Merge branch 'pr/703'

feat(models): Update Gemini chat models

docs/API/SEARCH.md

@@ -32,7 +32,8 @@ The API accepts a JSON object in the request body, where you define the focus mo
   "history": [
     ["human", "Hi, how are you?"],
     ["assistant", "I am doing well, how can I help you today?"]
-  ]
+  ],
+  "stream": false
 }
 ```
 
@@ -71,11 +72,13 @@ The API accepts a JSON object in the request body, where you define the focus mo
   ]
   ```
 
+- **`stream`** (boolean, optional): When set to `true`, enables streaming responses. Default is `false`.
+
 ### Response
 
 The response from the API includes both the final message and the sources used to generate that message.
 
-#### Example Response
+#### Standard Response (stream: false)
 
 ```json
 {
@@ -100,6 +103,28 @@ The response from the API includes both the final message and the sources used t
 }
 ```
 
+#### Streaming Response (stream: true)
+
+When streaming is enabled, the API returns a stream of newline-delimited JSON objects. Each line contains a complete, valid JSON object. The response has Content-Type: application/json.
+
+Example of streamed response objects:
+
+```
+{"type":"init","data":"Stream connected"}
+{"type":"sources","data":[{"pageContent":"...","metadata":{"title":"...","url":"..."}},...]}
+{"type":"response","data":"Perplexica is an "}
+{"type":"response","data":"innovative, open-source "}
+{"type":"response","data":"AI-powered search engine..."}
+{"type":"done"}
+```
+
+Clients should process each line as a separate JSON object. The different message types include:
+
+- **`init`**: Initial connection message
+- **`sources`**: All sources used for the response
+- **`response`**: Chunks of the generated answer text
+- **`done`**: Indicates the stream is complete
+
 ### Fields in the Response
 
 - **`message`** (string): The search result, generated based on the query and focus mode.

src/app/api/search/route.ts

@@ -146,7 +146,10 @@ export const POST = async (req: Request) => {
               }
             } catch (error) {
               reject(
-                Response.json({ message: 'Error parsing data' }, { status: 500 }),
+                Response.json(
+                  { message: 'Error parsing data' },
+                  { status: 500 },
+                ),
               );
             }
           });
@@ -157,7 +160,10 @@ export const POST = async (req: Request) => {
 
           emitter.on('error', (error: any) => {
             reject(
-              Response.json({ message: 'Search error', error }, { status: 500 }),
+              Response.json(
+                { message: 'Search error', error },
+                { status: 500 },
+              ),
             );
           });
         },
@@ -173,18 +179,21 @@ export const POST = async (req: Request) => {
       start(controller) {
         let sources: any[] = [];
 
-        controller.enqueue(encoder.encode("data: " + JSON.stringify({
+        controller.enqueue(
+          encoder.encode(
+            JSON.stringify({
               type: 'init',
-          data: 'Stream connected'
+              data: 'Stream connected',
-        }) + "\n\n"));
+            }) + '\n',
+          ),
+        );
 
         signal.addEventListener('abort', () => {
           emitter.removeAllListeners();
 
           try {
             controller.close();
-          } catch (error) {
+          } catch (error) {}
-          }
         });
 
         emitter.on('data', (data: string) => {
@@ -194,16 +203,24 @@ export const POST = async (req: Request) => {
             const parsedData = JSON.parse(data);
 
             if (parsedData.type === 'response') {
-              controller.enqueue(encoder.encode("data: " + JSON.stringify({
+              controller.enqueue(
+                encoder.encode(
+                  JSON.stringify({
                     type: 'response',
-                data: parsedData.data
+                    data: parsedData.data,
-              }) + "\n\n"));
+                  }) + '\n',
+                ),
+              );
             } else if (parsedData.type === 'sources') {
               sources = parsedData.data;
-              controller.enqueue(encoder.encode("data: " + JSON.stringify({
+              controller.enqueue(
+                encoder.encode(
+                  JSON.stringify({
                     type: 'sources',
-                data: sources
+                    data: sources,
-              }) + "\n\n"));
+                  }) + '\n',
+                ),
+              );
             }
           } catch (error) {
             controller.error(error);
@@ -213,9 +230,13 @@ export const POST = async (req: Request) => {
         emitter.on('end', () => {
           if (signal.aborted) return;
 
-          controller.enqueue(encoder.encode("data: " + JSON.stringify({
+          controller.enqueue(
-            type: 'done'
+            encoder.encode(
-          }) + "\n\n"));
+              JSON.stringify({
+                type: 'done',
+              }) + '\n',
+            ),
+          );
           controller.close();
         });
 
@@ -225,17 +246,16 @@ export const POST = async (req: Request) => {
           controller.error(error);
         });
       },
-      
       cancel() {
         abortController.abort();
-      }
+      },
     });
 
     return new Response(stream, {
       headers: {
         'Content-Type': 'text/event-stream',
         'Cache-Control': 'no-cache, no-transform',
-        'Connection': 'keep-alive',
+        Connection: 'keep-alive',
       },
     });
   } catch (err: any) {

src/lib/providers/gemini.ts

@@ -8,6 +8,10 @@ import { BaseChatModel } from '@langchain/core/language_models/chat_models';
 import { Embeddings } from '@langchain/core/embeddings';
 
 const geminiChatModels: Record<string, string>[] = [
+  {
+    displayName: 'Gemini 2.5 Pro Experimental',
+    key: 'gemini-2.5-pro-exp-03-25',
+  },
   {
     displayName: 'Gemini 2.0 Flash',
     key: 'gemini-2.0-flash',
@@ -17,8 +21,8 @@ const geminiChatModels: Record<string, string>[] = [
     key: 'gemini-2.0-flash-lite',
   },
   {
-    displayName: 'Gemini 2.0 Pro Experimental',
+    displayName: 'Gemini 2.0 Flash Thinking Experimental',
-    key: 'gemini-2.0-pro-exp-02-05',
+    key: 'gemini-2.0-flash-thinking-exp-01-21',
   },
   {
     displayName: 'Gemini 1.5 Flash',