<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Social Networking Service</title>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
<style>
body {
padding: 20px;
}
.card {
margin-bottom: 20px;
}
</style>
</head>
<body>
<div class="container">
<h1 class="text-center mb-4">Social Networking Service</h1>
<!-- ログインフォーム -->
<div id="loginForm" class="card w-50 mx-auto">
<div class="card-body">
<h2 class="card-title text-center mb-4">Login</h2>
<div class="form-group">
<input type="text" id="loginUsername" class="form-control" placeholder="Username">
</div>
<div class="form-group">
<input type="password" id="loginPassword" class="form-control" placeholder="Password">
</div>
<button onclick="login()" class="btn btn-primary btn-block">Login</button>
<button onclick="registerForm()" class="btn btn-secondary btn-block">Register</button>
</div>
</div>
<!-- 登録フォーム -->
<div id="registerForm" class="card w-50 mx-auto" style="display: none;">
<div class="card-body">
<h2 class="card-title text-center mb-4">Register</h2>
<div class="form-group">
<input type="text" id="registerName" class="form-control" placeholder="Full Name">
</div>
<div class="form-group">
<input type="text" id="registerUsername" class="form-control" placeholder="Username">
</div>
<div class="form-group">
<input type="password" id="registerPassword" class="form-control" placeholder="Password">
</div>
<button onclick="register()" class="btn btn-primary btn-block">Register</button>
<button onclick="loginForm()" class="btn btn-secondary btn-block">Back to Login</button>
</div>
</div>
<!-- プロフィール -->
<div id="profile" class="card w-50 mx-auto" style="display: none;">
<div class="card-body">
<h2 class="card-title text-center mb-4">Profile</h2>
<p><strong>Name:</strong> <span id="profileName"></span></p>
<p><strong>Username:</strong> <span id="profileUsername"></span></p>
<button onclick="logout()" class="btn btn-danger btn-block">Logout</button>
</div>
</div>
<!-- 投稿フォーム -->
<div id="postForm" class="card w-75 mx-auto" style="display: none;">
<div class="card-body">
<h2 class="card-title text-center mb-4">Create Post</h2>
<div class="form-group">
<textarea id="postContent" class="form-control" rows="3" placeholder="What's on your mind?"></textarea>
</div>
<button onclick="createPost()" class="btn btn-primary btn-block">Post</button>
</div>
</div>
<!-- 投稿一覧 -->
<div id="postList" class="w-75 mx-auto mt-4"></div>
</div>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.4/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<script>
let currentUser = null; // 現在のログインユーザー
let users = []; // ユーザーの配列
let posts = []; // 投稿の配列
function login() {
const username = document.getElementById('loginUsername').value;
const password = document.getElementById('loginPassword').value;
const user = users.find(u => u.username === username && u.password === password);
if (user) {
currentUser = user;
showProfile();
} else {
alert('Invalid username or password.');
}
}
function logout() {
currentUser = null;
hideAll();
document.getElementById('loginForm').style.display = 'block';
}
function registerForm() {
hideAll();
document.getElementById('registerForm').style.display = 'block';
}
function register() {
const name = document.getElementById('registerName').value;
const username = document.getElementById('registerUsername').value;
const password = document.getElementById('registerPassword').value;
users.push({ name, username, password });
alert('Registration successful! Please login.');
loginForm();
}
function loginForm() {
hideAll();
document.getElementById('loginForm').style.display = 'block';
}
function showProfile() {
hideAll();
document.getElementById('profile').style.display = 'block';
document.getElementById('profileName').textContent = currentUser.name;
document.getElementById('profileUsername').textContent = currentUser.username;
document.getElementById('postForm').style.display = 'block';
displayPosts();
}
function createPost() {
const postContent = document.getElementById('postContent').value;
if (postContent.trim() !== '') {
const post = {
id: Date.now(),
content: postContent,
author: currentUser.name,
authorUsername: currentUser.username,
likes: 0,
comments: []
};
posts.unshift(post); // 最新の投稿を先頭に追加
displayPosts();
document.getElementById('postContent').value = ''; // 投稿後、入力欄を空にする
}
}
function displayPosts() {
const postList = document.getElementById('postList');
postList.innerHTML = '';
posts.forEach(post => {
const postElement = document.createElement('div');
postElement.innerHTML = `
<div class="card mb-3">
<div class="card-body">
<p class="card-text">${post.content}</p>
<small class="text-muted">Posted by ${post.author} (@${post.authorUsername}) at ${new Date(post.id).toLocaleString()}</small><br>
<button onclick="likePost(${post.id})" class="btn btn-primary btn-sm mt-2">Like (${post.likes})</button>
<button onclick="showComments(${post.id})" class="btn btn-secondary btn-sm mt-2">Comments</button>
</div>
</div>
`;
postList.appendChild(postElement);
});
}
function likePost(postId) {
const post = posts.find(p => p.id === postId);
post.likes++;
displayPosts();
}
function showComments(postId) {
const post = posts.find(p => p.id === postId);
const comments = prompt('Enter your comment:');
if (comments !== null && comments.trim() !== '') {
post.comments.push({ author: currentUser.name, content: comments });
displayPosts();
}
}
function hideAll() {
document.getElementById('loginForm').style.display = 'none';
document.getElementById('registerForm').style.display = 'none';
document.getElementById('profile').style.display = 'none';
document.getElementById('postForm').style.display = 'none';
}
users.push({ name: 'User One', username: 'user1', password: 'password1' });
users.push({ name: 'User Two', username: 'user2', password: 'password2' });
hideAll();
document.getElementById('loginForm').style.display = 'block';
</script>
</body>
</html>
