import jwt
import datetime
from flask import Flask, request

app = Flask(__name__)

# Data structure to store user information
users = {
    1: {
        'id': 1,
        'username': 'user1',
        'email': '[email protected]',
        'password': 'secret1'
    },
    2: {
        'id': 2,
        'username': 'user2',
        'email': '[email protected]',
        'password': 'secret2'
    }
}

# Function to handle user signup
@app.route('/signup', methods=['POST'])
def signup():
    # Extract user information from the request
    data = request.get_json()
    username = data['username']
    email = data['email']
    password = data['password']

    # Generate a new user id
    user_id = max(users.keys()) + 1

    # Store the new user information
    users[user_id] = {
        'id': user_id,
        'username': username,
        'email': email,
        'password': password
    }

    # Return success message
    return {'message': 'User created successfully'}

# Function to handle user login
@app.route('/login', methods=['POST'])
def login():
    # Extract user information from the request
    data = request.get_json()
    email = data['email']
    password = data['password']

    # Search for the user in the data store
    user = None
    for user_id, user_data in users.items():
        if user_data['email'] == email and user_data['password'] == password:
            user = user_data
            break

    # If the user is not found, return an error
    if not user:
        return {'error': 'Invalid email or password'}, 401

    # Generate a JWT token
    payload = {
        'sub': user['id'],
        'iat': datetime.datetime.utcnow(),
        'exp': datetime.datetime.utcnow() + datetime.timedelta(days=7)
    }
    token = jwt.encode(payload, 'secret', algorithm='HS256')

    # Return the JWT token
    return {'token': token.decode('utf-8')}

if __name__ == '__main__':
    app.run(debug=True)

class NewsfeedService:
    def __init__(self):
        self.newsfeeds = {}
    
    def create_newsfeed(self, user_id, newsfeed):
        if user_id not in self.newsfeeds:
            self.newsfeeds[user_id] = []
        self.newsfeeds[user_id].append(newsfeed)
    
    def get_newsfeeds(self, user_id):
        return self.newsfeeds.get(user_id, [])
    
    def update_newsfeed(self, user_id, newsfeed_id, newsfeed):
        if user_id in self.newsfeeds:
            for i, nf in enumerate(self.newsfeeds[user_id]):
                if nf["id"] == newsfeed_id:
                    self.newsfeeds[user_id][i] = newsfeed
                    break

class NotificationService:
    def __init__(self):
        self.notifications = {}
    
    def create_notification(self, user_id, notification):
        if user_id not in self.notifications:
            self.notifications[user_id] = []
        self.notifications[user_id].append(notification)
    
    def get_notifications(self, user_id):
        return self.notifications.get(user_id, [])
    
    def update_notification(self, user_id, notification_id, notification):
        if user_id in self.notifications:
            for i, nf in enumerate(self.notifications[user_id]):
                if nf["id"] == notification_id:
                    self.notifications[user_id][i] = notification
                    break

class AnalyticsService:
    def __init__(self):
        self.metrics = {}
    
    def store_metric(self, metric_name, value):
        self.metrics[metric_name] = value
    
    def process_metrics(self):
        # Do some processing on the stored metrics to generate insights
        pass
    
    def get_metric(self, metric_name):
        return self.metrics.get(metric_name, None)

from datetime import datetime

class Post:
    def __init__(self, title, content, author_id, created_at=None):
        self.title = title
        self.content = content
        self.author_id = author_id
        self.created_at = created_at or datetime.now()

class PostService:
    def __init__(self):
        self.posts = []
    
    def create_post(self, title, content, author_id):
        post = Post(title, content, author_id)
        self.posts.append(post)
        return post
    
    def get_posts(self):
        return self.posts
    
    def update_post(self, post_id, title=None, content=None):
        for index, post in enumerate(self.posts):
            if post.id == post_id:
                if title:
                    post.title = title
                if content:
                    post.content = content
                self.posts[index] = post
                return post
        return None
    
    def delete_post(self, post_id):
        for index, post in enumerate(self.posts):
            if post.id == post_id:
                del self.posts[index]
                return True
        return False

import java.util.*;

class User {
    private String username;
    private String password;
    private List<Post> posts;
    private List<User> friends;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
        this.posts = new ArrayList<>();
        this.friends = new ArrayList<>();
    }

    // Getters and setters
    // ...

    public void addPost(Post post) {
        posts.add(post);
    }

    public void addFriend(User friend) {
        friends.add(friend);
    }
}

class Post {
    private String postId;
    private String content;
    private User author;

    public Post(String postId, String content, User author) {
        this.postId = postId;
        this.content = content;
        this.author = author;
    }

    // Getters and setters
    // ...
}

class FacebookSystem {
    private List<User> users;

    public FacebookSystem() {
        this.users = new ArrayList<>();
    }

    public void registerUser(String username, String password) {
        User newUser = new User(username, password);
        users.add(newUser);
        System.out.println("User registered successfully.");
    }

    public void addFriend(String username, String friendUsername) {
        User user = findUserByUsername(username);
        User friend = findUserByUsername(friendUsername);
        if (user != null && friend != null) {
            user.addFriend(friend);
            friend.addFriend(user);
            System.out.println("Friend added successfully.");
        } else {
            System.out.println("User or friend not found.");
        }
    }

    public void createPost(String username, String postId, String content) {
        User author = findUserByUsername(username);
        if (author != null) {
            Post newPost = new Post(postId, content, author);
            author.addPost(newPost);
            System.out.println("Post created successfully.");
        } else {
            System.out.println("User not found.");
        }
    }

    public List<Post> getNewsFeed(String username) {
        User user = findUserByUsername(username);
        List<Post> newsFeed = new ArrayList<>();
        if (user != null) {
            List<User> friends = user.getFriends();
            for (User friend : friends) {
                newsFeed.addAll(friend.getPosts());
            }
            Collections.sort(newsFeed, (p1, p2) -> p2.getPostId().compareTo(p1.getPostId()));
        }
        return newsFeed;
    }

    public User findUserByUsername(String username) {
        for (User user : users) {
            if (user.getUsername().equals(username)) {
                return user;
            }
        }
        return null;
    }
}

public class FacebookApp {
    public static void main(String[] args) {
        FacebookSystem facebook = new FacebookSystem();

        // Register users
        facebook.registerUser("user1", "password1");
        facebook.registerUser("user2", "password2");

        // Add friends
        facebook.addFriend("user1", "user2");

        // Create posts
        facebook.createPost("user1", "post1", "Hello, everyone!");
        facebook.createPost("user2", "post2", "Happy weekend!");

        // Get news feed
        List<Post> newsFeed = facebook.getNewsFeed("user1");

        // Display news feed
        for (Post post : newsFeed) {
            System.out.println("Post ID: " + post.getPostId());
            System.out.println("Content: " + post.getContent());
            System.out.println("Author: " + post.getAuthor().getUsername());
            System.out.println();
        }
    }
}

from flask import Flask, jsonify, request

app = Flask(__name__)

# Endpoint for getting user information
@app.route('/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    # Code to get user information using user_id
    user = {'name': 'John Doe', 'location': 'New York', 'age': 35}
    return jsonify(user)

# Endpoint for getting a user's newsfeed
@app.route('/newsfeed/<int:user_id>', methods=['GET'])
def get_newsfeed(user_id):
    # Code to get user's newsfeed using user_id
    newsfeed = [{'id': 1, 'message': 'Check out my new blog post!'},
                {'id': 2, 'message': 'Just finished a great workout!'}]
    return jsonify(newsfeed)

# Endpoint for posting to a user's newsfeed
@app.route('/newsfeed/<int:user_id>', methods=['POST'])
def post_to_newsfeed(user_id):
    # Code to add a post to user's newsfeed using user_id and message in request body
    message = request.json['message']
    post_id = 3  # Generate a unique post ID
    return jsonify({'message': f'Post added to newsfeed with ID {post_id}!'})

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request

app = Flask(__name__)

# A dummy data store to store news feed data
news_feed_data = [
    {
        "id": 1,
        "author": "John Doe",
        "content": "Hello, World!"
    },
    {
        "id": 2,
        "author": "Jane Doe",
        "content": "Hi there!"
    }
]

# Endpoint to retrieve all news feed data
@app.route("/newsfeed", methods=["GET"])
def get_news_feed():
    # Return the entire news feed data store
    return {"news_feed": news_feed_data}

# Endpoint to add a new post to the news feed
@app.route("/newsfeed", methods=["POST"])
def add_post():
    # Get the data from the request body
    data = request.get_json()

    # Add the new post to the news feed data store
    news_feed_data.append(data)

    # Return a success message
    return {"message": "Post added successfully"}

if __name__ == "__main__":
    app.run(debug=True)

class PostsService:
    def __init__(self):
        self.posts = {}

    def add_post(self, post_id, post_content):
        self.posts[post_id] = post_content

    def get_post(self, post_id):
        return self.posts.get(post_id)

class FeedService:
    def __init__(self, posts_service):
        self.posts_service = posts_service
        self.feed = []

    def add_to_feed(self, post_id):
        post = self.posts_service.get_post(post_id)
        if post:
            self.feed.append(post)

    def get_feed(self):
        return self.feed

# Example usage
posts_service = PostsService()
posts_service.add_post(1, "Hello World!")
posts_service.add_post(2, "How are you?")

feed_service = FeedService(posts_service)
feed_service.add_to_feed(1)
feed_service.add_to_feed(2)

print(feed_service.get_feed())
# Output: ["Hello World!", "How are you?"]

# Create a status update
status = 'Hello, World!'
graph.put_object(parent_object='me', connection_name='feed', message=status)

# Retrieve user's home feed
feed = graph.get_connections('me', 'home')

# Print the posts
for post in feed['data']:
    print(post['message'])

import tkinter as tk

# Create a window
window = tk.Tk()

# Retrieve user's home feed
feed = graph.get_connections('me', 'home')

# Display the posts in a listbox
listbox = tk.Listbox(window)
for post in feed['data']:
    listbox.insert(tk.END, post['message'])
listbox.pack()

# Run the window
window.mainloop()

# Retrieve user's friend list
friends = graph.get_connections('me', 'friends')

# Retrieve friend's posts
for friend in friends['data']:
    friend_id = friend['id']
    friend_name = friend['name']
    friend_posts = graph.get_connections(friend_id, 'posts')
    
    # Print the posts
    for post in friend_posts['data']:
        print(friend_name + ': ' + post['message'])

import tkinter as tk

# Create a window
window = tk.Tk()

# Retrieve user's friend list
friends = graph.get_connections('me', 'friends')

# Retrieve friend's posts
posts = []
for friend in friends['data']:
    friend_id = friend['id']
    friend_name = friend['name']
    friend_posts = graph.get_connections(friend_id, 'posts')
    
    # Add the posts to the list
    for post in friend_posts['data']:
        posts.append(friend_name + ': ' + post['message'])

# Display the posts in a listbox
listbox = tk.Listbox(window)
for post in posts:
    listbox.insert(tk.END, post)
listbox.pack()

# Run the window
window.mainloop()

class User:
    def __init__(self, user_id, name):
        self.user_id = user_id
        self.name = name
        self.posts = []
        self.activities = []

class Post:
    def __init__(self, post_id, content, user_id):
        self.post_id = post_id
        self.content = content
        self.user_id = user_id
        self.timestamp = datetime.datetime.now()

class Activity:
    def __init__(self, activity_id, description, user_id):
        self.activity_id = activity_id
        self.description = description
        self.user_id = user_id
        self.timestamp = datetime.datetime.now()

def rank_posts(user, posts):
    ranked_posts = []
    
    for post in posts:
        # Apply ranking algorithm (e.g., machine learning model) based on user preferences and post features
        rank_score = rank_algorithm(user, post)
        ranked_posts.append((post, rank_score))
    
    # Sort posts based on rank score in descending order
    ranked_posts.sort(key=lambda x: x[1], reverse=True)
    
    return [post for post, _ in ranked_posts]

import asyncio
import websockets

async def handle_newsfeed_updates(websocket, path):
    while True:
        # Wait for new posts or activities to arrive
        new_data = await get_new_data()
        
        # Send the new data to the connected clients
        await websocket.send(new_data)

start_server = websockets.serve(handle_newsfeed_updates, 'localhost', 8765)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

def aggregate_posts(user):
    aggregated_posts = []
    
    for friend in user.friends:
        friend_posts = friend.posts
        aggregated_posts.extend(friend_posts)
    
    for page in user.liked_pages:
        page_posts = page.posts
        aggregated_posts.extend(page_posts)
    
    # Perform deduplication to remove duplicate posts
    
    # Shuffle the posts for diverse content representation
    
    return aggregated_posts

def filter_posts(user, posts):
    filtered_posts = []
    
    for post in posts:
        if check_privacy_settings(user, post):
            if check_user_defined_rules(user, post):
                filtered_posts.append(post)
    
    return filtered_posts

import redis

cache = redis.Redis(host='localhost', port=6379, db=0)

def get_cached_posts(user_id):
    cached_posts = cache.get(user_id)
    
    if cached_posts:
        return cached_posts
    
    # If posts are not cached, retrieve them from the database or another source
    posts = fetch_posts_from_database(user_id)
    
    # Cache the retrieved posts for future use
    cache.set(user_id, posts)
    
    return posts

def like_post(user, post):
    # Update post's likes count
    post.likes += 1
    
    # Update user's liked posts
    user.liked_posts.append(post.post_id)

def comment_post(user, post, comment):
    # Add comment to post's comments list
    post.comments.append(comment)
    
    # Update user's commented posts
    user.commented_posts.append(post.post_id)

def detect_inappropriate_content(post):
    # Use algorithms or models to detect inappropriate content
    if is_inappropriate(post.content):
        post.mark_as_inappropriate()

def prevent_spam(user, post):
    if is_spam(user, post):
        post.mark_as_spam()

def track_post_engagement(post):
    # Track post reach and engagement metrics
    post.views += 1
    post.likes += get_likes_count(post)
    post.comments += get_comments_count(post)
    post.shares += get_shares_count(post)

def generate_post_report(post):
    report = {
        'post_id': post.post_id,
        'reach': post.views,
        'engagement': post.likes + post.comments + post.shares
    }
    
    return report

def fetch_posts_for_mobile(user):
    # Retrieve optimized data for mobile devices
    mobile_posts = fetch_optimized_posts(user)
    
    # Render posts for mobile display
    rendered_posts = render_posts_for_mobile(mobile_posts)
    
    return rendered_posts

def handle_failure():
    try:
        # Attempt to recover from failure or switch to backup system
        recover_from_failure()
    except Exception as e:
        # Notify system administrators and log the error
        notify_administrators(e)
        log_error(e)

def load_balancing():
    # Implement load balancing strategy to distribute incoming requests
    load_balancer = create_load_balancer()
    load_balancer.route_request()

def monitor_system_health():
    while True:
        # Monitor system metrics (e.g., CPU usage, memory usage)
        cpu_usage = get_cpu_usage()
        memory_usage = get_memory_usage()
        
        # Send alerts if metrics exceed thresholds
        if cpu_usage > 90:
            send_alert('High CPU usage detected')
        if memory_usage

from flask import Flask, request, jsonify
from flask_jwt_extended import JWTManager, jwt_required, create_access_token
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///stock_exchange.db'
app.config['JWT_SECRET_KEY'] = 'your-secret-key'
db = SQLAlchemy(app)
jwt = JWTManager(app)

# Database Models
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50), unique=True, nullable=False)
    password = db.Column(db.String(80), nullable=False)

# Routes
@app.route('/register', methods=['POST'])
def register():
    username = request.json['username']
    password = request.json['password']
    user = User(username=username, password=password)
    db.session.add(user)
    db.session.commit()
    return jsonify(message='User successfully registered'), 201

@app.route('/login', methods=['POST'])
def login():
    username = request.json['username']
    password = request.json['password']
    user = User.query.filter_by(username=username).first()
    if user and user.password == password:
        access_token = create_access_token(identity=user.id)
        return jsonify(access_token=access_token), 200
    return jsonify(message='Invalid username or password'), 401

@app.route('/orders', methods=['POST'])
@jwt_required()
def place_order():
    symbol = request.json['symbol']
    side = request.json['side']
    quantity = request.json['quantity']
    price = request.json['price']
    # Implementation logic for placing an order
    return jsonify(message='Order successfully placed'), 201

@app.route('/orders/<int:order_id>', methods=['GET'])
@jwt_required()
def get_order(order_id):
    # Implementation logic for retrieving order details
    return jsonify(order_details), 200

@app.route('/orders/<int:order_id>', methods=['DELETE'])
@jwt_required()
def cancel_order(order_id):
    # Implementation logic for canceling an order
    return jsonify(message='Order successfully canceled'), 204

@app.route('/account/balance', methods=['GET'])
@jwt_required()
def get_account_balance():
    # Implementation logic for retrieving account balance
    return jsonify(account_balance), 200

if __name__ == '__main__':
    db.create_all()
    app.run()

import java.util.*;

class User {
    private String userId;
    private String username;
    private String password;
    // other user attributes
    
    public User(String userId, String username, String password) {
        this.userId = userId;
        this.username = username;
        this.password = password;
        // initialize other attributes
    }
    
    // Getters and setters for attributes
    // ...
}

class Stock {
    private String stockId;
    private String name;
    private double price;
    // other stock attributes
    
    public Stock(String stockId, String name, double price) {
        this.stockId = stockId;
        this.name = name;
        this.price = price;
        // initialize other attributes
    }
    
    // Getters and setters for attributes
    // ...
}

class Order {
    private String orderId;
    private User user;
    private Stock stock;
    private double quantity;
    private double price;
    private OrderType type;
    // other order attributes
    
    public Order(String orderId, User user, Stock stock, double quantity, double price, OrderType type) {
        this.orderId = orderId;
        this.user = user;
        this.stock = stock;
        this.quantity = quantity;
        this.price = price;
        this.type = type;
        // initialize other attributes
    }
    
    // Getters and setters for attributes
    // ...
}

enum OrderType {
    BUY,
    SELL
}

class StockExchange {
    private Map<String, User> users;
    private Map<String, Stock> stocks;
    private List<Order> orders;
    
    public StockExchange() {
        this.users = new HashMap<>();
        this.stocks = new HashMap<>();
        this.orders = new ArrayList<>();
    }
    
    public void addUser(User user) {
        users.put(user.getUserId(), user);
    }
    
    public User getUserById(String userId) {
        return users.get(userId);
    }
    
    public void addStock(Stock stock) {
        stocks.put(stock.getStockId(), stock);
    }
    
    public Stock getStockById(String stockId) {
        return stocks.get(stockId);
    }
    
    public void placeOrder(String userId, String stockId, double quantity, double price, OrderType type) {
        User user = getUserById(userId);
        Stock stock = getStockById(stockId);
        
        if (user == null || stock == null) {
            System.out.println("User or stock not found");
            return;
        }
        
        String orderId = generateOrderId(); // Generate a unique order ID
        Order order = new Order(orderId, user, stock, quantity, price, type);
        orders.add(order);
        
        // Additional logic to match orders, update stock prices, etc.
        // ...
    }
    
    public List<Order> getUserOrders(String userId) {
        List<Order> userOrders = new ArrayList<>();
        
        for (Order order : orders) {
            if (order.getUser().getUserId().equals(userId)) {
                userOrders.add(order);
            }
        }
        
        return userOrders;
    }
    
    // Additional methods for handling market data, order book, trade history, etc.
    // ...
}

public class Main {
    public static void main(String[] args) {
        StockExchange stockExchange = new StockExchange();
        
        User user1 = new User("1", "Alice", "password");
        User user2 = new User("2", "Bob", "password");
        
        stockExchange.addUser(user1);
        stockExchange.addUser(user2);
        
        Stock stock1 = new Stock("1", "AAPL", 150.0);
        Stock stock2 = new Stock("2", "GOOG", 2500.0);
        
        stockExchange.addStock(stock1);
        stockExchange.addStock(stock2);
        
        // Place orders, retrieve user orders, etc.
        // ...
    }
}

class StockOrder:
    def __init__(self, symbol, price, quantity):
        self.symbol = symbol
        self.price = price
        self.quantity = quantity

class StockExchange:
    def __init__(self):
        self.buy_orders = []
        self.sell_orders = []

    def add_buy_order(self, order):
        self.buy_orders.append(order)
        self.match_orders()

    def add_sell_order(self, order):
        self.sell_orders.append(order)
        self.match_orders()

    def match_orders(self):
        for buy_order in self.buy_orders:
            for sell_order in self.sell_orders:
                if buy_order.price >= sell_order.price:
                    self.execute_trade(buy_order, sell_order)
                    self.buy_orders.remove(buy_order)
                    self.sell_orders.remove(sell_order)

    def execute_trade(self, buy_order, sell_order):
        print(f"Trade executed - Buy: {buy_order.symbol} at {buy_order.price}, Sell: {sell_order.symbol} at {sell_order.price}")

# Example usage
exchange = StockExchange()
order1 = StockOrder("AAPL", 150.50, 10)
order2 = StockOrder("AAPL", 150.25, 5)
order3 = StockOrder("AAPL", 151.00, 8)
order4 = StockOrder("AAPL", 149.75, 12)

exchange.add_buy_order(order1)
exchange.add_sell_order(order2)
exchange.add_sell_order(order3)
exchange.add_buy_order(order4)

import time

class StockExchange:
    def __init__(self):
        self.subscribers = []

    def subscribe(self, subscriber):
        self.subscribers.append(subscriber)

    def unsubscribe(self, subscriber):
        self.subscribers.remove(subscriber)

    def publish_data(self, data):
        for subscriber in self.subscribers:
            subscriber.receive_data(data)

# Example subscriber class
class StockDataSubscriber:
    def receive_data(self, data):
        print(f"Received data: {data} at {time.time()}")

# Example usage
exchange = StockExchange()
subscriber1 = StockDataSubscriber()
subscriber2 = StockDataSubscriber()

exchange.subscribe(subscriber1)
exchange.subscribe(subscriber2)

# Simulate receiving real-time stock data
data = {"symbol": "AAPL", "price": 150.25}
exchange.publish_data(data)

exchange.unsubscribe(subscriber1)

data = {"symbol": "GOOGL", "price": 2500.50}
exchange.publish_data(data)

class Trade:
    def __init__(self, buyer, seller, security, price, quantity):
        self.buyer = buyer
        self.seller = seller
        self.security = security
        self.price = price
        self.quantity = quantity

class TradeSettlement:
    def __init__(self):
        self.pending_trades = []

    def process_trade(self, trade):
        self.pending_trades.append(trade)
        self.settle_trades()

    def settle_trades(self):
        for trade in self.pending_trades:
            print(f"Trade settled - Buyer: {trade.buyer}, Seller: {trade.seller}, Security: {trade.security}, Price: {trade.price}, Quantity: {trade.quantity}")
            # Perform trade settlement process (transfer of securities and funds)

# Example usage
settlement = TradeSettlement()
trade1 = Trade("John", "Alice", "AAPL", 150.25, 10)
trade2 = Trade("Bob", "Carol", "GOOGL", 2500.50, 5)

settlement.process_trade(trade1)
settlement.process_trade(trade2)

class RegulatoryCompliance:
    def __init__(self):
        self.kyc_compliant_customers = []
        self.aml_compliant_customers = []

    def check_kyc_compliance(self, customer):
        return customer in self.kyc_compliant_customers

    def check_aml_compliance(self, customer):
        return customer in self.aml_compliant_customers

    def update_kyc_compliance(self, customer):
        self.kyc_compliant_customers.append(customer)

    def update_aml_compliance(self, customer):
        self.aml_compliant_customers.append(customer)

# Example usage
compliance = RegulatoryCompliance()

compliance.update_kyc_compliance("John")
compliance.update_kyc_compliance("Alice")
compliance.update_aml_compliance("John")

print(compliance.check_kyc_compliance("Alice"))  # True
print(compliance.check_kyc_compliance("Bob"))  # False
print(compliance.check_aml_compliance("John"))  # True
print(compliance.check_aml_compliance("Carol"))  # False

class MarketSurveillance:
    def __init__(self):
        self.trade_data = []

    def monitor_trades(self, trade):
        self.trade_data.append(trade)
        self.detect_suspicious_activities()

    def detect_suspicious_activities(self):
        # Analyze trade data to detect suspicious trading activities
        print("Suspicious activities detected!")

# Example usage
surveillance = MarketSurveillance()

trade1 = Trade("John", "Alice", "AAPL", 150.25, 10)
trade2 = Trade("Bob", "Carol", "GOOGL", 2500.50, 5)

surveillance.monitor_trades(trade1)
surveillance.monitor_trades(trade2)

class ReportingAndAnalytics:
    def generate_reports(self):
        # Generate comprehensive reports based on market data
        print("Generating reports...")
    def perform_analysis(self):
        # Perform data analysis for market trends and decision-making
        print("Performing analysis...")
# Example usage
analytics = ReportingAndAnalytics()
analytics.generate_reports()
analytics.perform_analysis()

import time
import random

TOTAL_USERS = 10000000
DAU = 2000000
TRADES_PER_USER_PER_DAY = 5
TOTAL_TRADES_PER_DAY = DAU * TRADES_PER_USER_PER_DAY
READ_TO_WRITE_RATIO = 100

def simulate_zerodha():
    storage_per_day = TOTAL_TRADES_PER_DAY * 1024  # Assume each trade data is 1 KB in size
    storage_for_three_years = storage_per_day * 365 * 3 / (1024 * 1024)  # Convert to TB

    print(f"Storage Per Day: {storage_per_day / (1024 * 1024):.2f} MB")
    print(f"Storage for Next 3 Years: {storage_for_three_years:.2f} TB")

    requests_per_second = TOTAL_TRADES_PER_DAY / (24 * 3600)
    print(f"Requests Per Second: {requests_per_second:.2f}")

    # Simulating trading activity
    for i in range(1, 4 * 365 + 1):
        trades_today = random.randint(DAU * TRADES_PER_USER_PER_DAY - 5000, DAU * TRADES_PER_USER_PER_DAY + 5000)
        storage_used_today = trades_today * 1024  # Assume each trade data is 1 KB in size
        requests_per_second_today = trades_today / (24 * 3600)

        print(f"\nDay {i}:")
        print(f"Trades Today: {trades_today}")
        print(f"Storage Used Today: {storage_used_today / (1024 * 1024):.2f} MB")
        print(f"Requests Per Second Today: {requests_per_second_today:.2f}")

        time.sleep(0.1)  # Simulate processing time for a day

if __name__ == "__main__":
    simulate_zerodha()

User Management API:

POST /users: This API allows users to create a new account by providing their username, email, and password.
POST /login: This API allows users to log in by providing their username and password.
PATCH /users/{user_id}: This API allows users to update their profile information, such as their bio or profile picture.
GET /users/{user_id}: This API allows users to retrieve their own profile information or view other users' profiles.

Account Management API:

POST /accounts: This API allows users to create a new trading account by providing their user ID and initial balance.
GET /accounts/{account_id}: This API allows users to retrieve their account information, such as the current balance and transaction history.
PATCH /accounts/{account_id}: This API allows users to deposit or withdraw funds from their account.

Trading API:

POST /buy: This API allows users to place a buy order for a specific quantity of a stock at a given price.
POST /sell: This API allows users to place a sell order for a specific quantity of a stock at a given price.
GET /portfolio/{account_id}: This API allows users to view their current stock portfolio, including the stocks they hold and the quantities.

from flask import Flask, request, jsonify

app = Flask(__name__)

# Dummy data for user authentication and profile
users = {
    "your_username": {
        "password": "your_password",
        "email": "your_email",
        "balance": 10000.00
    }
}

# Sample orders data (This is a simplified example; in a real system, this data should be stored in a database)
orders = {}

# User Authentication API
@app.route('/api/login', methods=['POST'])
def login():
    data = request.get_json()
    username = data['username']
    password = data['password']

    if username in users and users[username]['password'] == password:
        return jsonify({"access_token": "your_access_token"}), 200
    else:
        return jsonify({"error": "Invalid credentials"}), 401

# Get User Profile API
@app.route('/api/user/profile', methods=['GET'])
def get_user_profile():
    # Get the user from the access token or other authentication mechanism
    # For simplicity, let's assume the user is already authenticated and stored in the 'current_user' variable.
    current_user = "your_username"

    if current_user in users:
        return jsonify(users[current_user]), 200
    else:
        return jsonify({"error": "User not found"}), 404

# Place Order API
@app.route('/api/order', methods=['POST'])
def place_order():
    # Get the user from the access token or other authentication mechanism
    # For simplicity, let's assume the user is already authenticated and stored in the 'current_user' variable.
    current_user = "your_username"

    data = request.get_json()
    symbol = data['symbol']
    quantity = data['quantity']
    price = data['price']
    side = data['side']

    # Process the order and update the orders data (This is a simplified example)
    order_id = len(orders) + 1
    orders[order_id] = {
        "symbol": symbol,
        "quantity": quantity,
        "price": price,
        "side": side,
        "status": "pending"
    }

    return jsonify({"order_id": order_id, "status": "pending"}), 200

# Get Order Status API
@app.route('/api/order/<int:order_id>', methods=['GET'])
def get_order_status(order_id):
    if order_id in orders:
        return jsonify(orders[order_id]), 200
    else:
        return jsonify({"error": "Order not found"}), 404

if __name__ == '__main__':
    app.run(debug=True)

User Authentication:

Endpoint: /api/login
Method: POST
Description: Handles user authentication and returns an access token for further API calls.
Request Body: { "username": "your_username", "password": "your_password" }
Response: { "access_token": "your_access_token" }

Get User Profile:

Endpoint: /api/user/profile
Method: GET
Description: Retrieves the user's profile information.
Authorization: Bearer Token (Include the access token obtained after login in the Authorization header)
Response: { "username": "your_username", "email": "your_email", "balance": "your_account_balance" }

Place Order:

Endpoint: /api/order
Method: POST
Description: Allows users to place buy or sell orders.
Authorization: Bearer Token
Request Body: { "symbol": "AAPL", "quantity": 10, "price": 150.50, "side": "buy" }
Response: { "order_id": "your_order_id", "status": "pending" }

Get Order Status:

Endpoint: /api/order/<order_id>
Method: GET
Description: Retrieves the status of a specific order.
Authorization: Bearer Token
Response: { "order_id": "your_order_id", "status": "completed", "filled_quantity": 10, "remaining_quantity": 0 }

from flask import Flask, request

app = Flask(__name__)

# Sample data to be stored in the server
users = {
    "user1": {
        "name": "John Doe",
        "email": "[email protected]",
        "password": "password123",
        "accounts": ["account1"]
    }
}

accounts = {
    "account1": {
        "user_id": "user1",
        "balance": 10000.0,
        "stocks": {"AAPL": 10, "GOOGL": 5}
    }
}

# User Management API
@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = "user" + str(len(users) + 1)
    users[user_id] = {
        "name": data["name"],
        "email": data["email"],
        "password": data["password"],
        "accounts": []
    }
    return {"message": "User created successfully", "user_id": user_id}, 201

@app.route('/login', methods=['POST'])
def login():
    data = request.get_json()
    for user_id, user in users.items():
        if user["email"] == data["email"] and user["password"] == data["password"]:
            return {"message": "Login successful", "user_id": user_id}, 200
    return {"message": "Login failed"}, 401

@app.route('/users/<user_id>', methods=['GET'])
def get_user(user_id):
    if user_id in users:
        return users[user_id], 200
    return {"message": "User not found"}, 404

# Account Management API
@app.route('/accounts', methods=['POST'])
def create_account():
    data = request.get_json()
    account_id = "account" + str(len(accounts) + 1)
    user_id = data["user_id"]
    users[user_id]["accounts"].append(account_id)
    accounts[account_id] = {
        "user_id": user_id,
        "balance": data["initial_balance"],
        "stocks": {}
    }
    return {"message": "Account created successfully", "account_id": account_id}, 201

@app.route('/accounts/<account_id>', methods=['GET'])
def get_account(account_id):
    if account_id in accounts:
        return accounts[account_id], 200
    return {"message": "Account not found"}, 404

@app.route('/accounts/<account_id>', methods=['PATCH'])
def update_account(account_id):
    if account_id in accounts:
        data = request.get_json()
        accounts[account_id]["balance"] = data["balance"]
        return {"message": "Account updated successfully"}, 200
    return {"message": "Account not found"}, 404

# Trading API
@app.route('/buy', methods=['POST'])
def buy_stock():
    data = request.get_json()
    account_id = data["account_id"]
    stock_symbol = data["stock_symbol"]
    quantity = data["quantity"]
    stock_price = data["stock_price"]

    if account_id not in accounts:
        return {"message": "Account not found"}, 404

    total_cost = quantity * stock_price
    if total_cost > accounts[account_id]["balance"]:
        return {"message": "Insufficient funds"}, 400

    accounts[account_id]["balance"] -= total_cost
    if stock_symbol in accounts[account_id]["stocks"]:
        accounts[account_id]["stocks"][stock_symbol] += quantity
    else:
        accounts[account_id]["stocks"][stock_symbol] = quantity

    return {"message": "Stock bought successfully"}, 200

@app.route('/sell', methods=['POST'])
def sell_stock():
    data = request.get_json()
    account_id = data["account_id"]
    stock_symbol = data["stock_symbol"]
    quantity = data["quantity"]
    stock_price = data["stock_price"]

    if account_id not in accounts:
        return {"message": "Account not found"}, 404

    if stock_symbol not in accounts[account_id]["stocks"] or accounts[account_id]["stocks"][stock_symbol] < quantity:
        return {"message": "Insufficient stocks"}, 400

    total_earning = quantity * stock_price
    accounts[account_id]["balance"] += total_earning
    accounts[account_id]["stocks"][stock_symbol] -= quantity

    return {"message": "Stock sold successfully"}, 200

if __name__ == '__main__':
    app.run(debug=True)

Users:

Fields:
User_ID: Integer (Primary Key)
Username: String
Email: String
Password: String
Functionality:
Users can send messages to each other.
Users can make voice and video calls to each other.
Messages:

Fields:
Message_ID: Integer (Primary Key)
Sender_ID: Integer (Foreign Key from Users table)
Receiver_ID: Integer (Foreign Key from Users table)
Content: String
Timestamp: DateTime
Functionality:
Users can send text, emojis, stickers, and multimedia attachments.
Voice_Calls:

Fields:
Call_ID: Integer (Primary Key)
Caller_ID: Integer (Foreign Key from Users table)
Recipient_ID: Integer (Foreign Key from Users table)
Start_Time: DateTime
End_Time: DateTime
Functionality:
Users can make HD-quality voice calls.
Video_Calls:

Fields:
Call_ID: Integer (Primary Key)
Caller_ID: Integer (Foreign Key from Users table)
Recipient_ID: Integer (Foreign Key from Users table)
Start_Time: DateTime
End_Time: DateTime
Functionality:
Users can make HD-quality video calls.

# Import necessary libraries
from flask import Flask, request, jsonify

app = Flask(__name__)

# Simulated in-memory database for group chats
group_chats = {}

# Authentication API
@app.route('/authenticate', methods=['POST'])
def authenticate():
    data = request.json
    phone = data['phone']
    password = data['password']
    user = authenticate_user(phone, password)
    if user:
        return jsonify({'message': 'Authentication successful', 'user': user}), 200
    else:
        return jsonify({'message': 'Authentication failed'}), 401

# Send message API
@app.route('/send_message', methods=['POST'])
def send_viber_message():
    data = request.json
    sender = data['sender']
    receiver = data['receiver']
    message = data['message']
    if send_message(sender, receiver, message):
        return jsonify({'message': 'Message sent successfully'}), 200
    else:
        return jsonify({'message': 'Message sending failed'}), 400

# Add contact API
@app.route('/add_contact', methods=['POST'])
def add_viber_contact():
    data = request.json
    user = data['user']
    contact = data['contact']
    if add_contact(user, contact):
        return jsonify({'message': 'Contact added successfully'}), 200
    else:
        return jsonify({'message': 'Contact addition failed'}), 400

# Get user contacts API
@app.route('/get_contacts', methods=['GET'])
def get_viber_contacts():
    user = request.args.get('user')
    contacts = get_user_contacts(user)
    return jsonify({'contacts': contacts}), 200

# Group chat creation API
@app.route('/create_group_chat', methods=['POST'])
def create_viber_group_chat():
    data = request.json
    name = data['name']
    participants = data['participants']
    group_chat = create_group_chat(name, participants)
    group_chats[group_chat['group_id']] = group_chat
    return jsonify({'message': 'Group chat created', 'group_chat': group_chat}), 201

if __name__ == '__main__':
    app.run(debug=True)

import random

# Simulated in-memory user database
users = {
    'user1': {'id': 1, 'name': 'John Doe', 'phone': '+1234567890', 'password': 'pass1'},
    'user2': {'id': 2, 'name': 'Jane Smith', 'phone': '+0987654321', 'password': 'pass2'}
}

# User authentication
def authenticate_user(phone, password):
    for user in users.values():
        if user['phone'] == phone and user['password'] == password:
            return user
    return None

# Send message API
def send_message(sender, receiver, message):
    # Simulate message sending logic
    if receiver in users:
        return True
    return False

# Add contact API
def add_contact(user, contact):
    if contact not in users:
        return False
    # Simulate contact addition logic
    return True

# Get user contacts API
def get_user_contacts(user):
    return [contact for contact in users.values() if contact != user]

# Group chat creation API
def create_group_chat(name, participants):
    # Simulate group chat creation logic
    group_id = random.randint(1000, 9999)
    return {'group_id': group_id, 'name': name, 'participants': participants}

# Sample usage of the low-level APIs
if __name__ == "__main__":
    # User authentication example
    authenticated_user = authenticate_user('+1234567890', 'pass1')
    if authenticated_user:
        print(f"Authentication successful for {authenticated_user['name']}")
    else:
        print("Authentication failed")

    # Sending message example
    sender = 'user1'
    receiver = 'user2'
    message = "Hello, Viber!"
    if send_message(sender, receiver, message):
        print(f"Message sent from {sender} to {receiver}")
    else:
        print("Message sending failed")

    # Adding a contact example
    user = 'user1'
    contact = 'user2'
    if add_contact(user, contact):
        print(f"{user} added {contact} as a contact")
    else:
        print("Adding contact failed")

    # Getting user contacts example
    user = 'user1'
    contacts = get_user_contacts(user)
    print(f"{user}'s contacts: {contacts}")

    # Creating a group chat example
    name = 'Python Enthusiasts'
    participants = ['user1', 'user2']
    group_chat = create_group_chat(name, participants)
    print(f"Group chat created - ID: {group_chat['group_id']}, Name: {group_chat['name']}, Participants: {group_chat['participants']}")

import random

# Messaging
def send_message(sender, receiver, message):
    print(f"Message sent from {sender} to {receiver}: {message}")

# Voice and Video Calls
def make_voice_call(caller, recipient):
    print(f"{caller} is making a voice call to {recipient}")

def make_video_call(caller, recipient):
    print(f"{caller} is making a video call to {recipient}")

# Group Chats
def create_group_chat(participants):
    group_chat_id = random.randint(1000, 9999)
    print(f"Group chat created - ID: {group_chat_id}, Participants: {participants}")

# End-to-End Encryption
def encrypt_message(message, key):
    encrypted_message = f"Encrypted: {message} (key: {key})"
    return encrypted_message

# Public Accounts
class PublicAccount:
    def __init__(self, name):
        self.name = name

    def interact_with_followers(self):
        print(f"{self.name} is interacting with their followers")

# Stickers and GIFs
class Sticker:
    def __init__(self, name):
        self.name = name

    def send_sticker(self, recipient):
        print(f"Sticker '{self.name}' sent to {recipient}")

class GIF:
    def __init__(self, name):
        self.name = name

    def send_gif(self, recipient):
        print(f"GIF '{self.name}' sent to {recipient}")

# Media Sharing
def share_media(sender, receiver, media_type, media_url):
    print(f"{sender} shared {media_type} (URL: {media_url}) with {receiver}")


# Sample usage of each functionality
if __name__ == "__main__":
    # Messaging
    send_message("Alice", "Bob", "Hello, how are you?")

    # Voice and Video Calls
    make_voice_call("Alice", "Bob")
    make_video_call("Alice", "Bob")

    # Group Chats
    create_group_chat(["Alice", "Bob", "Charlie"])

    # End-to-End Encryption
    encrypted_message = encrypt_message("Sensitive information", "my_secret_key")
    print(encrypted_message)

    # Public Accounts
    business_account = PublicAccount("BusinessX")
    business_account.interact_with_followers()

    # Stickers and GIFs
    sticker = Sticker("Happy Emoji")
    gif = GIF("Dancing Cat")
    sticker.send_sticker("Bob")
    gif.send_gif("Alice")

    # Media Sharing
    share_media("Alice", "Bob", "Photo", "https://example.com/photo.jpg")

Users

User_id: Int (Primary Key)
Username: String
Email: String
Password: String
Classes

Class_id: Int (Primary Key)
Class_name: String
Teacher_id: Int (Foreign Key referencing Users.User_id)
Students: List of Integers (Foreign Key referencing Users.User_id)
Assignments

Assignment_id: Int (Primary Key)
Assignment_name: String
Description: String
Class_id: Int (Foreign Key referencing Classes.Class_id)
Due_date: DateTime
Submissions

Submission_id: Int (Primary Key)
Assignment_id: Int (Foreign Key referencing Assignments.Assignment_id)
Student_id: Int (Foreign Key referencing Users.User_id)
Submission_text: String
Timestamp: DateTime

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data (to be replaced with database interactions)
users = {}
courses = {}
assignments = {}
submissions = {}
announcements = {}


# Course Creation and Management
@app.route('/courses', methods=['POST'])
def create_course():
    course_data = request.json
    course_id = len(courses) + 1
    course_data['id'] = course_id
    courses[course_id] = course_data
    return jsonify({'message': 'Course created successfully', 'course_id': course_id}), 201


@app.route('/courses/<int:course_id>', methods=['GET'])
def get_course(course_id):
    if course_id not in courses:
        return jsonify({'message': 'Course not found'}), 404
    return jsonify(courses[course_id])


@app.route('/courses/<int:course_id>', methods=['PUT'])
def update_course(course_id):
    if course_id not in courses:
        return jsonify({'message': 'Course not found'}), 404

    course_data = request.json
    courses[course_id].update(course_data)
    return jsonify({'message': 'Course updated successfully'}), 200


# Assignment Distribution
@app.route('/assignments', methods=['POST'])
def create_assignment():
    assignment_data = request.json
    assignment_id = len(assignments) + 1
    assignment_data['id'] = assignment_id
    assignments[assignment_id] = assignment_data
    return jsonify({'message': 'Assignment created successfully', 'assignment_id': assignment_id}), 201


@app.route('/assignments/<int:assignment_id>', methods=['GET'])
def get_assignment(assignment_id):
    if assignment_id not in assignments:
        return jsonify({'message': 'Assignment not found'}), 404
    return jsonify(assignments[assignment_id])


@app.route('/assignments/<int:assignment_id>', methods=['PUT'])
def update_assignment(assignment_id):
    if assignment_id not in assignments:
        return jsonify({'message': 'Assignment not found'}), 404

    assignment_data = request.json
    assignments[assignment_id].update(assignment_data)
    return jsonify({'message': 'Assignment updated successfully'}), 200


# Submission and Grading
@app.route('/submissions', methods=['POST'])
def create_submission():
    submission_data = request.json
    submission_id = len(submissions) + 1
    submission_data['id'] = submission_id
    submissions[submission_id] = submission_data
    return jsonify({'message': 'Submission created successfully', 'submission_id': submission_id}), 201


@app.route('/submissions/<int:submission_id>', methods=['GET'])
def get_submission(submission_id):
    if submission_id not in submissions:
        return jsonify({'message': 'Submission not found'}), 404
    return jsonify(submissions[submission_id])


@app.route('/submissions/<int:submission_id>', methods=['PUT'])
def update_submission(submission_id):
    if submission_id not in submissions:
        return jsonify({'message': 'Submission not found'}), 404

    submission_data = request.json
    submissions[submission_id].update(submission_data)
    return jsonify({'message': 'Submission updated successfully'}), 200


# Announcements and Communication
@app.route('/announcements', methods=['POST'])
def create_announcement():
    announcement_data = request.json
    announcement_id = len(announcements) + 1
    announcement_data['id'] = announcement_id
    announcements[announcement_id] = announcement_data
    return jsonify({'message': 'Announcement created successfully', 'announcement_id': announcement_id}), 201


@app.route('/announcements/<int:announcement_id>', methods=['GET'])
def get_announcement(announcement_id):
    if announcement_id not in announcements:
        return jsonify({'message': 'Announcement not found'}), 404
    return jsonify(announcements[announcement_id])


# Integration with Google Suite
# Sample endpoint for demonstration purposes. In reality, it would require Google API integration.
@app.route('/share_google_doc', methods=['POST'])
def share_google_doc():
    # Implementation to share a Google document with students
    pass


# Streamlined Feedback
@app.route('/feedback/<int:student_id>', methods=['GET'])
def get_student_feedback(student_id):
    # Implementation to get feedback for a student by ID
    pass


@app.route('/feedback/<int:student_id>', methods=['POST'])
def provide_student_feedback(student_id):
    feedback_data = request.json
    # Implementation to provide feedback to a student
    pass


if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify
import datetime

app = Flask(__name__)

# Sample data to be stored in the server
users = {
    "user1": {
        "user_id": 1,
        "username": "JohnDoe",
        "email": "[email protected]",
        "password": "password123",
        "bio": "I love learning and teaching!",
    },
    "user2": {
        "user_id": 2,
        "username": "JaneSmith",
        "email": "[email protected]",
        "password": "password456",
        "bio": "Exploring the world of science!",
    },
}

courses = {
    "course1": {
        "course_id": 1,
        "course_name": "Mathematics 101",
        "teacher_id": 1,
        "students": [2],
    },
    "course2": {
        "course_id": 2,
        "course_name": "Science 202",
        "teacher_id": 2,
        "students": [1],
    },
}

assignments = {
    "assignment1": {
        "assignment_id": 1,
        "assignment_name": "Homework 1",
        "description": "Complete exercises 1 to 5",
        "course_id": 1,
        "due_date": "2023-07-31 23:59:59",
    },
    "assignment2": {
        "assignment_id": 2,
        "assignment_name": "Lab Report",
        "description": "Conduct experiments and submit a report",
        "course_id": 2,
        "due_date": "2023-08-15 23:59:59",
    },
}

submissions = {}

# User API
@app.route('/users', methods=['POST'])
def create_user():
    data = request.json
    user_id = len(users) + 1
    new_user = {
        "user_id": user_id,
        "username": data["username"],
        "email": data["email"],
        "password": data["password"],
        "bio": "",
    }
    users[data["username"]] = new_user
    return {"message": "User created successfully"}, 201

@app.route('/login', methods=['POST'])
def login():
    data = request.json
    username = data["username"]
    password = data["password"]
    if username in users and users[username]["password"] == password:
        return {"message": "Login successful"}, 200
    else:
        return {"message": "Login failed"}, 401

@app.route('/users/<int:user_id>', methods=['PATCH'])
def update_user(user_id):
    data = request.json
    for user in users.values():
        if user["user_id"] == user_id:
            user["bio"] = data["bio"]
            return {"message": "Profile updated successfully"}, 200
    return {"message": "User not found"}, 404

@app.route('/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    for user in users.values():
        if user["user_id"] == user_id:
            return jsonify(user), 200
    return {"message": "User not found"}, 404

# Course API
@app.route('/courses', methods=['POST'])
def create_course():
    data = request.json
    course_id = len(courses) + 1
    new_course = {
        "course_id": course_id,
        "course_name": data["course_name"],
        "teacher_id": data["teacher_id"],
        "students": data["students"],
    }
    courses[f"course{course_id}"] = new_course
    return {"message": "Course created successfully", "course_id": course_id}, 201

@app.route('/courses/<int:course_id>', methods=['GET'])
def get_course(course_id):
    for course in courses.values():
        if course["course_id"] == course_id:
            return jsonify(course), 200
    return {"message": "Course not found"}, 404

@app.route('/courses/<int:course_id>', methods=['PUT'])
def update_course(course_id):
    data = request.json
    for course in courses.values():
        if course["course_id"] == course_id:
            course["course_name"] = data["course_name"]
            course["students"] = data["students"]
            return {"message": "Course updated successfully"}, 200
    return {"message": "Course not found"}, 404

# Assignment API
@app.route('/assignments', methods=['POST'])
def create_assignment():
    data = request.json
    assignment_id = len(assignments) + 1
    new_assignment = {
        "assignment_id": assignment_id,
        "assignment_name": data["assignment_name"],
        "description": data["description"],
        "course_id": data["course_id"],
        "due_date": data["due_date"],
    }
    assignments[f"assignment{assignment_id}"] = new_assignment
    return {"message": "Assignment created successfully", "assignment_id": assignment_id}, 201

@app.route('/assignments/<int:assignment_id>', methods=['GET'])
def get_assignment(assignment_id):
    for assignment in assignments.values():
        if assignment["assignment_id"] == assignment_id:
            return jsonify(assignment), 200
    return {"message": "Assignment not found"}, 404

@app.route('/assignments/<int:assignment_id>', methods=['PUT'])
def update_assignment(assignment_id):
    data = request.json
    for assignment in assignments.values():
        if assignment["assignment_id"] == assignment_id:
            assignment["description"] = data["description"]
            assignment["due_date"] = data["due_date"]
            return {"message": "Assignment updated successfully"}, 200
    return {"message": "Assignment not found"}, 404

# Submission API
@app.route('/submissions', methods=['POST'])
def create_submission():
    data = request.json
    submission_id = len(submissions) + 1
    new_submission = {
        "submission_id": submission_id,
        "assignment_id": data["assignment_id"],
        "student_id": data["student_id"],
        "submission_text": data["submission_text"],
        "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
    }
    submissions[f"submission{submission_id}"] = new_submission
    return {"message": "Submission created successfully", "submission_id": submission_id}, 201

@app.route('/submissions/<int:submission_id>', methods=['GET'])
def get_submission(submission_id):
    if f"submission{submission_id}" in submissions:
        return jsonify(submissions[f"submission{submission_id}"]), 200
    return {"message": "Submission not found"}, 404

if __name__ == "__main__":
    app.run(debug=True)

User API:
POST /users:

Endpoint for creating a new user account.
Request body: { "username": "user1", "email": "[email protected]", "password": "password123" }
Response: { "message": "User created successfully" }
Explanation: This API allows users to create a new account with a unique username, email, and password.
POST /login:

Endpoint for user login.
Request body: { "username": "user1", "password": "password123" }
Response: { "message": "Login successful" }
Explanation: This API allows users to log in using their username and password.
GET /users/{user_id}:

Endpoint for retrieving user profile information.
Response: { "user_id": 1, "username": "user1", "email": "[email protected]" }
Explanation: This API allows users to view their own profile information based on their user_id.
PATCH /users/{user_id}:

Endpoint for updating user profile information.
Request body: { "bio": "I am a student at XYZ University" }
Response: { "message": "Profile updated successfully" }
Explanation: This API allows users to update their profile information, such as adding a bio or changing their email.
Course API:
POST /courses:

Endpoint for creating a new course.
Request body: { "course_name": "Mathematics 101", "teacher_id": 1, "students": [2, 3, 4] }
Response: { "message": "Course created successfully", "course_id": 1 }
Explanation: This API allows teachers to create a new course with a course name, teacher_id, and a list of student_ids.
GET /courses/{course_id}:

Endpoint for retrieving course information.
Response: { "course_id": 1, "course_name": "Mathematics 101", "teacher_id": 1, "students": [2, 3, 4] }
Explanation: This API allows users to view course information based on the course_id.
PUT /courses/{course_id}:

Endpoint for updating course information.
Request body: { "course_name": "Mathematics 102", "students": [3, 4, 5] }
Response: { "message": "Course updated successfully" }
Explanation: This API allows teachers to update course information, such as changing the course name or adding/removing students.
Assignment API:
POST /assignments:

Endpoint for creating a new assignment.
Request body: { "assignment_name": "Homework 1", "description": "Complete exercises 1 to 5", "course_id": 1, "due_date": "2023-07-31 23:59:59" }
Response: { "message": "Assignment created successfully", "assignment_id": 1 }
Explanation: This API allows teachers to create a new assignment for a specific course with a due date.
GET /assignments/{assignment_id}:

Endpoint for retrieving assignment details.
Response: { "assignment_id": 1, "assignment_name": "Homework 1", "description": "Complete exercises 1 to 5", "course_id": 1, "due_date": "2023-07-31 23:59:59" }
Explanation: This API allows users to view assignment details based on the assignment_id.
PUT /assignments/{assignment_id}:

Endpoint for updating assignment details.
Request body: { "description": "Complete exercises 1 to 10" }
Response: { "message": "Assignment updated successfully" }
Explanation: This API allows teachers to update assignment details, such as changing the description or due date.
Submission API:
POST /submissions:

Endpoint for submitting a new assignment.
Request body: { "assignment_id": 1, "student_id": 2, "submission_text": "Completed exercises 1 to 5", "timestamp": "2023-07-30 20:00:00" }
Response: { "message": "Submission created successfully", "submission_id": 1 }
Explanation: This API allows students to submit their assignments with the submission text and timestamp.
GET /submissions/{submission_id}:

Endpoint for retrieving submission details.
Response: { "submission_id": 1, "assignment_id": 1, "student_id": 2, "submission_text": "Completed exercises 1 to 5", "timestamp": "2023-07-30 20:00:00" }
Explanation: This API allows users to view submission details based on the submission_id.
PUT /submissions/{submission_id}:

Endpoint for updating submission details.
Request body: { "submission_text": "Completed exercises 1 to 10" }
Response: { "message": "Submission updated successfully" }
Explanation: This API allows students to update their submission text for an assignment.
Feed API:
GET /feed/{user_id}:
Endpoint for retrieving the user's feed.
Response: { "feed": [ ... ] }
Explanation: This API allows users to view their feed, which includes updates on courses, assignments, and submissions from the courses they are enrolled in.
Notification API:
GET /notifications/{user_id}:

Endpoint for retrieving user notifications.
Response: { "notifications": [ ... ] }
Explanation: This API allows users to view their notifications, such as assignment due date reminders or new course announcements.
PUT /notifications/{notification_id}:

Endpoint for marking a notification as read.
Request body: { "read": true }
Response: { "message": "Notification marked as read" }
Explanation: This API allows users to mark a notification as read once they have viewed it.

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data (to be replaced with database interactions)
users = {}
courses = {}
assignments = {}
submissions = {}


# User API
@app.route('/users', methods=['POST'])
def create_user():
    user_data = request.json
    user_id = len(users) + 1
    user_data['id'] = user_id
    users[user_id] = user_data
    return jsonify({'message': 'User created successfully', 'user_id': user_id}), 201


@app.route('/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    if user_id not in users:
        return jsonify({'message': 'User not found'}), 404
    return jsonify(users[user_id])


@app.route('/users/<int:user_id>', methods=['PUT'])
def update_user(user_id):
    if user_id not in users:
        return jsonify({'message': 'User not found'}), 404

    user_data = request.json
    users[user_id].update(user_data)
    return jsonify({'message': 'User updated successfully'}), 200


# Course API
@app.route('/courses', methods=['POST'])
def create_course():
    course_data = request.json
    course_id = len(courses) + 1
    course_data['id'] = course_id
    courses[course_id] = course_data
    return jsonify({'message': 'Course created successfully', 'course_id': course_id}), 201


@app.route('/courses/<int:course_id>', methods=['GET'])
def get_course(course_id):
    if course_id not in courses:
        return jsonify({'message': 'Course not found'}), 404
    return jsonify(courses[course_id])


@app.route('/courses/<int:course_id>', methods=['PUT'])
def update_course(course_id):
    if course_id not in courses:
        return jsonify({'message': 'Course not found'}), 404

    course_data = request.json
    courses[course_id].update(course_data)
    return jsonify({'message': 'Course updated successfully'}), 200


# Assignment API
@app.route('/assignments', methods=['POST'])
def create_assignment():
    assignment_data = request.json
    assignment_id = len(assignments) + 1
    assignment_data['id'] = assignment_id
    assignments[assignment_id] = assignment_data
    return jsonify({'message': 'Assignment created successfully', 'assignment_id': assignment_id}), 201


@app.route('/assignments/<int:assignment_id>', methods=['GET'])
def get_assignment(assignment_id):
    if assignment_id not in assignments:
        return jsonify({'message': 'Assignment not found'}), 404
    return jsonify(assignments[assignment_id])


@app.route('/assignments/<int:assignment_id>', methods=['PUT'])
def update_assignment(assignment_id):
    if assignment_id not in assignments:
        return jsonify({'message': 'Assignment not found'}), 404

    assignment_data = request.json
    assignments[assignment_id].update(assignment_data)
    return jsonify({'message': 'Assignment updated successfully'}), 200


# Submission API
@app.route('/submissions', methods=['POST'])
def create_submission():
    submission_data = request.json
    submission_id = len(submissions) + 1
    submission_data['id'] = submission_id
    submissions[submission_id] = submission_data
    return jsonify({'message': 'Submission created successfully', 'submission_id': submission_id}), 201


@app.route('/submissions/<int:submission_id>', methods=['GET'])
def get_submission(submission_id):
    if submission_id not in submissions:
        return jsonify({'message': 'Submission not found'}), 404
    return jsonify(submissions[submission_id])


@app.route('/submissions/<int:submission_id>', methods=['PUT'])
def update_submission(submission_id):
    if submission_id not in submissions:
        return jsonify({'message': 'Submission not found'}), 404

    submission_data = request.json
    submissions[submission_id].update(submission_data)
    return jsonify({'message': 'Submission updated successfully'}), 200


if __name__ == '__main__':
    app.run(debug=True)

class ShazmSimulation:
    def __init__(self):
        # Simulated numbers for Shazm
        self.total_users = 100_000_000
        self.daily_active_users = 25_000_000
        self.songs_recognized_per_user_per_day = 2
        self.total_songs_recognized_per_day = self.daily_active_users * self.songs_recognized_per_user_per_day

        # Storage estimation
        self.average_audio_clip_size_MB = 3
        self.total_storage_per_day_TB = self.total_songs_recognized_per_day * self.average_audio_clip_size_MB / 1_000
        self.total_storage_next_3_years_PB = self.total_storage_per_day_TB * 5 * 365

        # Requests per second estimation
        self.requests_per_second = self.total_songs_recognized_per_day / (3600 * 24)

    def print_simulation_results(self):
        print("Simulated Shazm Scalability:")
        print(f"Total number of users: {self.total_users}")
        print(f"Daily active users (DAU): {self.daily_active_users}")
        print(f"Songs recognized by user/day: {self.songs_recognized_per_user_per_day}")
        print(f"Total songs recognized per day: {self.total_songs_recognized_per_day}")
        print(f"Storage per day: {self.total_storage_per_day_TB:.2f} TB")
        print(f"Storage for the next 3 years: {self.total_storage_next_3_years_PB:.2f} PB")
        print(f"Requests per second: {self.requests_per_second:.2f} requests/second")


if __name__ == "__main__":
    shazm_sim = ShazmSimulation()
    shazm_sim.print_simulation_results()

Users

Username: String
Email: String
Password: String
Songs

SongID: Integer (Primary Key)
Title: String
Artist: String
Album: String
ReleaseYear: Integer
AudioFingerprint: String (Unique)
Recognitions (Recognition History)

RecognitionID: Integer (Primary Key)
Timestamp: DateTime
UserID: Integer (Foreign Key - Users)
SongID: Integer (Foreign Key - Songs)

from flask import Flask, request, jsonify
import uuid
import datetime

app = Flask(__name__)

# Dummy data for demonstration purposes
users = {}
songs = {}
recognitions = []

# User Registration Service
@app.route('/users/register', methods=['POST'])
def register_user():
    data = request.json
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')

    if email in users:
        return jsonify({"error": "User with the same email already exists."}), 400

    user_id = str(uuid.uuid4())
    users[email] = {
        "user_id": user_id,
        "username": username,
        "email": email,
        "password": password
    }
    return jsonify({"message": "User registered successfully"}), 201

# Song Recognition Service
@app.route('/songs/recognize', methods=['POST'])
def recognize_song():
    data = request.json
    user_id = data.get('user_id')
    audio_clip = data.get('audio_clip')

    # Perform audio recognition here (dummy implementation)
    song_id = str(uuid.uuid4())
    songs[song_id] = {
        "song_id": song_id,
        "title": "Song Title",
        "artist": "Artist Name",
        "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    }

    recognition_id = str(uuid.uuid4())
    recognition = {
        "recognition_id": recognition_id,
        "user_id": user_id,
        "song_id": song_id,
        "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    }
    recognitions.append(recognition)

    return jsonify({
        "song_id": song_id,
        "title": "Song Title",
        "artist": "Artist Name",
        "timestamp": recognition["timestamp"]
    }), 200

# User Recognition History Service
@app.route('/users/<string:user_id>/recognition-history', methods=['GET'])
def get_recognition_history(user_id):
    recognition_history = []
    for recognition in recognitions:
        if recognition['user_id'] == user_id:
            song_id = recognition['song_id']
            song = songs.get(song_id)
            if song:
                recognition_history.append({
                    "song_id": song_id,
                    "title": song["title"],
                    "artist": song["artist"],
                    "timestamp": recognition["timestamp"]
                })

    if not recognition_history:
        return jsonify({"error": "User not found or no recognition history."}), 404

    return jsonify({"user_id": user_id, "recognitions": recognition_history}), 200

# Song Metadata Service
@app.route('/songs/<string:song_id>', methods=['GET'])
def get_song_metadata(song_id):
    song = songs.get(song_id)
    if not song:
        return jsonify({"error": "Song not found."}), 404

    return jsonify({
        "song_id": song_id,
        "title": song["title"],
        "artist": song["artist"],
        "album": song.get("album"),
        "release_year": song.get("release_year"),
        "genre": song.get("genre")
    }), 200

if __name__ == '__main__':
    app.run(debug=True)

Audio Recognition Endpoint

Endpoint: /recognize
Method: POST
Description: This endpoint allows users to submit an audio clip for recognition.
Request Body:
Audio file (multipart/form-data)
Response:
200 OK: Successfully recognized the song.
400 Bad Request: Invalid or unsupported audio format.
404 Not Found: Song not recognized.
User Account Endpoint

Endpoint: /users
Method: POST
Description: Create a new user account.
Request Body:
User details (JSON)
Username
Email
Password
Response:
201 Created: Account successfully created.
400 Bad Request: Invalid user details.
409 Conflict: User already exists.
User History Endpoint

Endpoint: /users/{user_id}/history
Method: GET
Description: Get the recognition history for a specific user.
Response:
200 OK: Successfully retrieved the user's history.
404 Not Found: User not found.

from flask import Flask, request, jsonify
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash
from datetime import datetime

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///shazm.db'
db = SQLAlchemy(app)

# Database Models
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password = db.Column(db.String(128), nullable=False)
    recognition_history = db.relationship('RecognitionHistory', backref='user', lazy=True)

class Song(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(200), nullable=False)
    artist = db.Column(db.String(200), nullable=False)
    album = db.Column(db.String(200))
    release_year = db.Column(db.Integer)
    audio_fingerprint = db.Column(db.String(200), unique=True, nullable=False)

class RecognitionHistory(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    timestamp = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
    song_id = db.Column(db.Integer, db.ForeignKey('song.id'), nullable=False)

# Audio Processing Functions (dummy implementation)
def process_audio(audio_file):
    # Implement audio processing and fingerprinting here
    # Return song_info if recognized, otherwise return None
    song_info = {
        'title': 'Song Title',
        'artist': 'Artist Name',
        'album': 'Album Name',
    }
    return song_info

# User Account Functions
def create_user_account(username, email, password):
    if User.query.filter_by(username=username).first() or User.query.filter_by(email=email).first():
        return None

    new_user = User(username=username, email=email, password=generate_password_hash(password))
    db.session.add(new_user)
    db.session.commit()
    return new_user.id

def get_user_history(user_id):
    user = User.query.get(user_id)
    if user is None:
        return []

    return [{
        'timestamp': entry.timestamp,
        'song_title': entry.song.title,
        'artist': entry.song.artist,
        'album': entry.song.album
    } for entry in user.recognition_history]

# API Endpoints
@app.route('/recognize', methods=['POST'])
def recognize_audio():
    if 'audio' not in request.files:
        return jsonify({'error': 'No audio file provided.'}), 400

    audio_file = request.files['audio']
    if audio_file.filename == '':
        return jsonify({'error': 'No selected file.'}), 400

    song_info = process_audio(audio_file)
    if song_info is None:
        return jsonify({'error': 'Song not recognized.'}), 404

    # In a real system, you would store the recognized song in the database.
    # For simplicity, we're just returning the song_info for this example.
    return jsonify(song_info), 200

@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    if not data or 'username' not in data or 'email' not in data or 'password' not in data:
        return jsonify({'error': 'Invalid user details.'}), 400

    user_id = create_user_account(data['username'], data['email'], data['password'])
    if user_id is None:
        return jsonify({'error': 'User already exists.'}), 409

    return jsonify({'user_id': user_id}), 201

@app.route('/users/<int:user_id>/history', methods=['GET'])
def get_history(user_id):
    user = User.query.get(user_id)
    if user is None:
        return jsonify({'error': 'User not found.'}), 404

    history = get_user_history(user_id)
    return jsonify(history), 200

if __name__ == '__main__':
    db.create_all()
    app.run()

from flask import Flask, request, jsonify
import uuid
import datetime

app = Flask(__name__)

# Dummy data for demonstration purposes
users = {}
songs = {}
recognitions = []

# User Registration Service
@app.route('/users/register', methods=['POST'])
def register_user():
    data = request.json
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')

    if email in users:
        return jsonify({"error": "User with the same email already exists."}), 400

    user_id = str(uuid.uuid4())
    users[email] = {
        "user_id": user_id,
        "username": username,
        "email": email,
        "password": password
    }
    return jsonify({"message": "User registered successfully"}), 201

# Song Recognition Service
@app.route('/songs/recognize', methods=['POST'])
def recognize_song():
    data = request.json
    user_id = data.get('user_id')
    audio_clip = data.get('audio_clip')

    # Perform audio recognition here (dummy implementation)
    song_id = str(uuid.uuid4())
    songs[song_id] = {
        "song_id": song_id,
        "title": "Song Title",
        "artist": "Artist Name",
        "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    }

    recognition_id = str(uuid.uuid4())
    recognition = {
        "recognition_id": recognition_id,
        "user_id": user_id,
        "song_id": song_id,
        "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    }
    recognitions.append(recognition)

    return jsonify({
        "song_id": song_id,
        "title": "Song Title",
        "artist": "Artist Name",
        "timestamp": recognition["timestamp"]
    }), 200

# User Recognition History Service
@app.route('/users/<string:user_id>/recognition-history', methods=['GET'])
def get_recognition_history(user_id):
    recognition_history = []
    for recognition in recognitions:
        if recognition['user_id'] == user_id:
            song_id = recognition['song_id']
            song = songs.get(song_id)
            if song:
                recognition_history.append({
                    "song_id": song_id,
                    "title": song["title"],
                    "artist": song["artist"],
                    "timestamp": recognition["timestamp"]
                })

    if not recognition_history:
        return jsonify({"error": "User not found or no recognition history."}), 404

    return jsonify({"user_id": user_id, "recognitions": recognition_history}), 200

# Song Metadata Service
@app.route('/songs/<string:song_id>', methods=['GET'])
def get_song_metadata(song_id):
    song = songs.get(song_id)
    if not song:
        return jsonify({"error": "Song not found."}), 404

    return jsonify({
        "song_id": song_id,
        "title": song["title"],
        "artist": song["artist"],
        "album": song.get("album"),
        "release_year": song.get("release_year"),
        "genre": song.get("genre")
    }), 200

if __name__ == '__main__':
    app.run(debug=True)