<Result<()>> {
70 Task::ready(Ok(()))
71 }
72}
73
74impl FakeLanguageModelProvider {
75 pub fn new(id: LanguageModelProviderId, name: LanguageModelProviderName) -> Self {
76 Self { id, name }
77 }
78
79 pub fn test_model(&self) -> FakeLanguageModel {
80 FakeLanguageModel::default()
81 }
82}
83
84#[derive(Debug, PartialEq)]
85pub struct ToolUseRequest {
86 pub request: LanguageModelRequest,
87 pub name: String,
88 pub description: String,
89 pub schema: serde_json::Value,
90}
91
92pub struct FakeLanguageModel {
93 provider_id: LanguageModelProviderId,
94 provider_name: LanguageModelProviderName,
95 current_completion_txs: Mutex<
96 Vec<(
97 LanguageModelRequest,
98 mpsc::UnboundedSender<LanguageModelCompletionEvent>,
99 )>,
100 >,
101}
102
103impl Default for FakeLanguageModel {
104 fn default() -> Self {
105 Self {
106 provider_id: LanguageModelProviderId::from("fake".to_string()),
107 provider_name: LanguageModelProviderName::from("Fake".to_string()),
108 current_completion_txs: Mutex::new(Vec::new()),
109 }
110 }
111}
112
113impl FakeLanguageModel {
114 pub fn pending_completions(&self) -> Vec<LanguageModelRequest> {
115 self.current_completion_txs
116 .lock()
117 .iter()
118 .map(|(request, _)| request.clone())
119 .collect()
120 }
121
122 pub fn completion_count(&self) -> usize {
123 self.current_completion_txs.lock().len()
124 }
125
126 pub fn send_completion_stream_text_chunk(
127 &self,
128 request: &LanguageModelRequest,
129 chunk: impl Into<String>,
130 ) {
131 self.send_completion_stream_event(
132 request,
133 LanguageModelCompletionEvent::Text(chunk.into()),
134 );
135 }
136
137 pub fn send_completion_stream_event(
138 &self,
139 request: &LanguageModelRequest,
140 event: impl Into<LanguageModelCompletionEvent>,
141 ) {
142 let current_completion_txs = self.current_completion_txs.lock();
143 let tx = current_completion_txs
144 .iter()
145 .find(|(req, _)| req == request)
146 .map(|(_, tx)| tx)
147 .unwrap();
148 tx.unbounded_send(event.into()).unwrap();
149 }
150
151 pub fn end_completion_stream(&self, request: &LanguageModelRequest) {
152 self.current_completion_txs
153 .lock()
154 .retain(|(req, _)| req != request);
155 }
156
157 pub fn send_last_completion_stream_text_chunk(&self, chunk: impl Into<String>) {
158 self.send_completion_stream_text_chunk(self.pending_completions().last().unwrap(), chunk);
159 }
160
161 pub fn send_last_completion_stream_event(
162 &self,
163 event: impl Into<LanguageModelCompletionEvent>,
164 ) {
165 self.send_completion_stream_event(self.pending_completions().last().unwrap(), event);
166 }
167
168 pub fn end_last_completion_stream(&self) {
169 self.end_completion_stream(self.pending_completions().last().unwrap());
170 }
171}
172
173impl LanguageModel for FakeLanguageModel {
174 fn id(&self) -> LanguageModelId {
175 LanguageModelId::from("fake".to_string())
176 }
177
178 fn name(&self) -> LanguageModelName {
179 LanguageModelName::from("Fake".to_string())
180 }
181
182 fn provider_id(&self) -> LanguageModelProviderId {
183 self.provider_id.clone()
184 }
185
186 fn provider_name(&self) -> LanguageModelProviderName {
187 self.provider_name.clone()
188 }
189
190 fn supports_tools(&self) -> bool {
191 false
192 }
193
194 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
195 false
196 }
197
198 fn supports_images(&self) -> bool {
199 false
200 }
201
202 fn telemetry_id(&self) -> String {
203 "fake".to_string()
204 }
205
206 fn max_token_count(&self) -> u64 {
207 1000000
208 }
209
210 fn count_tokens(&self, _: LanguageModelRequest, _: &App) -> BoxFuture<'static, Result<u64>> {
211 futures::future::ready(Ok(0)).boxed()
212 }
213
214 fn stream_completion(
215 &self,
216 request: LanguageModelRequest,
217 _: &AsyncApp,
218 ) -> BoxFuture<
219 'static,
220 Result<
221 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
222 LanguageModelCompletionError,
223 >,
224 > {
225 let (tx, rx) = mpsc::unbounded();
226 self.current_completion_txs.lock().push((request, tx));
227 async move { Ok(rx.map(Ok).boxed()) }.boxed()
228 }
229
230 fn as_fake(&self) -> &Self {
231 self
232 }
233}