[V0_FILE]typescriptreact:file="app/page.tsx" "use client" import { useMemo } from "react" import { ThemeProvider, createTheme } from "@mui/material/styles" import CssBaseline from "@mui/material/CssBaseline" import Box from "@mui/material/Box" import ChatLayout from "@/components/layout/chat-layout" export default function Home() { // Use memo to create the theme only when needed const theme = useMemo( () => createTheme({ palette: { primary: { main: "#1976d2", }, background: { default: "#f5f8fa", }, }, }), [], ) return ( ) } [V0_FILE]typescriptreact:file="components/layout/chat-layout.tsx" isFixed="true" isQuickEdit="true" "use client" import { useState, useMemo } from "react" import Box from "@mui/material/Box" import Header from "@/components/header/header" import Sidebar from "@/components/sidebar/sidebar" import ChatArea from "@/components/chat/chat-area" import type { User, Message } from "@/types/chat-types" // Mock data - in a real app, this would come from GraphQL const mockUsers: User[] = [ { id: "1", name: "user1", avatar: "U", status: "offline", color: "#673ab7" }, { id: "2", name: "fiwe", avatar: "F", status: "offline", color: "#4caf50" }, { id: "3", name: "cip", avatar: "C", status: "offline", color: "#2196f3" }, { id: "4", name: "cip", avatar: "C", status: "offline", color: "#2196f3" }, { id: "5", name: "testusr", avatar: "T", status: "offline", color: "#673ab7" }, { id: "6", name: "test", avatar: "T", status: "offline", color: "#9c27b0" }, { id: "7", name: "tester", avatar: "T", status: "offline", color: "#4caf50" }, ] const mockMessages: Message[] = [ { id: "1", senderId: "1", text: "Hello BinBytes", timestamp: "04/19/2018 11:24", isMine: false }, { id: "2", senderId: "1", text: "How are you?", timestamp: "04/19/2018 11:24", isMine: false }, { id: "3", senderId: "me", text: "I am doing good", timestamp: "04/19/2018 01:16", isMine: true }, { id: "4", senderId: "me", text: "thanks for asking", timestamp: "04/19/2018 01:16", isMine: true }, ] export default function ChatLayout() { const [selectedUser, setSelectedUser] = useState(mockUsers[0]) const [messages, setMessages] = useState(mockMessages) const [searchQuery, setSearchQuery] = useState("") // Filter users based on search query using useMemo for performance const filteredUsers = useMemo(() => { return mockUsers.filter((user) => user.name.toLowerCase().includes(searchQuery.toLowerCase())) }, [searchQuery]) const handleSendMessage = (text: string) => { if (!text.trim() || !selectedUser) return const newMessage: Message = { id: Date.now().toString(), senderId: "me", text, timestamp: new Date() .toLocaleString("en-US", { month: "2-digit", day: "2-digit", year: "numeric", hour: "2-digit", minute: "2-digit", hour12: false, }) .replace(",", ""), isMine: true, } setMessages([...messages, newMessage]) } const handleUserSelect = (user: User) => { setSelectedUser(user) // In a real app, you would fetch messages for this user from GraphQL here } const handleSearch = (query: string) => { setSearchQuery(query) } return (

) } [V0_FILE]typescriptreact:file="components/header/header.tsx" "use client" import { useMemo } from "react" import AppBar from "@mui/material/AppBar" import Toolbar from "@mui/material/Toolbar" import Typography from "@mui/material/Typography" import Button from "@mui/material/Button" import { styled } from "@mui/material/styles" interface HeaderProps { username: string } // Using styled API for custom styling const StyledAppBar = styled(AppBar)(({ theme }) => ({ backgroundColor: theme.palette.background.default, color: theme.palette.text.primary, boxShadow: "none", borderBottom: `1px solid ${theme.palette.divider}`, })) export default function Header({ username }: HeaderProps) { // Using useMemo to memoize the welcome text const welcomeText = useMemo(() => `Welcome ${username}`, [username]) return ( {welcomeText} ) } [V0_FILE]typescriptreact:file="components/sidebar/sidebar.tsx" "use client" import { useMemo } from "react" import Box from "@mui/material/Box" import TextField from "@mui/material/TextField" import List from "@mui/material/List" import { styled } from "@mui/material/styles" import UserListItem from "./user-list-item" import type { User } from "@/types/chat-types" import InputAdornment from "@mui/material/InputAdornment" import SearchIcon from "@mui/icons-material/Search" interface SidebarProps { users: User[] selectedUser: User | null onUserSelect: (user: User) => void onSearch: (query: string) => void searchQuery: string } const SidebarContainer = styled(Box)(({ theme }) => ({ width: 280, borderRight: `1px solid ${theme.palette.divider}`, display: "flex", flexDirection: "column", backgroundColor: theme.palette.background.paper, })) const SearchContainer = styled(Box)(({ theme }) => ({ padding: theme.spacing(2), borderBottom: `1px solid ${theme.palette.divider}`, })) export default function Sidebar({ users, selectedUser, onUserSelect, onSearch, searchQuery }: SidebarProps) { // Using useMemo to optimize the search field const searchField = useMemo( () => ( onSearch(e.target.value)} InputProps={{ startAdornment: ( ), }} /> ), [searchQuery, onSearch], ) return ( {searchField} {users.map((user) => ( onUserSelect(user)} /> ))} ) } [V0_FILE]typescriptreact:file="components/sidebar/user-list-item.tsx" "use client" import { useMemo } from "react" import ListItem from "@mui/material/ListItem" import ListItemButton from "@mui/material/ListItemButton" import ListItemText from "@mui/material/ListItemText" import ListItemAvatar from "@mui/material/ListItemAvatar" import Avatar from "@mui/material/Avatar" import Typography from "@mui/material/Typography" import Box from "@mui/material/Box" import type { User } from "@/types/chat-types" import FiberManualRecordIcon from "@mui/icons-material/FiberManualRecord" interface UserListItemProps { user: User isSelected: boolean onSelect: () => void } export default function UserListItem({ user, isSelected, onSelect }: UserListItemProps) { // Using useMemo to create the avatar component const avatarComponent = useMemo( () => {user.avatar}, [user.avatar, user.color], ) // Using useMemo for the status indicator const statusIndicator = useMemo( () => ( {user.status} ), [user.status], ) return ( {avatarComponent} ) } [V0_FILE]typescriptreact:file="components/chat/chat-area.tsx" isFixed="true" isQuickEdit="true" "use client" import { useMemo, useRef, useEffect } from "react" import Box from "@mui/material/Box" import Typography from "@mui/material/Typography" import Avatar from "@mui/material/Avatar" import Divider from "@mui/material/Divider" import { styled } from "@mui/material/styles" import MessageList from "./message-list" import MessageInput from "./message-input" import type { User, Message } from "@/types/chat-types" interface ChatAreaProps { selectedUser: User | null messages: Message[] onSendMessage: (text: string) => void } const ChatContainer = styled(Box)(({ theme }) => ({ display: "flex", flexDirection: "column", flexGrow: 1, height: "100%", overflow: "hidden", })) const ChatHeader = styled(Box)(({ theme }) => ({ padding: theme.spacing(2), display: "flex", alignItems: "center", borderBottom: `1px solid ${theme.palette.divider}`, })) export default function ChatArea({ selectedUser, messages, onSendMessage }: ChatAreaProps) { const messagesEndRef = useRef(null) // Scroll to bottom when messages change useEffect(() => { messagesEndRef.current?.scrollIntoView({ behavior: "smooth" }) }, [messages]) // Using useMemo for the header component const chatHeader = useMemo(() => { if (!selectedUser) return null return ( {selectedUser.avatar} Chat with {selectedUser.name} ) }, [selectedUser]) return ( {chatHeader} ) } [V0_FILE]typescriptreact:file="components/chat/message-list.tsx" "use client" import type React from "react" import { useMemo } from "react" import Box from "@mui/material/Box" import { styled } from "@mui/material/styles" import MessageBubble from "./message-bubble" import type { Message } from "@/types/chat-types" interface MessageListProps { messages: Message[] messagesEndRef: React.RefObject } const MessageListContainer = styled(Box)(({ theme }) => ({ flexGrow: 1, overflow: "auto", padding: theme.spacing(2), display: "flex", flexDirection: "column", gap: theme.spacing(2), })) export default function MessageList({ messages, messagesEndRef }: MessageListProps) { // Using useMemo to optimize the message list rendering const messageItems = useMemo(() => { return messages.map((message) => ) }, [messages]) return ( {messageItems}

) } [V0_FILE]typescriptreact:file="components/chat/message-bubble.tsx" "use client" import { useMemo } from "react" import Box from "@mui/material/Box" import Paper from "@mui/material/Paper" import Typography from "@mui/material/Typography" import { styled } from "@mui/material/styles" import type { Message } from "@/types/chat-types" interface MessageBubbleProps { message: Message } const MessageContainer = styled(Box, { shouldForwardProp: (prop) => prop !== "isMine", })<{ isMine: boolean }>(({ theme, isMine }) => ({ display: "flex", flexDirection: "column", alignItems: isMine ? "flex-end" : "flex-start", alignSelf: isMine ? "flex-end" : "flex-start", maxWidth: "70%", })) const MessagePaper = styled(Paper, { shouldForwardProp: (prop) => prop !== "isMine", })<{ isMine: boolean }>(({ theme, isMine }) => ({ padding: theme.spacing(1.5), backgroundColor: isMine ? "#e3f2fd" : "#f5f5f5", borderRadius: 12, })) const TimeStamp = styled(Typography)(({ theme }) => ({ fontSize: "0.75rem", color: theme.palette.text.secondary, marginTop: 4, })) export default function MessageBubble({ message }: MessageBubbleProps) { // Using useMemo to optimize the message bubble rendering const messageContent = useMemo( () => ( {message.text} {message.timestamp} ), [message], ) return messageContent } [V0_FILE]typescriptreact:file="components/chat/message-input.tsx" isFixed="true" isQuickEdit="true" "use client" import type React from "react" import { useState, useMemo, useCallback } from "react" import Box from "@mui/material/Box" import TextField from "@mui/material/TextField" import Button from "@mui/material/Button" import { styled } from "@mui/material/styles" import SendIcon from "@mui/icons-material/Send" interface MessageInputProps { onSendMessage: (text: string) => void disabled?: boolean } const InputContainer = styled(Box)(({ theme }) => ({ display: "flex", padding: theme.spacing(2), gap: theme.spacing(1), })) export default function MessageInput({ onSendMessage, disabled = false }: MessageInputProps) { const [message, setMessage] = useState("") const handleSend = useCallback(() => { if (message.trim()) { onSendMessage(message) setMessage("") } }, [message, onSendMessage]) const handleKeyPress = (e: React.KeyboardEvent) => { if (e.key === "Enter" && !e.shiftKey) { e.preventDefault() handleSend() } } // Using useMemo for the send button const sendButton = useMemo( () => ( ), [disabled, message, handleSend], ) return ( setMessage(e.target.value)} onKeyPress={handleKeyPress} disabled={disabled} multiline maxRows={4} /> {sendButton} ) } [V0_FILE]typescriptreact:file="types/chat-types.ts" export interface User { id: string name: string avatar: string status: "online" | "offline" color: string } export interface Message { id: string senderId: string text: string timestamp: string isMine: boolean }