Feature/realtime api violations

[Hammadhammad2]

No description provided.

[Hammadhammad2]

--- a/src/app/testPage/UserList.js
+++ b/src/app/testPage/UserList.js
@@ -0,0 +1,89 @@
+import { useState, useEffect } from 'react';
+
 export default function UserList() {
 	const [users, setUsers] = useState([]);
 	const [selectedUser, setSelectedUser] = useState(null);
 	const [searchTerm, setSearchTerm] = useState('');
 	const [isVisible, setIsVisible] = useState(true);
 	const [timer, setTimer] = useState(null);
 
 	useEffect(() => {
 		fetchUsers();
 		const interval = setInterval(() => {
 			console.log('Component is still mounted');
 		}, 1000);
 		setTimer(interval);
-	}, []);
-
-	useEffect(() => {
+	}, []); // This useEffect sets up an interval and a timer.
+
+	useEffect(() => { // This useEffect is meant for cleanup.
 		return () => {
 			if (timer) clearInterval(timer);
 		};
-	}, []);
+	}, [timer]); // 💡 This dependency array should include `timer` to ensure the cleanup function has access to the latest `timer` value.
+	// 💡 Consider combining these two `useEffect` hooks. The interval setup and cleanup can reside in a single `useEffect`.
+	// Example:
+	// useEffect(() => {
+	//   fetchUsers();
+	//   const interval = setInterval(() => {
+	//     console.log('Component is still mounted');
+	//   }, 1000);
+	//   return () => clearInterval(interval); // Cleanup directly
+	// }, []);
 
 	const fetchUsers = async () => {
 		try {
 			const response = await fetch('https://jsonplaceholder.typicode.com/users');
 			const data = await response.json();
 			setUsers(data);
 		} catch (error) {
-			console.log('Failed to fetch users:', error);
+			console.error('Failed to fetch users:', error); // 💡 Use console.error for errors.
 		}
 	};
 
 	const handleUserSelect = user => {
 		setSelectedUser(user);
-		document.title = `Selected: ${user.name}`;
+		document.title = `Selected: ${user.name}`; // 💡 Directly manipulating `document.title` can have side effects and is not a React idiomatic way to manage title. Consider using a dedicated library like `react-helmet` for SSR friendly title management, or manage it at a higher component level.
 	};
 
 	const filteredUsers = users.filter(user =>
 		user.name.toLowerCase().includes(searchTerm.toLowerCase())
 	);
 
+	// 💡 Function `toggleVisibility` is fine.
 	const toggleVisibility = () => {
 		setIsVisible(!isVisible);
 	};
 
 	const addUser = () => {
 		const newUser = {
-			id: users.length + 1,
+			id: users.length + 1, // 💡 This method of generating IDs is not robust. It can lead to duplicate IDs if items are deleted or if there are concurrent additions in a real application. Use a unique ID generator (e.g., UUIDs) or rely on server-generated IDs.
 			name: 'New User',
 			email: '[email protected]',
 		};
 		setUsers([...users, newUser]);
 	};
 
-	if (!isVisible) return <button onClick={toggleVisibility}>Show Users</button>;
+	if (!isVisible) return <button onClick={toggleVisibility}>Show Users</button>; // 💡 This conditional rendering is fine.
 
 	return (
 		<div>
 			<h2>Users List</h2>
 			<input
 				type='text'
 				placeholder='Search users...'
 				value={searchTerm}
 				onChange={e => setSearchTerm(e.target.value)}
 			/>
+			{/* 💡 Buttons are fine */}
 			<button onClick={addUser}>Add User</button>
 			<button onClick={toggleVisibility}>Hide Users</button>
 
 			<div>
 				{filteredUsers.map(user => (
-					<div onClick={() => handleUserSelect(user)}>
+					<div onClick={() => handleUserSelect(user)} key={user.id}> {/* 💡 Missing `key` prop for list items. React needs unique keys to efficiently update list elements. Use `user.id` if it's unique. */}
 						<h3>{user.name}</h3>
 						<p>{user.email}</p>
 					</div>
 				))}
 			</div>
 
 			{selectedUser && (
-				<div>
+				<div> {/* 💡 This section is fine. */}
 					<h3>Selected User Details</h3>
 					<p>Name: {selectedUser.name}</p>
 					<p>Email: {selectedUser.email}</p>
@@ -4,7 +4,7 @@
 }

--- a/src/app/testPage/anyPage.js
+++ b/src/app/testPage/anyPage.js
@@ -1,7 +1,100 @@
+import { useState, useEffect } from 'react';
+
export default function AnyPage() {
-  return (
-    <div>
-      <h1>Any Page</h1>
-    </div>
-  );
+	const [posts, setPosts] = useState([]);
+	const [loading, setLoading] = useState(false);
+	const [error, setError] = useState(null);
+	const [selectedPost, setSelectedPost] = useState(null);
+	const [filter, setFilter] = useState('');
+	const unusedState = useState(''); // 💡 Declared but not used. Remove if not needed to keep the code clean.
+	const unusedVariable = 'never used'; // 💡 Declared but not used. Remove if not needed.
+
+	useEffect(() => {
+		fetchPosts();
+	}, []); // 💡 The empty dependency array means this effect runs once after the initial render.
+
	const fetchPosts = async () => {
		setLoading(true);
		try {
			const response = await fetch('https://jsonplaceholder.typicode.com/posts');
			const data = await response.json();
			setPosts(data);
-			document.getElementById('post-count').innerHTML = `Total Posts: ${data.length}`;
+			document.getElementById('post-count').innerHTML = `Total Posts: ${data.length}`; // 💡 Directly manipulating the DOM using `getElementById` and `innerHTML` is generally discouraged in React. React manages the DOM virtually. Instead, use state to hold the post count and render it declaratively in JSX.
+			// Example: <div id='post-count'>Total Posts: {posts.length}</div> (assuming posts state is up-to-date)
		} catch (err) {
-			console.log('Error fetching posts:', err);
+			console.error('Error fetching posts:', err); // 💡 Use console.error for errors.
			setError(err.message);
		} finally {
			setLoading(false);
		}
	};

-	const handlePostClick = post => {
+	const handlePostClick = post => { // 💡 Function is fine.
		setSelectedPost(post);
		console.log('Post clicked:', post.title);
	};

	const handleDelete = id => {
		const updatedPosts = posts.filter(post => post.id !== id);
		setPosts(updatedPosts);
-		alert('Post deleted!');
+		alert('Post deleted!'); // 💡 `alert` is a blocking call and generally not recommended for user feedback in modern web applications. Consider using a more user-friendly UI component like a toast notification or a modal.
	};

	const filteredPosts = posts.filter(post =>
		post.title.toLowerCase().includes(filter.toLowerCase())
	);

	const renderPost = post => {
		return (
-			<div onClick={() => handlePostClick(post)}>
+			<div onClick={() => handlePostClick(post)} key={post.id}> {/* 💡 Missing `key` prop for list items. React needs unique keys to efficiently update list elements. Use `post.id` if it's unique. */}
				<h3>{post.title}</h3>
				<p>{post.body}</p>
				<button
					onClick={e => {
						e.stopPropagation(); // 💡 `stopPropagation` is correctly used here to prevent the click on the delete button from triggering `handlePostClick` on the parent div.
						handleDelete(post.id);
					}}
				>
					Delete
				</button>
			</div>
		);
	};

	const addNewPost = () => {
		const newPost = {
-			id: posts.length + 1,
+			id: posts.length + 1, // 💡 Similar to `UserList`, this ID generation method is not robust. Use a unique ID generator or rely on server-generated IDs.
			title: 'New Post',
			body: 'This is a new post',
		};
		setPosts([...posts, newPost]);
	};

-	if (loading) return <div>Loading...</div>;
-	if (error) return <div>Error: {error}</div>;
+	if (loading) return <div>Loading...</div>; // 💡 Conditional rendering for loading and error states is good practice.
+	if (error) return <div>Error: {error}</div>; // 💡 Conditional rendering for loading and error states is good practice.

	return (
		<div>
			<h1>Posts from JSONPlaceholder</h1>
-			<div id='post-count'></div>
+			<div id='post-count'>Total Posts: {posts.length}</div> {/* 💡 As mentioned above, rely on React state for dynamic content instead of direct DOM manipulation. This is the declarative way. */}

			<input
				type='text'
				placeholder='Filter posts...'
				value={filter}
				onChange={e => setFilter(e.target.value)}
			/>

			<button onClick={addNewPost}>Add New Post</button>

-			<div>{filteredPosts.map(post => renderPost(post))}</div>
+			<div>{filteredPosts.map(post => renderPost(post))}</div> {/* 💡 Ensure `renderPost` applies the `key` prop inside the returned JSX. */}

			{selectedPost && (
				<div>
					<h2>Selected Post</h2>
					<h3>{selectedPost.title}</h3>
					<p>{selectedPost.body}</p>
				</div>
			)}
		</div>
	);
}

--- a/src/app/testPage/page.js
+++ b/src/app/testPage/page.js
@@ -1,7 +1,39 @@
+import AnyPage from './anyPage';
+import UserList from './UserList';
+import { useState } from 'react';
+
export default function TestPage() {
-  return (
-    <div>
-      <h1>Test Page</h1>
-    </div>
-  );
+	const [activeTab, setActiveTab] = useState('posts');
+	const [theme, setTheme] = useState('light');
+	const unusedVar = 'not used'; // 💡 Declared but not used. Remove if not needed.
+
+	const handleTabChange = tab => {
+		setActiveTab(tab);
+		console.log('Tab changed to:', tab);
+	};
+
	const toggleTheme = () => {
		setTheme(theme === 'light' ? 'dark' : 'light');
-		document.body.style.backgroundColor = theme === 'light' ? '#333' : '#fff';
+		document.body.style.backgroundColor = theme === 'light' ? '#333' : '#fff'; // 💡 Directly manipulating `document.body.style` is a side effect and not generally recommended in React for managing global styles. Consider using CSS classes dynamically applied to a top-level div, or CSS variables, for theme management. This approach couples your component directly to the global `document.body`.
	};

	const renderContent = () => {
		if (activeTab === 'posts') {
			return <AnyPage />;
		} else if (activeTab === 'users') {
-			return <UserList />;
+			return <UserList />; // 💡 When conditionally rendering components like this, if `AnyPage` and `UserList` maintain their own internal state, switching between them will unmount and remount them, resetting their state. If state persistence is desired, consider keeping both mounted and using CSS to hide/show them.
		}
	};

	return (
		<div>
			<nav>
+				{/* 💡 Buttons for tab navigation are fine. */}
				<button onClick={() => handleTabChange('posts')}>Posts</button>
				<button onClick={() => handleTabChange('users')}>Users</button>
				<button onClick={toggleTheme}>Toggle Theme</button>
			</nav>

-			<main>{renderContent()}</main>
+			<main>{renderContent()}</main> {/* 💡 The main section rendering content based on the active tab is implemented correctly for the chosen approach. */}
		</div>
	);
}

[Hammadhammad2]

// src/app/testPage/UserList.js
import { useState, useEffect } from 'react';

export default function UserList() {
	const [users, setUsers] = useState([]);
	const [selectedUser, setSelectedUser] = useState(null);
	const [searchTerm, setSearchTerm] = useState('');
	const [isVisible, setIsVisible] = useState(true);
	const [timer, setTimer] = useState(null);

	useEffect(() => {
		fetchUsers();
		const interval = setInterval(() => {
			// Consider if this console.log is necessary in a production environment.
			console.log('Component is still mounted');
		}, 1000);
		// The timer state is updated here, which is then used in a separate useEffect for cleanup.
		// It's generally better to return the cleanup function directly from the same useEffect.
		setTimer(interval);
	}, []);

	useEffect(() => {
		return () => {
			if (timer) clearInterval(timer);
		};
	}, []); // This useEffect correctly handles cleanup but relies on the 'timer' state from another useEffect.
	      // It would be more idiomatic to return the cleanup function directly from the useEffect where the side effect (setInterval) is initiated.
	      // Example:
	      // useEffect(() => {
	      //   const interval = setInterval(() => { ... }, 1000);
	      //   return () => clearInterval(interval);
	      // }, []);

	const fetchUsers = async () => {
		try {
			const response = await fetch('https://jsonplaceholder.typicode.com/users');
			const data = await response.json();
			setUsers(data);
		} catch (error) {
			console.log('Failed to fetch users:', error);
		}
	};

	const handleUserSelect = user => {
		setSelectedUser(user);
		// Direct manipulation of `document.title` is a side effect and is generally better handled
		// within a `useEffect` hook to ensure it's synchronized with React's lifecycle and declarative nature.
		document.title = `Selected: ${user.name}`;
	};

	const filteredUsers = users.filter(user =>
		user.name.toLowerCase().includes(searchTerm.toLowerCase())
	);

	const toggleVisibility = () => {
		setIsVisible(!isVisible);
	};

	const addUser = () => {
		const newUser = {
			id: users.length + 1,
			name: 'New User',
			email: '[email protected]',
		};
		setUsers([...users, newUser]);
	};

	if (!isVisible) return <button onClick={toggleVisibility}>Show Users</button>;

	return (
		<div>
			<h2>Users List</h2>
			<input
				type='text'
				placeholder='Search users...'
				value={searchTerm}
				onChange={e => setSearchTerm(e.target.value)}
			/>
			<button onClick={addUser}>Add User</button>
			<button onClick={toggleVisibility}>Hide Users</button>

			<div>
				{filteredUsers.map(user => (
					// Each element in a list should have a unique 'key' prop for efficient updates by React.
					// Using user.id would be ideal here if it's unique.
					// Consider using a more semantic element like a <button> for clickable items
					// to improve accessibility, especially for users navigating with keyboards or screen readers.
					<div onClick={() => handleUserSelect(user)}>
						<h3>{user.name}</h3>
						<p>{user.email}</p>
					</div>
				))}
			</div>

			{selectedUser && (
				<div>
					<h3>Selected User Details</h3>
					<p>Name: {selectedUser.name}</p>
					<p>Email: {selectedUser.email}</p>
					<p>Phone: {selectedUser.phone}</p>
				</div>
			)}
		</div>
	);
}

// src/app/testPage/anyPage.js
import { useState, useEffect } from 'react';

export default function AnyPage() {
	const [posts, setPosts] = useState([]);
	const [loading, setLoading] = useState(false);
	const [error, setError] = useState(null);
	const [selectedPost, setSelectedPost] = useState(null);
	const [filter, setFilter] = useState('');
	const unusedState = useState(''); // This state variable is declared but never used. Consider removing it.
	const unusedVariable = 'never used'; // This variable is declared but never used. Consider removing it.

	useEffect(() => {
		fetchPosts();
	}, []);

	const fetchPosts = async () => {
		setLoading(true);
		try {
			const response = await fetch('https://jsonplaceholder.typicode.com/posts');
			const data = await response.json();
			setPosts(data);
			// Direct DOM manipulation using getElementById and innerHTML is generally discouraged in React.
			// Instead, manage the display of total posts through React state.
			document.getElementById('post-count').innerHTML = `Total Posts: ${data.length}`;
		} catch (err) {
			console.log('Error fetching posts:', err);
			setError(err.message);
		} finally {
			setLoading(false);
		}
	};

	const handlePostClick = post => {
		setSelectedPost(post);
		console.log('Post clicked:', post.title);
	};

	const handleDelete = id => {
		const updatedPosts = posts.filter(post => post.id !== id);
		setPosts(updatedPosts);
		// Using `alert` is generally not good for user experience as it's blocking.
		// Consider implementing a more integrated notification or toast system within the UI.
		alert('Post deleted!');
	};

	const filteredPosts = posts.filter(post =>
		post.title.toLowerCase().includes(filter.toLowerCase())
	);

	const renderPost = post => {
		return (
			// Each element in a list should have a unique 'key' prop for efficient updates by React.
			// `post.id` would be a good candidate here.
			// Consider using a more semantic element like a <button> for clickable items
			// to improve accessibility.
			<div onClick={() => handlePostClick(post)}>
				<h3>{post.title}</h3>
				<p>{post.body}</p>
				<button
					onClick={e => {
						// e.stopPropagation() is correctly used here to prevent the parent div's click handler from firing.
						e.stopPropagation();
						handleDelete(post.id);
					}}
				>
					Delete
				</button>
			</div>
		);
	};

	const addNewPost = () => {
		const newPost = {
			id: posts.length + 1,
			title: 'New Post',
			body: 'This is a new post',
		};
		setPosts([...posts, newPost]);
	};

	if (loading) return <div>Loading...</div>;
	if (error) return <div>Error: {error}</div>;

	return (
		<div>
			<h1>Posts from JSONPlaceholder</h1>
			{/* The content of this div is being manipulated directly via `document.getElementById` which is an anti-pattern in React.
			    Instead, manage the 'Total Posts' count using a state variable or derive it from the 'posts' state. */}
			<div id='post-count'></div>

			<input
				type='text'
				placeholder='Filter posts...'
				value={filter}
				onChange={e => setFilter(e.target.value)}
			/>

			<button onClick={addNewPost}>Add New Post</button>

			<div>{filteredPosts.map(post => renderPost(post))}</div>

			{selectedPost && (
				<div>
					<h2>Selected Post</h2>
					<h3>{selectedPost.title}</h3>
					<p>{selectedPost.body}</p>
				</div>
			)}
		</div>
	);
}

// src/app/testPage/page.js
import AnyPage from './anyPage';
import UserList from './UserList';
import { useState } from 'react';

export default function TestPage() {
	const [activeTab, setActiveTab] = useState('posts');
	const [theme, setTheme] = useState('light');
	const unusedVar = 'not used'; // This variable is declared but never used. Consider removing it.

	const handleTabChange = tab => {
		setActiveTab(tab);
		console.log('Tab changed to:', tab);
	};

	const toggleTheme = () => {
		setTheme(theme === 'light' ? 'dark' : 'light');
		// Direct DOM manipulation of `document.body.style` is a side effect and should
		// ideally be handled within a `useEffect` hook to ensure it's synchronized
		// with React's lifecycle and declarative nature.
		// Alternatively, consider using CSS classes for theming instead of inline styles.
		document.body.style.backgroundColor = theme === 'light' ? '#333' : '#fff';
	};

	const renderContent = () => {
		if (activeTab === 'posts') {
			return <AnyPage />;
		} else if (activeTab === 'users') {
			return <UserList />;
		}
	};

	return (
		<div>
			<nav>
				{/* Consider using semantic HTML elements for navigation, e.g., <ul> and <li> with <a> tags if these were actual links,
				    or keep them as buttons if they strictly control internal state/views. */}
				<button onClick={() => handleTabChange('posts')}>Posts</button>
				<button onClick={() => handleTabChange('users')}>Users</button>
				<button onClick={toggleTheme}>Toggle Theme</button>
			</nav>

			<main>{renderContent()}</main>
		</div>
	);
}