update model when a message is added

frontend/app/element/emojipalette.tsx

@@ -10,7 +10,9 @@ import { Palette, PaletteButton, PaletteContent } from "./palette";
 
 import "./emojiPalette.less";
 
-const emojiList = [
+type EmojiItem = { emoji: string; name: string };
+
+const emojiList: EmojiItem[] = [
     // Smileys & Emotion
     { emoji: "😀", name: "grinning face" },
     { emoji: "😁", name: "beaming face with smiling eyes" },
@@ -214,15 +216,20 @@ const emojiList = [
 interface EmojiPaletteProps {
     className?: string;
     placement?: Placement;
+    onSelect?: (_: EmojiItem) => void;
 }
 
-const EmojiPalette = memo(({ className, placement }: EmojiPaletteProps) => {
+const EmojiPalette = memo(({ className, placement, onSelect }: EmojiPaletteProps) => {
     const [searchTerm, setSearchTerm] = useState("");
 
     const handleSearchChange = (val: string) => {
         setSearchTerm(val.toLowerCase());
     };
 
+    const handleSelect = (item: { name: string; emoji: string }) => {
+        onSelect?.(item);
+    };
+
     const filteredEmojis = emojiList.filter((item) => item.name.includes(searchTerm));
 
     return (
@@ -241,13 +248,7 @@ const EmojiPalette = memo(({ className, placement }: EmojiPaletteProps) => {
                     <div className="emoji-grid">
                         {filteredEmojis.length > 0 ? (
                             filteredEmojis.map((item, index) => (
-                                <Button
-                                    key={index}
-                                    className="ghost emoji-button"
-                                    onClick={() => {
-                                        console.log(`Emoji selected: ${item.emoji}`);
-                                    }}
-                                >
+                                <Button key={index} className="ghost emoji-button" onClick={() => handleSelect(item)}>
                                     {item.emoji}
                                 </Button>
                             ))
@@ -264,3 +265,4 @@ const EmojiPalette = memo(({ className, placement }: EmojiPaletteProps) => {
 EmojiPalette.displayName = "EmojiPalette";
 
 export { EmojiPalette };
+export type { EmojiItem };

frontend/app/view/chat/chat.tsx

@@ -3,6 +3,7 @@
 
 import { ChatMessage, ChatMessages } from "@/app/view/chat/chatmessages";
 import { UserStatus } from "@/app/view/chat/userlist";
+import * as jotai from "jotai";
 import { Channels } from "./channels";
 import { ChatBox } from "./chatbox";
 import { channels, messages, users } from "./data";
@@ -14,19 +15,23 @@ class ChatModel {
     viewType: string;
     channels: MenuItem[];
     users: UserStatus[];
-    messages: ChatMessage[];
+    messagesAtom: jotai.PrimitiveAtom<ChatMessage[]>;
 
     constructor(blockId: string) {
         this.viewType = "chat";
         this.channels = channels;
-        this.messages = messages;
         this.users = users;
+        this.messagesAtom = jotai.atom(messages);
     }
+
+    addMessageAtom = jotai.atom(null, (get, set, newMessage: ChatMessage) => {
+        const currentMessages = get(this.messagesAtom);
+        set(this.messagesAtom, [...currentMessages, newMessage]);
+    });
 }
 
 function makeChatModel(blockId: string): ChatModel {
-    const cpuPlotViewModel = new ChatModel(blockId);
-    return cpuPlotViewModel;
+    return new ChatModel(blockId);
 }
 
 interface ChatProps {
@@ -34,7 +39,19 @@ interface ChatProps {
 }
 
 const Chat = ({ model }: ChatProps) => {
-    const { channels, users, messages } = model;
+    const { channels, users } = model;
+    const messages = jotai.useAtomValue(model.messagesAtom);
+    const [, appendMessage] = jotai.useAtom(model.addMessageAtom);
+
+    const handleSendMessage = (message: string) => {
+        const newMessage: ChatMessage = {
+            id: `${Date.now()}`,
+            username: "currentUser",
+            message: message,
+        };
+        appendMessage(newMessage);
+    };
+
     return (
         <div className="chat-view">
             <Channels channels={channels}></Channels>
@@ -42,7 +59,7 @@ const Chat = ({ model }: ChatProps) => {
                 <div className="message-wrapper">
                     <ChatMessages messages={messages}></ChatMessages>
                 </div>
-                <ChatBox onSendMessage={(message: string) => console.log("message: ", message)} />
+                <ChatBox onSendMessage={(message: string) => handleSendMessage(message)} />
             </div>
             <UserList users={users}></UserList>
         </div>

frontend/app/view/chat/chatmessages.tsx

@@ -30,7 +30,7 @@ const ChatMessages = memo(({ messages, className }: ChatMessagesProps) => {
     };
 
     useEffect(() => {
-        scrollToBottom();
+        // scrollToBottom();
     }, [messages]);
 
     return (