feat: save system prompt

src/api/fetch.ts

 import { getToken } from '../utils/user';
+import { SYSTEM_PROMPT_PREFIX } from '@/constants/chat';
+
 interface StreamFetchProps {
   url: string;
   data: any;
@@ -6,7 +8,7 @@ interface StreamFetchProps {
   abortSignal: AbortController;
 }
 export const streamFetch = ({ url, data, onMessage, abortSignal }: StreamFetchProps) =>
-  new Promise<string>(async (resolve, reject) => {
+  new Promise<{ responseText: string; systemPrompt: string }>(async (resolve, reject) => {
     try {
       const res = await fetch(url, {
         method: 'POST',
@@ -19,15 +21,22 @@ export const streamFetch = ({ url, data, onMessage, abortSignal }: StreamFetchPr
       });
       const reader = res.body?.getReader();
       if (!reader) return;
+
+      if (res.status !== 200) {
+        console.log(res);
+        return reject('chat error');
+      }
+
       const decoder = new TextDecoder();
       let responseText = '';
+      let systemPrompt = '';
 
       const read = async () => {
         try {
           const { done, value } = await reader?.read();
           if (done) {
             if (res.status === 200) {
-              resolve(responseText);
+              resolve({ responseText, systemPrompt });
             } else {
               const parseError = JSON.parse(responseText);
               reject(parseError?.message || '请求异常');
@@ -36,12 +45,19 @@ export const streamFetch = ({ url, data, onMessage, abortSignal }: StreamFetchPr
             return;
           }
           const text = decoder.decode(value).replace(/<br\/>/g, '\n');
-          res.status === 200 && onMessage(text);
-          responseText += text;
+
+          // check system prompt
+          if (text.startsWith(SYSTEM_PROMPT_PREFIX)) {
+            systemPrompt = text.replace(SYSTEM_PROMPT_PREFIX, '');
+          } else {
+            responseText += text;
+            onMessage(text);
+          }
+
           read();
         } catch (err: any) {
           if (err?.message === 'The user aborted a request.') {
-            return resolve(responseText);
+            return resolve({ responseText, systemPrompt });
           }
           reject(typeof err === 'string' ? err : err?.message || '请求异常');
         }

src/constants/chat.ts

+export const SYSTEM_PROMPT_PREFIX = 'SYSTEM_PROMPT:';

src/pages/api/chat/chat.ts

@@ -41,7 +41,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     await connectToDatabase();
     let startTime = Date.now();
 
-    const { model, content, userApiKey, systemKey, userId } = await authChat({
+    const { model, showModelDetail, content, userApiKey, systemKey, userId } = await authChat({
       modelId,
       chatId,
       authorization
@@ -120,7 +120,9 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     const { responseContent } = await gpt35StreamResponse({
       res,
       stream,
-      chatResponse
+      chatResponse,
+      systemPrompt:
+        showModelDetail && filterPrompts[0].role === 'system' ? filterPrompts[0].content : ''
     });
 
     // 只有使用平台的 key 才计费

src/pages/api/chat/init.ts

@@ -48,7 +48,8 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
           $project: {
             _id: '$content._id',
             obj: '$content.obj',
-            value: '$content.value'
+            value: '$content.value',
+            systemPrompt: '$content.systemPrompt'
           }
         }
       ]);

src/pages/api/chat/saveChat.ts

@@ -26,7 +26,8 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     const content = prompts.map((item) => ({
       _id: new mongoose.Types.ObjectId(item._id),
       obj: item.obj,
-      value: item.value
+      value: item.value,
+      systemPrompt: item.systemPrompt
     }));
 
     await authModel({ modelId, userId, authOwner: false });

src/pages/chat/index.tsx

@@ -16,7 +16,13 @@ import {
   MenuButton,
   MenuList,
   MenuItem,
-  Image
+  Image,
+  Button,
+  Modal,
+  ModalOverlay,
+  ModalContent,
+  ModalBody,
+  ModalCloseButton
 } from '@chakra-ui/react';
 import { useToast } from '@/hooks/useToast';
 import { useScreen } from '@/hooks/useScreen';
@@ -29,7 +35,7 @@ import { streamFetch } from '@/api/fetch';
 import Icon from '@/components/Icon';
 import MyIcon from '@/components/Icon';
 import { throttle } from 'lodash';
-import mongoose from 'mongoose';
+import { Types } from 'mongoose';
 
 const SlideBar = dynamic(() => import('./components/SlideBar'));
 const Empty = dynamic(() => import('./components/Empty'));
@@ -67,7 +73,8 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
     history: []
   }); // 聊天框整体数据
 
-  const [inputVal, setInputVal] = useState(''); // 输入的内容
+  const [inputVal, setInputVal] = useState(''); // user input prompt
+  const [showSystemPrompt, setShowSystemPrompt] = useState('');
 
   const isChatting = useMemo(
     () => chatData.history[chatData.history.length - 1]?.status === 'loading',
@@ -199,7 +206,7 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
       };
 
       // 流请求，获取数据
-      const responseText = await streamFetch({
+      const { responseText, systemPrompt } = await streamFetch({
         url: '/api/chat/chat',
         data: {
           prompt,
@@ -228,7 +235,7 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
       }
 
       let newChatId = '';
-      // 保存对话信息
+      // save chat record
       try {
         newChatId = await postSaveChat({
           modelId,
@@ -242,7 +249,8 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
             {
               _id: prompts[1]._id,
               obj: 'AI',
-              value: responseText
+              value: responseText,
+              systemPrompt
             }
           ]
         });
@@ -266,7 +274,8 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
           if (index !== state.history.length - 1) return item;
           return {
             ...item,
-            status: 'finish'
+            status: 'finish',
+            systemPrompt
           };
         })
       }));
@@ -300,13 +309,13 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
     const newChatList: ChatSiteItemType[] = [
       ...chatData.history,
       {
-        _id: String(new mongoose.Types.ObjectId()),
+        _id: String(new Types.ObjectId()),
         obj: 'Human',
         value: val,
         status: 'finish'
       },
       {
-        _id: String(new mongoose.Types.ObjectId()),
+        _id: String(new Types.ObjectId()),
         obj: 'AI',
         value: '',
         status: 'loading'
@@ -492,10 +501,24 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
                 </Menu>
                 <Box flex={'1 0 0'} w={0} overflow={'hidden'}>
                   {item.obj === 'AI' ? (
-                    <Markdown
-                      source={item.value}
-                      isChatting={isChatting && index === chatData.history.length - 1}
-                    />
+                    <>
+                      <Markdown
+                        source={item.value}
+                        isChatting={isChatting && index === chatData.history.length - 1}
+                      />
+                      {item.systemPrompt && (
+                        <Button
+                          size={'xs'}
+                          mt={2}
+                          fontWeight={'normal'}
+                          colorScheme={'gray'}
+                          variant={'outline'}
+                          onClick={() => setShowSystemPrompt(item.systemPrompt || '')}
+                        >
+                          查看提示词
+                        </Button>
+                      )}
+                    </>
                   ) : (
                     <Box className="markdown" whiteSpace={'pre-wrap'}>
                       <Box as={'p'}>{item.value}</Box>
@@ -617,6 +640,19 @@ const Chat = ({ modelId, chatId }: { modelId: string; chatId: string }) => {
           </Box>
         </Box>
       </Flex>
+
+      {/* system prompt show modal */}
+      {
+        <Modal isOpen={!!showSystemPrompt} onClose={() => setShowSystemPrompt('')}>
+          <ModalOverlay />
+          <ModalContent maxW={'min(90vw, 600px)'} pr={2} maxH={'80vh'} overflowY={'auto'}>
+            <ModalCloseButton />
+            <ModalBody pt={10} fontSize={'sm'} whiteSpace={'pre-wrap'} textAlign={'justify'}>
+              {showSystemPrompt}
+            </ModalBody>
+          </ModalContent>
+        </Modal>
+      }
     </Flex>
   );
 };

src/service/models/chat.ts

@@ -41,6 +41,10 @@ const ChatSchema = new Schema({
         value: {
           type: String,
           required: true
+        },
+        systemPrompt: {
+          type: String,
+          default: ''
         }
       }
     ],

src/service/utils/auth.ts

@@ -75,7 +75,7 @@ export const authModel = async ({
     };
   }
 
-  return { model };
+  return { model, showModelDetail: model.share.isShareDetail || userId === String(model.userId) };
 };
 
 // 获取对话校验
@@ -91,7 +91,12 @@ export const authChat = async ({
   const userId = await authToken(authorization);
 
   // 获取 model 数据
-  const { model } = await authModel({ modelId, userId, authOwner: false, reserveDetail: true });
+  const { model, showModelDetail } = await authModel({
+    modelId,
+    userId,
+    authOwner: false,
+    reserveDetail: true
+  });
 
   // 聊天内容
   let content: ChatItemSimpleType[] = [];
@@ -124,7 +129,8 @@ export const authChat = async ({
     systemKey,
     content,
     userId,
-    model
+    model,
+    showModelDetail
   };
 };
 

src/service/utils/openai.ts

@@ -7,6 +7,7 @@ import { User } from '../models/user';
 import { formatPrice } from '@/utils/user';
 import { embeddingModel } from '@/constants/model';
 import { pushGenerateVectorBill } from '../events/pushBill';
+import { SYSTEM_PROMPT_PREFIX } from '@/constants/chat';
 
 /* 获取用户 api 的 openai 信息 */
 export const getUserApiOpenai = async (userId: string) => {
@@ -110,11 +111,13 @@ export const openaiCreateEmbedding = async ({
 export const gpt35StreamResponse = ({
   res,
   stream,
-  chatResponse
+  chatResponse,
+  systemPrompt = ''
 }: {
   res: NextApiResponse;
   stream: PassThrough;
   chatResponse: any;
+  systemPrompt?: string;
 }) =>
   new Promise<{ responseContent: string }>(async (resolve, reject) => {
     try {
@@ -144,8 +147,8 @@ export const gpt35StreamResponse = ({
         }
       };
 
-      const decoder = new TextDecoder();
       try {
+        const decoder = new TextDecoder();
         const parser = createParser(onParse);
         for await (const chunk of chatResponse.data as any) {
           if (stream.destroyed) {
@@ -157,6 +160,12 @@ export const gpt35StreamResponse = ({
       } catch (error) {
         console.log('pipe error', error);
       }
+
+      // push system prompt
+      !stream.destroyed &&
+        systemPrompt &&
+        stream.push(`${SYSTEM_PROMPT_PREFIX}${systemPrompt.replace(/\n/g, '<br/>')}`);
+
       // close stream
       !stream.destroyed && stream.push(null);
       stream.destroy();

src/types/chat.d.ts

 export type ChatItemSimpleType = {
   obj: 'Human' | 'AI' | 'SYSTEM';
   value: string;
+  systemPrompt?: string;
 };
 export type ChatItemType = {
   _id: string;