feat: model parameters customisation (#31)

issue #14

src/api/customApi.ts

@@ -1,4 +1,4 @@
-import { MessageInterface } from '@type/chat';
+import { ConfigInterface, MessageInterface } from '@type/chat';
 
 export const endpoint = 'https://api.openai.com/v1/chat/completions';
 
@@ -23,7 +23,8 @@ export const validateApiKey = async (apiKey: string) => {
 
 export const getChatCompletion = async (
   apiKey: string,
-  messages: MessageInterface[]
+  messages: MessageInterface[],
+  config: ConfigInterface
 ) => {
   const response = await fetch(endpoint, {
     method: 'POST',
@@ -34,6 +35,7 @@ export const getChatCompletion = async (
     body: JSON.stringify({
       model: 'gpt-3.5-turbo',
       messages,
+      ...config,
     }),
   });
   if (!response.ok) throw new Error(await response.text());
@@ -44,7 +46,8 @@ export const getChatCompletion = async (
 
 export const getChatCompletionStream = async (
   apiKey: string,
-  messages: MessageInterface[]
+  messages: MessageInterface[],
+  config: ConfigInterface
 ) => {
   const response = await fetch(endpoint, {
     method: 'POST',
@@ -55,6 +58,7 @@ export const getChatCompletionStream = async (
     body: JSON.stringify({
       model: 'gpt-3.5-turbo',
       messages,
+      ...config,
       stream: true,
     }),
   });

src/api/freeApi.ts

@@ -1,8 +1,11 @@
-import { MessageInterface } from '@type/chat';
+import { ConfigInterface, MessageInterface } from '@type/chat';
 
 export const endpoint = 'https://chatgpt-api.shn.hk/v1/';
 
-export const getChatCompletion = async (messages: MessageInterface[]) => {
+export const getChatCompletion = async (
+  messages: MessageInterface[],
+  config: ConfigInterface
+) => {
   const response = await fetch(endpoint, {
     method: 'POST',
     headers: {
@@ -11,6 +14,7 @@ export const getChatCompletion = async (messages: MessageInterface[]) => {
     body: JSON.stringify({
       model: 'gpt-3.5-turbo',
       messages,
+      ...config,
     }),
   });
   if (!response.ok) throw new Error(await response.text());
@@ -19,7 +23,10 @@ export const getChatCompletion = async (messages: MessageInterface[]) => {
   return data;
 };
 
-export const getChatCompletionStream = async (messages: MessageInterface[]) => {
+export const getChatCompletionStream = async (
+  messages: MessageInterface[],
+  config: ConfigInterface
+) => {
   const response = await fetch(endpoint, {
     method: 'POST',
     headers: {
@@ -28,6 +35,7 @@ export const getChatCompletionStream = async (messages: MessageInterface[]) => {
     body: JSON.stringify({
       model: 'gpt-3.5-turbo',
       messages,
+      ...config,
       stream: true,
     }),
   });

src/components/Chat/ChatContent/ChatTitle.tsx

@@ -1,11 +1,73 @@
-import React from 'react';
+import React, { useEffect, useState } from 'react';
+import { shallow } from 'zustand/shallow';
+import useStore from '@store/store';
+import ConfigMenu from '@components/ConfigMenu';
+import { ChatInterface, ConfigInterface } from '@type/chat';
+import { defaultChatConfig } from '@constants/chat';
 
-const ChatTitle = () => {
-  return (
-    <div className='flex w-full items-center justify-center gap-1 border-b border-black/10 bg-gray-50 p-3 text-gray-500 dark:border-gray-900/50 dark:bg-gray-700 dark:text-gray-300'>
-      Model: Default
-    </div>
+const ChatTitle = React.memo(() => {
+  const config = useStore(
+    (state) =>
+      state.chats &&
+      state.chats.length > 0 &&
+      state.currentChatIndex >= 0 &&
+      state.currentChatIndex < state.chats.length
+        ? state.chats[state.currentChatIndex].config
+        : undefined,
+    shallow
   );
-};
+  const setChats = useStore((state) => state.setChats);
+  const currentChatIndex = useStore((state) => state.currentChatIndex);
+  const [isModalOpen, setIsModalOpen] = useState<boolean>(false);
+
+  const setConfig = (config: ConfigInterface) => {
+    const updatedChats: ChatInterface[] = JSON.parse(
+      JSON.stringify(useStore.getState().chats)
+    );
+    updatedChats[currentChatIndex].config = config;
+    setChats(updatedChats);
+  };
+
+  // for migrating from old ChatInterface to new ChatInterface (with config)
+  useEffect(() => {
+    if (!config) {
+      const updatedChats: ChatInterface[] = JSON.parse(
+        JSON.stringify(useStore.getState().chats)
+      );
+      updatedChats[currentChatIndex].config = { ...defaultChatConfig };
+      setChats(updatedChats);
+    }
+  }, [currentChatIndex]);
+
+  return config ? (
+    <>
+      <div
+        className='flex gap-4 flex-wrap w-full items-center justify-center gap-1 border-b border-black/10 bg-gray-50 p-3 text-gray-500 dark:border-gray-900/50 dark:bg-gray-700 dark:text-gray-300 cursor-pointer'
+        onClick={() => {
+          setIsModalOpen(true);
+        }}
+      >
+        <div className='text-center p-1 rounded-md bg-gray-900/10 hover:bg-gray-900/50'>
+          Model: Default
+        </div>
+        <div className='text-center p-1 rounded-md bg-gray-900/10 hover:bg-gray-900/50'>
+          Temperature: {config.temperature}
+        </div>
+        <div className='text-center p-1 rounded-md bg-gray-900/10 hover:bg-gray-900/50'>
+          PresencePenalty: {config.presence_penalty}
+        </div>
+      </div>
+      {isModalOpen && (
+        <ConfigMenu
+          setIsModalOpen={setIsModalOpen}
+          config={config}
+          setConfig={setConfig}
+        />
+      )}
+    </>
+  ) : (
+    <></>
+  );
+});
 
 export default ChatTitle;

src/components/Chat/ChatContent/Message/NewMessageButton.tsx

@@ -4,7 +4,7 @@ import useStore from '@store/store';
 import PlusIcon from '@icon/PlusIcon';
 
 import { ChatInterface } from '@type/chat';
-import { defaultSystemMessage } from '@constants/chat';
+import { defaultChatConfig, defaultSystemMessage } from '@constants/chat';
 
 const NewMessageButton = React.memo(
   ({ messageIndex }: { messageIndex: number }) => {
@@ -26,7 +26,13 @@ const NewMessageButton = React.memo(
 
         updatedChats.unshift({
           title,
-          messages: [{ role: 'system', content: defaultSystemMessage }],
+          messages: [
+            {
+              role: 'system',
+              content: defaultSystemMessage,
+            },
+          ],
+          config: { ...defaultChatConfig },
         });
         setChats(updatedChats);
         setCurrentChatIndex(0);

src/components/ConfigMenu/ConfigMenu.tsx

@@ -0,0 +1,83 @@
+import React, { useState } from 'react';
+import PopupModal from '@components/PopupModal';
+import { ConfigInterface } from '@type/chat';
+
+const ConfigMenu = ({
+  setIsModalOpen,
+  config,
+  setConfig,
+}: {
+  setIsModalOpen: React.Dispatch<React.SetStateAction<boolean>>;
+  config: ConfigInterface;
+  setConfig: (config: ConfigInterface) => void;
+}) => {
+  const [_temperature, _setTemperature] = useState<number>(config.temperature);
+  const [_presencePenalty, _setPresencePenalty] = useState<number>(
+    config.presence_penalty
+  );
+
+  const handleConfirm = () => {
+    setConfig({
+      temperature: _temperature,
+      presence_penalty: _presencePenalty,
+    });
+    setIsModalOpen(false);
+  };
+
+  return (
+    <PopupModal
+      title='Configuration'
+      setIsModalOpen={setIsModalOpen}
+      handleConfirm={handleConfirm}
+    >
+      <div className='p-6 border-b border-gray-200 dark:border-gray-600'>
+        <div>
+          <label className='block text-sm font-medium text-gray-900 dark:text-white'>
+            Temperature: {_temperature}
+          </label>
+          <input
+            id='default-range'
+            type='range'
+            value={_temperature}
+            onChange={(e) => {
+              _setTemperature(Number(e.target.value));
+            }}
+            min={0}
+            max={2}
+            step={0.1}
+            className='w-full h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer'
+          />
+          <div className='min-w-fit text-gray-500 dark:text-gray-300 text-sm mt-2'>
+            What sampling temperature to use, between 0 and 2. Higher values
+            like 0.8 will make the output more random, while lower values like
+            0.2 will make it more focused and deterministic.
+          </div>
+        </div>
+        <div className='mt-5 pt-5 border-t border-gray-500'>
+          <label className='block text-sm font-medium text-gray-900 dark:text-white'>
+            Presence Penalty: {_presencePenalty}
+          </label>
+          <input
+            id='default-range'
+            type='range'
+            value={_presencePenalty}
+            onChange={(e) => {
+              _setPresencePenalty(Number(e.target.value));
+            }}
+            min={-2}
+            max={2}
+            step={0.1}
+            className='w-full h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer'
+          />
+          <div className='min-w-fit text-gray-500 dark:text-gray-300 text-sm mt-2'>
+            Number between -2.0 and 2.0. Positive values penalize new tokens
+            based on whether they appear in the text so far, increasing the
+            model's likelihood to talk about new topics.
+          </div>
+        </div>
+      </div>
+    </PopupModal>
+  );
+};
+
+export default ConfigMenu;

src/components/ConfigMenu/index.ts

@@ -0,0 +1 @@
+export { default } from './ConfigMenu';

src/components/PopupModal/PopupModal.tsx

@@ -31,7 +31,7 @@ const PopupModal = ({
     return ReactDOM.createPortal(
       <div className='fixed top-0 left-0 z-[999] w-full p-4 overflow-x-hidden overflow-y-auto h-full flex justify-center items-center'>
         <div className='relative z-2 max-w-2xl md:h-auto flex justify-center items-center'>
-          <div className='relative bg-white rounded-lg shadow dark:bg-gray-700'>
+          <div className='relative bg-gray-50 rounded-lg shadow dark:bg-gray-700'>
             <div className='flex items-center justify-between p-4 border-b rounded-t dark:border-gray-600'>
               <h3 className='ml-2 text-lg font-semibold text-gray-900 dark:text-white'>
                 {title}

src/constants/chat.ts

@@ -1,3 +1,5 @@
+import { ConfigInterface } from '@type/chat';
+
 const date = new Date();
 const dateString =
   date.getFullYear() +
@@ -10,3 +12,8 @@ const dateString =
 export const defaultSystemMessage = `You are ChatGPT, a large language model trained by OpenAI.
 Knowledge cutoff: 2021-09
 Current date: ${dateString}`;
+
+export const defaultChatConfig: ConfigInterface = {
+  temperature: 1,
+  presence_penalty: 0,
+};

src/hooks/useAddChat.ts

@@ -1,6 +1,6 @@
 import React from 'react';
 import useStore from '@store/store';
-import { defaultSystemMessage } from '@constants/chat';
+import { defaultChatConfig, defaultSystemMessage } from '@constants/chat';
 import { ChatInterface } from '@type/chat';
 
 const useAddChat = () => {
@@ -22,6 +22,7 @@ const useAddChat = () => {
       updatedChats.unshift({
         title,
         messages: [{ role: 'system', content: defaultSystemMessage }],
+        config: { ...defaultChatConfig },
       });
       setChats(updatedChats);
       setCurrentChatIndex(0);

src/hooks/useInitialiseNewChat.ts

@@ -1,7 +1,7 @@
 import React from 'react';
 import useStore from '@store/store';
 import { MessageInterface } from '@type/chat';
-import { defaultSystemMessage } from '@constants/chat';
+import { defaultChatConfig, defaultSystemMessage } from '@constants/chat';
 
 const useInitialiseNewChat = () => {
   const setChats = useStore((state) => state.setChats);
@@ -16,6 +16,7 @@ const useInitialiseNewChat = () => {
       {
         title: 'New Chat',
         messages: [message],
+        config: { ...defaultChatConfig },
       },
     ]);
     setCurrentChatIndex(0);

src/hooks/useSubmit.ts

@@ -33,12 +33,14 @@ const useSubmit = () => {
     try {
       if (apiFree) {
         stream = await getChatCompletionStreamFree(
-          chats[currentChatIndex].messages
+          chats[currentChatIndex].messages,
+          chats[currentChatIndex].config
         );
       } else if (apiKey) {
         stream = await getChatCompletionStreamCustom(
           apiKey,
-          chats[currentChatIndex].messages
+          chats[currentChatIndex].messages,
+          chats[currentChatIndex].config
         );
       }
 

src/main.css

@@ -27,6 +27,14 @@
     height: 100%;
   }
 
+  input[type='range']::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    @apply w-4;
+    @apply h-4;
+    @apply rounded-full;
+    background: rgba(16, 163, 127);
+  }
+
   ::-webkit-scrollbar {
     height: 1rem;
     width: 0.5rem;

src/types/chat.ts

@@ -9,4 +9,10 @@ export interface MessageInterface {
 export interface ChatInterface {
   title: string;
   messages: MessageInterface[];
+  config: ConfigInterface;
+}
+
+export interface ConfigInterface {
+  temperature: number;
+  presence_penalty: number;
 }