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
13pub fn language_model_id() -> LanguageModelId {
14 LanguageModelId::from("fake".to_string())
15}
16
17pub fn language_model_name() -> LanguageModelName {
18 LanguageModelName::from("Fake".to_string())
19}
20
21pub fn provider_id() -> LanguageModelProviderId {
22 LanguageModelProviderId::from("fake".to_string())
23}
24
25pub fn provider_name() -> LanguageModelProviderName {
26 LanguageModelProviderName::from("Fake".to_string())
27}
28
29#[derive(Clone, Default)]
30pub struct FakeLanguageModelProvider;
31
32impl LanguageModelProviderState for FakeLanguageModelProvider {
33 type ObservableEntity = ();
34
35 fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
36 None
37 }
38}
39
40impl LanguageModelProvider for FakeLanguageModelProvider {
41 fn id(&self) -> LanguageModelProviderId {
42 provider_id()
43 }
44
45 fn name(&self) -> LanguageModelProviderName {
46 provider_name()
47 }
48
49 fn default_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
50 Some(Arc::new(FakeLanguageModel::default()))
51 }
52
53 fn default_fast_model(&self, _cx: &App) -> Option<Arc<dyn LanguageModel>> {
54 Some(Arc::new(FakeLanguageModel::default()))
55 }
56
57 fn provided_models(&self, _: &App) -> Vec<Arc<dyn LanguageModel>> {
58 vec![Arc::new(FakeLanguageModel::default())]
59 }
60
61 fn is_authenticated(&self, _: &App) -> bool {
62 true
63 }
64
65 fn authenticate(&self, _: &mut App) -> Task<Result<(), AuthenticateError>> {
66 Task::ready(Ok(()))
67 }
68
69 fn configuration_view(&self, _window: &mut Window, _: &mut App) -> AnyView {
70 unimplemented!()
71 }
72
73 fn reset_credentials(&self, _: &mut App) -> Task<Result<()>> {
74 Task::ready(Ok(()))
75 }
76}
77
78impl FakeLanguageModelProvider {
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
92#[derive(Default)]
93pub struct FakeLanguageModel {
94 current_completion_txs: Mutex<Vec<(LanguageModelRequest, mpsc::UnboundedSender<String>)>>,
95}
96
97impl FakeLanguageModel {
98 pub fn pending_completions(&self) -> Vec<LanguageModelRequest> {
99 self.current_completion_txs
100 .lock()
101 .iter()
102 .map(|(request, _)| request.clone())
103 .collect()
104 }
105
106 pub fn completion_count(&self) -> usize {
107 self.current_completion_txs.lock().len()
108 }
109
110 pub fn stream_completion_response(
111 &self,
112 request: &LanguageModelRequest,
113 chunk: impl Into<String>,
114 ) {
115 let current_completion_txs = self.current_completion_txs.lock();
116 let tx = current_completion_txs
117 .iter()
118 .find(|(req, _)| req == request)
119 .map(|(_, tx)| tx)
120 .unwrap();
121 tx.unbounded_send(chunk.into()).unwrap();
122 }
123
124 pub fn end_completion_stream(&self, request: &LanguageModelRequest) {
125 self.current_completion_txs
126 .lock()
127 .retain(|(req, _)| req != request);
128 }
129
130 pub fn stream_last_completion_response(&self, chunk: impl Into<String>) {
131 self.stream_completion_response(self.pending_completions().last().unwrap(), chunk);
132 }
133
134 pub fn end_last_completion_stream(&self) {
135 self.end_completion_stream(self.pending_completions().last().unwrap());
136 }
137}
138
139impl LanguageModel for FakeLanguageModel {
140 fn id(&self) -> LanguageModelId {
141 language_model_id()
142 }
143
144 fn name(&self) -> LanguageModelName {
145 language_model_name()
146 }
147
148 fn provider_id(&self) -> LanguageModelProviderId {
149 provider_id()
150 }
151
152 fn provider_name(&self) -> LanguageModelProviderName {
153 provider_name()
154 }
155
156 fn supports_tools(&self) -> bool {
157 false
158 }
159
160 fn supports_tool_choice(&self, _choice: LanguageModelToolChoice) -> bool {
161 false
162 }
163
164 fn supports_images(&self) -> bool {
165 false
166 }
167
168 fn telemetry_id(&self) -> String {
169 "fake".to_string()
170 }
171
172 fn max_token_count(&self) -> usize {
173 1000000
174 }
175
176 fn count_tokens(&self, _: LanguageModelRequest, _: &App) -> BoxFuture<'static, Result<usize>> {
177 futures::future::ready(Ok(0)).boxed()
178 }
179
180 fn stream_completion(
181 &self,
182 request: LanguageModelRequest,
183 _: &AsyncApp,
184 ) -> BoxFuture<
185 'static,
186 Result<
187 BoxStream<'static, Result<LanguageModelCompletionEvent, LanguageModelCompletionError>>,
188 >,
189 > {
190 let (tx, rx) = mpsc::unbounded();
191 self.current_completion_txs.lock().push((request, tx));
192 async move {
193 Ok(rx
194 .map(|text| Ok(LanguageModelCompletionEvent::Text(text)))
195 .boxed())
196 }
197 .boxed()
198 }
199
200 fn as_fake(&self) -> &Self {
201 self
202 }
203}