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<Vec<(LanguageModelRequest, mpsc::UnboundedSender<String>)>>,
96}
97
98impl Default for FakeLanguageModel {
99 fn default() -> Self {
100 Self {
101 provider_id: LanguageModelProviderId::from("fake".to_string()),
102 provider_name: LanguageModelProviderName::from("Fake".to_string()),
103 current_completion_txs: Mutex::new(Vec::new()),
104 }
105 }
106}
107
108impl FakeLanguageModel {
109 pub fn pending_completions(&self) -> Vec<LanguageModelRequest> {
110 self.current_completion_txs
111 .lock()
112 .iter()
113 .map(|(request, _)| request.clone())
114 .collect()
115 }
116
117 pub fn completion_count(&self) -> usize {
118 self.current_completion_txs.lock().len()
119 }
120
121 pub fn stream_completion_response(
122 &self,
123 request: &LanguageModelRequest,
124 chunk: impl Into<String>,
125 ) {
126 let current_completion_txs = self.current_completion_txs.lock();
127 let tx = current_completion_txs
128 .iter()
129 .find(|(req, _)| req == request)
130 .map(|(_, tx)| tx)
131 .unwrap();
132 tx.unbounded_send(chunk.into()).unwrap();
133 }
134
135 pub fn end_completion_stream(&self, request: &LanguageModelRequest) {
136 self.current_completion_txs
137 .lock()
138 .retain(|(req, _)| req != request);
139 }
140
141 pub fn stream_last_completion_response(&self, chunk: impl Into<String>) {
142 self.stream_completion_response(self.pending_completions().last().unwrap(), chunk);
143 }
144
145 pub fn end_last_completion_stream(&self) {
146 self.end_completion_stream(self.pending_completions().last().unwrap());
147 }
148}
149
150impl LanguageModel for FakeLanguageModel {
151 fn id(&self) -> LanguageModelId {
152 LanguageModelId::from("fake".to_string())
153 }
154
155 fn name(&self) -> LanguageModelName {
156 LanguageModelName::from("Fake".to_string())
157 }
158
159 fn provider_id(&self) -> LanguageModelProviderId {
160 self.provider_id.clone()
161 }
162
163 fn provider_name(&self) -> LanguageModelProviderName {
164 self.provider_name.clone()
165 }
166
167 fn supports_tools(&self) -> bool {
168 false
169 }
170
171 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
172 false
173 }
174
175 fn supports_images(&self) -> bool {
176 false
177 }
178
179 fn telemetry_id(&self) -> String {
180 "fake".to_string()
181 }
182
183 fn max_token_count(&self) -> u64 {
184 1000000
185 }
186
187 fn count_tokens(&self, _: LanguageModelRequest, _: &App) -> BoxFuture<'static, Result<u64>> {
188 futures::future::ready(Ok(0)).boxed()
189 }
190
191 fn stream_completion(
192 &self,
193 request: LanguageModelRequest,
194 _: &AsyncApp,
195 ) -> BoxFuture<
196 'static,
197 Result<
198 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
199 LanguageModelCompletionError,
200 >,
201 > {
202 let (tx, rx) = mpsc::unbounded();
203 self.current_completion_txs.lock().push((request, tx));
204 async move {
205 Ok(rx
206 .map(|text| Ok(LanguageModelCompletionEvent::Text(text)))
207 .boxed())
208 }
209 .boxed()
210 }
211
212 fn as_fake(&self) -> &Self {
213 self
214 }
215}