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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Chat App</title>
<script src="https://cdn.tailwindcss.com"></script>
<style>
.chat-container {
display: flex;
height: 85vh;
padding: 0 2rem;
}
.message-box {
flex-grow: 1;
overflow-y: auto;
padding: 1rem;
background-color: #f7f7f7;
}
.message {
margin-bottom: 1rem;
padding: 0.5rem 1rem;
border-radius: 0.5rem;
}
.message.from {
background-color: #d1e7dd;
text-align: right;
max-width: 90%;
}
.message.to {
background-color: #ffffff;
text-align: left;
max-width: 90%;
}
.message-box-placeholder {
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
height: 100%;
}
.message-box-placeholder p {
font-size: 1.5rem;
font-weight: 700;
}
.message-box-placeholder span {
color: #808080;
}
.clickable {
list-style: none;
padding: 5px;
margin: 5px 0;
cursor: pointer;
border-radius: 5px;
}
.clickable:hover {
background-color: #ffffff;
color: #000000;
}
</style>
</head>
<body class="flex items-center justify-center bg-gray-100">
<div
id="register-form"
class="w-full max-w-2xl p-4 bg-white rounded shadow-md mt-[2rem]"
>
<div class="mb-4">
<h2 class="text-xl font-bold">Chat App</h2>
</div>
<div>
<div class="w-full">
<h3 class="text-lg font-semibold">Register</h3>
<input
id="register-username"
type="text"
placeholder="Username"
class="w-full p-2 mt-2 border rounded"
/>
<input
id="register-password"
type="password"
placeholder="Password"
class="w-full p-2 mt-2 border rounded"
/>
<button
onclick="register()"
class="w-full px-4 py-2 mt-2 text-white bg-green-500 rounded"
>
Register
</button>
<p class="mt-2">
Already have an account?
<a href="#" onclick="showLoginForm()" class="text-green-500"
>Login</a
>
</p>
</div>
</div>
</div>
<div
id="login-form"
class="hidden w-full max-w-2xl p-4 bg-white rounded shadow-md mt-[2rem]"
>
<div class="mb-4">
<h2 class="text-xl font-bold">Chat App</h2>
</div>
<div>
<div>
<h3 class="text-lg font-semibold">Login</h3>
<input
id="login-username"
type="text"
placeholder="Username"
class="w-full p-2 mt-2 border rounded"
/>
<input
id="login-password"
type="password"
placeholder="Password"
class="w-full p-2 mt-2 border rounded"
/>
<button
onclick="login()"
class="w-full px-4 py-2 mt-2 text-white bg-green-500 rounded"
>
Login
</button>
<p class="mt-2">
Don't have an account?
<a href="#" onclick="showRegisterForm()" class="text-green-500"
>Register</a
>
</p>
</div>
</div>
</div>
<div
id="chat-container"
class="w-full hidden h-full max-w-5xl p-4 rounded shadow-md"
>
<div class="mb-4 mx-[3rem]">
<h2 class="text-xl font-bold">Chat App</h2>
</div>
<div class="chat-container h-full my-4">
<div class="w-1/4 p-4 bg-gray-100 flex flex-col justify-between">
<div class="">
<div class="flex justify-between mb-4">
<h3 class="text-lg font-semibold">Users & Groups</h3>
</div>
<div id="users-list">
<h4 class="text-md font-semibold">Online Users</h4>
<ul id="online-user-list" class="list-disc pl-5"></ul>
</div>
<div id="groups-list" class="mt-4">
<h4 class="text-md font-semibold">Groups</h4>
<ul id="related-group-list" class="list-disc pl-5"></ul>
</div>
</div>
<button
onclick="logout()"
class="px-4 py-1 my-4 w-full text-white bg-red-500 rounded"
>
Logout
</button>
</div>
<div
class="flex flex-col flex-grow px-4 pb-[2rem] bg-white rounded shadow-md"
>
<div class="message-box min-h-[300px]" id="messages">
<div id="message-box-placeholder" class="message-box-placeholder">
<p>Chat App for Desktop</p>
<span>Send and receive messages</span>
</div>
</div>
<div class="flex my-4">
<input
id="message"
type="text"
placeholder="Message"
class="w-full p-2 ml-2 border rounded"
/>
<button
onclick="sendMessage()"
class="w-24 px-4 py-2 ml-2 text-white bg-green-500 rounded"
>
Send
</button>
</div>
<div class="mt-4">
<h3 class="text-lg font-semibold">Groups</h3>
<input
id="group-name"
type="text"
placeholder="Group Name"
class="w-full p-2 mt-2 border rounded"
/>
<button
onclick="createGroup()"
class="w-full px-4 py-2 mt-2 text-white bg-green-500 rounded"
>
Create Group
</button>
<input
id="group-member"
type="text"
placeholder="Add Member"
class="w-full p-2 mt-2 border rounded"
/>
<button
onclick="addToGroup()"
class="w-full px-4 py-2 mt-2 text-white bg-green-500 rounded"
>
Add to Group
</button>
</div>
</div>
</div>
</div>
<script>
let socket;
let username;
let selectedUserOrGroup;
function initializeWebSocket() {
socket = new WebSocket("ws://localhost:1337");
socket.addEventListener("open", () => {
console.log("WebSocket connection established");
});
socket.addEventListener("message", (event) => {
handleSocketMessage(event.data);
});
socket.addEventListener("close", () => {
console.log("WebSocket connection closed");
});
}
function handleSocketMessage(data) {
const message = JSON.parse(data);
const { type, payload } = message;
switch (type) {
case "registered":
if (payload.success) {
alert("Registration successful. Please login.");
showLoginForm();
} else {
alert("Registration failed: " + payload.message);
}
break;
case "authenticated":
if (payload.success) {
username = payload.userName;
document
.getElementById("chat-container")
.classList.remove("hidden");
} else {
alert("Login failed");
}
break;
case "message":
displayMessage(
payload.from,
payload.text,
payload.to,
payload.date
);
break;
case "groupCreated":
if (payload.success) {
alert(`Group "${payload.groupName}" created successfully.`);
} else {
alert(`Failed to create group "${payload.groupName}".`);
}
break;
case "addedToGroup":
if (payload.success) {
alert(
`User "${payload.member}" added to group "${payload.groupName}".`
);
} else {
alert(`Failed to add user to group "${payload.groupName}".`);
}
break;
case "currentlyUpdatedUsersAndGroups":
populateOnlineUserAndGroupList(payload);
break;
case "conversationHistory":
conversationHistory(payload);
break;
case "logout":
alert(`${payload.message}`);
break;
case "error":
if (!username) return;
alert(`Error: ${payload.message}`);
break;
default:
console.warn(`Unknown message type: ${type}`);
}
}
function register() {
const userName = document.getElementById("register-username").value;
const password = document.getElementById("register-password").value;
if (userName && password) {
socket.send(
JSON.stringify({
type: "register",
payload: { userName, password },
})
);
} else {
alert("Username or Password cannot be empty !");
}
}
function login() {
const userName = document.getElementById("login-username").value;
const password = document.getElementById("login-password").value;
if (userName && password) {
socket.send(
JSON.stringify({
type: "authenticate",
payload: { userName, password },
})
);
document.getElementById("login-form").classList.add("hidden");
} else {
alert("Username or Password cannot be empty !");
}
}
function sendMessage() {
const to = selectedUserOrGroup;
const messageEl = document.getElementById("message");
const text = messageEl.value;
const date = new Date();
socket.send(
JSON.stringify({ type: "message", payload: { to, text, date } })
);
messageEl.value = "";
}
function createGroup() {
const groupName = document.getElementById("group-name").value;
socket.send(
JSON.stringify({ type: "createGroup", payload: { groupName } })
);
}
function addToGroup() {
const groupName = document.getElementById("group-name").value;
const member = document.getElementById("group-member").value;
socket.send(
JSON.stringify({ type: "addToGroup", payload: { groupName, member } })
);
}
function formatTime(dateString) {
const date = new Date(dateString);
let hours = date.getHours();
const minutes = date.getMinutes();
const ampm = hours >= 12 ? "PM" : "AM";
hours = hours % 12;
hours = hours ? hours : 12;
const formattedMinutes = minutes < 10 ? "0" + minutes : minutes;
return `${hours}:${formattedMinutes} ${ampm}`;
}
function displayMessage(from, text, to, date) {
if (selectedUserOrGroup === to || selectedUserOrGroup === from) {
const messageBox = document.getElementById("messages");
const innerFlexBox = document.createElement("div");
const dateFlexBox = document.createElement("div");
messageBox.appendChild(innerFlexBox);
innerFlexBox.style.display = "flex";
innerFlexBox.style.justifyContent =
from === username ? "end" : "start";
const messageDiv = document.createElement("div");
messageDiv.className = `message ${from === username ? "from" : "to"}`;
messageDiv.textContent = text;
dateFlexBox.style.display = "flex";
dateFlexBox.style.justifyContent = "end";
dateFlexBox.style.fontSize = "11px";
dateFlexBox.style.color = "#808080";
dateFlexBox.textContent = formatTime(date);
innerFlexBox.appendChild(messageDiv);
messageDiv.appendChild(dateFlexBox);
}
}
function fetchConversation(recipient, payload) {
selectedUserOrGroup = recipient;
socket.send(
JSON.stringify({ type: "getConversation", payload: { recipient } })
);
populateOnlineUserAndGroupList(payload);
}
function populateOnlineUserAndGroupList(payload) {
const userListEl = document.getElementById("online-user-list");
while (userListEl.lastElementChild) {
userListEl.removeChild(userListEl.lastElementChild);
}
payload.users
.filter((user) => user !== username)
.map((user) => {
const userItem = document.createElement("li");
userItem.textContent = user;
userItem.className = "clickable";
userItem.onclick = () => {
document
?.getElementById("message-box-placeholder")
?.classList.add("hidden");
fetchConversation(user, payload);
};
if (userItem.textContent === selectedUserOrGroup) {
userItem.style.backgroundColor = "#ffffff";
userItem.style.color = "#000000";
}
userListEl.appendChild(userItem);
});
const groupListEl = document.getElementById("related-group-list");
while (groupListEl.lastElementChild) {
groupListEl.removeChild(groupListEl.lastElementChild);
}
if (payload.groups) {
payload.groups.map((groupName) => {
const groupItem = document.createElement("li");
groupItem.textContent = groupName;
groupItem.className = "clickable";
groupItem.onclick = () => fetchConversation(groupName, payload);
if (groupItem.textContent === selectedUserOrGroup) {
groupItem.style.backgroundColor = "#ffffff";
groupItem.style.color = "#000000";
}
groupListEl.appendChild(groupItem);
});
}
}
function conversationHistory(payload) {
const messageBox = document.getElementById("messages");
while (messageBox.lastElementChild) {
messageBox.removeChild(messageBox.lastElementChild);
}
if (payload.length > 0) {
payload.map((message) => {
displayMessage(
message.sender,
message.message,
message.to,
message.date
);
});
}
}
function showLoginForm() {
document.getElementById("register-username").value = "";
document.getElementById("register-password").value = "";
document.getElementById("register-form").classList.add("hidden");
document.getElementById("login-form").classList.remove("hidden");
}
function showRegisterForm() {
document.getElementById("login-form").classList.add("hidden");
document.getElementById("register-form").classList.remove("hidden");
}
function logout() {
document.getElementById("chat-container").classList.add("hidden");
username = null;
showRegisterForm();
socket.send(JSON.stringify({ type: "close", payload: { username } }));
}
// Initialize WebSocket connection on page load
window.onload = initializeWebSocket;
</script>
</body>
</html>